diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..8ec827b
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: true
+contact_links:
+  - name: Contribution guide
+    url: https://github.com/rafaelob/fleet-codex/blob/main/CONTRIBUTING.md
+    about: Learn how to submit an arrangement, correction or pull request.
diff --git a/.github/ISSUE_TEMPLATE/correction.yml b/.github/ISSUE_TEMPLATE/correction.yml
new file mode 100644
index 0000000..9f350f2
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/correction.yml
@@ -0,0 +1,30 @@
+name: Correction or bug
+description: Report a problem or suggest a correction to an existing arrangement or tool.
+title: "[Correction]: "
+body:
+  - type: input
+    id: component
+    attributes:
+      label: Arrangement or component
+      description: For example Advanced Delivery, Lean Delivery, a skill, plugin, spawn hook or installation guide.
+    validations:
+      required: true
+  - type: textarea
+    id: behavior
+    attributes:
+      label: Current and expected behavior
+      description: Explain what happens now and what should happen instead.
+    validations:
+      required: true
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Reproduction and environment
+      description: Include the exact Codex version, platform and minimal reproduction. Remove credentials, personal paths and private project content.
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Suggested correction
+      description: If known, describe a fix or link an existing pull request.
diff --git a/.github/ISSUE_TEMPLATE/new-arrangement.yml b/.github/ISSUE_TEMPLATE/new-arrangement.yml
new file mode 100644
index 0000000..c0d8c5e
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/new-arrangement.yml
@@ -0,0 +1,30 @@
+name: New arrangement
+description: Propose a new lead and subagent combination.
+title: "[Arrangement]: "
+body:
+  - type: textarea
+    id: purpose
+    attributes:
+      label: Purpose and audience
+      description: What work does the arrangement serve, and how does it differ from existing options?
+    validations:
+      required: true
+  - type: textarea
+    id: allocation
+    attributes:
+      label: Proposed allocation
+      description: Describe the lead, specialist roles, model and effort choices, and suggested concurrency.
+    validations:
+      required: true
+  - type: textarea
+    id: components
+    attributes:
+      label: Optional components and licensing
+      description: Identify proposed public skills or hooks, their sources and licenses. Do not include personal configuration or credentials.
+  - type: textarea
+    id: evidence
+    attributes:
+      label: Compatibility and evidence
+      description: Give the Codex version, platform and sanitized observations. State clearly what has not yet been tested.
+    validations:
+      required: true
diff --git a/.github/ISSUE_TEMPLATE/new-component.yml b/.github/ISSUE_TEMPLATE/new-component.yml
new file mode 100644
index 0000000..a932b97
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/new-component.yml
@@ -0,0 +1,35 @@
+name: New workflow component
+description: Propose an independent skill, plugin or hook for community reuse.
+title: "[Component]: "
+body:
+  - type: dropdown
+    id: kind
+    attributes:
+      label: Component type
+      options:
+        - Skill
+        - Plugin
+        - Hook
+    validations:
+      required: true
+  - type: textarea
+    id: purpose
+    attributes:
+      label: Workflow and value
+      description: Explain the situations this component helps, its boundaries and existing alternatives.
+    validations:
+      required: true
+  - type: textarea
+    id: packaging
+    attributes:
+      label: Package and access
+      description: Describe the format, bundled capabilities, license, dependencies, permissions and external data flow. No credentials or private endpoints.
+    validations:
+      required: true
+  - type: textarea
+    id: evidence
+    attributes:
+      label: Validation and installation evidence
+      description: Include the exact runtime version, platform and sanitized results, or explicitly identify what is not tested yet.
+    validations:
+      required: true
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..417410c
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,23 @@
+## Arrangement or component and purpose
+
+Describe the intended work, division of responsibility and tradeoffs.
+
+## Changes
+
+List configuration, instruction, skill, plugin or hook changes and licensing provenance.
+
+## Functional evidence
+
+Provide exact Codex version, platform and sanitized results for installation,
+role/model selection and delegation. For hook changes, include real allow/deny
+evidence. State unavailable or unmeasured checks explicitly.
+For component-only PRs, demonstrate the changed component's real entry point.
+For plugins, identify the manifest format, bundled capabilities and upstream
+schema check; structural preflight is not installation evidence.
+
+## Checks
+
+- [ ] Catalog validator and relevant executable tests pass.
+- [ ] No credentials, personal paths, private services or whole-home config dumps.
+- [ ] Component licenses and notices are preserved.
+- [ ] Version, installation instructions and changelog describe the final change.
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
new file mode 100644
index 0000000..5be297d
--- /dev/null
+++ b/.github/workflows/validate.yml
@@ -0,0 +1,29 @@
+name: Validate catalog
+
+on:
+  pull_request:
+  push:
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    name: Python ${{ matrix.python }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        python: ["3.11", "3.14"]
+    steps:
+      - uses: actions/checkout@fbc6f3992d24b796d5a048ff273f7fcc4a7b6c09
+      - uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Validate catalog
+        run: python -X utf8 scripts/validate_catalog.py
+      - name: Validate reusable components
+        run: python -X utf8 scripts/validate_components.py
+      - name: Run behavioral tests
+        run: python -X utf8 -m unittest discover -s tests -v
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5fae3ed
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+__pycache__/
+*.pyc
+.venv/
+.runtime-validation/
diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..5589398
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,23 @@
+# Maintaining this catalog
+
+Tracker: github — rafaelob/fleet-codex. Issues hold intent, acceptance and delivery evidence.
+
+This file guides work on the catalog itself. Installation snippets are the
+`AGENTS*.snippet.md` files under `arrangements/`; do not install this file as an
+orchestration policy.
+
+- `arrangements/` owns lead/subagent TOMLs and insertable instruction sections.
+- `skills/`, `plugins/` and `hooks/` contain independent, optional components.
+- `docs/` explains installation, tradeoffs and sanitized runtime evidence.
+- Run `python -X utf8 scripts/validate_catalog.py`,
+  `python -X utf8 scripts/validate_components.py` and
+  `python -X utf8 -m unittest discover -s tests -v` from this repository root.
+  These use Python 3.11+ and its standard library; no package manager is required.
+- Keep installable content, code, Issues and PRs in English; translated guides
+  may supplement English documentation. Preserve component licenses and notices.
+- Never include personal configuration, credentials or raw runtime sessions.
+  Keep experimental runtime fixtures in the ignored `.runtime-validation/` area
+  and remove owned temporary credentials and processes when testing ends.
+- Follow `CONTRIBUTING.md` for package contracts and evidence. Update
+  `docs/CHANGELOG.md` for a delivered change; static checks do not prove model,
+  plugin or hook integration.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..ace6fd3
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,128 @@
+# Contributing
+
+An arrangement describes a useful way to divide work between one lead and its
+subagents. Explain the kinds of work it serves, the tradeoffs, and when a user
+should choose another arrangement. Do not claim cost savings or quality gains
+without identifying the measurements behind them.
+
+All source code, configuration, agent instructions, skills, issues and pull
+requests use English. Optional documentation translations may use another
+language; keep the English guide authoritative and link translations from it.
+
+## Ways to contribute
+
+- Share a new combination through the New arrangement issue form or a PR.
+- Correct instructions, configuration, compatibility evidence or bugs in an
+  existing arrangement through the Correction issue form or a focused PR.
+- Share or improve a standalone skill, plugin, hook, tests or installation guide, with evidence
+  proportional to the behavior changed.
+
+An issue is useful for discussing a substantial change, but not required before
+a small correction. Search existing issues and PRs before opening another.
+
+## Send a pull request
+
+1. Fork this repository on GitHub and clone your fork.
+2. Create a descriptive branch, such as `add-my-arrangement` or
+   `fix-lean-delivery-installation`.
+3. Make one coherent change. For corrections, show the current problem and the
+   resulting behavior; for a new arrangement, include the complete package below.
+4. Run the checks and relevant runtime validation. Review your complete diff for
+   private configuration, credentials and unrelated files.
+5. Commit and push the branch to your fork, then open a PR targeting this
+   repository's `main` branch. Fill in the provided PR template in English.
+6. Address review feedback in the same PR. Maintainers review compatibility,
+   licensing and evidence before merging.
+
+You do not need collaborator access to submit a PR from a public fork. The
+repository provides issue forms, a PR template and CI checks; no private
+coordination tooling or installation is required to contribute.
+
+## Package contract
+
+Create `arrangements/<unique-id>/` with:
+
+| File | Purpose |
+| --- | --- |
+| `arrangement.toml` | Package identity, version, author, license, target Codex version and relative component paths; report tested support separately |
+| `config.toml` | Lead model/effort, V2 settings and thread cap only |
+| `agents/*.toml` | One complete configuration per specialist |
+| `AGENTS.snippet.md` | Standalone orchestration instructions for user or project scope |
+| `README.md` | Use cases, model/role mapping, installation link, limitations and evidence |
+
+An optional with-skill snippet must invoke the packaged skills by their exact names
+and describe when to use them. Declare optional_skills as a nonempty list of
+relative directories; each must resolve inside this repository and contain SKILL.md.
+The with-skill snippet is valid only with that nonempty list; omit both when no
+skill variant is provided. Components have no download-on-use dependencies or
+personal paths.
+The required thread cap is features.multi_agent_v2.max_concurrent_threads_per_session;
+the optional root agents table may contain only default subagent model and
+reasoning-effort values.
+An optional hook is a contained relative directory with a README.md documenting
+installation, supported runtime and entrypoint; its implementation may use any
+supported language and does not require a guard.py file.
+
+Use the current manifests as examples of schema version 1. The validator is the
+executable contract. The five core role keys are `name`, `description`, `model`,
+`model_reasoning_effort` and `developer_instructions`; optional `nickname_candidates`
+is English display metadata only. When present it is a nonempty list of strings:
+each candidate is trimmed, nonblank, unique after trimming, and limited to ASCII
+letters, digits, spaces, hyphens and underscores. Filename and role name must
+match. Put the role's behavior in its instructions, without requiring another
+skill, plugin, MCP server, personal configuration or private service.
+
+Keep credentials, provider connections, permissions, hooks and skills out of role
+TOMLs. If a workflow needs an optional public capability, document it separately
+with installation, license, required access and what happens when it is absent.
+Do not include any credential, local session, transcript, database, login cache,
+private project identifier or personal absolute path.
+
+## Verify before opening a PR
+
+For independent components, use `skills/<skill-name>/`, `plugins/<plugin-name>/`
+or `hooks/<hook-name>/`, not an arrangement's version directory. A component may
+serve any arrangement and must have its own purpose, license/provenance,
+installation/removal instructions and evidence. A plugin may bundle skills,
+public MCP configuration and hooks; follow the [plugin contribution contract](plugins/README.md).
+Do not add a mandatory MCP connection or skill dependency to an agent role.
+The [skill guide](skills/README.md) explains invocation and optional instruction
+sections. A focused component PR need not add or modify an arrangement.
+
+Run with Python 3.11 or newer; no package installation is necessary:
+
+```text
+python -X utf8 scripts/validate_catalog.py
+python -X utf8 scripts/validate_components.py
+python -X utf8 -m unittest discover -s tests -v
+```
+
+Also install the arrangement into a clean user or project scope and demonstrate
+one real delegation: selected role, resolved model/effort, returned artifact and
+parent verification. State the exact CLI version, platform, date, failures and
+unmeasured claims. Do not publish authentication material or raw transcripts.
+An unavailable required check remains a blocker, not a pass.
+
+For a component-only change, exercise that component's real entry point instead
+of unrelated model configurations. Plugin structural preflight is not full
+upstream-schema validation or installation proof: validate the selected manifest
+dialect and demonstrate the bundled capabilities in the named runtime. Report
+zero contributed plugins as zero, not as a passing plugin integration test.
+
+For hooks, show that an allowed call proceeds and a denied call cannot execute
+through the supported runtime path. A script test alone is insufficient. Explain
+which tools/events are covered and which guarantees remain instructions only.
+
+CI validates packages and executable behavior without model credentials. External
+contributors' code runs with read-only repository permissions and no secrets.
+
+## Review and updates
+
+Use a PR for new arrangements and changes to published ones. Bump the arrangement
+version when its behavior changes, update its evidence, and add a changelog entry.
+Preserve contributor attribution and licenses, including notices on derived
+skills. A copied instruction is still a licensed work.
+
+Keep executable tests focused on behavior: malformed configuration, broken paths,
+escaping references, and hook decisions. Documentation consistency belongs in
+the package validator and review, not snapshot tests of prose.
diff --git a/README.md b/README.md
index e76564a..470169b 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,93 @@
-# fleet-codex
\ No newline at end of file
+# fleet-codex
+
+Share complete, opinionated combinations of a Codex lead agent and specialist
+subagents. Choose an arrangement, install its TOMLs and instructions, and adapt
+it to your work. You do not need any private framework, MCP server or paid
+third-party orchestration service to use these files.
+
+[Guia em português](docs/README.pt-BR.md) ·
+[Installation](docs/installation.md) · [Contributing](CONTRIBUTING.md) ·
+[Orchestration rationale](docs/orchestration.md) ·
+[Skills](skills/README.md) · [Plugins](plugins/README.md) ·
+[Validation and compatibility](docs/validation.md)
+
+Version 0.1.0 is a community preview. Real hook and selected-role tests are
+recorded; full runtime coverage, including concurrency saturation, is not claimed.
+
+## Choose an arrangement
+
+| Arrangement | Lead | Specialist allocation | Configured cap / recommended active children |
+| --- | --- | --- | --- |
+| [Advanced Delivery](arrangements/advanced-delivery/README.md) | `gpt-5.6-sol`, `xhigh` | 4 Astra, 9 Terra, 6 Luna | 6 / up to 5 |
+| [Lean Delivery](arrangements/lean-delivery/README.md) | `gpt-5.6-sol`, `high` | 1 Astra, 1 Sol, 17 Luna | 7 / up to 6 |
+
+Both arrangements provide the same 19 roles and enable Multi-Agent V2. Roles
+are available choices, not 19 agents started together. Allocate only useful,
+independent work; parallel calls consume additional model tokens.
+
+Advanced Delivery targets complex product work and spends more of its model
+allocation on design, advice, critical review and coupled implementation.
+Lean Delivery targets cost-conscious delivery on well-defined work: it uses Luna
+broadly, keeps Astra for critical review, and uses Sol `high` to review integration
+across deliveries. Backend and frontend implementation use Luna. If ambiguity or business risk exceeds the selected
+role's capability, the lead reassesses the assignment before continuing.
+These are routing objectives, not measured cost or quality guarantees; total
+cost also depends on task length, retries and parallelism.
+
+The explicit V2 cap includes the lead in the target runtime. The child
+recommendations above reserve that slot. Recheck [compatibility evidence](docs/validation.md)
+when upgrading the runtime or changing the cap's configuration field.
+
+## What comes with an arrangement
+
+- A small `config.toml` fragment and standalone `agents/*.toml` files.
+- A self-contained AGENTS.md snippet, or a variant with inline triggers for the
+  optional [codex-orchestration](skills/codex-orchestration/SKILL.md) and
+  [pragmatic-programmer](skills/pragmatic-programmer/SKILL.md) skills.
+- An optional [spawn-contract hook](hooks/spawn-contract/README.md) that checks
+  explicit role selection and fresh-context delegation where the runtime
+  intercepts spawn calls.
+- A manifest describing the package, its author, license and runtime baseline.
+
+Installation is manual. Merge only the documented settings into your existing
+configuration; your credentials, permissions, tools and MCP configuration remain
+your responsibility. Choosing an arrangement does not grant its agents new
+permissions.
+
+## Contribute your combination
+
+Start with an existing arrangement, choose a distinct directory name, explain
+the tradeoffs and include functional evidence. Skills, plugins and hooks are optional.
+The [contribution guide](CONTRIBUTING.md) defines the package contract and checks.
+Submit a pull request; do not upload your entire Codex home.
+
+- [Propose an arrangement](https://github.com/rafaelob/fleet-codex/issues/new?template=new-arrangement.yml)
+- [Report a correction](https://github.com/rafaelob/fleet-codex/issues/new?template=correction.yml)
+- [Propose a skill, plugin or hook](https://github.com/rafaelob/fleet-codex/issues/new?template=new-component.yml)
+- [Open a pull request](https://github.com/rafaelob/fleet-codex/compare)
+
+You can contribute a new combination or improve an existing one. Public source,
+configuration, instructions, issues and PRs use English; translated documentation
+guides are welcome. See the [changelog](docs/CHANGELOG.md) for published changes.
+
+## Share reusable workflow components
+
+Components live outside the arrangements so they can serve either arrangement,
+another community combination, or an existing workflow:
+
+- [skills/](skills/README.md): standalone, optional skills, including
+  `codex-orchestration` and `pragmatic-programmer`.
+- [plugins/](plugins/README.md): independently contributed plugin packages that
+  may bundle skills, public MCP configurations and hooks.
+- [hooks/](hooks/spawn-contract/README.md): independently installable hook components.
+
+The first release includes two skills and one standalone hook, not an installable
+plugin bundle. Plugin contributions follow the official package format and need
+their own installation and runtime evidence. No component is enabled by choosing
+an arrangement.
+
+## License
+
+The catalog, agent configurations and hook are MIT licensed. The adapted
+skills carry their own Apache-2.0 licenses and notices. Preserve
+the applicable license files when redistributing components.
diff --git a/arrangements/advanced-delivery/AGENTS.snippet.md b/arrangements/advanced-delivery/AGENTS.snippet.md
new file mode 100644
index 0000000..ad72863
--- /dev/null
+++ b/arrangements/advanced-delivery/AGENTS.snippet.md
@@ -0,0 +1,27 @@
+## Multi-Agent V2 orchestration
+
+### Routing
+
+Delegate only a bounded task with an independent result.
+Inspect relevant live role descriptions and the current spawn schema; `list_agents` shows the running tree, not a role catalog.
+Match an available role and its resolved allocation to read-only discovery, research, decision, or review; a bounded known artifact; unknown-cause diagnosis; coupled invariants; or integration review.
+Use the least resource-intensive safe role; do not give edits to a read-only role.
+
+### Dispatch contract
+
+The parent owns selection, integration, validation, and outcome; children never spawn children.
+Every spawn explicitly sets `agent_type` and `fork_turns: "none"` and omits call-level model and reasoning-effort overrides.
+The brief contains only relevant context, accepted decisions, and any relevant plan; outcome and acceptance criterion; in/out scope and ownership; interfaces and access constraints; expected artifact and checks; and stop conditions plus next consumer.
+It needs neither a separate plan document nor a history dump.
+
+### Ownership and evidence
+
+Keep writing ownership non-overlapping; serialize shared files, state, and interacting contracts.
+`send_message` only queues a message; `followup_task` starts a completed child on a new turn with its history.
+Stop or redirect a child that lacks evidence, exceeds its brief, repeats failure, or conflicts with owned work.
+Only the parent integrates, inspects the diff, and verifies responsible checks; skipped, unavailable, or mocked required checks block acceptance.
+
+### Capacity
+
+This fragment configures 6 total session threads, including the parent; use at most 5 simultaneous children.
+See [runtime validation](https://github.com/rafaelob/fleet-codex/blob/main/docs/validation.md) for environment-specific verification. A refused spawn does not justify idling while independent local work remains.
diff --git a/arrangements/advanced-delivery/AGENTS.with-skill.snippet.md b/arrangements/advanced-delivery/AGENTS.with-skill.snippet.md
new file mode 100644
index 0000000..46ebfb9
--- /dev/null
+++ b/arrangements/advanced-delivery/AGENTS.with-skill.snippet.md
@@ -0,0 +1,34 @@
+## Multi-Agent V2 orchestration
+
+Optional skills can be installed independently. Use the fallback in the relevant section when one is absent; do not invent a callable Skill API on Codex CLI.
+
+### Routing
+
+For dispatch, call the runtime's Skill tool with `codex-orchestration` when exposed; otherwise use its native skill-loading interface to read `SKILL.md`. In Codex prompts, use `$codex-orchestration`.
+If it is absent, inspect relevant live role descriptions and the current spawn schema; `list_agents` shows the running tree, not a role catalog.
+Match an available role and its resolved allocation to read-only discovery, research, decision, or review; a bounded known artifact; unknown-cause diagnosis; coupled invariants; or integration review.
+Use the least resource-intensive safe role; do not give edits to a read-only role.
+
+### Dispatch contract
+
+The parent owns selection, integration, validation, and outcome; children never spawn children.
+Every spawn explicitly sets `agent_type` and `fork_turns: "none"` and omits call-level model and reasoning-effort overrides.
+The brief contains only relevant context, accepted decisions, and any relevant plan; outcome and acceptance criterion; in/out scope and ownership; interfaces and access constraints; expected artifact and checks; and stop conditions plus next consumer.
+It needs neither a separate plan document nor a history dump.
+
+### Ownership and evidence
+
+Keep writing ownership non-overlapping; serialize shared files, state, and interacting contracts.
+`send_message` only queues a message; `followup_task` starts a completed child on a new turn with its history.
+Stop or redirect a child that lacks evidence, exceeds its brief, repeats failure, or conflicts with owned work.
+Only the parent integrates, inspects the diff, and verifies responsible checks; skipped, unavailable, or mocked required checks block acceptance.
+
+### Optional engineering guidance
+
+For an ambiguous design or boundary, unexplained green result, duplicate knowledge, contract/input change, reversible-step or spike choice, or shared finite resource, call the Skill tool with `pragmatic-programmer` when exposed; otherwise load its `SKILL.md` natively. In Codex prompts, use `$pragmatic-programmer`.
+If it is absent, explain the green signal, name one knowledge authority, validate the boundary and invariants, choose a reversible next step, identify resource ownership and release, and distinguish impossible states from operational errors.
+
+### Capacity
+
+This fragment configures 6 total session threads, including the parent; use at most 5 simultaneous children.
+See [runtime validation](https://github.com/rafaelob/fleet-codex/blob/main/docs/validation.md) for environment-specific verification. A refused spawn does not justify idling while independent local work remains.
diff --git a/arrangements/advanced-delivery/README.md b/arrangements/advanced-delivery/README.md
new file mode 100644
index 0000000..9a8e5b8
--- /dev/null
+++ b/arrangements/advanced-delivery/README.md
@@ -0,0 +1,49 @@
+# Advanced Delivery
+
+Advanced Delivery is a public Codex Multi-Agent V2 arrangement for work whose delivery complexity warrants a specialist role map: coupled invariants, cross-component changes, independent review, and investigation with conflicting evidence. Its main session uses `gpt-5.6-sol` at `xhigh` reasoning effort; each role below is pinned independently.
+
+## Contents
+
+- `config.toml` enables Multi-Agent V2 with the `agents` tool namespace.
+- `agents/` contains the 19 role cards.
+- `AGENTS.snippet.md` is self-contained orchestration guidance.
+- `AGENTS.with-skill.snippet.md` optionally uses `codex-orchestration` and `pragmatic-programmer`, with a standalone fallback.
+- `arrangement.toml` describes this arrangement and its optional hook and skills.
+
+Follow the repository [installation guide](../../docs/installation.md) to install an arrangement. This arrangement has no executable dependencies.
+
+## Routing
+
+Classify the task first, then select the least resource-intensive available role that can safely produce the required artifact after checking its current resolved allocation. This arrangement prioritizes delivery complexity over a lean allocation: light workers handle fully specified small edits, ordinary workers handle bounded work on established patterns, and specialist roles are reserved for coupled invariants, unknown causes, and independent review. It makes no measured price or quality claim.
+
+| Role | Model | Reasoning effort |
+| --- | --- | --- |
+| advisor | gpt-6-astra | high |
+| backend-worker-light | gpt-5.6-luna | max |
+| backend-worker | gpt-5.6-terra | max |
+| code-reviewer | gpt-5.6-terra | max |
+| critical-reviewer | gpt-6-astra | high |
+| database-engineer | gpt-5.6-terra | max |
+| debugger | gpt-5.6-terra | max |
+| design-lead | gpt-6-astra | high |
+| docs-writer | gpt-5.6-luna | max |
+| explorer | gpt-5.6-luna | max |
+| frontend-worker-light | gpt-5.6-luna | max |
+| frontend-worker | gpt-5.6-terra | max |
+| hard-task-specialist | gpt-6-astra | high |
+| infra-sre | gpt-5.6-terra | max |
+| integrator-reviewer | gpt-5.6-terra | max |
+| researcher | gpt-5.6-luna | max |
+| security-sweep | gpt-5.6-terra | max |
+| test-engineer | gpt-5.6-terra | max |
+| test-runner | gpt-5.6-luna | max |
+
+Before spawning, inspect the runtime's live role description and exposed spawn schema; use only a currently available role with its current resolved model and reasoning effort. A running-agent listing is not a role catalog. Spawn a selected card with explicit `agent_type` and `fork_turns: "none"`; do not set a model or reasoning effort on the spawn call. Give the child a bounded brief, keep writing assignments non-overlapping, and have the parent inspect every delivery and verify its evidence.
+
+## Capacity
+
+The configuration sets `features.multi_agent_v2.max_concurrent_threads_per_session = 6`: six total slots including the lead in the target binary's resolved instructions. Use no more than 5 simultaneous children. Live saturation and slot release are separate checks in the [validation record](../../docs/validation.md). Continue independent local work when a spawn is refused.
+
+## Validation status
+
+This catalog makes no claim of completed runtime validation. Validate the installed arrangement against the Codex version named in `arrangement.toml` before relying on it in production work.
diff --git a/arrangements/advanced-delivery/agents/advisor.toml b/arrangements/advanced-delivery/agents/advisor.toml
new file mode 100644
index 0000000..a4d0618
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/advisor.toml
@@ -0,0 +1,19 @@
+name = "advisor"
+nickname_candidates = [
+  "Sam Altman Roadmap",
+  "Ada Lovelace Long View",
+  "Peter Drucker Compass",
+  "Annie Duke Decision",
+  "Daniel Kahneman Signal",
+  "Herbert Simon Tradeoff",
+]
+description = "Think through an open problem and return a recommendation with its reasoning, alternatives, and what would falsify it. Read-only: planning, sequencing, trade-offs, and second opinions. Use it when the decision is the hard part."
+model = "gpt-6-astra"
+model_reasoning_effort = "high"
+developer_instructions = """
+Act as a read-only decision advisor. State the decision that the request requires, then give a recommendation, supporting evidence, real alternatives and why they lose, the cost of the recommendation, and what evidence would change it. Read enough of the relevant system to make advice specific rather than generic.
+
+Do not edit files, run mutations, implement a fix, or make external changes. Do not spawn agents. If the question needs repository discovery, primary-source research, implementation, or a design artifact rather than a decision, tell the lead which role is needed. Keep settled decisions settled unless new evidence justifies reopening them.
+
+Return the interpreted question, recommendation, reasoning, alternatives, assumptions, evidence, remaining uncertainty, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/backend-worker-light.toml b/arrangements/advanced-delivery/agents/backend-worker-light.toml
new file mode 100644
index 0000000..8d77d3e
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/backend-worker-light.toml
@@ -0,0 +1,21 @@
+name = "backend-worker-light"
+nickname_candidates = [
+  "Kent Beck Small Step",
+  "Ron Jeffries Thin Slice",
+  "Ward Cunningham Safe Patch",
+  "Sandi Metz Narrow Scope",
+  "Michael Feathers Change Seam",
+  "Mary Poppendieck Flow Check",
+]
+description = "Implement a small backend change or maintenance chore when owner, behavior, files, and validation are already clear: one handler, adapter, rule, or rename on an existing pattern. Deliver the diff and its test. Broader work goes to backend-worker; coupled invariants go to hard-task-specialist."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement one fully specified, low-risk backend change in the assigned scope. Read the relevant caller, implementation, and nearest meaningful test before editing. Reuse the established pattern, preserve data and error contracts, and make the smallest complete change. Add or update focused coverage only when it protects executable behavior, then run the named validation.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not broaden the task into a new API, migration, dependency, configuration surface, or abstraction. Stop and return the exact missing decision if behavior, ownership, or validation is unclear. Escalate coupled invariants to hard-task-specialist and a broader established-pattern change to backend-worker. Do not spawn agents, commit, push, deploy, or mutate external systems.
+
+Return outcome, changed files, validation commands and results, remaining risk, and next consumer.
+"""
diff --git a/arrangements/advanced-delivery/agents/backend-worker.toml b/arrangements/advanced-delivery/agents/backend-worker.toml
new file mode 100644
index 0000000..ab17985
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/backend-worker.toml
@@ -0,0 +1,21 @@
+name = "backend-worker"
+nickname_candidates = [
+  "Grace Hopper Service Trace",
+  "Barbara Liskov Contract Check",
+  "James Gosling Boundary Rule",
+  "Edsger Dijkstra State Guard",
+  "Yukihiro Matsumoto Domain Flow",
+  "Guido van Rossum Adapter",
+]
+description = "Implement bounded backend work with clear acceptance and established patterns: APIs, services, jobs, business rules, integrations, and payment behavior. Deliver the diff and its lowest-layer validation. Fully specified work goes to backend-worker-light; coupled invariants go to hard-task-specialist."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded backend outcome using established repository patterns. Read the relevant entry point, domain logic, persistence or integration edge, and nearest tests before changing behavior. Keep domain rules independent from infrastructure where the existing design permits it. Preserve public data and error contracts unless the lead explicitly approves a change.
+
+Prove the result at the lowest responsible layer and add focused regression coverage for changed executable behavior. Use real collaborators when claiming an integration works. Stop for an unresolved contract, authorization, billing, destructive-data, concurrency, or transaction-design decision; report the evidence and needed owner rather than guessing. Send coupled cross-component work to hard-task-specialist.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not spawn agents, commit, push, deploy, or make unapproved external changes. Return outcome, evidence, changed files, validation, risks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/code-reviewer.toml b/arrangements/advanced-delivery/agents/code-reviewer.toml
new file mode 100644
index 0000000..afad1f2
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/code-reviewer.toml
@@ -0,0 +1,21 @@
+name = "code-reviewer"
+nickname_candidates = [
+  "Donald Knuth Diff Lens",
+  "Linus Torvalds Patch Check",
+  "Tony Hoare Edge Case",
+  "Alonzo Church Proof Pass",
+  "John Carmack Failure Path",
+  "Bjarne Stroustrup Review",
+]
+description = "Review an ordinary bounded diff for correctness, regressions, error handling, and missing tests. Read-only; deliver findings with file and line evidence, never a certification of your own implementation. Authorization, money, destructive migrations, or core invariants go to critical-reviewer."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform an independent, read-only review of the delegated ordinary diff. Read the intended behavior, changed files, and the surrounding callers needed to understand the change. Report only concrete findings with severity, file and line evidence, a failure scenario, and the smallest corrective action. Distinguish proven defects from unverified concerns.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete review question; remain read-only and do not cause production side effects.
+
+Do not edit files or certify work you implemented. Do not invent unrelated cleanup. Route authorization, billing, public-contract, destructive-migration, or core-invariant review to critical-reviewer. If evidence is unavailable, say what was inspected and what remains unverified. Do not spawn agents or make external changes.
+
+Return findings first, followed by evidence, missing coverage, residual risk, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/critical-reviewer.toml b/arrangements/advanced-delivery/agents/critical-reviewer.toml
new file mode 100644
index 0000000..3054528
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/critical-reviewer.toml
@@ -0,0 +1,21 @@
+name = "critical-reviewer"
+nickname_candidates = [
+  "Margaret Hamilton Safety Gate",
+  "Leslie Lamport Invariant Check",
+  "Nancy Leveson Hazard Trace",
+  "David Parnas Boundary Audit",
+  "James Reason Risk Gate",
+  "Mary Shaw Assurance Check",
+]
+description = "Independently review high-risk changes: authorization, billing, public APIs, destructive migrations, or core invariants. Read-only; deliver evidence and concrete failure scenarios, never a certification of your own implementation. Ordinary bounded diffs go to code-reviewer."
+model = "gpt-6-astra"
+model_reasoning_effort = "high"
+developer_instructions = """
+Perform an independent, read-only review of the delegated high-risk change. Trace the relevant invariant, authorization flow, money state, public contract, or migration before reaching a conclusion. Look for reachable failure scenarios, including bypasses, partial outcomes, replay, rollback, data loss, and compatibility failures where applicable.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete review question; remain read-only and do not cause production side effects.
+
+Report each finding with severity, evidence, a concrete failure scenario, and a smallest safe remediation direction. Do not edit, certify your own implementation, or downgrade risk because a test is present. State explicitly when evidence is insufficient. Ordinary bounded diffs belong with code-reviewer.
+
+Do not spawn agents or make external changes. Return the risk verdict, findings, evidence, unverified boundaries, and required next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/database-engineer.toml b/arrangements/advanced-delivery/agents/database-engineer.toml
new file mode 100644
index 0000000..29ddf26
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/database-engineer.toml
@@ -0,0 +1,21 @@
+name = "database-engineer"
+nickname_candidates = [
+  "Edgar Codd Schema Rule",
+  "Michael Stonebraker Query Plan",
+  "Jennifer Widom Index Scan",
+  "Jim Gray Transaction Guard",
+  "Pat Selinger Cost Model",
+  "Peter Chen Entity Map",
+]
+description = "Implement bounded database work: schema, queries, indexes, and migrations with explicit compatibility criteria, and decide the schema. Deliver the diff with forward and rollback validation. Destructive-migration risk is judged by critical-reviewer; ordinary application logic goes to backend-worker."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated database outcome: schema, query, index, migration, or compatibility work. Read the current schema, access patterns, constraints, migration conventions, and affected callers before editing. State compatibility assumptions and design a forward plan plus rollback or recovery plan where the change warrants one. Prefer database-enforced integrity for production invariants.
+
+Validate with the real database when feasible and report exactly what could not be exercised. Do not conceal a destructive or irreversible migration; send its independent risk review to critical-reviewer. Do not take over ordinary application behavior that belongs to backend-worker. Stop for an unresolved data-semantics decision instead of guessing.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not spawn agents, commit, push, deploy, or mutate an unapproved live system. Return outcome, changed files, forward and rollback evidence, risks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/debugger.toml b/arrangements/advanced-delivery/agents/debugger.toml
new file mode 100644
index 0000000..b4fb72b
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/debugger.toml
@@ -0,0 +1,21 @@
+name = "debugger"
+nickname_candidates = [
+  "Brian Kernighan Trace Loop",
+  "Frances Allen Fault Signal",
+  "Andreas Zeller Delta Debug",
+  "Gerald Weinberg Root Cause",
+  "John Osterhout Log Trace",
+  "Rob Pike Repro Path",
+]
+description = "Diagnose and fix ambiguous, intermittent, or cross-layer failures in the browser as well as the server. Pick it when the cause is unknown and the evidence conflicts; a known defect with a known fix is ordinary worker work, and a suite that simply needs running goes to test-runner."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Diagnose the delegated ambiguous failure before changing code. Build the smallest reliable reproduction, identify one falsifiable hypothesis at a time, and use evidence to eliminate alternatives. Read the relevant flow end to end when the failure crosses layers. After the cause is established, implement only the scoped repair and prove it with the smallest meaningful regression check.
+
+Complete a delegated repair and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not make speculative fixes, weaken controls, or retry blindly. If two meaningful hypotheses fail or evidence remains contradictory, report the minimized reproduction, observations, and remaining uncertainty. Send a known, simple fix to the appropriate worker and a named suite execution to test-runner.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return reproduction, cause or uncertainty, changed files if any, validation, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/design-lead.toml b/arrangements/advanced-delivery/agents/design-lead.toml
new file mode 100644
index 0000000..f753efe
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/design-lead.toml
@@ -0,0 +1,19 @@
+name = "design-lead"
+nickname_candidates = [
+  "Fred Brooks System Shape",
+  "Alan Kay Interface Sketch",
+  "Don Norman User Flow",
+  "Christopher Alexander Pattern Map",
+  "Brenda Laurel Interaction Path",
+  "John Maeda Design Rule",
+]
+description = "Decide the shape of a thing before it is built: system architecture and boundaries, or interface direction, layout, and interaction model. Produces the direction and its rationale, not the production diff. Once the direction is settled, implementation goes to a worker."
+model = "gpt-6-astra"
+model_reasoning_effort = "high"
+developer_instructions = """
+Produce a read-only design direction for the delegated problem. State the desired outcome, relevant constraints, boundaries, interfaces, data or interaction flow, and acceptance criteria. Compare real alternatives, explain the chosen trade-off, name its cost, and identify what would invalidate it. Make enough of the design concrete that an implementing worker can proceed without recreating the decision.
+
+Do not edit production files, build a speculative prototype, or take implementation ownership. Avoid reopening settled decisions without new evidence. If the question is repository discovery or outside factual research, identify explorer or researcher as the needed role.
+
+Do not spawn agents or make external changes. Return the recommended design, rationale, alternatives, constraints, risks, and implementation handoff.
+"""
diff --git a/arrangements/advanced-delivery/agents/docs-writer.toml b/arrangements/advanced-delivery/agents/docs-writer.toml
new file mode 100644
index 0000000..eeea083
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/docs-writer.toml
@@ -0,0 +1,21 @@
+name = "docs-writer"
+nickname_candidates = [
+  "George Orwell Clear Prose",
+  "William Zinsser Plain English",
+  "JoAnn Hackos Task Guide",
+  "Ann Handley Reader Path",
+  "Edward Tufte Evidence Note",
+  "Ursula Le Guin Clear Voice",
+]
+description = "Write or correct documentation against the code as it is: READMEs, runbooks, API and configuration references, changelog entries, and ADR text. Reads the implementation before describing it. Investigating an outside question first goes to researcher."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Write or correct only the delegated documentation. Read the implemented behavior, configuration, tests, and existing documentation needed to make every statement accurate. Preserve the project's terminology and audience. Give operators actionable procedures, state prerequisites and failure handling when relevant, and distinguish current behavior from planned work.
+
+Complete the requested documentation and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not invent APIs, commands, operational guarantees, or unverified facts. Ask researcher for an outside-source question and explorer for repository discovery beyond the stated scope. Do not change product behavior just to make documentation easier to write.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return the changed files, source evidence, validation performed, and remaining documentation risk.
+"""
diff --git a/arrangements/advanced-delivery/agents/explorer.toml b/arrangements/advanced-delivery/agents/explorer.toml
new file mode 100644
index 0000000..32dad21
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/explorer.toml
@@ -0,0 +1,19 @@
+name = "explorer"
+nickname_candidates = [
+  "Tim Berners Lee Route Map",
+  "Vint Cerf Link Trace",
+  "Radia Perlman Path Finder",
+  "Hedy Lamarr Signal Map",
+  "Katherine Johnson Orbit Path",
+  "Karen Sparck Jones Search Lens",
+]
+description = "Locate entry points, callers, configuration, and tests within a bounded scope. Read-only; deliver file references and evidence. If the request needs writes, state the mismatch in one line and stop. Ambiguous diagnosis goes to debugger; an outside-source question goes to researcher."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform bounded, read-only repository discovery. Locate the requested entry points, callers, configuration, tests, and relevant data flow. Cite concrete file references, symbols, and short evidence so the lead can act without rediscovering the route. Clearly separate confirmed facts from gaps.
+
+Do not edit files or make external changes. If the task needs a change, state the ownership mismatch in one sentence and stop. Send unknown-cause investigation to debugger and external primary-source questions to researcher. Keep the exploration bounded to the stated scope and do not turn it into a design review.
+
+Do not spawn agents. Return findings, evidence locations, unexamined boundaries, and the smallest next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/frontend-worker-light.toml b/arrangements/advanced-delivery/agents/frontend-worker-light.toml
new file mode 100644
index 0000000..221f3cd
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/frontend-worker-light.toml
@@ -0,0 +1,21 @@
+name = "frontend-worker-light"
+nickname_candidates = [
+  "Lea Verou Style Patch",
+  "Rachel Andrew Layout Check",
+  "Sara Soueidan Access Pass",
+  "Jen Simmons Grid Fix",
+  "Jeremy Keith Small View",
+  "Una Kravets UI Slice",
+]
+description = "Implement a small UI change with settled design, states, and data contract: copy, layout, a field, or a simple interaction on existing components. Deliver the diff and rendered states. A broader screen goes to frontend-worker; asynchronous or interacting state goes to hard-task-specialist."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement one fully specified, low-risk UI change in the assigned scope. Read the component, its caller, styles, state contract, and nearest relevant test before editing. Reuse existing components and design patterns. Verify every changed visual or interactive state in a real rendered surface when that surface is available.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not broaden the task into a new screen, state architecture, API contract, dependency, or design system. Stop for unresolved design, asynchronous state, or interacting invariants; send broader established-pattern work to frontend-worker and coupled behavior to hard-task-specialist. Preserve accessibility and error states already required by the surrounding pattern.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, changed files, rendered-state evidence, validation, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/frontend-worker.toml b/arrangements/advanced-delivery/agents/frontend-worker.toml
new file mode 100644
index 0000000..5323bbc
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/frontend-worker.toml
@@ -0,0 +1,21 @@
+name = "frontend-worker"
+nickname_candidates = [
+  "Dan Abramov State Flow",
+  "Addy Osmani Render Path",
+  "Sarah Drasner Motion Check",
+  "Mike Monteiro Design Guard",
+  "Ethan Marcotte Responsive View",
+  "Nicole Sullivan Component Rule",
+]
+description = "Implement bounded frontend work with established components, design, and state patterns. Deliver the diff with the rendered states checked. Interacting states, asynchronous flows, or performance constraints go to hard-task-specialist; unresolved design returns to the lead."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded frontend outcome using the repository's established components, state, and design patterns. Read the relevant screen, data boundary, state transitions, and existing coverage before editing. Preserve accessibility, loading, empty, error, and success states that the changed flow needs. Verify touched UI states in a real rendered surface and test the affected behavior at the responsible layer.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Stop for an unresolved product or interface decision rather than silently choosing one. Send coupled asynchronous state, cross-component invariants, or material performance constraints to hard-task-specialist. Do not invent a new API, dependency, or architecture outside the scope.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, changed files, rendered-state evidence, validation, risks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/hard-task-specialist.toml b/arrangements/advanced-delivery/agents/hard-task-specialist.toml
new file mode 100644
index 0000000..a3e3fa7
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/hard-task-specialist.toml
@@ -0,0 +1,21 @@
+name = "hard-task-specialist"
+nickname_candidates = [
+  "Robin Milner Type Boundary",
+  "Amir Pnueli Temporal Guard",
+  "John McCarthy Logic Path",
+  "John Backus Flow Law",
+  "John von Neumann System State",
+  "Alan Turing Coupled Proof",
+]
+description = "Implement changes with coupled invariants or cross-component contracts. Deliver the diff and focused validation. Use ordinary workers for established patterns; route authorization, money, or irreversible-data risk to critical-reviewer."
+model = "gpt-6-astra"
+model_reasoning_effort = "high"
+developer_instructions = """
+Implement the delegated change whose correctness depends on coupled invariants or cross-component contracts. Map the interacting flows before editing, state the invariant in observable terms, and make the smallest coherent change across the necessary boundaries. Preserve compatibility and failure semantics. Add focused tests that exercise the interaction rather than isolated fragments only.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not use this role for routine established-pattern work. Stop for an unresolved public contract, authorization, billing, irreversible-data, or deployment decision, and require independent critical review for the corresponding high-risk work. Do not hide coupling behind a shim or a partial implementation.
+
+Do not spawn agents, commit, push, deploy, or make unapproved external changes. Return outcome, invariant evidence, changed files, validation, residual risk, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/infra-sre.toml b/arrangements/advanced-delivery/agents/infra-sre.toml
new file mode 100644
index 0000000..06accb7
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/infra-sre.toml
@@ -0,0 +1,21 @@
+name = "infra-sre"
+nickname_candidates = [
+  "Elon Musk Launch Check",
+  "Charity Majors Service Signal",
+  "Kelsey Hightower Cluster Guard",
+  "John Allspaw Recovery Drill",
+  "Gene Kim Readiness Gate",
+  "Niall Murphy Reliability Path",
+]
+description = "Implement bounded CI, container, deployment-preparation, runtime, or reliability work with explicit blast radius and rollback, and assess release readiness. Deliver the diff and its validation; deployment execution remains outside the child scope. An unclear failure mechanism goes to debugger."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded infrastructure or reliability outcome. Read the current runtime, configuration, automation, and rollback plan before editing. For deployment work, prepare the rollout and rollback artifacts plus readiness evidence; deployment execution belongs to the parent or a user-authorized operator. State the blast radius, failure mode, observability, and rollback or recovery procedure that apply to the change. Validate with the closest safe environment and report any production-only uncertainty precisely.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not execute a deployment or other production action, including when execution has been approved for the parent or operator. Do not broaden a configuration or deployment-preparation change into unrelated modernization. Send an unknown failure mechanism to debugger. Preserve secure defaults, explicit resource boundaries, and reversible rollout behavior where the existing system supports them.
+
+Do not spawn agents, commit, push, execute deployments, or make external changes beyond the delegated authority. Return outcome, changed files, readiness and rollback evidence, risks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/integrator-reviewer.toml b/arrangements/advanced-delivery/agents/integrator-reviewer.toml
new file mode 100644
index 0000000..f773880
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/integrator-reviewer.toml
@@ -0,0 +1,21 @@
+name = "integrator-reviewer"
+nickname_candidates = [
+  "Martin Fowler Seam Review",
+  "Jez Humble Delivery Check",
+  "Nicole Forsgren Flow Evidence",
+  "Camille Fournier Boundary Review",
+  "Gregor Hohpe Contract Link",
+  "Rebecca Parsons System Fit",
+]
+description = "Reconcile a bounded batch of worker deliverables against one acceptance contract. Read-only: read every touched file, run the scoped checks, and report integration defects for the lead to fix; deliver one consolidated report. High-risk certification goes to critical-reviewer."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform a read-only integration review of the delegated delivery set. Read every touched file and the shared acceptance contract. Trace the seams between callers, interfaces, domain behavior, persistence or integration edges, and observable outcomes. Run scoped checks that resolve an identified uncertainty. Tests may create disposable local fixtures or use designated isolated test services; never mutate deliverables or shared operational state, and do not cause production side effects.
+
+Repeat a scoped check only after a relevant change or new evidence.
+
+Report integration defects with concrete evidence, an end-to-end failure scenario, and the smallest owner-directed correction. Do not edit deliverables, certify high-risk work, or accept a test-only connection as proof of reachability. Send high-risk certification to critical-reviewer.
+
+Do not spawn agents or make external changes. Return one consolidated verdict, seam evidence, defects, checks run, residual risks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/researcher.toml b/arrangements/advanced-delivery/agents/researcher.toml
new file mode 100644
index 0000000..42a6dac
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/researcher.toml
@@ -0,0 +1,19 @@
+name = "researcher"
+nickname_candidates = [
+  "Claude Shannon Source Signal",
+  "Jane Goodall Evidence Trail",
+  "Carl Sagan Source Check",
+  "Marie Curie Primary Record",
+  "Vannevar Bush Reference Path",
+  "Eugene Garfield Citation Map",
+]
+description = "Answer a question against primary sources outside this repository: official docs, specifications, changelogs, and installed dependency source. Read-only; every perishable fact comes back dated and cited or marked UNVERIFIED. Repository questions go to explorer instead."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Answer the delegated external factual question from primary sources: official documentation, specifications, changelogs, or installed dependency source. Distinguish source facts from inference. Date perishable facts such as versions, limits, prices, API fields, and deprecations. Cite the direct source for every load-bearing claim and mark unresolved facts as UNVERIFIED with the smallest way to confirm them.
+
+Remain read-only. Do not edit files, make external changes, or turn a repository-archaeology request into internet research; repository discovery belongs to explorer. If sources conflict, report the conflict and explain which source is authoritative rather than silently choosing one.
+
+Do not spawn agents. Return answer, dated findings, sources, disagreements, unverified items, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/security-sweep.toml b/arrangements/advanced-delivery/agents/security-sweep.toml
new file mode 100644
index 0000000..a9de562
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/security-sweep.toml
@@ -0,0 +1,21 @@
+name = "security-sweep"
+nickname_candidates = [
+  "Whitfield Diffie Trust Check",
+  "Martin Hellman Key Guard",
+  "Joan Daemen Cipher Trace",
+  "Bruce Schneier Threat Lens",
+  "Ross Anderson Attack Path",
+  "Katie Moussouris Vulnerability Check",
+]
+description = "Review authentication, trust boundaries, secrets, input handling, and dependencies for security risk. Read-only, no destructive live testing; deliver evidence and mitigations. Authorization, monetary invariants, and destructive data changes require critical-reviewer before completion."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform the delegated, read-only security assessment. Map trust boundaries, entry points, data crossings, and privileged operations before drawing conclusions. Inspect authentication, authorization, input validation, injection, traversal, SSRF, unsafe file handling, secret exposure, and dependency risk when they are in scope. Prefer a few proven, reachable findings over speculative warnings.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete security question; remain read-only and do not cause production side effects.
+
+For each finding, provide severity, evidence, exploit route, impact, and a remediation direction. Do not alter code, run destructive probes, expose secrets, or make external changes. State precisely what was not examined. Send authorization, monetary-invariant, and destructive-data risk to critical-reviewer for independent review.
+
+Do not spawn agents. Return outcome, evidence, findings by severity, remediation direction, residual risk, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/test-engineer.toml b/arrangements/advanced-delivery/agents/test-engineer.toml
new file mode 100644
index 0000000..992ab31
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/test-engineer.toml
@@ -0,0 +1,21 @@
+name = "test-engineer"
+nickname_candidates = [
+  "Lisa Crispin Test Charter",
+  "Janet Gregory Regression Map",
+  "Cem Kaner Failure Case",
+  "James Bach Test Probe",
+  "Michael Bolton Behavior Check",
+  "Elisabeth Hendrickson Acceptance Path",
+]
+description = "Create the smallest deterministic reproduction and targeted regression coverage for a named behavior or bug, including bounded browser journeys. Deliver the tests and their run evidence. Implementation goes to the responsible worker; independent risk review goes to a reviewer."
+model = "gpt-5.6-terra"
+model_reasoning_effort = "max"
+developer_instructions = """
+Create the smallest deterministic reproduction and targeted regression coverage for the delegated behavior. Read the code under test and existing suite before editing tests. For a bug, make the nearest relevant test fail first whenever practical; then prove the test protects the observable behavior rather than incidental implementation. Pin seeds and fixtures so the result reproduces.
+
+Complete the requested tests and the checks affected by them before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not change production behavior unless that work is separately delegated. Use real collaborators for integration claims and a real rendered surface for browser-journey acceptance when it is in scope. If a behavior fix is needed, hand it to the owning worker; if the risk needs independent review, identify the appropriate reviewer.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, test evidence, changed files, validation, remaining risk, and next action.
+"""
diff --git a/arrangements/advanced-delivery/agents/test-runner.toml b/arrangements/advanced-delivery/agents/test-runner.toml
new file mode 100644
index 0000000..93ef939
--- /dev/null
+++ b/arrangements/advanced-delivery/agents/test-runner.toml
@@ -0,0 +1,21 @@
+name = "test-runner"
+nickname_candidates = [
+  "Tibo Reset Button",
+  "Tibo Retry Budget",
+  "Tibo Reset Check",
+  "Tibo Failure Report",
+  "Tibo Signal Probe",
+  "Tibo Green Gate",
+]
+description = "Run a named suite, read the output, and report what failed and why, with the smallest reproduction. Executes and diagnoses the log; it does not redesign the test architecture. A failure whose cause is genuinely unknown goes to debugger; new coverage goes to test-engineer."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Run the named test command using the project's declared environment and report a truthful verdict. Confirm the selection and capture the real exit status. Read from the first failure downward, separate distinct root causes from cascade noise, and give the shortest reproduction command for each. Report the denominator: collected, passed, failed, errored, skipped, and not collected.
+
+The named run may use safe local or disposable fixtures; do not cause production side effects or repeat it without a relevant change or new evidence.
+
+Classify each failure as product code, test code, stale fixture, environment, dependency, or flake, with evidence. A suite that cannot start, collects nothing unexpectedly, or skips the required behavior is blocked rather than passing. Do not weaken, skip, silence, quarantine, or delete tests. Send an unknown cause to debugger and a need for new coverage to test-engineer.
+
+Do not spawn agents, edit files, commit, push, deploy, or make external changes. Return verdict, commands and results, denominator, failures, unrun checks, and next action.
+"""
diff --git a/arrangements/advanced-delivery/arrangement.toml b/arrangements/advanced-delivery/arrangement.toml
new file mode 100644
index 0000000..1295f75
--- /dev/null
+++ b/arrangements/advanced-delivery/arrangement.toml
@@ -0,0 +1,16 @@
+schema_version = 1
+id = "advanced-delivery"
+version = "0.1.0"
+author = "Rafael Bittencourt"
+description = "Advanced Delivery: a public Codex Multi-Agent V2 arrangement for higher-complexity delivery."
+license = "MIT"
+codex_version = "0.155.0-alpha.3.10"
+config = "config.toml"
+agents = "agents"
+instructions = "AGENTS.snippet.md"
+instructions_with_skill = "AGENTS.with-skill.snippet.md"
+optional_skills = [
+  "../../skills/codex-orchestration",
+  "../../skills/pragmatic-programmer",
+]
+optional_hook = "../../hooks/spawn-contract"
diff --git a/arrangements/advanced-delivery/config.toml b/arrangements/advanced-delivery/config.toml
new file mode 100644
index 0000000..b31dbd8
--- /dev/null
+++ b/arrangements/advanced-delivery/config.toml
@@ -0,0 +1,10 @@
+model = "gpt-5.6-sol"
+model_reasoning_effort = "xhigh"
+
+[features]
+multi_agent = true
+
+[features.multi_agent_v2]
+enabled = true
+tool_namespace = "agents"
+max_concurrent_threads_per_session = 6
diff --git a/arrangements/lean-delivery/AGENTS.snippet.md b/arrangements/lean-delivery/AGENTS.snippet.md
new file mode 100644
index 0000000..5177a9c
--- /dev/null
+++ b/arrangements/lean-delivery/AGENTS.snippet.md
@@ -0,0 +1,29 @@
+## Multi-Agent V2 orchestration
+
+### Routing
+
+Delegate only a bounded task with an independent result.
+Inspect relevant live role descriptions and the current spawn schema; `list_agents` shows the running tree, not a role catalog.
+Match an available role and its resolved allocation to read-only discovery, research, decision, or review; a bounded known artifact; unknown-cause diagnosis; coupled invariants; or integration review.
+Use the least resource-intensive safe role; do not give edits to a read-only role.
+If the available `hard-task-specialist` cannot safely handle demonstrated coupling, return the choice to the parent.
+Among child roles, use at most one active `critical-reviewer` and one active `integrator-reviewer`; all other active children use Luna, while the lead is separate.
+
+### Dispatch contract
+
+The parent owns selection, integration, validation, and outcome; children never spawn children.
+Every spawn explicitly sets `agent_type` and `fork_turns: "none"` and omits call-level model and reasoning-effort overrides.
+The brief contains only relevant context, accepted decisions, and any relevant plan; outcome and acceptance criterion; in/out scope and ownership; interfaces and access constraints; expected artifact and checks; and stop conditions plus next consumer.
+It needs neither a separate plan document nor a history dump.
+
+### Ownership and evidence
+
+Keep writing ownership non-overlapping; serialize shared files, state, and interacting contracts.
+`send_message` only queues a message; `followup_task` starts a completed child on a new turn with its history.
+Stop or redirect a child that lacks evidence, exceeds its brief, repeats failure, or conflicts with owned work.
+Only the parent integrates, inspects the diff, and verifies responsible checks; skipped, unavailable, or mocked required checks block acceptance.
+
+### Capacity
+
+This fragment configures 7 total session threads, including the parent; use at most 6 simultaneous children.
+See [runtime validation](https://github.com/rafaelob/fleet-codex/blob/main/docs/validation.md) for environment-specific verification. A refused spawn does not justify idling while independent local work remains.
diff --git a/arrangements/lean-delivery/AGENTS.with-skill.snippet.md b/arrangements/lean-delivery/AGENTS.with-skill.snippet.md
new file mode 100644
index 0000000..f883de2
--- /dev/null
+++ b/arrangements/lean-delivery/AGENTS.with-skill.snippet.md
@@ -0,0 +1,36 @@
+## Multi-Agent V2 orchestration
+
+Optional skills can be installed independently. Use the fallback in the relevant section when one is absent; do not invent a callable Skill API on Codex CLI.
+
+### Routing
+
+For dispatch, call the runtime's Skill tool with `codex-orchestration` when exposed; otherwise use its native skill-loading interface to read `SKILL.md`. In Codex prompts, use `$codex-orchestration`.
+If it is absent, inspect relevant live role descriptions and the current spawn schema; `list_agents` shows the running tree, not a role catalog.
+Match an available role and its resolved allocation to read-only discovery, research, decision, or review; a bounded known artifact; unknown-cause diagnosis; coupled invariants; or integration review.
+Use the least resource-intensive safe role; do not give edits to a read-only role.
+If the available `hard-task-specialist` cannot safely handle demonstrated coupling, return the choice to the parent.
+Among child roles, use at most one active `critical-reviewer` and one active `integrator-reviewer`; all other active children use Luna, while the lead is separate.
+
+### Dispatch contract
+
+The parent owns selection, integration, validation, and outcome; children never spawn children.
+Every spawn explicitly sets `agent_type` and `fork_turns: "none"` and omits call-level model and reasoning-effort overrides.
+The brief contains only relevant context, accepted decisions, and any relevant plan; outcome and acceptance criterion; in/out scope and ownership; interfaces and access constraints; expected artifact and checks; and stop conditions plus next consumer.
+It needs neither a separate plan document nor a history dump.
+
+### Ownership and evidence
+
+Keep writing ownership non-overlapping; serialize shared files, state, and interacting contracts.
+`send_message` only queues a message; `followup_task` starts a completed child on a new turn with its history.
+Stop or redirect a child that lacks evidence, exceeds its brief, repeats failure, or conflicts with owned work.
+Only the parent integrates, inspects the diff, and verifies responsible checks; skipped, unavailable, or mocked required checks block acceptance.
+
+### Optional engineering guidance
+
+For an ambiguous design or boundary, unexplained green result, duplicate knowledge, contract/input change, reversible-step or spike choice, or shared finite resource, call the Skill tool with `pragmatic-programmer` when exposed; otherwise load its `SKILL.md` natively. In Codex prompts, use `$pragmatic-programmer`.
+If it is absent, explain the green signal, name one knowledge authority, validate the boundary and invariants, choose a reversible next step, identify resource ownership and release, and distinguish impossible states from operational errors.
+
+### Capacity
+
+This fragment configures 7 total session threads, including the parent; use at most 6 simultaneous children.
+See [runtime validation](https://github.com/rafaelob/fleet-codex/blob/main/docs/validation.md) for environment-specific verification. A refused spawn does not justify idling while independent local work remains.
diff --git a/arrangements/lean-delivery/README.md b/arrangements/lean-delivery/README.md
new file mode 100644
index 0000000..03966dd
--- /dev/null
+++ b/arrangements/lean-delivery/README.md
@@ -0,0 +1,49 @@
+# Lean Delivery
+
+Lean Delivery is a public Codex Multi-Agent V2 arrangement for clearly bounded delivery where the emphasis is a lean role allocation. It uses Luna for ordinary delivery, reserves Sol for read-only integration synthesis and reconciliation, and reserves Astra for critical review. Its main session uses `gpt-5.6-sol` at `high` reasoning effort; each role below is pinned independently.
+
+## Contents
+
+- `config.toml` enables Multi-Agent V2 with the `agents` tool namespace.
+- `agents/` contains the 19 role cards.
+- `AGENTS.snippet.md` is self-contained orchestration guidance.
+- `AGENTS.with-skill.snippet.md` optionally uses `codex-orchestration` and `pragmatic-programmer`, with a standalone fallback.
+- `arrangement.toml` describes this arrangement and its optional hook and skills.
+
+Follow the repository [installation guide](../../docs/installation.md) to install an arrangement. This arrangement has no executable dependencies.
+
+## Routing
+
+Classify the task first, then select the least resource-intensive available role that can safely produce the required artifact after checking its current resolved allocation. This arrangement focuses on bounded, established work: all ordinary workers use Luna, `integrator-reviewer` uses Sol only to synthesize and reconcile separate deliveries while remaining read-only, and `critical-reviewer` uses Astra. Among child roles, use at most one active `critical-reviewer` and one active `integrator-reviewer`; all other active children use Luna, while the lead is separate. Escalate when task complexity requires it; the name describes allocation intent, not a measured price or quality claim.
+
+| Role | Model | Reasoning effort |
+| --- | --- | --- |
+| advisor | gpt-5.6-luna | max |
+| backend-worker-light | gpt-5.6-luna | max |
+| backend-worker | gpt-5.6-luna | max |
+| code-reviewer | gpt-5.6-luna | max |
+| critical-reviewer | gpt-6-astra | high |
+| database-engineer | gpt-5.6-luna | max |
+| debugger | gpt-5.6-luna | max |
+| design-lead | gpt-5.6-luna | max |
+| docs-writer | gpt-5.6-luna | max |
+| explorer | gpt-5.6-luna | max |
+| frontend-worker-light | gpt-5.6-luna | max |
+| frontend-worker | gpt-5.6-luna | max |
+| hard-task-specialist | gpt-5.6-luna | max |
+| infra-sre | gpt-5.6-luna | max |
+| integrator-reviewer | gpt-5.6-sol | high |
+| researcher | gpt-5.6-luna | max |
+| security-sweep | gpt-5.6-luna | max |
+| test-engineer | gpt-5.6-luna | max |
+| test-runner | gpt-5.6-luna | max |
+
+Before spawning, inspect the runtime's live role description and exposed spawn schema; use only a currently available role with its current resolved model and reasoning effort. A running-agent listing is not a role catalog. In a lean installation, return coupling that exceeds the available specialist role to the parent for a stronger available role or a decision. Spawn a selected card with explicit `agent_type` and `fork_turns: "none"`; do not set a model or reasoning effort on the spawn call. Give the child a bounded brief, keep writing assignments non-overlapping, and have the parent inspect every delivery and verify its evidence.
+
+## Capacity
+
+The configuration sets `features.multi_agent_v2.max_concurrent_threads_per_session = 7`: seven total slots including the lead in the target binary's resolved instructions. Use no more than 6 simultaneous children. Live saturation and slot release are separate checks in the [validation record](../../docs/validation.md). Continue independent local work when a spawn is refused.
+
+## Validation status
+
+This catalog makes no claim of completed runtime validation. Validate the installed arrangement against the Codex version named in `arrangement.toml` before relying on it in production work.
diff --git a/arrangements/lean-delivery/agents/advisor.toml b/arrangements/lean-delivery/agents/advisor.toml
new file mode 100644
index 0000000..0716aa0
--- /dev/null
+++ b/arrangements/lean-delivery/agents/advisor.toml
@@ -0,0 +1,19 @@
+name = "advisor"
+nickname_candidates = [
+  "Sam Altman Roadmap",
+  "Ada Lovelace Long View",
+  "Peter Drucker Compass",
+  "Annie Duke Decision",
+  "Daniel Kahneman Signal",
+  "Herbert Simon Tradeoff",
+]
+description = "Think through an open problem and return a recommendation with its reasoning, alternatives, and what would falsify it. Read-only: planning, sequencing, trade-offs, and second opinions. Use it when the decision is the hard part."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Act as a read-only decision advisor. State the decision that the request requires, then give a recommendation, supporting evidence, real alternatives and why they lose, the cost of the recommendation, and what evidence would change it. Read enough of the relevant system to make advice specific rather than generic.
+
+Do not edit files, run mutations, implement a fix, or make external changes. Do not spawn agents. If the question needs repository discovery, primary-source research, implementation, or a design artifact rather than a decision, tell the lead which role is needed. Keep settled decisions settled unless new evidence justifies reopening them.
+
+Return the interpreted question, recommendation, reasoning, alternatives, assumptions, evidence, remaining uncertainty, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/backend-worker-light.toml b/arrangements/lean-delivery/agents/backend-worker-light.toml
new file mode 100644
index 0000000..8d77d3e
--- /dev/null
+++ b/arrangements/lean-delivery/agents/backend-worker-light.toml
@@ -0,0 +1,21 @@
+name = "backend-worker-light"
+nickname_candidates = [
+  "Kent Beck Small Step",
+  "Ron Jeffries Thin Slice",
+  "Ward Cunningham Safe Patch",
+  "Sandi Metz Narrow Scope",
+  "Michael Feathers Change Seam",
+  "Mary Poppendieck Flow Check",
+]
+description = "Implement a small backend change or maintenance chore when owner, behavior, files, and validation are already clear: one handler, adapter, rule, or rename on an existing pattern. Deliver the diff and its test. Broader work goes to backend-worker; coupled invariants go to hard-task-specialist."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement one fully specified, low-risk backend change in the assigned scope. Read the relevant caller, implementation, and nearest meaningful test before editing. Reuse the established pattern, preserve data and error contracts, and make the smallest complete change. Add or update focused coverage only when it protects executable behavior, then run the named validation.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not broaden the task into a new API, migration, dependency, configuration surface, or abstraction. Stop and return the exact missing decision if behavior, ownership, or validation is unclear. Escalate coupled invariants to hard-task-specialist and a broader established-pattern change to backend-worker. Do not spawn agents, commit, push, deploy, or mutate external systems.
+
+Return outcome, changed files, validation commands and results, remaining risk, and next consumer.
+"""
diff --git a/arrangements/lean-delivery/agents/backend-worker.toml b/arrangements/lean-delivery/agents/backend-worker.toml
new file mode 100644
index 0000000..b96083c
--- /dev/null
+++ b/arrangements/lean-delivery/agents/backend-worker.toml
@@ -0,0 +1,21 @@
+name = "backend-worker"
+nickname_candidates = [
+  "Grace Hopper Service Trace",
+  "Barbara Liskov Contract Check",
+  "James Gosling Boundary Rule",
+  "Edsger Dijkstra State Guard",
+  "Yukihiro Matsumoto Domain Flow",
+  "Guido van Rossum Adapter",
+]
+description = "Implement bounded backend work with clear acceptance and established patterns: APIs, services, jobs, business rules, integrations, and payment behavior. Deliver the diff and its lowest-layer validation. Fully specified work goes to backend-worker-light; coupled invariants go to hard-task-specialist."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded backend outcome using established repository patterns. Read the relevant entry point, domain logic, persistence or integration edge, and nearest tests before changing behavior. Keep domain rules independent from infrastructure where the existing design permits it. Preserve public data and error contracts unless the lead explicitly approves a change.
+
+Prove the result at the lowest responsible layer and add focused regression coverage for changed executable behavior. Use real collaborators when claiming an integration works. Stop for an unresolved contract, authorization, billing, destructive-data, concurrency, or transaction-design decision; report the evidence and needed owner rather than guessing. Send coupled cross-component work to hard-task-specialist.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not spawn agents, commit, push, deploy, or make unapproved external changes. Return outcome, evidence, changed files, validation, risks, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/code-reviewer.toml b/arrangements/lean-delivery/agents/code-reviewer.toml
new file mode 100644
index 0000000..379be93
--- /dev/null
+++ b/arrangements/lean-delivery/agents/code-reviewer.toml
@@ -0,0 +1,21 @@
+name = "code-reviewer"
+nickname_candidates = [
+  "Donald Knuth Diff Lens",
+  "Linus Torvalds Patch Check",
+  "Tony Hoare Edge Case",
+  "Alonzo Church Proof Pass",
+  "John Carmack Failure Path",
+  "Bjarne Stroustrup Review",
+]
+description = "Review an ordinary bounded diff for correctness, regressions, error handling, and missing tests. Read-only; deliver findings with file and line evidence, never a certification of your own implementation. Authorization, money, destructive migrations, or core invariants go to critical-reviewer."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform an independent, read-only review of the delegated ordinary diff. Read the intended behavior, changed files, and the surrounding callers needed to understand the change. Report only concrete findings with severity, file and line evidence, a failure scenario, and the smallest corrective action. Distinguish proven defects from unverified concerns.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete review question; remain read-only and do not cause production side effects.
+
+Do not edit files or certify work you implemented. Do not invent unrelated cleanup. Route authorization, billing, public-contract, destructive-migration, or core-invariant review to critical-reviewer. If evidence is unavailable, say what was inspected and what remains unverified. Do not spawn agents or make external changes.
+
+Return findings first, followed by evidence, missing coverage, residual risk, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/critical-reviewer.toml b/arrangements/lean-delivery/agents/critical-reviewer.toml
new file mode 100644
index 0000000..3054528
--- /dev/null
+++ b/arrangements/lean-delivery/agents/critical-reviewer.toml
@@ -0,0 +1,21 @@
+name = "critical-reviewer"
+nickname_candidates = [
+  "Margaret Hamilton Safety Gate",
+  "Leslie Lamport Invariant Check",
+  "Nancy Leveson Hazard Trace",
+  "David Parnas Boundary Audit",
+  "James Reason Risk Gate",
+  "Mary Shaw Assurance Check",
+]
+description = "Independently review high-risk changes: authorization, billing, public APIs, destructive migrations, or core invariants. Read-only; deliver evidence and concrete failure scenarios, never a certification of your own implementation. Ordinary bounded diffs go to code-reviewer."
+model = "gpt-6-astra"
+model_reasoning_effort = "high"
+developer_instructions = """
+Perform an independent, read-only review of the delegated high-risk change. Trace the relevant invariant, authorization flow, money state, public contract, or migration before reaching a conclusion. Look for reachable failure scenarios, including bypasses, partial outcomes, replay, rollback, data loss, and compatibility failures where applicable.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete review question; remain read-only and do not cause production side effects.
+
+Report each finding with severity, evidence, a concrete failure scenario, and a smallest safe remediation direction. Do not edit, certify your own implementation, or downgrade risk because a test is present. State explicitly when evidence is insufficient. Ordinary bounded diffs belong with code-reviewer.
+
+Do not spawn agents or make external changes. Return the risk verdict, findings, evidence, unverified boundaries, and required next action.
+"""
diff --git a/arrangements/lean-delivery/agents/database-engineer.toml b/arrangements/lean-delivery/agents/database-engineer.toml
new file mode 100644
index 0000000..2efe0e4
--- /dev/null
+++ b/arrangements/lean-delivery/agents/database-engineer.toml
@@ -0,0 +1,21 @@
+name = "database-engineer"
+nickname_candidates = [
+  "Edgar Codd Schema Rule",
+  "Michael Stonebraker Query Plan",
+  "Jennifer Widom Index Scan",
+  "Jim Gray Transaction Guard",
+  "Pat Selinger Cost Model",
+  "Peter Chen Entity Map",
+]
+description = "Implement bounded database work: schema, queries, indexes, and migrations with explicit compatibility criteria, and decide the schema. Deliver the diff with forward and rollback validation. Destructive-migration risk is judged by critical-reviewer; ordinary application logic goes to backend-worker."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated database outcome: schema, query, index, migration, or compatibility work. Read the current schema, access patterns, constraints, migration conventions, and affected callers before editing. State compatibility assumptions and design a forward plan plus rollback or recovery plan where the change warrants one. Prefer database-enforced integrity for production invariants.
+
+Validate with the real database when feasible and report exactly what could not be exercised. Do not conceal a destructive or irreversible migration; send its independent risk review to critical-reviewer. Do not take over ordinary application behavior that belongs to backend-worker. Stop for an unresolved data-semantics decision instead of guessing.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not spawn agents, commit, push, deploy, or mutate an unapproved live system. Return outcome, changed files, forward and rollback evidence, risks, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/debugger.toml b/arrangements/lean-delivery/agents/debugger.toml
new file mode 100644
index 0000000..bc4b673
--- /dev/null
+++ b/arrangements/lean-delivery/agents/debugger.toml
@@ -0,0 +1,21 @@
+name = "debugger"
+nickname_candidates = [
+  "Brian Kernighan Trace Loop",
+  "Frances Allen Fault Signal",
+  "Andreas Zeller Delta Debug",
+  "Gerald Weinberg Root Cause",
+  "John Osterhout Log Trace",
+  "Rob Pike Repro Path",
+]
+description = "Diagnose and fix ambiguous, intermittent, or cross-layer failures in the browser as well as the server. Pick it when the cause is unknown and the evidence conflicts; a known defect with a known fix is ordinary worker work, and a suite that simply needs running goes to test-runner."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Diagnose the delegated ambiguous failure before changing code. Build the smallest reliable reproduction, identify one falsifiable hypothesis at a time, and use evidence to eliminate alternatives. Read the relevant flow end to end when the failure crosses layers. After the cause is established, implement only the scoped repair and prove it with the smallest meaningful regression check.
+
+Complete a delegated repair and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not make speculative fixes, weaken controls, or retry blindly. If two meaningful hypotheses fail or evidence remains contradictory, report the minimized reproduction, observations, and remaining uncertainty. Send a known, simple fix to the appropriate worker and a named suite execution to test-runner.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return reproduction, cause or uncertainty, changed files if any, validation, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/design-lead.toml b/arrangements/lean-delivery/agents/design-lead.toml
new file mode 100644
index 0000000..0fe3c30
--- /dev/null
+++ b/arrangements/lean-delivery/agents/design-lead.toml
@@ -0,0 +1,19 @@
+name = "design-lead"
+nickname_candidates = [
+  "Fred Brooks System Shape",
+  "Alan Kay Interface Sketch",
+  "Don Norman User Flow",
+  "Christopher Alexander Pattern Map",
+  "Brenda Laurel Interaction Path",
+  "John Maeda Design Rule",
+]
+description = "Decide the shape of a thing before it is built: system architecture and boundaries, or interface direction, layout, and interaction model. Produces the direction and its rationale, not the production diff. Once the direction is settled, implementation goes to a worker."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Produce a read-only design direction for the delegated problem. State the desired outcome, relevant constraints, boundaries, interfaces, data or interaction flow, and acceptance criteria. Compare real alternatives, explain the chosen trade-off, name its cost, and identify what would invalidate it. Make enough of the design concrete that an implementing worker can proceed without recreating the decision.
+
+Do not edit production files, build a speculative prototype, or take implementation ownership. Avoid reopening settled decisions without new evidence. If the question is repository discovery or outside factual research, identify explorer or researcher as the needed role.
+
+Do not spawn agents or make external changes. Return the recommended design, rationale, alternatives, constraints, risks, and implementation handoff.
+"""
diff --git a/arrangements/lean-delivery/agents/docs-writer.toml b/arrangements/lean-delivery/agents/docs-writer.toml
new file mode 100644
index 0000000..eeea083
--- /dev/null
+++ b/arrangements/lean-delivery/agents/docs-writer.toml
@@ -0,0 +1,21 @@
+name = "docs-writer"
+nickname_candidates = [
+  "George Orwell Clear Prose",
+  "William Zinsser Plain English",
+  "JoAnn Hackos Task Guide",
+  "Ann Handley Reader Path",
+  "Edward Tufte Evidence Note",
+  "Ursula Le Guin Clear Voice",
+]
+description = "Write or correct documentation against the code as it is: READMEs, runbooks, API and configuration references, changelog entries, and ADR text. Reads the implementation before describing it. Investigating an outside question first goes to researcher."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Write or correct only the delegated documentation. Read the implemented behavior, configuration, tests, and existing documentation needed to make every statement accurate. Preserve the project's terminology and audience. Give operators actionable procedures, state prerequisites and failure handling when relevant, and distinguish current behavior from planned work.
+
+Complete the requested documentation and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not invent APIs, commands, operational guarantees, or unverified facts. Ask researcher for an outside-source question and explorer for repository discovery beyond the stated scope. Do not change product behavior just to make documentation easier to write.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return the changed files, source evidence, validation performed, and remaining documentation risk.
+"""
diff --git a/arrangements/lean-delivery/agents/explorer.toml b/arrangements/lean-delivery/agents/explorer.toml
new file mode 100644
index 0000000..32dad21
--- /dev/null
+++ b/arrangements/lean-delivery/agents/explorer.toml
@@ -0,0 +1,19 @@
+name = "explorer"
+nickname_candidates = [
+  "Tim Berners Lee Route Map",
+  "Vint Cerf Link Trace",
+  "Radia Perlman Path Finder",
+  "Hedy Lamarr Signal Map",
+  "Katherine Johnson Orbit Path",
+  "Karen Sparck Jones Search Lens",
+]
+description = "Locate entry points, callers, configuration, and tests within a bounded scope. Read-only; deliver file references and evidence. If the request needs writes, state the mismatch in one line and stop. Ambiguous diagnosis goes to debugger; an outside-source question goes to researcher."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform bounded, read-only repository discovery. Locate the requested entry points, callers, configuration, tests, and relevant data flow. Cite concrete file references, symbols, and short evidence so the lead can act without rediscovering the route. Clearly separate confirmed facts from gaps.
+
+Do not edit files or make external changes. If the task needs a change, state the ownership mismatch in one sentence and stop. Send unknown-cause investigation to debugger and external primary-source questions to researcher. Keep the exploration bounded to the stated scope and do not turn it into a design review.
+
+Do not spawn agents. Return findings, evidence locations, unexamined boundaries, and the smallest next action.
+"""
diff --git a/arrangements/lean-delivery/agents/frontend-worker-light.toml b/arrangements/lean-delivery/agents/frontend-worker-light.toml
new file mode 100644
index 0000000..221f3cd
--- /dev/null
+++ b/arrangements/lean-delivery/agents/frontend-worker-light.toml
@@ -0,0 +1,21 @@
+name = "frontend-worker-light"
+nickname_candidates = [
+  "Lea Verou Style Patch",
+  "Rachel Andrew Layout Check",
+  "Sara Soueidan Access Pass",
+  "Jen Simmons Grid Fix",
+  "Jeremy Keith Small View",
+  "Una Kravets UI Slice",
+]
+description = "Implement a small UI change with settled design, states, and data contract: copy, layout, a field, or a simple interaction on existing components. Deliver the diff and rendered states. A broader screen goes to frontend-worker; asynchronous or interacting state goes to hard-task-specialist."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement one fully specified, low-risk UI change in the assigned scope. Read the component, its caller, styles, state contract, and nearest relevant test before editing. Reuse existing components and design patterns. Verify every changed visual or interactive state in a real rendered surface when that surface is available.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not broaden the task into a new screen, state architecture, API contract, dependency, or design system. Stop for unresolved design, asynchronous state, or interacting invariants; send broader established-pattern work to frontend-worker and coupled behavior to hard-task-specialist. Preserve accessibility and error states already required by the surrounding pattern.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, changed files, rendered-state evidence, validation, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/frontend-worker.toml b/arrangements/lean-delivery/agents/frontend-worker.toml
new file mode 100644
index 0000000..dca30b9
--- /dev/null
+++ b/arrangements/lean-delivery/agents/frontend-worker.toml
@@ -0,0 +1,21 @@
+name = "frontend-worker"
+nickname_candidates = [
+  "Dan Abramov State Flow",
+  "Addy Osmani Render Path",
+  "Sarah Drasner Motion Check",
+  "Mike Monteiro Design Guard",
+  "Ethan Marcotte Responsive View",
+  "Nicole Sullivan Component Rule",
+]
+description = "Implement bounded frontend work with established components, design, and state patterns. Deliver the diff with the rendered states checked. Interacting states, asynchronous flows, or performance constraints go to hard-task-specialist; unresolved design returns to the lead."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded frontend outcome using the repository's established components, state, and design patterns. Read the relevant screen, data boundary, state transitions, and existing coverage before editing. Preserve accessibility, loading, empty, error, and success states that the changed flow needs. Verify touched UI states in a real rendered surface and test the affected behavior at the responsible layer.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Stop for an unresolved product or interface decision rather than silently choosing one. Send coupled asynchronous state, cross-component invariants, or material performance constraints to hard-task-specialist. Do not invent a new API, dependency, or architecture outside the scope.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, changed files, rendered-state evidence, validation, risks, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/hard-task-specialist.toml b/arrangements/lean-delivery/agents/hard-task-specialist.toml
new file mode 100644
index 0000000..8dc431c
--- /dev/null
+++ b/arrangements/lean-delivery/agents/hard-task-specialist.toml
@@ -0,0 +1,21 @@
+name = "hard-task-specialist"
+nickname_candidates = [
+  "Robin Milner Type Boundary",
+  "Amir Pnueli Temporal Guard",
+  "John McCarthy Logic Path",
+  "John Backus Flow Law",
+  "John von Neumann System State",
+  "Alan Turing Coupled Proof",
+]
+description = "Implement changes with coupled invariants or cross-component contracts. Deliver the diff and focused validation. Use ordinary workers for established patterns; route authorization, money, or irreversible-data risk to critical-reviewer."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated change whose correctness depends on coupled invariants or cross-component contracts. Map the interacting flows before editing, state the invariant in observable terms, and make the smallest coherent change across the necessary boundaries. Preserve compatibility and failure semantics. Add focused tests that exercise the interaction rather than isolated fragments only.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not use this role for routine established-pattern work. Stop for an unresolved public contract, authorization, billing, irreversible-data, or deployment decision, and require independent critical review for the corresponding high-risk work. Do not hide coupling behind a shim or a partial implementation.
+
+Do not spawn agents, commit, push, deploy, or make unapproved external changes. Return outcome, invariant evidence, changed files, validation, residual risk, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/infra-sre.toml b/arrangements/lean-delivery/agents/infra-sre.toml
new file mode 100644
index 0000000..843dce7
--- /dev/null
+++ b/arrangements/lean-delivery/agents/infra-sre.toml
@@ -0,0 +1,21 @@
+name = "infra-sre"
+nickname_candidates = [
+  "Elon Musk Launch Check",
+  "Charity Majors Service Signal",
+  "Kelsey Hightower Cluster Guard",
+  "John Allspaw Recovery Drill",
+  "Gene Kim Readiness Gate",
+  "Niall Murphy Reliability Path",
+]
+description = "Implement bounded CI, container, deployment-preparation, runtime, or reliability work with explicit blast radius and rollback, and assess release readiness. Deliver the diff and its validation; deployment execution remains outside the child scope. An unclear failure mechanism goes to debugger."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Implement the delegated bounded infrastructure or reliability outcome. Read the current runtime, configuration, automation, and rollback plan before editing. For deployment work, prepare the rollout and rollback artifacts plus readiness evidence; deployment execution belongs to the parent or a user-authorized operator. State the blast radius, failure mode, observability, and rollback or recovery procedure that apply to the change. Validate with the closest safe environment and report any production-only uncertainty precisely.
+
+Complete the requested artifact and the checks affected by it before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not execute a deployment or other production action, including when execution has been approved for the parent or operator. Do not broaden a configuration or deployment-preparation change into unrelated modernization. Send an unknown failure mechanism to debugger. Preserve secure defaults, explicit resource boundaries, and reversible rollout behavior where the existing system supports them.
+
+Do not spawn agents, commit, push, execute deployments, or make external changes beyond the delegated authority. Return outcome, changed files, readiness and rollback evidence, risks, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/integrator-reviewer.toml b/arrangements/lean-delivery/agents/integrator-reviewer.toml
new file mode 100644
index 0000000..82208fc
--- /dev/null
+++ b/arrangements/lean-delivery/agents/integrator-reviewer.toml
@@ -0,0 +1,21 @@
+name = "integrator-reviewer"
+nickname_candidates = [
+  "Martin Fowler Seam Review",
+  "Jez Humble Delivery Check",
+  "Nicole Forsgren Flow Evidence",
+  "Camille Fournier Boundary Review",
+  "Gregor Hohpe Contract Link",
+  "Rebecca Parsons System Fit",
+]
+description = "Reconcile a bounded batch of worker deliverables against one acceptance contract. Read-only: read every touched file, run the scoped checks, and report integration defects for the lead to fix; deliver one consolidated report. High-risk certification goes to critical-reviewer."
+model = "gpt-5.6-sol"
+model_reasoning_effort = "high"
+developer_instructions = """
+Perform a read-only integration review of the delegated delivery set. Read every touched file and the shared acceptance contract. Trace the seams between callers, interfaces, domain behavior, persistence or integration edges, and observable outcomes. Run scoped checks that resolve an identified uncertainty. Tests may create disposable local fixtures or use designated isolated test services; never mutate deliverables or shared operational state, and do not cause production side effects.
+
+Repeat a scoped check only after a relevant change or new evidence.
+
+Report integration defects with concrete evidence, an end-to-end failure scenario, and the smallest owner-directed correction. Do not edit deliverables, certify high-risk work, or accept a test-only connection as proof of reachability. Send high-risk certification to critical-reviewer.
+
+Do not spawn agents or make external changes. Return one consolidated verdict, seam evidence, defects, checks run, residual risks, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/researcher.toml b/arrangements/lean-delivery/agents/researcher.toml
new file mode 100644
index 0000000..42a6dac
--- /dev/null
+++ b/arrangements/lean-delivery/agents/researcher.toml
@@ -0,0 +1,19 @@
+name = "researcher"
+nickname_candidates = [
+  "Claude Shannon Source Signal",
+  "Jane Goodall Evidence Trail",
+  "Carl Sagan Source Check",
+  "Marie Curie Primary Record",
+  "Vannevar Bush Reference Path",
+  "Eugene Garfield Citation Map",
+]
+description = "Answer a question against primary sources outside this repository: official docs, specifications, changelogs, and installed dependency source. Read-only; every perishable fact comes back dated and cited or marked UNVERIFIED. Repository questions go to explorer instead."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Answer the delegated external factual question from primary sources: official documentation, specifications, changelogs, or installed dependency source. Distinguish source facts from inference. Date perishable facts such as versions, limits, prices, API fields, and deprecations. Cite the direct source for every load-bearing claim and mark unresolved facts as UNVERIFIED with the smallest way to confirm them.
+
+Remain read-only. Do not edit files, make external changes, or turn a repository-archaeology request into internet research; repository discovery belongs to explorer. If sources conflict, report the conflict and explain which source is authoritative rather than silently choosing one.
+
+Do not spawn agents. Return answer, dated findings, sources, disagreements, unverified items, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/security-sweep.toml b/arrangements/lean-delivery/agents/security-sweep.toml
new file mode 100644
index 0000000..056ce1a
--- /dev/null
+++ b/arrangements/lean-delivery/agents/security-sweep.toml
@@ -0,0 +1,21 @@
+name = "security-sweep"
+nickname_candidates = [
+  "Whitfield Diffie Trust Check",
+  "Martin Hellman Key Guard",
+  "Joan Daemen Cipher Trace",
+  "Bruce Schneier Threat Lens",
+  "Ross Anderson Attack Path",
+  "Katie Moussouris Vulnerability Check",
+]
+description = "Review authentication, trust boundaries, secrets, input handling, and dependencies for security risk. Read-only, no destructive live testing; deliver evidence and mitigations. Authorization, monetary invariants, and destructive data changes require critical-reviewer before completion."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Perform the delegated, read-only security assessment. Map trust boundaries, entry points, data crossings, and privileged operations before drawing conclusions. Inspect authentication, authorization, input validation, injection, traversal, SSRF, unsafe file handling, secret exposure, and dependency risk when they are in scope. Prefer a few proven, reachable findings over speculative warnings.
+
+A safe local or disposable-fixture check is allowed only to resolve a concrete security question; remain read-only and do not cause production side effects.
+
+For each finding, provide severity, evidence, exploit route, impact, and a remediation direction. Do not alter code, run destructive probes, expose secrets, or make external changes. State precisely what was not examined. Send authorization, monetary-invariant, and destructive-data risk to critical-reviewer for independent review.
+
+Do not spawn agents. Return outcome, evidence, findings by severity, remediation direction, residual risk, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/test-engineer.toml b/arrangements/lean-delivery/agents/test-engineer.toml
new file mode 100644
index 0000000..1dcefd5
--- /dev/null
+++ b/arrangements/lean-delivery/agents/test-engineer.toml
@@ -0,0 +1,21 @@
+name = "test-engineer"
+nickname_candidates = [
+  "Lisa Crispin Test Charter",
+  "Janet Gregory Regression Map",
+  "Cem Kaner Failure Case",
+  "James Bach Test Probe",
+  "Michael Bolton Behavior Check",
+  "Elisabeth Hendrickson Acceptance Path",
+]
+description = "Create the smallest deterministic reproduction and targeted regression coverage for a named behavior or bug, including bounded browser journeys. Deliver the tests and their run evidence. Implementation goes to the responsible worker; independent risk review goes to a reviewer."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Create the smallest deterministic reproduction and targeted regression coverage for the delegated behavior. Read the code under test and existing suite before editing tests. For a bug, make the nearest relevant test fail first whenever practical; then prove the test protects the observable behavior rather than incidental implementation. Pin seeds and fixtures so the result reproduces.
+
+Complete the requested tests and the checks affected by them before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within scope; do not cause production side effects or repeat a check without a relevant change or new evidence.
+
+Do not change production behavior unless that work is separately delegated. Use real collaborators for integration claims and a real rendered surface for browser-journey acceptance when it is in scope. If a behavior fix is needed, hand it to the owning worker; if the risk needs independent review, identify the appropriate reviewer.
+
+Do not spawn agents, commit, push, deploy, or make external changes. Return outcome, test evidence, changed files, validation, remaining risk, and next action.
+"""
diff --git a/arrangements/lean-delivery/agents/test-runner.toml b/arrangements/lean-delivery/agents/test-runner.toml
new file mode 100644
index 0000000..93ef939
--- /dev/null
+++ b/arrangements/lean-delivery/agents/test-runner.toml
@@ -0,0 +1,21 @@
+name = "test-runner"
+nickname_candidates = [
+  "Tibo Reset Button",
+  "Tibo Retry Budget",
+  "Tibo Reset Check",
+  "Tibo Failure Report",
+  "Tibo Signal Probe",
+  "Tibo Green Gate",
+]
+description = "Run a named suite, read the output, and report what failed and why, with the smallest reproduction. Executes and diagnoses the log; it does not redesign the test architecture. A failure whose cause is genuinely unknown goes to debugger; new coverage goes to test-engineer."
+model = "gpt-5.6-luna"
+model_reasoning_effort = "max"
+developer_instructions = """
+Run the named test command using the project's declared environment and report a truthful verdict. Confirm the selection and capture the real exit status. Read from the first failure downward, separate distinct root causes from cascade noise, and give the shortest reproduction command for each. Report the denominator: collected, passed, failed, errored, skipped, and not collected.
+
+The named run may use safe local or disposable fixtures; do not cause production side effects or repeat it without a relevant change or new evidence.
+
+Classify each failure as product code, test code, stale fixture, environment, dependency, or flake, with evidence. A suite that cannot start, collects nothing unexpectedly, or skips the required behavior is blocked rather than passing. Do not weaken, skip, silence, quarantine, or delete tests. Send an unknown cause to debugger and a need for new coverage to test-engineer.
+
+Do not spawn agents, edit files, commit, push, deploy, or make external changes. Return verdict, commands and results, denominator, failures, unrun checks, and next action.
+"""
diff --git a/arrangements/lean-delivery/arrangement.toml b/arrangements/lean-delivery/arrangement.toml
new file mode 100644
index 0000000..164457c
--- /dev/null
+++ b/arrangements/lean-delivery/arrangement.toml
@@ -0,0 +1,16 @@
+schema_version = 1
+id = "lean-delivery"
+version = "0.1.0"
+author = "Rafael Bittencourt"
+description = "Lean Delivery: a public Codex Multi-Agent V2 arrangement with a leaner role allocation."
+license = "MIT"
+codex_version = "0.155.0-alpha.3.10"
+config = "config.toml"
+agents = "agents"
+instructions = "AGENTS.snippet.md"
+instructions_with_skill = "AGENTS.with-skill.snippet.md"
+optional_skills = [
+  "../../skills/codex-orchestration",
+  "../../skills/pragmatic-programmer",
+]
+optional_hook = "../../hooks/spawn-contract"
diff --git a/arrangements/lean-delivery/config.toml b/arrangements/lean-delivery/config.toml
new file mode 100644
index 0000000..87b0fd0
--- /dev/null
+++ b/arrangements/lean-delivery/config.toml
@@ -0,0 +1,10 @@
+model = "gpt-5.6-sol"
+model_reasoning_effort = "high"
+
+[features]
+multi_agent = true
+
+[features.multi_agent_v2]
+enabled = true
+tool_namespace = "agents"
+max_concurrent_threads_per_session = 7
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
new file mode 100644
index 0000000..30f0d3e
--- /dev/null
+++ b/docs/CHANGELOG.md
@@ -0,0 +1,24 @@
+# Changelog
+
+## 0.1.0
+
+- Introduce Advanced Delivery for complex product work and Lean Delivery for
+  cost-conscious work with a lighter specialist allocation.
+- Provide 19 independent agent TOMLs per arrangement, minimal configuration
+  fragments, and suggested AGENTS.md sections for user or project installation.
+- Add optional Apache-2.0 routing and pragmatic engineering skills with inline
+  invocation triggers, plus an MIT spawn-contract hook.
+- Keep reusable skills outside arrangements and open an independent plugin
+  contribution area for standard packages containing skills, MCP and hooks.
+- Add optional ASCII-safe, role-themed nickname pools and structured, concise
+  instruction sections with explicit fresh-context child briefs.
+- Account for the measured V2 namespaced hook identity and configure the explicit
+  V2 total-thread cap rather than the legacy child-cap field.
+- Explain fresh-context delegation, role/model ownership, follow-ups, concurrency
+  and runtime limitations, with official documentation and pinned source links.
+- Provide English installation/contribution guides, a complementary PT-BR guide,
+  issue forms, a PR template and credential-free cross-platform CI.
+- Document temporary-directory isolation for Windows runtime tests, based on
+  a real sandbox startup failure and a successful control-preserving correction.
+
+See [validation](validation.md) for measured results and compatibility limits.
diff --git a/docs/README.pt-BR.md b/docs/README.pt-BR.md
new file mode 100644
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--- /dev/null
+++ b/docs/README.pt-BR.md
@@ -0,0 +1,85 @@
+# Arranjos de agentes para Codex
+
+Este catálogo reúne combinações completas de um agente principal e seus
+especialistas. Os arquivos funcionam sem framework privado, servidor MCP ou
+skills externas obrigatórias. Cada arranjo fornece 19 papéis; você inicia apenas
+os que ajudam na tarefa.
+
+| Arranjo | Principal | Especialistas |
+| --- | --- | --- |
+| [Advanced Delivery](../arrangements/advanced-delivery/README.md) | Sol `xhigh` | 4 Astra, 9 Terra e 6 Luna |
+| [Lean Delivery](../arrangements/lean-delivery/README.md) | Sol `high` | 1 Astra, 1 Sol e 17 Luna |
+
+Ambos habilitam Multi-Agent V2. Advanced Delivery prioriza trabalhos de produto
+complexos, com mais modelos fortes para decisões e implementação acoplada.
+Lean Delivery prioriza o custo em trabalho bem definido, concentra trabalho em Luna e reserva
+Sol `high` para revisão da integração e Astra para revisão crítica.
+Frontend e backend ficam com Luna, assim como os demais papéis.
+Isso descreve a distribuição escolhida; não é uma promessa medida de preço ou
+qualidade. Os tetos configurados são 6 e 7, com recomendação conservadora de até
+5 e 6 filhos ativos, respectivamente. Confira a [compatibilidade](validation.md).
+
+## Instalar
+
+1. Tenha o Codex autenticado e confira `codex --version` e seu acesso aos modelos.
+   Baixe uma revisão conferida deste catálogo e escolha um arranjo.
+2. Escolha o nível: usuário (`$CODEX_HOME`, normalmente `~/.codex`) ou projeto
+   (`<projeto>/.codex`). Salve uma cópia local dos arquivos que editará.
+3. Mescle o fragmento `config.toml` nos blocos existentes. Não duplique tabelas
+   TOML nem substitua o arquivo inteiro. Copie os TOMLs para `agents/` nesse nível,
+   conferindo colisões de nomes antes de substituir arquivos.
+4. Insira `AGENTS.snippet.md` no AGENTS.md do usuário ou na raiz do projeto.
+   Preserve as demais instruções e confira se existe um AGENTS.override.md ativo.
+5. Abra uma nova sessão e confirme os papéis e configurações carregados. Projeto
+   precisa ser confiável para carregar suas configurações e hooks.
+
+Opcionalmente, copie `skills/codex-orchestration` e/ou `skills/pragmatic-programmer`,
+cada uma inteira com licença e aviso, para `~/.agents/skills/` ou
+`<projeto>/.agents/skills/`. Nesse caso use `AGENTS.with-skill.snippet.md` em lugar
+do outro trecho. Ele chama `$codex-orchestration` ao delegar e
+`$pragmatic-programmer` nas decisões de projeto, resultados sem causa explicada,
+duplicação de conhecimento, estado compartilhado e recursos finitos. Cada chamada
+fica junto da situação que a justifica, com orientação quando a skill não existe.
+As seções são independentes: se não instalar Pragmatic Programmer, omita sua
+seção opcional. As regras pedem a ferramenta de skills pelo nome exato quando
+ela existe; caso contrário, usam o mecanismo nativo de carregamento do runtime,
+sem inventar uma API `Skill`.
+
+As [skills](../skills/README.md) ficam fora dos arranjos e podem servir outros
+fluxos. A área de [plugins](../plugins/README.md) também recebe contribuições
+independentes no formato oficial, que podem reunir skills, MCP e hooks. Esta
+primeira versão não inclui um plugin instalável; escolher um arranjo não instala
+nem ativa essas integrações opcionais.
+
+O [hook opcional](../hooks/spawn-contract/README.md) exige Python 3.11+, caminhos
+locais ajustados e confiança na definição exata pelo `/hooks`. Ele verifica papel
+explícito, `fork_turns: "none"` e ausência de override de modelo/esforço. Sua
+cobertura depende da versão do runtime; não promete impedir recursão.
+
+As permissões, credenciais e ferramentas do seu ambiente continuam sendo suas.
+Subagentes podem herdá-las. Não copie sua configuração pessoal inteira para uma
+contribuição pública.
+
+## Verificar e contribuir
+
+Do diretório do catálogo, execute:
+
+```text
+python -X utf8 scripts/validate_catalog.py
+python -X utf8 scripts/validate_components.py
+python -X utf8 -m unittest discover -s tests -v
+```
+
+Em um projeto descartável, peça uma exploração, uma pequena implementação
+autorizada e uma revisão independente. Confira artefatos e registros reais de
+modelo e esforço. Testes do script não provam que o Codex chamou o hook.
+
+Para remover, apague apenas os componentes instalados e reverta os campos que
+você alterou, preservando suas mudanças posteriores. Reinicie o Codex.
+
+O [guia completo](installation.md) explica precedência, atualização e reversão.
+Para compartilhar outra combinação, siga [CONTRIBUTING.md](../CONTRIBUTING.md)
+e envie um PR com os TOMLs, a justificativa, a licença e evidências sanitizadas.
+Use inglês nos arquivos instaláveis, Issues e PRs. Guias complementares, como
+este, podem ser traduzidos. Você também pode propor correções em arranjos
+existentes usando o formulário de correção do repositório.
diff --git a/docs/configuration.md b/docs/configuration.md
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--- /dev/null
+++ b/docs/configuration.md
@@ -0,0 +1,38 @@
+# Configuration
+
+## Configuration items
+
+| Item | Authoritative location | Purpose and rollback |
+| --- | --- | --- |
+| Lead model and effort | Each arrangement's `config.toml` | Select the root agent; restore the prior fields in your installation to undo a change. |
+| V2 and namespace | Each arrangement's `config.toml` | Enable the required orchestration tools; revert only installed fields, preserving other feature settings. |
+| Concurrency cap | Each arrangement's `[features.multi_agent_v2]` table | Bound total active threads, including the lead in the target V2 runtime; consult counting evidence before adjusting. |
+| Specialist model, effort and behavior | Each `agents/<name>.toml` | Define one role; restore its reviewed prior revision, not a whole personal config. |
+| Optional hook command and matcher | `hooks/spawn-contract/hooks.example.json`, adapted at installation | Review and trust the local command; remove only this handler to uninstall. |
+| Optional skills | `skills/<skill-name>/SKILL.md`, declared in each manifest | Delegation and engineering decision procedures; inline triggers in the with-skill snippet include a fallback when absent. |
+
+## Baseline
+
+There are no runtime package dependencies. Python 3.11+ runs the validator,
+tests and optional hook. The target Codex baseline is declared in each
+arrangement's manifest; evidence and limitations live in [validation.md](validation.md).
+The arrangements contain no permission, credential, plugin or MCP configuration.
+Separately contributed [plugins](../plugins/README.md) may declare public optional
+capabilities; installing an arrangement never installs those capabilities.
+
+Role files include six English `nickname_candidates` per role. These playful
+public-figure references are display metadata, not affiliations, personas or
+role/model selection. Contributors may omit the field to use Codex defaults.
+The validator requires a nonempty list of trimmed, nonblank, unique strings
+containing only ASCII letters, digits, spaces, hyphens and underscores. This
+prevents the invalid-character failure that can make the loader ignore an entire
+role file. The client may still display the task path instead of the nickname;
+changing this metadata does not control every client's labels. See
+the [role parser](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/agent-roles/src/agent_role_config.rs)
+and [default nickname selection](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/core/src/agent/control/spawn.rs).
+
+## Change log
+
+| Version | Change | Reason | Rollback |
+| --- | --- | --- | --- |
+| 0.1.0 | Introduce two lead/specialist combinations, V2 fragments and optional spawn contract | Share independently installable delegation arrangements | Remove the selected roles, instruction section and optional components; restore only the original configuration fields. |
diff --git a/docs/installation.md b/docs/installation.md
new file mode 100644
index 0000000..f3b3509
--- /dev/null
+++ b/docs/installation.md
@@ -0,0 +1,135 @@
+# Install an arrangement
+
+Use an existing authenticated Codex CLI installation. Check `codex --version` and
+the [validation record](validation.md); these packages target Multi-Agent V2 and
+do not silently fall back to V1. You need access to the named models. Python 3.11+
+is needed only for the optional hook and local validation.
+
+## Choose a scope
+
+| Component | User scope | Project scope |
+| --- | --- | --- |
+| Configuration | `$CODEX_HOME/config.toml` (normally `~/.codex/config.toml`) | `<project>/.codex/config.toml` |
+| Agent TOMLs | `$CODEX_HOME/agents/` | `<project>/.codex/agents/` |
+| Instructions | `$CODEX_HOME/AGENTS.md` | `<project>/AGENTS.md` |
+| Optional skill directories | `~/.agents/skills/<skill-name>/` | `<project>/.agents/skills/<skill-name>/` |
+| Optional hooks | `$CODEX_HOME/hooks.json` | `<project>/.codex/hooks.json` |
+
+`CODEX_HOME` selects a Codex home; the arrangement names do not require separate
+homes or a special installation mode. Skill discovery uses `.agents/skills` as described in
+the [official skill documentation](https://developers.openai.com/codex/skills).
+Project configuration and hooks require a trusted project. Inspect existing user
+and project configuration before choosing the scope: more specific settings may
+override your selection, and same-named agents can shadow other definitions.
+
+## Install the core package
+
+1. Clone or download a reviewed revision of this repository. Choose exactly one
+   arrangement. Record the revision and save a local backup of each destination
+   you will edit. Do not commit backups containing personal configuration.
+2. Open the arrangement's `config.toml`. Merge its lead settings and the fields
+   under `[features]` and `[features.multi_agent_v2]` into the chosen
+   destination. TOML tables must not be declared twice. Preserve unrelated fields.
+   Keep the cap under the V2 table: the older `[agents]` cap is interpreted
+   differently by this runtime. Do not copy that legacy cap into this fragment.
+3. Copy the chosen arrangement's `agents/*.toml` into the destination `agents/`
+   directory. Review every name collision before replacing a file. Do not combine
+   these two arrangements' same-named roles in one scope.
+4. Insert the content of `AGENTS.snippet.md` into the appropriate AGENTS.md, without
+   replacing its other instructions. If an AGENTS.override.md is active at that
+   scope, reconcile with it: a lower-priority file may not be loaded.
+5. Start a new Codex session in the target project. Inspect warnings, available
+   roles and effective settings. Existing sessions may retain earlier settings.
+
+Model and effort are pinned in the role TOMLs. Do not override them at spawn time.
+The snippets deliberately require `agent_type` and `fork_turns: "none"`; supply
+the child's necessary context in the task brief and use the current native tool
+schema for the task name and message. Only the lead delegates.
+Read [the orchestration rationale](orchestration.md) for the reasons behind
+fresh context, role selection, model ownership, concurrency and follow-ups.
+
+The files do not configure MCP servers, plugins, credentials, approval policies or
+sandbox permissions. Subagents can inherit tools and permissions from your existing
+environment. A role described as read-only is a behavioral instruction, not an
+independent security sandbox.
+
+## Optional skills
+
+Copy the chosen directories from `skills/`, including each LICENSE and NOTICE,
+to the chosen skill location. The manifests list both optional skills:
+
+- `codex-orchestration`: invoke `$codex-orchestration` before bounded delegation
+  or reconciliation of worker deliveries.
+- `pragmatic-programmer`: invoke `$pragmatic-programmer` when choosing a boundary
+  or reversible first step, diagnosing unexplained success, checking duplicated
+  knowledge, or handling shared state and finite resources.
+
+Use `AGENTS.with-skill.snippet.md` instead of the standalone orchestration snippet;
+do not install both. Its inline rules name the skill at the relevant situation.
+Verify each installed skill is discoverable before relying on its invocation.
+Use the runtime's Skill tool with the exact name when exposed; otherwise follow
+its native loading mechanism. Codex's `$skill-name` prompt syntax is not a
+guarantee that a tool literally named `Skill` exists. The
+[skill guide](../skills/README.md) explains this distinction.
+If a skill is absent, follow the snippet's fallback without inventing a tool or
+requiring a private installation. You may install either skill independently.
+If Pragmatic Programmer is not selected, omit its optional engineering section.
+
+## Optional plugins
+
+Plugins are independent components in [plugins/](../plugins/README.md), not part
+of either arrangement's configuration. A contributed plugin may bundle skills,
+MCP connections and hooks, with its own installation and access requirements.
+The initial release does not include an installable plugin bundle. Review each
+future plugin's manifest, dependencies and runtime evidence before installing;
+installation does not authorize external data sharing or automatically trust hooks.
+
+## Optional spawn hook
+
+Follow [the hook guide](../hooks/spawn-contract/README.md). Copy the script to a
+stable local path, replace the example command with your actual Python and script
+paths, and merge its matcher into the chosen hooks.json. Quote paths containing
+spaces for your platform. Enable hooks only if you choose to install them.
+
+Review and trust the exact hook in Codex's `/hooks` interface. Do not copy someone
+else's trust hashes. Hook sources are additive: project hooks do not replace user
+hooks, and multiple matching handlers can all run. Do not install the same hook
+at both scopes. Verify real interception using the guide before relying on it.
+
+## Check the installation
+
+Run the catalog checks from the downloaded repository:
+
+```text
+python -X utf8 scripts/validate_catalog.py
+python -X utf8 scripts/validate_components.py
+python -X utf8 -m unittest discover -s tests -v
+```
+
+In a disposable project, ask the lead:
+
+```text
+Delegate a read-only map of this project's entry point to explorer, with an
+explicit role and no history fork. Have it cite the decisive file. Verify its
+answer yourself and report the child's resolved model and effort from the actual
+runtime record, not its self-description. Do not change files.
+```
+
+Then use a small authorized edit and an independent review to exercise an
+implementer and reviewer. Compare actual loaded roles with the arrangement, and
+check for unexpectedly inherited tools. Treat missing roles, unavailable models,
+hook warnings or failed checks as installation failures.
+
+On Windows, isolated test runners should also isolate their temporary directory
+before launching Codex. See [sandbox startup diagnostics](windows-sandbox.md)
+for the measured failure and the fix that preserves sandbox controls.
+
+## Update or remove
+
+Review the diff between revisions before updating. Compare your current files
+with the saved installation revision so your later edits are preserved. Remove
+only the installed roles, the inserted instruction section and the selected hook
+entry; remove the skill directory only if nothing else uses it. Restore only the
+configuration fields you changed from the recorded prior values. Restart Codex
+and confirm the old arrangement no longer appears. No automatic installer or
+uninstaller modifies your environment.
diff --git a/docs/orchestration.md b/docs/orchestration.md
new file mode 100644
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--- /dev/null
+++ b/docs/orchestration.md
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+# Why these orchestration choices
+
+These arrangements package a delegation policy, not a replacement for your
+AGENTS.md or personal Codex configuration. Insert only the suggested section and
+merge only the supplied TOML fields. Keep the longer explanations in this guide
+instead of loading them into every conversation.
+
+## Choose by complexity and cost intent
+
+**Advanced Delivery** assigns more capable specialist models to difficult design,
+advice, coupled implementation and critical review. Use it when uncertainty and
+business impact justify more reasoning across several responsibilities.
+
+**Lean Delivery** concentrates the same responsibilities on lighter models. Use
+it for well-defined work where spending on every specialist is less useful. Its
+integration reviewer uses Sol `high`; its critical reviewer uses Astra `high`.
+All other specialists, including backend and frontend workers, use Luna `max`.
+This keeps the expensive specialist allocation narrow while retaining a dedicated
+cross-delivery integration review. The lead is separate from these child counts.
+The lead must reassess tasks that exceed the assigned specialist's capability.
+Calling a reviewer to perform implementation is not a valid cost escalation.
+
+Choose by the actual task and available role descriptions. File count alone says
+little about complexity: a small authorization change can carry more risk than a
+large mechanical update. A role that requires repeated correction can cost more
+than a stronger role completing the work once. These are design tradeoffs;
+this catalog does not publish an unmeasured price ranking or savings percentage.
+
+## Why `fork_turns: "none"`
+
+A fresh child receives a deliberate brief rather than the parent's accumulated
+conversation. This keeps irrelevant history and abandoned assumptions out of a
+bounded assignment and makes its inputs easier to review. The tradeoff is that
+the parent must provide the necessary context explicitly: accepted decisions,
+files, interfaces, constraints, output and validation.
+
+`none` does **not** mean no instructions, no tools or a security boundary. The
+child still receives its role and applicable runtime/project instructions and
+can inherit environment capabilities. Keep task context small and complete;
+do not confuse a shorter prompt with permission isolation.
+
+Omitting the argument is not equivalent to `none`. The inspected upstream V2
+parser defaults an omitted/empty value to `all`, accepts `none`, `all` or a
+positive integer string, and rejects the older `fork_context` field. See the
+[V2 spawn implementation](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/core/src/tools/handlers/multi_agents_v2/spawn.rs).
+
+Upstream history-fork behavior has evolved. That source revision can apply a
+named role even with a full-history fork; it would be incorrect to claim that
+every Codex version always rejects that combination or always ignores the role.
+This catalog deliberately chooses fresh-context delegation regardless, and the
+optional hook enforces that narrower policy where interception is proven.
+
+## Why explicit roles and TOML-owned models
+
+`agent_type` selects a role, not a task nickname or a model. Each published role
+has one TOML containing its model, reasoning effort and behavioral instructions.
+The runtime's live role catalog or installed files are the source for what can
+actually be selected. `list_agents` shows thread activity, not all available roles.
+
+Pinning model and effort together makes the specialist choice reviewable and
+avoids inheriting an effort that is unsuitable for another model. The arrangements
+exclude call-level overrides to keep one source of configuration for each role.
+This is our policy, not a claim that the runtime cannot support overrides. The
+[official subagent documentation](https://developers.openai.com/codex/multi-agent)
+explains configuration inheritance and custom-agent precedence. The inspected
+upstream spawn code resolves requested overrides before applying the role.
+
+Read-only and implementing roles have different jobs. A review should return
+findings and evidence, while an implementation assignment should return a diff
+and validation. The lead retains integration and acceptance responsibility.
+
+## Why task names and follow-ups matter
+
+Use a short task name for the bounded assignment and put the full objective in
+the brief. The task name identifies the spawned work; `agent_type` identifies the
+specialist configuration. They are different fields.
+
+A client may show the hierarchical task path (for example,
+`/root/review_api_contract`) in its activity label instead of the optional
+nickname. Prefer descriptive task names such as `review_api_contract` or
+`validate_installation`, following the exposed schema's character rules.
+Nickname customization is neither required for delegation nor a promise about
+how a particular client renders the task.
+
+In the inspected V2 source, the spawn response includes `task_name` and
+`nickname`, but the subsequent
+[activity item](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/protocol/src/items.rs#L352-L358)
+contains the thread ID, task path and activity kind without a nickname. The
+[public TUI activity renderer](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/tui/src/multi_agents.rs#L286-L340)
+uses that path. Thus a valid nickname can coexist with a path-only activity
+label. The closed ChatGPT/Work renderer was not inspected; its exact label
+behavior remains unverified. Changing a role's nickname pool does not change
+this event contract.
+
+`send_message` queues information for an existing child. `followup_task` requests
+another turn, including for a finished child, retaining that child's history.
+Use a follow-up for a correction that benefits from the child's prior context;
+spawn a fresh child for a new independent assignment. The upstream handlers make
+the distinction explicit: [queue-only message](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/core/src/tools/handlers/multi_agents_v2/send_message.rs)
+and [turn-triggering follow-up](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/core/src/tools/handlers/multi_agents_v2/followup_task.rs).
+
+Use the native tool namespace and schema exposed by your runtime. A configured
+namespace does not mean those tools are callable inside every code execution tool.
+Do not substitute an external agent process or a shared file for native delegation.
+
+## Why bounded concurrency and one delegation level
+
+Parallelism helps when children can make independent progress. It also increases
+token use and contention for shared files, test services and the lead's review
+capacity. Reserve capacity, keep writing scopes disjoint, and serialize interacting
+changes. When the cap is reached, advance independent local work; wait only when
+the next useful step depends on a child.
+
+The supplied caps are configuration values, not a promise to launch that many
+children at once. Counting differs across versions; see [validation](validation.md).
+A completed child appearing in a thread list does not by itself establish that it
+still occupies an active slot. Do not invent a close tool that your runtime lacks.
+
+Only the lead delegates so it can see the full work allocation, cost exposure
+and integration risks. This restriction lives in the snippets and role instructions.
+The spawn-contract hook checks arguments; it does not establish caller ancestry
+or mechanically guarantee a recursion limit.
+
+## Evidence and references
+
+### Prompt and skill design
+
+The instruction review uses OpenAI's September 11, 2026 guidance,
+[Rethinking skills and prompts for GPT-6 Astra](https://developers.openai.com/blog/rethinking-skills-and-prompts-for-gpt-6-astra).
+Skill discovery stays narrow; AGENTS excerpts invoke optional procedures only
+for relevant situations. Role prompts identify the artifact, responsibility and
+safe operating boundary without prescribing a universal sequence of reads or tests.
+Delegation rules retain the exact fields needed by the measured runtime.
+
+Local checks using disposable fixtures can proceed within the assigned scope;
+publication, production access and unrelated changes require the applicable
+authorization. Implementation briefs ask for a completed, verified change rather
+than a first draft. The same instructions serve several model families, so
+leaner text is a design choice to evaluate, not proof of equal behavior across
+models. Real-run evidence remains necessary after prompt changes.
+
+The source links above pin the revision inspected while building this catalog;
+they are not proof that an installed binary has the same implementation. Runtime
+acceptance must report its own version and observed tool events. In addition to
+the linked source, consult:
+
+- [Official configuration reference](https://developers.openai.com/codex/config-reference)
+- [Official AGENTS.md guide](https://developers.openai.com/codex/guides/agents-md)
+- [Official skills documentation](https://developers.openai.com/codex/skills)
+- [Official hooks documentation](https://learn.chatgpt.com/docs/hooks)
+
+Review changes in the runtime before updating a manifest's compatibility claim.
+Keep operational measurements in validation records, not in the installed
+instruction snippet as an undated universal guarantee.
diff --git a/docs/runtime-evidence.json b/docs/runtime-evidence.json
new file mode 100644
index 0000000..f5dedc8
--- /dev/null
+++ b/docs/runtime-evidence.json
@@ -0,0 +1,382 @@
+{
+  "schema_version": 2,
+  "observed_on": "2026-09-12",
+  "scope": "Installed Codex CLI runtime validation. A user-authorized credential file was temporarily copied into an isolated home for authenticated testing, never printed or published. The copy was removed and its absence verified in all four known isolated homes. The original credential file was not modified.",
+  "temporary_credential_copy_removed": true,
+  "installed_cli": {
+    "command": "codex.exe --version",
+    "exit_code": 0,
+    "version": "0.155.0-alpha.3.10"
+  },
+  "native_hook_name_diagnosis": {
+    "status": "pass",
+    "scenario": "A trusted diagnostic-only PreToolUse handler retained only the event name and tool name for one native spawn request.",
+    "observed": {
+      "event_name": "PreToolUse",
+      "tool_name": "agentsspawn_agent"
+    },
+    "effect": "The deployed matcher and guard allow-list include the measured flattened name. The diagnostic handler made no permission decision and was removed before acceptance probes."
+  },
+  "native_spawn_scenarios": [
+    {
+      "name": "deny_non_fresh_context",
+      "status": "pass",
+      "requested_contract": {
+        "agent_type": "hard-task-specialist",
+        "fork_turns": "all"
+      },
+      "native_tool_arguments_observed": false,
+      "observed": {
+        "root_turn_status": "completed",
+        "hook_lifecycle": [
+          "started",
+          "blocked"
+        ],
+        "hook_feedback_present": true,
+        "spawn_contract_feedback_present": true,
+        "child_count": 0,
+        "app_server_exit_code": 0
+      },
+      "meaning": "The trusted corrected PreToolUse guard intercepted the native flattened spawn tool before child creation. The requested contract is recorded separately because raw native arguments were intentionally not retained."
+    },
+    {
+      "name": "allow_hard_task_specialist_before_auth_refresh",
+      "status": "blocked_external_usage_limit",
+      "requested_contract": {
+        "agent_type": "hard-task-specialist",
+        "fork_turns": "none"
+      },
+      "native_tool_arguments_observed": false,
+      "observed": {
+        "hook_lifecycle": [
+          "started",
+          "completed"
+        ],
+        "runtime_reported_child": {
+          "agent_role": "hard-task-specialist",
+          "model": "gpt-6-astra",
+          "reasoning_effort": "high"
+        },
+        "root_turn_status": "failed",
+        "root_turn_error_class": "usageLimitExceeded",
+        "app_server_exit_code": 0
+      },
+      "meaning": "The hook allowed the request and the runtime reported the selected child role metadata, but that root did not complete."
+    },
+    {
+      "name": "lean_explorer",
+      "status": "pass",
+      "requested_contract": {
+        "agent_type": "explorer",
+        "fork_turns": "none"
+      },
+      "native_tool_arguments_observed": false,
+      "observed": {
+        "root_model": "gpt-5.6-sol",
+        "root_reasoning_effort": "high",
+        "hook_lifecycle": [
+          "started",
+          "completed"
+        ],
+        "runtime_reported_child": {
+          "agent_role": "explorer",
+          "model": "gpt-5.6-luna",
+          "reasoning_effort": "max",
+          "terminal_status": "completed"
+        },
+        "assistant_expected_token_observed": true,
+        "successful_file_read_verified": false
+      },
+      "meaning": "A native allowed role selection completed. The assistant returned the expected token, but that token was already supplied in its prompt; this is response evidence, not proof of a file read."
+    },
+    {
+      "name": "advanced_backend_worker",
+      "status": "pass",
+      "requested_contract": {
+        "agent_type": "backend-worker",
+        "fork_turns": "none"
+      },
+      "native_tool_arguments_observed": false,
+      "observed": {
+        "root_model": "gpt-5.6-sol",
+        "root_reasoning_effort": "xhigh",
+        "hook_lifecycle": [
+          "started",
+          "completed"
+        ],
+        "runtime_reported_child": {
+          "agent_role": "backend-worker",
+          "model": "gpt-5.6-terra",
+          "reasoning_effort": "max",
+          "terminal_status": "completed"
+        },
+        "assistant_expected_token_observed": true,
+        "successful_file_read_verified": false
+      },
+      "meaning": "A native allowed role selection completed. The assistant returned the expected token, but that token was already supplied in its prompt; this proves neither a file read nor a file mutation."
+    },
+    {
+      "name": "advanced_critical_reviewer",
+      "status": "pass",
+      "requested_contract": {
+        "agent_type": "critical-reviewer",
+        "fork_turns": "none"
+      },
+      "native_tool_arguments_observed": false,
+      "observed": {
+        "root_model": "gpt-5.6-sol",
+        "root_reasoning_effort": "xhigh",
+        "hook_lifecycle": [
+          "started",
+          "completed"
+        ],
+        "runtime_reported_child": {
+          "agent_role": "critical-reviewer",
+          "model": "gpt-6-astra",
+          "reasoning_effort": "high",
+          "terminal_status": "completed"
+        }
+      },
+      "meaning": "The selected reviewer role completed a bounded native role probe. It was not the independent review of the later synthetic write fixture."
+    }
+  ],
+  "fixture_response_audit": {
+    "status": "pass",
+    "method": "Assistant and non-assistant transcript records were counted separately for exact synthetic fixture tokens.",
+    "assistant_exact_token_count": 2,
+    "non_assistant_token_occurrence_count": 4,
+    "confirmed_assistant_response_roles": [
+      {
+        "agent_role": "explorer",
+        "model": "gpt-5.6-luna",
+        "reasoning_effort": "max"
+      },
+      {
+        "agent_role": "backend-worker",
+        "model": "gpt-5.6-terra",
+        "reasoning_effort": "max"
+      }
+    ],
+    "expected_token_supplied_in_prompt": true,
+    "successful_file_read_verified": false,
+    "meaning": "Two assistant responses were observed. Because their expected token was present in the prompt, matching it does not establish that either child read the fixture file."
+  },
+  "configuration_and_capacity": {
+    "lean_delivery_user_scope": {
+      "status": "pass",
+      "fresh_app_server_reload": true,
+      "role_cards_copied": 19,
+      "main_model": "gpt-5.6-sol",
+      "main_reasoning_effort": "high",
+      "v2_max_concurrent_threads_per_session": 7,
+      "trusted_pre_tool_hook": true
+    },
+    "advanced_delivery_user_scope": {
+      "status": "pass",
+      "fresh_app_server_reload": true,
+      "role_cards_copied": 19,
+      "main_model": "gpt-5.6-sol",
+      "main_reasoning_effort": "xhigh",
+      "v2_max_concurrent_threads_per_session": 6,
+      "trusted_pre_tool_hook": true
+    },
+    "project_scope_current_arrangements": {
+      "status": "pass",
+      "fixture": "Dedicated isolated Git project. Only its exact root was trusted through isolated configuration before the app-server was launched from that workspace.",
+      "fresh_config_layer_types": [
+        "project",
+        "user",
+        "system"
+      ],
+      "advanced_delivery": {
+        "fresh_app_server_reload": true,
+        "role_cards_copied": 19,
+        "main_model": "gpt-5.6-sol",
+        "main_reasoning_effort": "xhigh",
+        "v2_max_concurrent_threads_per_session": 6,
+        "trusted_pre_tool_hook_source": "project"
+      },
+      "lean_delivery": {
+        "fresh_app_server_reload": true,
+        "role_cards_copied": 19,
+        "main_model": "gpt-5.6-sol",
+        "main_reasoning_effort": "high",
+        "v2_max_concurrent_threads_per_session": 7,
+        "trusted_pre_tool_hook_source": "project"
+      },
+      "caveat": "Role-card copying and layer loading prove configuration presence only. They do not prove all 19 roles are runtime-exposed or executable."
+    },
+    "actual_concurrency_boundary": "not_run; configured values 6 and 7 are not treated as cap-enforcement evidence",
+    "release_after_child_completion": "not_run"
+  },
+  "synthetic_write_and_review": {
+    "status": "writer_artifact_pass_review_blocked_process_startup",
+    "fixture_contract": "Normalize the three supplied spacing and separator variants to one hyphenated lowercase value, then have an independent reviewer inspect the resulting change and test result.",
+    "baseline": {
+      "source_sha256": "1abc522dfffdb7bc813b8285d5d3eaeda05f1672a461681d57c6115079caebeb",
+      "test_sha256": "b3e61e7b070c37081ce9728f7a2689d2cbecd887e2f6894ec51d17b6d3e641c5",
+      "unittest_exit_code": 1,
+      "failure_class": "expected red baseline"
+    },
+    "windows_sandbox_resolution": {
+      "status": "pass",
+      "method": "No-model installed app-server thread-start probe in the isolated runtime.",
+      "requested_workspace_write_without_selector": "readOnly",
+      "with_windows_sandbox_unelevated": "workspaceWrite",
+      "with_windows_sandbox_elevated": "workspaceWrite",
+      "selected_isolated_setting": "windows.sandbox=unelevated",
+      "scope": "The selected setting applied only to the isolated fixture. Network remained disabled; no full-access flag, UAC, account, or host setting was changed."
+    },
+    "direct_app_server_attempt": {
+      "status": "inconclusive",
+      "observed": {
+        "resolved_child_sandbox": "workspace-write",
+        "elapsed_seconds_before_controller_close": 92.5,
+        "last_shell_invocation": "Get-Content <isolated-file> in <isolated-workspace>",
+        "following_tool_calls": [
+          "wait",
+          "wait",
+          "wait",
+          "wait"
+        ],
+        "child_terminal_status_after_close": "interrupted",
+        "source_changed": false,
+        "unittest_exit_code": 1
+      },
+      "harness_caveat": "The test RPC client queues unmatched inbound JSON-RPC messages but has no response path. No inbound method-plus-id record was captured. A later standalone sandbox probe reproduced the command stall without this RPC client; the bridge hypothesis is not an established cause."
+    },
+    "native_cli_attempt": {
+      "status": "blocked",
+      "method": "Fresh installed native CLI root with strict configuration, workspace-write sandbox, isolated Windows sandbox selector, JSON events, and one explicit backend-worker/fork-none request. No model override, bypass flag, or parallel app-server was used.",
+      "observed_event_categories": [
+        "thread.started",
+        "turn.started",
+        "agent_message",
+        "collab_tool_call"
+      ],
+      "spawn_call_in_cli_event_export": false,
+      "child_creation_verified_from_session_metadata": true,
+      "verified_child_count": 1,
+      "verified_child_role": "backend-worker",
+      "linkage_method": "The persisted child metadata names the CLI root as parent_thread_id and session_id, with thread_source=subagent. Empty receiver IDs in the CLI event export do not establish zero children.",
+      "child_command_progress": "The child attempted to read a triggered skill before implementation. PowerShell, no-login PowerShell and cmd.exe attempts all remained in running code-mode cells without terminal command output.",
+      "last_tool": {
+        "tool": "wait",
+        "status": "in_progress",
+        "receiver_count": 0
+      },
+      "owned_cli_process_tree": {
+        "bounded_deadline_reached": true,
+        "owned_process_exit_code": 1,
+        "post_deadline_scoped_processes": 0
+      },
+      "meaning": "The persisted session proves child creation, although the CLI event export omitted a spawn event and receiver IDs. The child stalled on command execution before editing the fixture. Only the exact process tree started for this probe was terminated."
+    },
+    "standalone_sandbox_command": {
+      "status": "blocked",
+      "method": "Installed codex sandbox -P :workspace -c windows.sandbox=unelevated -C <isolated-workspace> cmd.exe /d /c echo SANDBOX_COMMAND_OK, with a 20-second deadline.",
+      "model_turns": 0,
+      "credential_copy_present": false,
+      "app_server_or_code_mode_used": false,
+      "bounded_deadline_reached": true,
+      "stdout_empty": true,
+      "stderr_empty": true,
+      "owned_process_exit_code_after_tree_cleanup": 1,
+      "post_deadline_scoped_processes": 0,
+      "meaning": "The command stall reproduces in the standalone Windows sandbox path without a model, authentication, app-server client or code-mode cell. The underlying runner/startup cause is still unconfirmed; no sandbox bypass or host security change was attempted."
+    },
+    "temporary_directory_follow_up": {
+      "status": "pass",
+      "method": "Repeat the same no-model sandbox echo with only the child process TEMP and TMP changed to an owned empty directory before Codex starts.",
+      "sandbox_profile": ":workspace",
+      "windows_backend": "unelevated",
+      "private_desktop_setting_changed": false,
+      "security_controls_disabled": false,
+      "exit_code": 0,
+      "expected_echo_observed": true,
+      "native_start_to_success_ms": 66,
+      "original_other_io_operations_at_2s": 47020,
+      "original_other_io_operations_at_8s": 182675,
+      "isolated_other_io_operations_at_exit": 2849,
+      "host_temp_cleaned": false,
+      "user_or_machine_environment_changed": false,
+      "meaning": "Inherited temporary-directory state determines this measured startup failure. The other-I/O counts are consistent with metadata preparation, but no particular internal ACL or enumeration operation was traced. Console/bridge failure is not established as the cause. Native artifact and review acceptance must still be measured separately."
+    },
+    "post_attempt_artifact": {
+      "source_sha256": "1abc522dfffdb7bc813b8285d5d3eaeda05f1672a461681d57c6115079caebeb",
+      "test_sha256": "b3e61e7b070c37081ce9728f7a2689d2cbecd887e2f6894ec51d17b6d3e641c5",
+      "source_changed": false,
+      "test_unchanged": true,
+      "unittest_exit_code": 1
+    },
+    "native_artifact_follow_up": {
+      "status": "writer_artifact_pass_review_blocked_process_startup",
+      "method": "Two separate native CLI roots, each with an owned unique TEMP/TMP directory and a bounded owned process tree; the second root requested read-only critical review.",
+      "writer": {
+        "agent_role": "backend-worker",
+        "model": "gpt-5.6-terra",
+        "reasoning_effort": "max",
+        "parent_child_linkage_verified": true,
+        "source_sha256_after": "5709b76f4fc03a3112f4dffcf7ed2bdcf4f1e6bf4fff42be8671a880ee44ca71",
+        "test_sha256_after": "b3e61e7b070c37081ce9728f7a2689d2cbecd887e2f6894ec51d17b6d3e641c5",
+        "source_changed": true,
+        "test_unchanged": true,
+        "external_parent_unittest_exit_code": 0,
+        "external_parent_unittest_count": 1,
+        "native_root_independent_test": "blocked_process_startup"
+      },
+      "reviewer": {
+        "requested_role": "critical-reviewer",
+        "runtime_role": "critical-reviewer",
+        "runtime_model": "gpt-6-astra",
+        "runtime_reasoning_effort": "high",
+        "parent_child_linkage_verified": true,
+        "artifact_review_verified": false,
+        "native_root_test_ran": false,
+        "error": "CreateProcessAsUserW failed: -1073283067"
+      },
+      "meaning": "The native child made a real file change and an external parent verified the unchanged behavioral test passes. Both native roots later reported process-startup errors; a completed CLI turn with exit code 0 does not establish successful review or native parent testing."
+    },
+    "shell_packaging_control": {
+      "status": "store_shell_blocked",
+      "method": "No-model echo comparisons with the same workspace sandbox and unique TEMP/TMP. The sandbox and private desktop stayed enabled.",
+      "cmd_without_job": "pass",
+      "cmd_with_job": "pass",
+      "store_powershell_7_6_6_without_job": "CreateProcessAsUserW failed: -1073283067",
+      "store_powershell_7_6_6_with_job": "CreateProcessAsUserW failed: -1073283067",
+      "store_execution_alias_without_job": "CreateProcessAsUserW failed: 5",
+      "store_execution_alias_with_job": "CreateProcessAsUserW failed: 5",
+      "official_portable_powershell_7_6_6_control": "pass; packaging contrast only, not a replacement acceptance path",
+      "portable_zip_sha256": "02fe458be20493fbdf43f61ea20610b811ee6c738ab1676c61b9cfcd1a33c860",
+      "portable_executable_authenticode": "Valid; Microsoft Corporation",
+      "store_installation_changed": false,
+      "global_path_changed": false,
+      "owned_processes_remaining": 0,
+      "meaning": "The measured Store shell failure is independent of the test Job Object. The diagnostic alternate shell does not validate or replace the Store installation. No more model turns were spent on this environment failure."
+    },
+    "meaning": "The temporary-directory repair enabled a native child to edit the fixture. Independent artifact review remains blocked by a separate process-startup failure; full runtime acceptance is not claimed."
+  },
+  "rate_limit_follow_up": {
+    "status": "unavailable",
+    "error_class": "rpc_error",
+    "method": "Read-only installed app-server capability probe with reset and credit details excluded.",
+    "meaning": "No sanitizable rate-limit snapshot was returned, so no reset time or recovery estimate is claimed."
+  },
+  "not_claimed": [
+    "Exact native spawn arguments; the retained diagnostic intentionally captured only event and tool name.",
+    "Runtime exposure or execution of all 19 copied role cards.",
+    "Concurrency-cap boundary or released-slot behavior for either configured total.",
+    "Project-scope role execution.",
+    "A successful native file read from an assistant echo of a prompt-supplied token.",
+    "A successful independent native artifact review.",
+    "A confirmed inbound RPC request as the direct app-server stall cause.",
+    "A successful test command from the native writer root; the external parent test is separately verified."
+  ],
+  "reproduction_method": [
+    "Launch the installed Codex app-server in stdio mode with strict configuration and an isolated home.",
+    "Initialize the protocol, write the reviewed hook configuration, obtain its exact current hash through hooks/list, and persist trust only for that exact hook identifier and hash.",
+    "For configuration evidence, use a dedicated isolated Git workspace, trust only that root, request configuration with layers included, and launch from that workspace.",
+    "For native role evidence, make one bounded explicit native agents.spawn_agent request, retain only sanitized lifecycle and role metadata, and distinguish assistant records from prompt text.",
+    "For a writable fixture, establish the Windows sandbox resolution with a no-model thread-start probe before attempting a bounded native child operation."
+  ]
+}
diff --git a/docs/validation.md b/docs/validation.md
new file mode 100644
index 0000000..abc474e
--- /dev/null
+++ b/docs/validation.md
@@ -0,0 +1,93 @@
+# Validation and compatibility
+
+Validation distinguishes a parsed package, an executable hook and a functioning
+integration. None substitutes for the others.
+
+The sanitized [runtime evidence record](runtime-evidence.json) identifies the
+measured scenarios and their outcomes. A completed model turn, a copied role file
+or a configured cap alone is not a completed implementation or saturation test.
+
+## Current measured status
+
+Version 0.1.0 is a community catalog preview, not a certification of every role,
+platform or concurrency limit. Known integration limits are listed below.
+
+The initial 2026-09-12 Windows run verified native hook interception on allowed and
+blocked paths, three completed role selections, and user/project configuration
+loading. Its first native file-edit attempt left the fixture unchanged and its
+behavioral check red. After temporary-directory isolation, a fresh native
+backend-worker changed the source, preserved the test file, and passed that test
+when independently executed by the external parent. The native parent and a
+separate reviewer then encountered `CreateProcessAsUserW failed: -1073283067`;
+the reviewer could not read or test the artifact. A no-model comparison isolated
+that failure to Store-packaged PowerShell in the tested sandbox, independently
+of the test's process containment. The Store installation was not changed.
+Concurrency saturation and slot release were not run. Full runtime acceptance
+on this environment remains blocked; this is not evidence of a role-card defect.
+
+A no-model follow-up reproduced the stall with a standalone Windows sandbox
+`echo` command, without authentication, app-server or code mode. This narrows
+the failing path. Changing only the test process's `TEMP` and `TMP` to an owned
+empty directory then made that same command pass, with a native `START` to
+`SUCCESS` interval of 66 ms. No sandbox or private-desktop control was disabled.
+See [Windows test isolation](windows-sandbox.md). This correction enabled the
+measured child file edit, but does not explain or resolve the later process-startup error.
+
+Two completed roles returned a token supplied in their prompts. Those responses
+are not evidence that a file was read. The evidence record keeps response,
+configuration and artifact verification separate.
+
+## Target baseline
+
+The initial arrangements target `codex-cli 0.155.0-alpha.3.10` with Multi-Agent V2.
+Model names and reasoning efforts are explicit in each TOML; availability depends
+on the installing account and runtime. An unavailable model is an error to resolve,
+not permission to substitute a different model silently.
+
+The fragments set `features.multi_agent_v2.max_concurrent_threads_per_session`
+to 6 and 7. The target binary's prompt-input output confirms those are total
+slots including the lead: at most 5 and 6 concurrent children, respectively.
+The legacy `agents.max_concurrent_threads_per_session` is a child cap; this
+binary adds one when translating it into a V2 total. Mixing the two settings
+would misstate capacity. The [pinned configuration resolver](https://github.com/openai/codex/blob/b979d4f1f04538ba5a5fcc434d499c007bfe1b8c/codex-rs/core/src/config/mod.rs#L2500)
+explains that translation. Prompt-input inspection proves configuration resolution,
+not running-child saturation or slot release; those require separate live probes.
+
+## Executable checks
+
+```text
+python -X utf8 scripts/validate_catalog.py
+python -X utf8 scripts/validate_components.py
+python -X utf8 -m unittest discover -s tests -v
+```
+
+The validator checks real package references, configuration parsing and selected
+private-dependency patterns in manifest-referenced configuration, instructions,
+role cards, skill instructions and hook documentation. This is not a comprehensive
+secret scanner: review the entire proposed diff, including READMEs, examples,
+licenses and supplemental files, before publishing. Unit tests exercise malformed and escaping configurations
+and the hook process's allow/deny contract. CI runs these without account
+credentials; it does not start paid model sessions.
+
+Component preflight checks standalone skill files and optional plugin package
+structure. It does not parse YAML frontmatter or replace upstream schema and
+real installation checks. The first release has two standalone skills and zero
+plugin bundles; zero plugins is not a passing plugin integration test. Directory
+escape tests use real symlinks where available and a Windows junction otherwise.
+
+## Runtime acceptance
+
+For a fully runtime-validated release, evidence must identify the exact CLI, date and platform
+and show:
+
+1. User and project installation load the declared roles and effective settings.
+2. A read-only explorer, authorized implementer and independent reviewer return
+   artifacts that the parent verifies.
+3. The optional hook intercepts a permitted spawn and rejects a disallowed spawn
+   through the real V2 tool path.
+4. Concurrency measurements distinguish running children from completed threads
+   and state whether the root occupies a slot.
+
+Record the actual tool events and resolved configuration. Model self-reports,
+silent hooks or an empty test selection do not establish these claims. Publish
+only a sanitized report; keep authentication and raw sessions out of the catalog.
diff --git a/docs/windows-sandbox.md b/docs/windows-sandbox.md
new file mode 100644
index 0000000..7f7d49e
--- /dev/null
+++ b/docs/windows-sandbox.md
@@ -0,0 +1,60 @@
+# Windows sandbox startup and temporary directories
+
+Keep the sandbox enabled when testing an arrangement. A model that replies, or
+a command that runs outside the sandbox, does not prove sandboxed tool execution.
+
+## Measured startup failure
+
+On Windows with Codex `0.155.0-alpha.3.10`, the isolated validation runner inherited
+the host's shared `TEMP` and `TMP`. Even a sandboxed `cmd.exe /d /c echo` exceeded
+20- and 40-second deadlines. The process was active: a six-second observation
+recorded about 136,000 additional non-read/write I/O operations, with unchanged
+ordinary read and write counts. This is consistent with metadata preparation,
+but the counters alone do not identify the paths or operations.
+
+Changing only the child process's `TEMP` and `TMP` to an owned empty directory
+made the identical command return the expected output with exit code 0. Its
+native sandbox log recorded 66 ms between `START` and `SUCCESS`. The workspace
+permission profile, Windows sandbox backend and private desktop were unchanged.
+This identifies a temporary-directory-dependent startup problem; it does not
+prove which internal enumeration or ACL operation was responsible.
+
+## Separate Store PowerShell limitation
+
+After that correction, the Store/MSIX build of PowerShell 7.6.6 still failed
+before execution with `CreateProcessAsUserW failed: -1073283067`; its App Execution
+Alias failed with error 5. In the same sandbox, `cmd.exe` succeeded. These outcomes
+were unchanged with or without the test's Windows Job Object.
+
+A Microsoft-signed official ZIP of the same PowerShell version succeeded in one
+diagnostic comparison. That was a packaging contrast, not an installation change
+or a substitute for testing the Store shell. The existing Store installation and
+global PATH were preserved. The independent native artifact review remains unverified.
+An earlier [upstream user report](https://github.com/openai/codex/issues/35871)
+describes a similar failure; it is not a maintainer-confirmed resolution.
+
+## Isolate test runners
+
+For an isolated Codex test process:
+
+1. Create a new, unique temporary directory inside the test's owned area.
+2. Set both `TEMP` and `TMP` in the environment passed to Codex itself, before
+   sandbox initialization. Setting them only in the eventual shell is too late.
+3. Keep the directory alive until that root and all its children have exited.
+4. Apply a bounded deadline and terminate only the process tree the test started.
+5. Remove only the owned temporary directory after execution ends.
+
+Do not change user- or machine-wide environment variables, purge the host's Temp
+directory, kill unrelated console processes, or disable sandbox controls. A test
+that needs a preexisting temporary artifact must receive that input explicitly;
+it should not depend on the host's shared temporary files.
+
+This is a test-runner isolation measure, not an extra arrangement TOML setting.
+Use the [runtime evidence](runtime-evidence.json) to distinguish this command
+check from the separate native agent, artifact and capacity scenarios.
+
+The [official Windows sandbox guide](https://learn.chatgpt.com/docs/windows/windows-sandbox)
+explains supported backends and diagnostic logs. The exact tested CLI tag resolves
+to [this source commit](https://github.com/openai/codex/tree/f5e8906cd6ccfdd6e6f61c8ce44ea6b1ef1912c0).
+Microsoft documents the [distinct PowerShell installation packages](https://learn.microsoft.com/en-us/powershell/scripting/install/install-powershell-on-windows?view=powershell-7.6);
+the diagnostic ZIP came from the [official 7.6.6 release](https://github.com/PowerShell/PowerShell/releases/tag/v7.6.6).
diff --git a/hooks/spawn-contract/README.md b/hooks/spawn-contract/README.md
new file mode 100644
index 0000000..2a9ff6c
--- /dev/null
+++ b/hooks/spawn-contract/README.md
@@ -0,0 +1,90 @@
+# Optional spawn contract
+
+This command hook checks the arguments of intercepted Codex spawn calls. It is
+independent of the arrangement's agent files and optional to install.
+
+It allows an explicit nonblank `agent_type` with `fork_turns: "none"`. It denies
+missing roles, history forks, `fork_context`, and call-level `model`,
+`reasoning_effort` or `model_reasoning_effort` fields. Models and efforts belong
+in the selected role's TOML. It does not rewrite the task or the message.
+
+The hook does not validate model quality, inspect task content, grant permissions,
+verify that a role exists, count threads, or detect whether the caller is a child.
+Only-the-lead-delegates remains an instruction. Unrelated tools are left alone.
+
+## Install and review
+
+1. Install Python 3.11+ if needed. Copy `guard.py` to a stable local directory.
+2. Adapt `hooks.example.json`: replace the Python command and script placeholder
+   with the real paths on your machine. Use a quoted absolute script path; on
+   Windows, forward slashes in JSON avoid unnecessary escaping. For example,
+   `python -X utf8 "/path with spaces/spawn-contract/guard.py"`.
+3. Merge the `PreToolUse` group into your user or trusted project `hooks.json`.
+   Preserve existing hooks. Do not use the example's placeholder literally.
+4. Merge `hooks = true` into `[features]` in that scope's `config.toml` if it is
+   not already enabled. Restart Codex, open `/hooks`, inspect the script and
+   command, and trust this exact definition.
+5. Run the tests and real integration check below. A changed definition requires
+   review again; do not reuse another installation's trust hash.
+
+No hook is installed automatically by copying an arrangement. No trust bypass
+is part of the installation procedure.
+
+## Contract and tests
+
+Input is one JSON object on standard input. The handler has no arguments,
+external dependencies, network calls or persistent log. The example runtime
+timeout is five seconds and input is bounded to one MiB. Denials are returned as
+`hookSpecificOutput.permissionDecision = "deny"` for `PreToolUse`; allowed or
+unrelated calls return zero with no output. Malformed envelopes return a denial
+without echoing their contents.
+
+From the repository root:
+
+```text
+python -X utf8 -m unittest discover -s tests -p test_spawn_contract.py -v
+```
+
+An integration check must additionally show both:
+
+- A native spawn with explicit role and `fork_turns: "none"` reaches the child
+  and returns its result.
+- A native spawn using a history fork is rejected by this hook before the child
+  starts. The tool record must show the `Spawn contract:` reason.
+
+Use an isolated disposable project and a dedicated validation conversation.
+The negative case deliberately probes the hook's refusal; do not ask an agent to
+ignore unrelated authorization or safety controls. A refusal by the model before
+calling the tool does not prove hook interception. A TOML parse or the subprocess
+unit tests do not prove interception either.
+
+## Coverage and limits
+
+The example matches `spawn_agent`, `Agent`, `agents.spawn_agent`,
+`functions.spawn_agent` and `agentsspawn_agent`. The last name was observed in a
+real `PreToolUse` event on `codex-cli 0.155.0-alpha.3.10` with V2 namespace `agents`:
+the runtime flattens the namespace instead of supplying the traditional spawn
+identity. See the [upstream report](https://github.com/openai/codex/issues/36519).
+Matching only `spawn_agent` or `Agent` missed that measured native call.
+
+Use the exact hook tool name from the tested runtime, not a substring matcher
+that might catch unrelated MCP tools. If you change `tool_namespace`, verify its
+emitted identity and adjust both the matcher and guard before relying on this hook.
+
+The [official hooks documentation](https://learn.chatgpt.com/docs/hooks#tool-coverage)
+describes `spawn_agent`/`Agent` interception but warns that specialized tool paths
+can opt out. See this repository's [validation record](../../docs/validation.md)
+for the actual supported baseline and measured outcomes.
+
+Hook discovery, enabled state, trust, interpreter availability and runtime
+interception all matter. A disabled, untrusted or failing handler is not an
+enforcement boundary. The runtime may continue after a hook infrastructure
+failure. Treat warnings and a failed negative check as a broken installation,
+not proof that malformed spawns are blocked.
+
+## Remove
+
+Remove only this matcher/handler from hooks.json and its corresponding trust
+entry through the normal hook UI. Remove the script when no configuration
+references it. Preserve other handlers and do not turn off all hooks. Restart
+Codex to verify the configuration.
diff --git a/hooks/spawn-contract/guard.py b/hooks/spawn-contract/guard.py
new file mode 100644
index 0000000..978b765
--- /dev/null
+++ b/hooks/spawn-contract/guard.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+"""Validate explicit-role, fresh-context spawn calls received by Codex hooks."""
+
+import json
+import sys
+
+
+MAX_INPUT_BYTES = 1024 * 1024
+SPAWN_NAMES = {"spawn_agent", "Agent", "agents.spawn_agent", "functions.spawn_agent",
+               "agentsspawn_agent"}
+OVERRIDES = {"model", "reasoning_effort", "model_reasoning_effort", "fork_context"}
+
+
+def rejection(payload):
+    if not isinstance(payload, dict):
+        return "Spawn contract: expected a hook object."
+    event = payload.get("hook_event_name")
+    if not isinstance(event, str) or not event:
+        return "Spawn contract: missing hook event."
+    if event != "PreToolUse":
+        return None
+    tool = payload.get("tool_name")
+    if not isinstance(tool, str) or not tool:
+        return "Spawn contract: missing tool name."
+    if tool not in SPAWN_NAMES:
+        return None
+    args = payload.get("tool_input")
+    if not isinstance(args, dict):
+        return "Spawn contract: expected structured spawn arguments."
+    role = args.get("agent_type")
+    if not isinstance(role, str) or not role.strip():
+        return "Spawn contract: select an explicit agent_type from the available roles."
+    if args.get("fork_turns") != "none":
+        return 'Spawn contract: set fork_turns to "none" and put necessary context in the brief.'
+    if OVERRIDES.intersection(args):
+        return "Spawn contract: omit model/effort overrides and fork_context; use the role TOML."
+    return None
+
+
+def main():
+    try:
+        raw = sys.stdin.buffer.read(MAX_INPUT_BYTES + 1)
+        if len(raw) > MAX_INPUT_BYTES:
+            reason = "Spawn contract: hook input exceeds the size limit."
+        else:
+            reason = rejection(json.loads(raw))
+    except (ValueError, UnicodeError, OSError, RecursionError):
+        reason = "Spawn contract: unreadable or malformed hook input."
+    if reason:
+        print(json.dumps({"hookSpecificOutput": {
+            "hookEventName": "PreToolUse", "permissionDecision": "deny",
+            "permissionDecisionReason": reason,
+        }}))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/hooks/spawn-contract/hooks.example.json b/hooks/spawn-contract/hooks.example.json
new file mode 100644
index 0000000..7d3e886
--- /dev/null
+++ b/hooks/spawn-contract/hooks.example.json
@@ -0,0 +1,16 @@
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "^(Agent|spawn_agent|agents\\.spawn_agent|functions\\.spawn_agent|agentsspawn_agent)$",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "python -X utf8 /ABSOLUTE/PATH/spawn-contract/guard.py",
+            "timeout": 5
+          }
+        ]
+      }
+    ]
+  }
+}
diff --git a/plugins/README.md b/plugins/README.md
new file mode 100644
index 0000000..e5c9644
--- /dev/null
+++ b/plugins/README.md
@@ -0,0 +1,82 @@
+# Optional workflow plugins
+
+This directory accepts self-contained plugin contributions that improve an agent
+workflow. A plugin may package skills, public MCP connections, lifecycle hooks,
+or a useful combination. Plugins are separate from arrangements and optional;
+the initial release has no installable plugin bundle or marketplace entry.
+Standalone skills already live in [skills/](../skills/README.md).
+
+## Choose the supported package format
+
+The [official packaging guide](https://developers.openai.com/plugins/build/plugins),
+checked on 2026-09-12, recommends the portable Agent Plugins format for new
+packages. It also documents the supported Codex compatibility format generated
+by the built-in plugin creator. State your format and tested runtime explicitly:
+support in current documentation is not proof for every older Codex release.
+
+```text
+plugins/<plugin-name>/
+  plugin.json                 portable manifest
+  skills/<skill-name>/         optional bundled skills
+  mcp.json                    optional portable MCP configuration
+  hooks/hooks.json            optional lifecycle hooks
+  scripts/                    optional executable implementation
+  assets/                     optional package assets
+  README.md                   installation, access, evidence and removal
+  LICENSE                     license; include notices for derived components
+```
+
+For a portable package, declare the Agent Plugins schema in root `plugin.json`.
+OpenAI-specific presentation, registered connection mappings and hook settings
+belong in `extensions.com.openai`. Portable skills and MCP use the fixed root
+locations `skills/` and `mcp.json`.
+
+The Codex compatibility layout instead uses `.codex-plugin/plugin.json` and can
+use `.mcp.json`. Its manifest directory contains only the manifest, not the
+skills or hook scripts. Do not rename `.mcp.json` to `mcp.json` as a migration:
+the portable MCP format also requires each server's transport `type`. If both
+manifest formats exist, document precedence; the OpenAI inline extension replaces
+the compatibility overlay, rather than merging both configurations.
+
+## Contribution contract
+
+1. Add a uniquely named folder whose name matches the manifest's plugin name.
+   Include meaningful version, description, author and license metadata.
+2. Package only capabilities the workflow needs. Keep referenced files inside
+   the plugin; no personal absolute paths, escaping symlinks or references into
+   a contributor's installed Codex home.
+3. Document each MCP server's purpose, transport, permissions, external data flow,
+   authentication setup and possible cost. Never include tokens, cookies, login
+   caches, private endpoints or automatic credential copying. Local server
+   dependencies need explicit, reproducible installation and version evidence.
+4. Document hook events, matchers, commands and failure behavior. Installation
+   does not establish trust: users must review and trust the exact definition.
+   Use the runtime's plugin-root mechanism for script paths; do not copy trusted
+   hashes or claim hooks provide a security sandbox.
+5. Include license/provenance for bundled skills and scripts. When packaging a
+   shared catalog skill, name its canonical source and reproducible packaging
+   step; the installed bundle must not depend on a sibling directory.
+6. Supply installation, update, disable/removal and rollback instructions, plus
+   exact runtime/platform/date and sanitized evidence for the capabilities
+   actually shipped. MCP evidence must reach a real authorized server; hooks
+   need real interception and negative-path evidence, not only script tests.
+
+Run `python -X utf8 scripts/validate_components.py` from the repository root for
+structural preflight, then the current upstream schema/authoring validator for
+your chosen format and real installation tests. Preflight does not execute plugin
+commands or establish complete schema, security, authentication or runtime support.
+Follow [Contributing](../CONTRIBUTING.md) to submit a focused PR.
+
+## Distribution and installation
+
+A reviewed plugin can be distributed through a repo/team marketplace following
+the official guide. Declare each entry as available for optional installation;
+do not install it by default or modify a user's personal marketplace on their
+behalf. An empty directory is not an installable marketplace: this repository
+does not advertise a marketplace installation command before a real plugin and
+validated entry exist.
+
+Publishing here is separate from submission to OpenAI's universal directory.
+See [official plugin submission](https://developers.openai.com/plugins/deploy/submission)
+for that additional review process. Never imply that a community contribution is
+endorsed or approved by OpenAI.
diff --git a/scripts/validate_catalog.py b/scripts/validate_catalog.py
new file mode 100644
index 0000000..30cf265
--- /dev/null
+++ b/scripts/validate_catalog.py
@@ -0,0 +1,534 @@
+#!/usr/bin/env python3
+"""Validate the public arrangement catalog with Python's standard library."""
+
+from __future__ import annotations
+
+import argparse
+import re
+import sys
+import tomllib
+from dataclasses import dataclass
+from pathlib import Path, PurePosixPath, PureWindowsPath
+from typing import Any
+
+
+MANIFEST_TEXT_FIELDS = {
+    "id",
+    "version",
+    "author",
+    "description",
+    "license",
+    "codex_version",
+}
+ROLE_FIELDS = {
+    "name",
+    "description",
+    "model",
+    "model_reasoning_effort",
+    "developer_instructions",
+}
+ROLE_ALLOWED_FIELDS = ROLE_FIELDS | {"nickname_candidates"}
+NICKNAME_CANDIDATE_PATTERN = re.compile(r"^[A-Za-z0-9 _-]+$")
+CONFIG_FIELDS = {"model", "model_reasoning_effort", "features", "agents"}
+FEATURE_FIELDS = {"multi_agent", "multi_agent_v2"}
+V2_FIELDS = {
+    "enabled",
+    "tool_namespace",
+    "max_concurrent_threads_per_session",
+}
+AGENT_FIELDS = {
+    "default_subagent_model",
+    "default_subagent_reasoning_effort",
+}
+NONPUBLIC_PAYLOAD_PATTERNS = (
+    (
+        re.compile(
+            r"(?:~|\$HOME|%USERPROFILE%)[\\/]"
+            r"\.(?!(?:codex|agents)(?:[\\/]|$))[A-Za-z0-9_.-]+(?:[\\/]|$)",
+            re.IGNORECASE,
+        ),
+        "nonpublic hidden-home directory",
+    ),
+    (
+        re.compile(r"(?:[A-Z]:[\\/]|/)[\\/]?users[\\/]", re.IGNORECASE),
+        "personal user path",
+    ),
+    (
+        re.compile(
+            r"""(?ix)
+            (?:^|[\\/])
+            (?:
+                \.env(?:\.[A-Za-z0-9_.-]+)?
+                |credentials?(?:\.[A-Za-z0-9_.-]+)?
+                |id_(?:rsa|ecdsa|ed25519)
+                |[A-Za-z0-9_.-]*(?:token|secret|api[_-]?key)[A-Za-z0-9_.-]*
+                    \.(?:json|toml|ya?ml|env)
+            )
+            (?=$|[\\/\s"',.)])
+            """
+        ),
+        "credential filename",
+    ),
+)
+ROLE_DEPENDENCY_PATTERN = re.compile(
+    r"""
+    (?:\.(?:codex|agents)[\\/](?:skills|plugins)[\\/])
+    |(?:\b(?:skills|plugins)[\\/][A-Za-z0-9_.-]+)
+    |(?:\b(?:mcp|providers?|skills?|plugins?)\.(?:json|toml|ya?ml)\b)
+    |(?:\b(?:mcp|provider|skill|plugin)_(?:config|server|path|name)\b)
+    |(?:\bconfig\.toml\b)
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
+
+
+@dataclass
+class ValidationResult:
+    arrangements: int
+    roles: int
+    errors: list[str]
+
+
+def validate_catalog(catalog_root: Path | str) -> ValidationResult:
+    """Return catalog counts and all deterministic contract violations."""
+
+    errors: list[str] = []
+    scanned: set[Path] = set()
+    try:
+        root = Path(catalog_root).resolve(strict=True)
+    except (OSError, RuntimeError) as exc:
+        errors.append(f"catalog root: cannot resolve {catalog_root}: {exc}")
+        return ValidationResult(0, 0, errors)
+    if not root.is_dir():
+        errors.append(f"catalog root: {root} is not a directory")
+        return ValidationResult(0, 0, errors)
+
+    arrangements_dir = _path(
+        root,
+        root / "arrangements",
+        "arrangements directory",
+        "directory",
+        errors,
+    )
+    if arrangements_dir is None:
+        return ValidationResult(0, 0, errors)
+    try:
+        entries = sorted(arrangements_dir.iterdir(), key=lambda item: item.name)
+    except OSError as exc:
+        errors.append(
+            f"{_label(arrangements_dir, root)}: cannot read arrangement directory: {exc}"
+        )
+        return ValidationResult(0, 0, errors)
+
+    arrangements = 0
+    roles = 0
+    for entry in entries:
+        try:
+            is_directory = entry.is_dir()
+        except OSError as exc:
+            errors.append(f"arrangement entry {entry}: cannot inspect: {exc}")
+            continue
+        if not is_directory:
+            continue
+
+        arrangement_dir = _path(root, entry, "arrangement directory", "directory", errors)
+        if arrangement_dir is None:
+            continue
+        manifest = _path(
+            root,
+            arrangement_dir / "arrangement.toml",
+            "arrangement manifest",
+            "file",
+            errors,
+        )
+        if manifest is None:
+            continue
+        arrangements += 1
+
+        data = _read_toml(manifest, root, errors)
+        if data is None:
+            continue
+        _scan(manifest, root, scanned, errors)
+        roles += _validate_arrangement(
+            root,
+            entry.name,
+            manifest,
+            data,
+            scanned,
+            errors,
+        )
+
+    if arrangements == 0:
+        errors.append("catalog has no readable arrangements/<id>/arrangement.toml files")
+    return ValidationResult(arrangements, roles, errors)
+
+
+def _validate_arrangement(
+    root: Path,
+    directory_name: str,
+    manifest: Path,
+    data: dict[str, Any],
+    scanned: set[Path],
+    errors: list[str],
+) -> int:
+    label = _label(manifest, root)
+    if type(data.get("schema_version")) is not int or data.get("schema_version") != 1:
+        errors.append(f"{label}: 'schema_version' must be the integer 1")
+    for field in sorted(MANIFEST_TEXT_FIELDS):
+        if not _text(data.get(field)):
+            errors.append(f"{label}: '{field}' must be a nonempty string")
+    if _text(data.get("id")) and data["id"] != directory_name:
+        errors.append(f"{label}: 'id' must match its arrangement directory ({directory_name!r})")
+    config = _reference(root, manifest, data.get("config"), "config", "file", errors)
+    agents = _reference(root, manifest, data.get("agents"), "agents", "directory", errors)
+    instructions = _reference(
+        root,
+        manifest,
+        data.get("instructions"),
+        "instructions",
+        "file",
+        errors,
+    )
+    for path in (config, instructions):
+        if path is not None:
+            _scan(path, root, scanned, errors)
+
+    if "optional_skill" in data:
+        errors.append(f"{label}: 'optional_skill' is unsupported; use 'optional_skills'")
+    optional_skills = data.get("optional_skills")
+    with_skill = data.get("instructions_with_skill")
+    if optional_skills is None:
+        if with_skill is not None:
+            errors.append(
+                f"{label}: 'instructions_with_skill' requires a nonempty "
+                "'optional_skills' list"
+            )
+    elif not isinstance(optional_skills, list) or not optional_skills:
+        errors.append(f"{label}: 'optional_skills' must be a nonempty list of relative paths")
+        if with_skill is not None:
+            errors.append(
+                f"{label}: 'instructions_with_skill' requires a nonempty "
+                "'optional_skills' list"
+            )
+    else:
+        for index, optional_skill in enumerate(optional_skills):
+            skill_dir = _reference(
+                root,
+                manifest,
+                optional_skill,
+                f"optional_skills[{index}]",
+                "directory",
+                errors,
+            )
+            if skill_dir is not None:
+                skill_file = _path(
+                    root,
+                    skill_dir / "SKILL.md",
+                    f"{label}: optional_skills[{index}] SKILL.md",
+                    "file",
+                    errors,
+                )
+                if skill_file is not None:
+                    _scan(skill_file, root, scanned, errors)
+        if with_skill is not None:
+            skill_instructions = _reference(
+                root,
+                manifest,
+                with_skill,
+                "instructions_with_skill",
+                "file",
+                errors,
+            )
+            if skill_instructions is not None:
+                _scan(skill_instructions, root, scanned, errors)
+
+    if data.get("optional_hook") is not None:
+        hook_dir = _reference(
+            root,
+            manifest,
+            data["optional_hook"],
+            "optional_hook",
+            "directory",
+            errors,
+        )
+        if hook_dir is not None:
+            hook_readme = _path(
+                root,
+                hook_dir / "README.md",
+                f"{label}: optional_hook README.md",
+                "file",
+                errors,
+            )
+            if hook_readme is not None:
+                _scan(hook_readme, root, scanned, errors)
+
+    if config is not None:
+        config_data = _read_toml(config, root, errors)
+        if config_data is not None:
+            _validate_config(config, root, config_data, errors)
+    return _validate_roles(agents, root, scanned, errors) if agents is not None else 0
+
+
+def _validate_config(path: Path, root: Path, data: dict[str, Any], errors: list[str]) -> None:
+    label = _label(path, root)
+    _keys(data, CONFIG_FIELDS, label, "config", errors, required=CONFIG_FIELDS - {"agents"})
+    for field in ("model", "model_reasoning_effort"):
+        if not _text(data.get(field)):
+            errors.append(f"{label}: config '{field}' must be a nonempty string")
+
+    features = data.get("features")
+    if not isinstance(features, dict):
+        errors.append(f"{label}: config 'features' must be a table")
+    else:
+        _keys(features, FEATURE_FIELDS, label, "features", errors)
+        if type(features.get("multi_agent")) is not bool:
+            errors.append(f"{label}: features 'multi_agent' must be a boolean")
+        v2 = features.get("multi_agent_v2")
+        if not isinstance(v2, dict):
+            errors.append(f"{label}: features 'multi_agent_v2' must be a table")
+        else:
+            _keys(v2, V2_FIELDS, label, "features.multi_agent_v2", errors)
+            if v2.get("enabled") is not True:
+                errors.append(f"{label}: features.multi_agent_v2 'enabled' must be true")
+            if not _text(v2.get("tool_namespace")):
+                errors.append(
+                    f"{label}: features.multi_agent_v2 'tool_namespace' must be a nonempty string"
+                )
+            capacity = v2.get("max_concurrent_threads_per_session")
+            if type(capacity) is not int or capacity <= 0:
+                errors.append(
+                    f"{label}: features.multi_agent_v2 "
+                    "'max_concurrent_threads_per_session' must be a positive integer"
+                )
+
+    agents = data.get("agents")
+    if agents is None:
+        return
+    if not isinstance(agents, dict):
+        errors.append(f"{label}: config 'agents' must be a table")
+        return
+    _keys(agents, AGENT_FIELDS, label, "agents", errors, required=set())
+    for field in (
+        "default_subagent_model",
+        "default_subagent_reasoning_effort",
+    ):
+        if field in agents and not _text(agents[field]):
+            errors.append(f"{label}: agents '{field}' must be a nonempty string when present")
+
+
+def _validate_roles(
+    agents_dir: Path,
+    root: Path,
+    scanned: set[Path],
+    errors: list[str],
+) -> int:
+    try:
+        candidates = sorted(agents_dir.glob("*.toml"), key=lambda item: item.name)
+    except OSError as exc:
+        errors.append(f"{_label(agents_dir, root)}: cannot read role TOMLs: {exc}")
+        return 0
+    if not candidates:
+        errors.append(f"{_label(agents_dir, root)}: contains no role TOML files")
+        return 0
+
+    names: set[str] = set()
+    for candidate in candidates:
+        path = _path(root, candidate, "role TOML", "file", errors)
+        if path is None:
+            continue
+        _scan(path, root, scanned, errors)
+        role = _read_toml(path, root, errors)
+        if role is None:
+            continue
+
+        label = _label(path, root)
+        _keys(role, ROLE_ALLOWED_FIELDS, label, "role", errors, required=ROLE_FIELDS)
+        for field in sorted(ROLE_FIELDS):
+            if not _text(role.get(field)):
+                errors.append(f"{label}: role '{field}' must be a nonempty string")
+        nickname_candidates = role.get("nickname_candidates")
+        if "nickname_candidates" in role:
+            if not isinstance(nickname_candidates, list) or not nickname_candidates:
+                errors.append(
+                    f"{label}: role 'nickname_candidates' must be a nonempty list of strings"
+                )
+            else:
+                seen_candidates: set[str] = set()
+                for index, nickname_candidate in enumerate(nickname_candidates):
+                    if not isinstance(nickname_candidate, str):
+                        errors.append(
+                            f"{label}: nickname_candidates[{index}] must be a string"
+                        )
+                        continue
+                    normalized_candidate = nickname_candidate.strip()
+                    if not normalized_candidate:
+                        errors.append(
+                            f"{label}: nickname_candidates[{index}] "
+                            "must not be blank after trimming"
+                        )
+                        continue
+                    if normalized_candidate in seen_candidates:
+                        errors.append(
+                            f"{label}: nickname_candidates[{index}] duplicates "
+                            f"{normalized_candidate!r} after trimming"
+                        )
+                    seen_candidates.add(normalized_candidate)
+                    if NICKNAME_CANDIDATE_PATTERN.fullmatch(normalized_candidate) is None:
+                        errors.append(
+                            f"{label}: nickname_candidates[{index}] "
+                            "contains unsupported characters"
+                        )
+        name = role.get("name")
+        if _text(name):
+            if path.stem != name:
+                errors.append(f"{label}: role filename must match name {name!r}")
+            if name in names:
+                errors.append(f"{label}: duplicate role name {name!r}")
+            names.add(name)
+        for field, value in role.items():
+            if not isinstance(value, str):
+                continue
+            match = ROLE_DEPENDENCY_PATTERN.search(value)
+            if match is not None:
+                errors.append(
+                    f"{label}: role '{field}' contains dependency/config reference "
+                    f"{match.group(0)!r}"
+                )
+    return len(candidates)
+
+
+def _keys(
+    data: dict[str, Any],
+    allowed: set[str],
+    label: str,
+    section: str,
+    errors: list[str],
+    *,
+    required: set[str] | None = None,
+) -> None:
+    required = allowed if required is None else required
+    for field in sorted(required - data.keys()):
+        errors.append(f"{label}: {section} is missing required key {field!r}")
+    for field in sorted(data.keys() - allowed):
+        errors.append(f"{label}: {section} has unsupported key {field!r}")
+
+
+def _reference(
+    root: Path,
+    manifest: Path,
+    value: Any,
+    field: str,
+    kind: str,
+    errors: list[str],
+) -> Path | None:
+    label = _label(manifest, root)
+    if not _text(value):
+        errors.append(f"{label}: '{field}' must be a nonempty relative path")
+        return None
+    if _absolute(value):
+        errors.append(f"{label}: '{field}' must not be an absolute path")
+        return None
+    candidate = manifest.parent / Path(value.replace("\\", "/"))
+    return _path(root, candidate, f"{label}: '{field}' reference", kind, errors)
+
+
+def _path(
+    root: Path,
+    candidate: Path,
+    description: str,
+    kind: str,
+    errors: list[str],
+) -> Path | None:
+    try:
+        resolved = candidate.resolve(strict=False)
+    except (OSError, RuntimeError) as exc:
+        errors.append(f"{description}: cannot resolve {candidate}: {exc}")
+        return None
+    try:
+        resolved.relative_to(root)
+    except ValueError:
+        errors.append(f"{description}: resolves outside catalog root")
+        return None
+
+    try:
+        exists = candidate.exists()
+        matches_kind = candidate.is_file() if kind == "file" else candidate.is_dir()
+    except OSError as exc:
+        errors.append(f"{description}: cannot inspect {candidate}: {exc}")
+        return None
+    if not exists:
+        errors.append(f"{description}: does not exist")
+        return None
+    if not matches_kind:
+        errors.append(f"{description}: must be a {kind}")
+        return None
+    try:
+        return candidate.resolve(strict=True)
+    except (OSError, RuntimeError) as exc:
+        errors.append(f"{description}: cannot resolve {candidate}: {exc}")
+        return None
+
+
+def _read_toml(path: Path, root: Path, errors: list[str]) -> dict[str, Any] | None:
+    try:
+        with path.open("rb") as source:
+            return tomllib.load(source)
+    except (tomllib.TOMLDecodeError, UnicodeError) as exc:
+        errors.append(f"{_label(path, root)}: invalid TOML: {exc}")
+    except OSError as exc:
+        errors.append(f"{_label(path, root)}: cannot read TOML: {exc}")
+    return None
+
+
+def _scan(path: Path, root: Path, scanned: set[Path], errors: list[str]) -> None:
+    if path in scanned:
+        return
+    scanned.add(path)
+    try:
+        payload = path.read_text(encoding="utf-8")
+    except (OSError, UnicodeError) as exc:
+        errors.append(f"{_label(path, root)}: public payload is not UTF-8 readable: {exc}")
+        return
+    for pattern, description in NONPUBLIC_PAYLOAD_PATTERNS:
+        match = pattern.search(payload)
+        if match is not None:
+            line = payload.count("\n", 0, match.start()) + 1
+            errors.append(f"{_label(path, root)}:{line}: public payload contains {description}")
+
+
+def _text(value: Any) -> bool:
+    return isinstance(value, str) and bool(value.strip())
+
+
+def _absolute(value: str) -> bool:
+    windows = PureWindowsPath(value)
+    return PurePosixPath(value).is_absolute() or bool(windows.drive or windows.root)
+
+
+def _label(path: Path, root: Path) -> str:
+    try:
+        return path.resolve(strict=False).relative_to(root).as_posix()
+    except (OSError, RuntimeError, ValueError):
+        return str(path)
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description="Validate the public arrangement catalog.")
+    parser.add_argument(
+        "--root",
+        type=Path,
+        default=Path(__file__).resolve().parents[1],
+        help="catalog root (defaults to the repository root)",
+    )
+    result = validate_catalog(parser.parse_args(argv).root)
+    print(f"Catalog: {result.arrangements} arrangements, {result.roles} roles.")
+    if result.errors:
+        for error in result.errors:
+            print(f"ERROR: {error}", file=sys.stderr)
+        return 1
+    print("Catalog validation passed.")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/scripts/validate_components.py b/scripts/validate_components.py
new file mode 100644
index 0000000..ef75fe1
--- /dev/null
+++ b/scripts/validate_components.py
@@ -0,0 +1,475 @@
+#!/usr/bin/env python3
+"""Check public standalone skills and optional plugin package structure."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+from dataclasses import dataclass
+from pathlib import Path, PurePosixPath, PureWindowsPath
+from typing import Any
+
+
+PORTABLE_PLUGIN_SCHEMA = "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json"
+LICENSE_OR_PROVENANCE = (
+    "LICENSE",
+    "LICENSE.md",
+    "LICENSE.txt",
+    "NOTICE",
+    "NOTICE.md",
+    "PROVENANCE",
+    "PROVENANCE.md",
+)
+
+
+@dataclass
+class ComponentValidationResult:
+    skills: int
+    plugins: int
+    errors: list[str]
+
+
+def validate_components(catalog_root: Path | str) -> ComponentValidationResult:
+    """Return local component counts and structural violations only."""
+
+    errors: list[str] = []
+    try:
+        root = Path(catalog_root).resolve(strict=True)
+    except (OSError, RuntimeError) as exc:
+        return ComponentValidationResult(0, 0, [f"catalog root: cannot resolve {catalog_root}: {exc}"])
+    if not root.is_dir():
+        return ComponentValidationResult(0, 0, [f"catalog root: {root} is not a directory"])
+    return ComponentValidationResult(
+        _skills(root, root / "skills", root, "catalog root", errors),
+        _plugins(root, errors),
+        errors,
+    )
+
+
+def _plugins(root: Path, errors: list[str]) -> int:
+    directory = root / "plugins"
+    if not _present(directory, root, errors):
+        return 0
+    directory = _safe(root, directory, "plugins directory", "directory", "catalog root", errors)
+    if directory is None:
+        return 0
+    try:
+        entries = sorted(directory.iterdir(), key=lambda item: item.name)
+    except OSError as exc:
+        errors.append(f"{_label(directory, root)}: cannot read plugin directory: {exc}")
+        return 0
+
+    count = 0
+    for entry in entries:
+        try:
+            if not entry.is_dir():
+                continue
+        except OSError as exc:
+            errors.append(f"{_label(entry, root)}: cannot inspect plugin entry: {exc}")
+            continue
+        count += 1
+        plugin = _safe(
+            root,
+            entry,
+            f"{_label(entry, root)}: plugin directory",
+            "directory",
+            "catalog root",
+            errors,
+        )
+        if plugin is not None:
+            _plugin(root, plugin, errors)
+    return count
+
+
+def _plugin(root: Path, plugin: Path, errors: list[str]) -> None:
+    label = _label(plugin, root)
+    _required_file(root, plugin, "README.md", errors)
+    if not any(_present(plugin / name, root, errors) for name in LICENSE_OR_PROVENANCE):
+        errors.append(f"{label}: requires a license or provenance file")
+    else:
+        for name in LICENSE_OR_PROVENANCE:
+            if _present(plugin / name, root, errors):
+                _safe(plugin, plugin / name, f"{label}: {name}", "file", "plugin directory", errors)
+                break
+
+    portable = _present(plugin / "plugin.json", root, errors)
+    manifest_path = plugin / "plugin.json" if portable else plugin / ".codex-plugin" / "plugin.json"
+    if not _present(manifest_path, root, errors):
+        errors.append(f"{label}: has no plugin.json or .codex-plugin/plugin.json manifest")
+        return
+    manifest = _safe(
+        plugin,
+        manifest_path,
+        f"{label}: {'plugin.json' if portable else '.codex-plugin/plugin.json'}",
+        "file",
+        "plugin directory",
+        errors,
+    )
+    if manifest is None:
+        return
+    data = _json_object(manifest, root, errors)
+    if data is None:
+        return
+    for field in ("name", "version", "description"):
+        if not _text(data.get(field)):
+            errors.append(f"{_label(manifest, root)}: manifest '{field}' must be a nonempty string")
+    if _text(data.get("name")) and data["name"] != plugin.name:
+        errors.append(f"{_label(manifest, root)}: manifest name must match plugin directory {plugin.name!r}")
+
+    if portable:
+        if data.get("$schema") != PORTABLE_PLUGIN_SCHEMA:
+            errors.append(
+                f"{_label(manifest, root)}: '$schema' must equal {PORTABLE_PLUGIN_SCHEMA!r}"
+            )
+        _portable(root, plugin, data, errors)
+    else:
+        _compatibility(root, plugin, data, errors)
+
+
+def _portable(root: Path, plugin: Path, data: dict[str, Any], errors: list[str]) -> None:
+    _skills(root, plugin / "skills", plugin, "plugin directory", errors)
+    _optional_json(root, plugin, plugin / "mcp.json", "mcp.json", errors)
+
+    settings, inline = _openai_settings(data, _label(plugin / "plugin.json", root), errors)
+    source = "extensions.com.openai"
+    if not inline:
+        settings = _overlay(root, plugin, errors)
+        source = ".codex-plugin/plugin.json"
+    if settings is not None:
+        _settings(root, plugin, settings, source, errors, allow_inline_mcp=True)
+    if settings is None or "hooks" not in settings:
+        _default_hooks(root, plugin, errors)
+
+
+def _compatibility(root: Path, plugin: Path, data: dict[str, Any], errors: list[str]) -> None:
+    if "skills" in data:
+        skills = _reference(plugin, data["skills"], "compatibility manifest 'skills'", "directory", errors)
+        if skills is not None:
+            _skills(root, skills, plugin, "plugin directory", errors)
+    else:
+        _skills(root, plugin / "skills", plugin, "plugin directory", errors)
+    _settings(root, plugin, data, "compatibility manifest", errors, allow_inline_mcp=True)
+    if "hooks" not in data:
+        _default_hooks(root, plugin, errors)
+
+
+def _openai_settings(
+    data: dict[str, Any], label: str, errors: list[str]
+) -> tuple[dict[str, Any] | None, bool]:
+    if "extensions" not in data:
+        return None, False
+    extensions = data["extensions"]
+    if not isinstance(extensions, dict):
+        errors.append(f"{label}: 'extensions' must be a JSON object when present")
+        return None, True
+    if "com.openai" not in extensions:
+        return None, False
+    settings = extensions["com.openai"]
+    if not isinstance(settings, dict):
+        errors.append(f"{label}: 'extensions.com.openai' must be a JSON object")
+        return None, True
+    return settings, True
+
+
+def _overlay(root: Path, plugin: Path, errors: list[str]) -> dict[str, Any] | None:
+    path = plugin / ".codex-plugin" / "plugin.json"
+    if not _present(path, root, errors):
+        return None
+    path = _safe(
+        plugin,
+        path,
+        f"{_label(plugin, root)}: .codex-plugin/plugin.json",
+        "file",
+        "plugin directory",
+        errors,
+    )
+    return _json_object(path, root, errors) if path is not None else None
+
+
+def _settings(
+    root: Path,
+    plugin: Path,
+    data: dict[str, Any],
+    label: str,
+    errors: list[str],
+    *,
+    allow_inline_mcp: bool,
+) -> None:
+    if "apps" in data:
+        _references(root, plugin, data["apps"], f"{label} 'apps'", "file", errors, json_file=True)
+    if "mcpServers" in data and not (
+        allow_inline_mcp and isinstance(data["mcpServers"], dict)
+    ):
+        _references(
+            root,
+            plugin,
+            data["mcpServers"],
+            f"{label} 'mcpServers'",
+            "file",
+            errors,
+            json_file=True,
+        )
+    if "hooks" in data:
+        values = data["hooks"] if isinstance(data["hooks"], list) else [data["hooks"]]
+        for index, value in enumerate(values):
+            suffix = f"[{index}]" if isinstance(data["hooks"], list) else ""
+            if isinstance(value, dict):
+                continue
+            if not isinstance(value, str):
+                errors.append(f"{label} 'hooks'{suffix}: must be a relative path or JSON object")
+                continue
+            path = _reference(plugin, value, f"{label} 'hooks'{suffix}", "file", errors)
+            if path is not None:
+                _json_object(path, root, errors)
+    if "interface" in data:
+        interface = data["interface"]
+        if not isinstance(interface, dict):
+            errors.append(f"{label} 'interface': must be a JSON object")
+        else:
+            for field in ("composerIcon", "logo", "logoDark", "screenshots"):
+                if field in interface:
+                    _references(
+                        root,
+                        plugin,
+                        interface[field],
+                        f"{label} 'interface' '{field}'",
+                        "file",
+                        errors,
+                        json_file=False,
+                    )
+
+
+def _default_hooks(root: Path, plugin: Path, errors: list[str]) -> None:
+    _optional_json(root, plugin, plugin / "hooks" / "hooks.json", "hooks/hooks.json", errors)
+
+
+def _optional_json(root: Path, plugin: Path, path: Path, name: str, errors: list[str]) -> None:
+    if not _present(path, root, errors):
+        return
+    path = _safe(
+        plugin,
+        path,
+        f"{_label(plugin, root)}: {name}",
+        "file",
+        "plugin directory",
+        errors,
+    )
+    if path is not None:
+        _json_object(path, root, errors)
+
+
+def _references(
+    root: Path,
+    plugin: Path,
+    value: Any,
+    label: str,
+    kind: str,
+    errors: list[str],
+    *,
+    json_file: bool,
+) -> None:
+    if isinstance(value, str):
+        values = [value]
+    elif isinstance(value, list) and all(isinstance(item, str) for item in value):
+        values = value
+    else:
+        errors.append(f"{label}: must be a relative path or list of relative paths")
+        return
+    for index, item in enumerate(values):
+        suffix = f"[{index}]" if len(values) > 1 else ""
+        path = _reference(plugin, item, f"{label}{suffix}", kind, errors)
+        if json_file and path is not None:
+            _json_object(path, root, errors)
+
+
+def _skills(
+    root: Path,
+    directory: Path,
+    boundary: Path,
+    boundary_name: str,
+    errors: list[str],
+) -> int:
+    if not _present(directory, root, errors):
+        return 0
+    directory = _safe(
+        boundary,
+        directory,
+        f"{_label(directory, root)}: skills directory",
+        "directory",
+        boundary_name,
+        errors,
+    )
+    if directory is None:
+        return 0
+    try:
+        entries = sorted(directory.iterdir(), key=lambda item: item.name)
+    except OSError as exc:
+        errors.append(f"{_label(directory, root)}: cannot read skills directory: {exc}")
+        return 0
+    count = 0
+    for entry in entries:
+        try:
+            if not entry.is_dir():
+                continue
+        except OSError as exc:
+            errors.append(f"{_label(entry, root)}: cannot inspect skill entry: {exc}")
+            continue
+        count += 1
+        skill = _safe(
+            boundary,
+            entry,
+            f"{_label(entry, root)}: skill directory",
+            "directory",
+            boundary_name,
+            errors,
+        )
+        if skill is None:
+            continue
+        path = skill / "SKILL.md"
+        if not _present(path, root, errors):
+            errors.append(f"{_label(skill, root)}: requires SKILL.md")
+            continue
+        path = _safe(
+            boundary,
+            path,
+            f"{_label(skill, root)}: SKILL.md",
+            "file",
+            boundary_name,
+            errors,
+        )
+        if path is None:
+            continue
+        try:
+            contents = path.read_text(encoding="utf-8")
+        except (OSError, UnicodeError) as exc:
+            errors.append(f"{_label(path, root)}: cannot read SKILL.md: {exc}")
+            continue
+        if not contents.strip():
+            errors.append(f"{_label(path, root)}: must be nonempty")
+    return count
+
+
+def _required_file(root: Path, plugin: Path, name: str, errors: list[str]) -> None:
+    path = plugin / name
+    if not _present(path, root, errors):
+        errors.append(f"{_label(plugin, root)}: requires {name}")
+        return
+    _safe(plugin, path, f"{_label(plugin, root)}: {name}", "file", "plugin directory", errors)
+
+
+def _reference(plugin: Path, value: Any, label: str, kind: str, errors: list[str]) -> Path | None:
+    if not _text(value):
+        errors.append(f"{label}: must be a nonempty relative path")
+        return None
+    if _absolute(value):
+        errors.append(f"{label}: must not be an absolute path")
+        return None
+    normalized = value.replace("\\", "/")
+    if ".." in PurePosixPath(normalized).parts:
+        errors.append(f"{label}: must not contain '..'")
+        return None
+    return _safe(plugin, plugin / Path(normalized), label, kind, "plugin directory", errors)
+
+
+def _safe(
+    boundary: Path,
+    candidate: Path,
+    label: str,
+    kind: str,
+    boundary_name: str,
+    errors: list[str],
+) -> Path | None:
+    try:
+        resolved = candidate.resolve(strict=False)
+        resolved.relative_to(boundary)
+    except ValueError:
+        errors.append(f"{label}: resolves outside {boundary_name}")
+        return None
+    except (OSError, RuntimeError) as exc:
+        errors.append(f"{label}: cannot resolve {candidate}: {exc}")
+        return None
+    try:
+        exists = candidate.exists()
+        correct_kind = candidate.is_file() if kind == "file" else candidate.is_dir()
+    except OSError as exc:
+        errors.append(f"{label}: cannot inspect {candidate}: {exc}")
+        return None
+    if not exists:
+        errors.append(f"{label}: does not exist")
+        return None
+    if not correct_kind:
+        errors.append(f"{label}: must be a {kind}")
+        return None
+    try:
+        return candidate.resolve(strict=True)
+    except (OSError, RuntimeError) as exc:
+        errors.append(f"{label}: cannot resolve {candidate}: {exc}")
+        return None
+
+
+def _json_object(path: Path, root: Path, errors: list[str]) -> dict[str, Any] | None:
+    try:
+        with path.open(encoding="utf-8") as source:
+            data = json.load(source)
+    except (json.JSONDecodeError, UnicodeError) as exc:
+        errors.append(f"{_label(path, root)}: invalid JSON: {exc}")
+        return None
+    except OSError as exc:
+        errors.append(f"{_label(path, root)}: cannot read JSON: {exc}")
+        return None
+    if not isinstance(data, dict):
+        errors.append(f"{_label(path, root)}: JSON value must be an object")
+        return None
+    return data
+
+
+def _present(path: Path, root: Path, errors: list[str]) -> bool:
+    try:
+        path.lstat()
+    except FileNotFoundError:
+        return False
+    except OSError as exc:
+        errors.append(f"{_label(path, root)}: cannot inspect {path}: {exc}")
+        return False
+    return True
+
+
+def _text(value: Any) -> bool:
+    return isinstance(value, str) and bool(value.strip())
+
+
+def _absolute(value: str) -> bool:
+    windows = PureWindowsPath(value)
+    return PurePosixPath(value).is_absolute() or bool(windows.drive or windows.root)
+
+
+def _label(path: Path, root: Path) -> str:
+    try:
+        return path.relative_to(root).as_posix()
+    except ValueError:
+        return str(path)
+
+
+def main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--root", type=Path, default=Path(__file__).resolve().parents[1])
+    result = validate_components(parser.parse_args(argv).root)
+    print(f"Components: skills={result.skills}, plugins={result.plugins}.")
+    if result.errors:
+        for error in result.errors:
+            print(f"ERROR: {error}", file=sys.stderr)
+        return 1
+    if result.skills or result.plugins:
+        print("Structural component preflight passed.")
+    else:
+        print("NOT APPLICABLE: no optional components were available to check.")
+    print(
+        "Limitations: this is not upstream-schema, security, command, network, "
+        "or runtime-compatibility verification; SKILL.md frontmatter is not parsed."
+    )
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/skills/README.md b/skills/README.md
new file mode 100644
index 0000000..45d6968
--- /dev/null
+++ b/skills/README.md
@@ -0,0 +1,47 @@
+# Optional workflow skills
+
+Skills are independent of arrangement names and versions. Install only those
+that help your work; neither initial arrangement requires one.
+
+| Skill | Use it when |
+| --- | --- |
+| [codex-orchestration](codex-orchestration/SKILL.md) | Selecting a role, dispatching a bounded task, or reconciling deliveries |
+| [pragmatic-programmer](pragmatic-programmer/SKILL.md) | Choosing a reversible design/change step, explaining a surprising green result, or checking shared knowledge, contracts and resource ownership |
+
+## Install and invoke
+
+Copy one complete skill directory, including its license and notice, into the
+user or project skill location in the [installation guide](../docs/installation.md).
+Verify the exact skill name appears in the runtime's available skills.
+
+In Codex, an explicit user request can name `$pragmatic-programmer` or
+`$codex-orchestration`. Agent-facing rules should tell the agent to invoke the
+named skill through the runtime's Skill tool **if that tool exists**; otherwise
+use the runtime's documented loading interface, including reading `SKILL.md`
+when that is the exposed mechanism. Do not invent a `Skill(...)` API or treat
+writing a name in a response as proof the skill loaded. See the
+[official skills guide](https://developers.openai.com/codex/skills).
+
+Use an arrangement's `AGENTS.with-skill.snippet.md` instead of its standalone
+snippet. Its optional engineering section adds the contextual Pragmatic
+Programmer trigger. Omit that section if you do not install the skill; the
+orchestration section can be used independently. Preserve the fallback if a skill
+may be absent in another installation. Do not paste a full skill into AGENTS.md.
+
+## Contribute a skill
+
+Add `skills/<skill-name>/SKILL.md` with valid `name` and `description` frontmatter;
+the name must match its directory. Keep the description specific to the situations
+that warrant loading the procedure. Put detailed references, scripts and assets
+in their respective subdirectories only when needed. Include license/provenance
+and any installation requirements without private paths or hidden dependencies.
+
+Keep the always-loaded instruction trigger short and put detailed procedure in
+the skill. Explain a positive use case and a similar situation that should not
+trigger it. Validate the skill format with current authoring tools and exercise
+the changed behavior; a prompt-only assessment is not an executable integration
+test. Follow [Contributing](../CONTRIBUTING.md) for review and evidence.
+
+If a plugin also distributes a skill from this catalog, declare its canonical
+source and packaging step. Do not maintain two editable copies of the same skill
+or make an installed plugin depend on files outside its package.
diff --git a/skills/codex-orchestration/LICENSE b/skills/codex-orchestration/LICENSE
new file mode 100644
index 0000000..b09cd78
--- /dev/null
+++ b/skills/codex-orchestration/LICENSE
@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/skills/codex-orchestration/NOTICE b/skills/codex-orchestration/NOTICE
new file mode 100644
index 0000000..e0fd984
--- /dev/null
+++ b/skills/codex-orchestration/NOTICE
@@ -0,0 +1,7 @@
+Codex Orchestration
+Copyright 2026 Rafael Bittencourt
+
+This public skill adapts general task-routing workflow concepts from Rafael
+Bittencourt's prior orchestration work. It is a self-contained adaptation and
+does not include internal infrastructure, local configuration, or operational
+data.
diff --git a/skills/codex-orchestration/SKILL.md b/skills/codex-orchestration/SKILL.md
new file mode 100644
index 0000000..4fae0cd
--- /dev/null
+++ b/skills/codex-orchestration/SKILL.md
@@ -0,0 +1,48 @@
+---
+name: codex-orchestration
+description: "Route bounded Codex subagent work from live role availability, use the V2 spawn contract, and reconcile independent deliveries."
+license: Apache-2.0
+---
+
+# Codex Orchestration
+
+Use this procedure when a task is independently useful enough to delegate. The parent owns task selection, integration, validation, and the final outcome. A child never spawns another child, even if a child interface is visible to it.
+
+## Classify before dispatch
+
+Identify the requested artifact, whether it needs reading, implementation, testing, review, research, diagnosis, or integration, and the consequence of a wrong result. Do not delegate a one-file search or a simple edit when direct work is cheaper than rebuilding context in a child.
+
+Before dispatch, inspect only the relevant live role descriptions and exposed spawn schema. Use only role identifiers the current runtime exposes, and check the selected role's current resolved model and reasoning effort. Live descriptions are the authority; `list_agents` reports the running agent tree, not a role catalog.
+
+Match the task type to a currently available role: use a read-only specialist for discovery, primary-source research, decisions, or independent review; an implementing role for a bounded known artifact; a test specialist for a coverage or named-suite need; a debugger for an unknown cause; a stronger specialist for coupled invariants; and an integration reviewer to synthesize separate deliveries against one contract. These are routing examples, not a static role catalog.
+
+Select the least resource-intensive available role that can safely deliver the artifact. Do not assume a universal cost or capability order from role names or model labels. Use a light worker only when behavior, files, validation, and ownership are already clear. If demonstrated coupling or risk exceeds an available role, return the choice to the parent for a stronger available role or a decision. A read-only role assigned a write task must report the mismatch and stop.
+
+## Spawn contract
+
+Use the runtime's native subagent interface and its current schema. Set the selected identifier explicitly in `agent_type` and always pass `fork_turns: "none"`. Do not provide model or reasoning-effort overrides on the spawn call: the selected role card owns them. Put the relevant context in the child brief rather than passing a long inherited conversation.
+
+Every brief must include:
+
+1. Only relevant context, accepted decisions, and any relevant plan; do not attach full history or create a plan just to dispatch.
+2. Objective and testable acceptance criterion.
+3. In-scope and out-of-scope work, ownership, known existing work, and possible overlap.
+4. Interfaces and access constraints.
+5. Expected artifact and checks to run.
+6. Stop condition, escalation path, and next consumer.
+
+Use an action verb that matches the needed result: inspect, implement, test, review, or research. Ask for a diff when a diff is wanted; ask for a report when the child must remain read-only.
+
+## Child lifecycle and capacity
+
+`send_message` queues a message for an existing child but does not start or resume its turn. Use `followup_task` to give a completed child a new turn while preserving its history.
+
+Respect the chosen arrangement's allocation, per-role limits, and configured cap, then confirm the current runtime's resolved limits. A refused spawn is not a reason to idle: continue independent local work and wait only when nothing remains to advance.
+
+## Coordinate and accept
+
+Give writing children non-overlapping file or component ownership. Serialize work that shares a file, mutable state, or an interacting contract. Stop or redirect a child that lacks evidence, exceeds its brief, repeats failure, or conflicts with owned work. Only the parent integrates deliveries. If two independent deliveries must combine, use an available integration reviewer before the parent accepts the combined result. High-risk work still needs the independent critical review appropriate to its risk.
+
+An implementing child should complete the requested artifact and affected checks before handoff, rather than return a first draft. Safe local work and disposable-fixture checks may continue within the brief; production side effects remain outside child scope. Repeat a check only after a relevant change or new evidence.
+
+The parent must read the actual diff, verify reported commands and results, and validate the affected behavior at the responsible layer. A skipped, unavailable, empty, or mocked-away required check is a blocker, not a pass. Correct in-scope defects and rerun the affected checks before completion.
diff --git a/skills/pragmatic-programmer/LICENSE b/skills/pragmatic-programmer/LICENSE
new file mode 100644
index 0000000..b09cd78
--- /dev/null
+++ b/skills/pragmatic-programmer/LICENSE
@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/skills/pragmatic-programmer/NOTICE b/skills/pragmatic-programmer/NOTICE
new file mode 100644
index 0000000..b6d6c26
--- /dev/null
+++ b/skills/pragmatic-programmer/NOTICE
@@ -0,0 +1,11 @@
+Pragmatic Programmer
+Copyright 2026 Rafael Bittencourt
+
+This public skill is a concise adaptation of an Apache-2.0 pragmatic-programming
+workflow maintained in Rafael Bittencourt's engineering practice. It includes
+paraphrased ideas inspired by The Pragmatic Programmer: Your Journey to Mastery,
+20th Anniversary Edition, by David Thomas and Andrew Hunt:
+https://pragprog.com/titles/tpp20/the-pragmatic-programmer-20th-anniversary-edition/
+
+No book text, book assets, internal configuration, or operational policy is
+included.
diff --git a/skills/pragmatic-programmer/SKILL.md b/skills/pragmatic-programmer/SKILL.md
new file mode 100644
index 0000000..d95aa75
--- /dev/null
+++ b/skills/pragmatic-programmer/SKILL.md
@@ -0,0 +1,43 @@
+---
+name: pragmatic-programmer
+description: "Use for a targeted engineering decision: an unexplained green result, duplicate knowledge, a boundary contract, a reversible next step, a spike versus real path, or shared state and finite resources. Skip routine edits with no such decision."
+license: Apache-2.0
+---
+
+# Pragmatic Programmer
+
+Use this as an optional decision aid at a named engineering uncertainty, not as a mandatory checklist for every edit. It does not grant authority or replace a repository's safety, testing, or permission rules.
+
+Conceptual reference: [*The Pragmatic Programmer: Your Journey to Mastery*, 20th Anniversary Edition](https://pragprog.com/titles/tpp20/the-pragmatic-programmer-20th-anniversary-edition/) by David Thomas and Andrew Hunt. The guidance below is paraphrased.
+
+## Why is this green?
+
+When a fix or test passes but the mechanism is unclear, state three things: what failed before, what the change altered, and what input, ordering, or environment could make it fail again. If any answer is missing, treat the result as evidence of behavior, not proof of cause. Investigate the smallest relevant path until the next decision is supported. Do not turn this into a mandatory postmortem for an already-explained change.
+
+## DRY is about knowledge
+
+Before adding or merging similar code, ask whether the same real-world fact would need to change in both places for the same reason. If yes, establish one authority and derive or reuse the other representation. If no, similar syntax may be coincidental; avoid coupling two concerns that will diverge. Search the relevant scope before creating a second definition.
+
+## Contracts and real input validation
+
+For a new or changed boundary, state the preconditions, promised result, and invariants that must survive the operation. Keep assumptions inside the boundary explicit. Validate untrusted or external input at the real boundary and provide normal error handling there; an assertion or an internal precondition is not input validation.
+
+## Reversible small steps
+
+Choose the smallest change that reaches a useful feedback point. Prefer a change with an easy undo path when the decision is uncertain. For a hard-to-reverse decision, identify the affected consumer or data, recovery path, and the missing evidence before proceeding. Do not require formal alternatives for an ordinary reversible edit.
+
+## Spike or real path?
+
+Use a spike to answer one named uncertainty with a stop condition. Keep it isolated and discard it or deliberately rebuild it before it becomes production behavior. Use a thin real path when the question is whether the actual layers connect end to end; that path must meet the normal quality bar and remains part of the product.
+
+## Shared state and finite resources
+
+If another actor can change a value between a read, decision, and write, design the check-and-update as one owned operation or use an appropriate synchronization boundary. For a finite resource such as a lock, connection, process, port, or temporary artifact, name its owner, release point, and recovery if setup fails. Keep acquisition and release balanced, and check for leftovers at the relevant close point.
+
+## Impossible versus operational errors
+
+Use an assertion only for a state made unreachable by an enforced internal invariant, and keep assertion conditions free of side effects. Invalid input, unavailable services, exhausted capacity, and missing resources are operational failures: handle or report them explicitly. Never use an assertion instead of boundary validation or error handling.
+
+## Finish the scoped work
+
+When safe local work and disposable fixtures are available, carry the requested artifact through the checks affected by the change before handing it back. Repeat a check only when a change or new evidence makes another run informative. Production side effects remain outside this skill's authority.
diff --git a/tests/test_catalog.py b/tests/test_catalog.py
new file mode 100644
index 0000000..3267c01
--- /dev/null
+++ b/tests/test_catalog.py
@@ -0,0 +1,548 @@
+from __future__ import annotations
+
+import contextlib
+import io
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+
+REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPOSITORY_ROOT / "scripts"))
+
+import validate_catalog
+
+
+def build_catalog(root: Path, *, include_optional: bool = True) -> Path:
+    arrangement = root / "arrangements" / "demo"
+    agents = arrangement / "agents"
+    agents.mkdir(parents=True)
+
+    optional_fields = ""
+    if include_optional:
+        optional_fields = """\
+instructions_with_skill = "AGENTS.with-skill.snippet.md"
+optional_skills = ["../../skills/codex-orchestration"]
+optional_hook = "../../hooks/spawn-contract"
+"""
+
+    (arrangement / "arrangement.toml").write_text(
+        f"""\
+schema_version = 1
+id = "demo"
+version = "1.0.0"
+author = "Example Author"
+description = "A public arrangement."
+license = "MIT"
+codex_version = ">=0.1"
+config = "config.toml"
+agents = "agents"
+instructions = "AGENTS.snippet.md"
+{optional_fields}""",
+        encoding="utf-8",
+    )
+    (arrangement / "config.toml").write_text(
+        """\
+model = "example-model"
+model_reasoning_effort = "medium"
+
+[features]
+multi_agent = true
+
+[features.multi_agent_v2]
+enabled = true
+tool_namespace = "agents"
+max_concurrent_threads_per_session = 4
+
+[agents]
+default_subagent_model = "example-model"
+default_subagent_reasoning_effort = "medium"
+""",
+        encoding="utf-8",
+    )
+    (arrangement / "AGENTS.snippet.md").write_text(
+        "Use the arrangement as documented.\n",
+        encoding="utf-8",
+    )
+    (agents / "worker.toml").write_text(
+        """\
+name = "worker"
+description = "Runs bounded work."
+model = "example-model"
+model_reasoning_effort = "medium"
+developer_instructions = "Stay within the assigned boundary."
+""",
+        encoding="utf-8",
+    )
+
+    if include_optional:
+        (arrangement / "AGENTS.with-skill.snippet.md").write_text(
+            "Use the optional extension when it is installed.\n",
+            encoding="utf-8",
+        )
+        skill = root / "skills" / "codex-orchestration"
+        skill.mkdir(parents=True)
+        (skill / "SKILL.md").write_text(
+            "# Optional extension\n",
+            encoding="utf-8",
+        )
+        hook = root / "hooks" / "spawn-contract"
+        hook.mkdir(parents=True)
+        (hook / "README.md").write_text(
+            "Install the hook and run its entrypoint in the supported runtime.\n",
+            encoding="utf-8",
+        )
+        (hook / "hook.js").write_text("export {};\n", encoding="utf-8")
+
+    return arrangement
+
+
+class CatalogValidatorTests(unittest.TestCase):
+    def validate(self, root: Path) -> validate_catalog.ValidationResult:
+        return validate_catalog.validate_catalog(root)
+
+    def test_accepts_complete_catalog_and_reports_counts(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            build_catalog(root)
+
+            result = self.validate(root)
+
+            self.assertEqual([], result.errors)
+            self.assertEqual(1, result.arrangements)
+            self.assertEqual(1, result.roles)
+
+            stdout = io.StringIO()
+            stderr = io.StringIO()
+            with contextlib.redirect_stdout(stdout), contextlib.redirect_stderr(stderr):
+                exit_code = validate_catalog.main(["--root", str(root)])
+            self.assertEqual(0, exit_code)
+            self.assertIn("1 arrangements, 1 roles", stdout.getvalue())
+            self.assertEqual("", stderr.getvalue())
+
+    def test_rejects_empty_catalog_with_nonzero_cli_status(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            (root / "arrangements").mkdir()
+
+            stdout = io.StringIO()
+            stderr = io.StringIO()
+            with contextlib.redirect_stdout(stdout), contextlib.redirect_stderr(stderr):
+                exit_code = validate_catalog.main(["--root", str(root)])
+
+            self.assertEqual(1, exit_code)
+            self.assertIn("0 arrangements, 0 roles", stdout.getvalue())
+            self.assertIn("no readable arrangements", stderr.getvalue())
+
+    def test_reports_missing_manifest_reference(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            (arrangement / "AGENTS.snippet.md").unlink()
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("'instructions' reference: does not exist", errors)
+
+    def test_accepts_contained_community_component_references(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            manifest = arrangement / "arrangement.toml"
+            manifest.write_text(
+                manifest.read_text(encoding="utf-8").replace(
+                    'config = "config.toml"',
+                    'config = "community-config.toml"',
+                ).replace(
+                    'agents = "agents"',
+                    'agents = "community-agents"',
+                ).replace(
+                    'instructions = "AGENTS.snippet.md"',
+                    'instructions = "community.md"',
+                ).replace(
+                    'instructions_with_skill = "AGENTS.with-skill.snippet.md"',
+                    'instructions_with_skill = "community.with-skill.md"',
+                ).replace(
+                    'optional_skills = ["../../skills/codex-orchestration"]',
+                    'optional_skills = ["../../components/community-skill"]',
+                ).replace(
+                    'optional_hook = "../../hooks/spawn-contract"',
+                    'optional_hook = "../../components/community-hook"',
+                ),
+                encoding="utf-8",
+            )
+            (arrangement / "community-config.toml").write_text(
+                (arrangement / "config.toml").read_text(encoding="utf-8"),
+                encoding="utf-8",
+            )
+            community_agents = arrangement / "community-agents"
+            community_agents.mkdir()
+            (community_agents / "worker.toml").write_text(
+                (arrangement / "agents" / "worker.toml").read_text(encoding="utf-8"),
+                encoding="utf-8",
+            )
+            (arrangement / "community.md").write_text("Community instructions.\n", encoding="utf-8")
+            (arrangement / "community.with-skill.md").write_text(
+                "Community extension instructions.\n",
+                encoding="utf-8",
+            )
+            skill = root / "components" / "community-skill"
+            skill.mkdir(parents=True)
+            (skill / "SKILL.md").write_text("# Community extension\n", encoding="utf-8")
+            hook = root / "components" / "community-hook"
+            hook.mkdir(parents=True)
+            (hook / "README.md").write_text(
+                "Install the hook and invoke entrypoint.sh with its shell runtime.\n",
+                encoding="utf-8",
+            )
+            (hook / "entrypoint.sh").write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_accepts_multiple_optional_skills(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            manifest = arrangement / "arrangement.toml"
+            manifest.write_text(
+                manifest.read_text(encoding="utf-8").replace(
+                    'optional_skills = ["../../skills/codex-orchestration"]',
+                    'optional_skills = ['
+                    '"../../skills/codex-orchestration", '
+                    '"../../components/second-skill"]',
+                ),
+                encoding="utf-8",
+            )
+            second_skill = root / "components" / "second-skill"
+            second_skill.mkdir(parents=True)
+            (second_skill / "SKILL.md").write_text("# Second skill\n", encoding="utf-8")
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_rejects_invalid_optional_skills_and_legacy_alias(self) -> None:
+        cases = (
+            (
+                'optional_skills = "../../skills/codex-orchestration"',
+                "'optional_skills' must be a nonempty list of relative paths",
+            ),
+            (
+                "optional_skills = []",
+                "'optional_skills' must be a nonempty list of relative paths",
+            ),
+            (
+                "optional_skills = [42]",
+                "'optional_skills[0]' must be a nonempty relative path",
+            ),
+            (
+                'optional_skill = "../../skills/codex-orchestration"',
+                "'optional_skill' is unsupported; use 'optional_skills'",
+            ),
+        )
+        source = 'optional_skills = ["../../skills/codex-orchestration"]'
+        for replacement, expected_error in cases:
+            with self.subTest(replacement=replacement), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary)
+                arrangement = build_catalog(root)
+                manifest = arrangement / "arrangement.toml"
+                manifest.write_text(
+                    manifest.read_text(encoding="utf-8").replace(source, replacement),
+                    encoding="utf-8",
+                )
+
+                self.assertIn(expected_error, "\n".join(self.validate(root).errors))
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            manifest = arrangement / "arrangement.toml"
+            manifest.write_text(
+                manifest.read_text(encoding="utf-8").replace(
+                    'optional_skills = ["../../skills/codex-orchestration"]\n',
+                    "",
+                ),
+                encoding="utf-8",
+            )
+
+            self.assertIn(
+                "'instructions_with_skill' requires a nonempty 'optional_skills' list",
+                "\n".join(self.validate(root).errors),
+            )
+
+    def test_reports_invalid_toml(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            (arrangement / "agents" / "worker.toml").write_text(
+                "name = [\n",
+                encoding="utf-8",
+            )
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("invalid TOML", errors)
+
+    def test_rejects_reference_that_escapes_catalog_root(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            manifest = arrangement / "arrangement.toml"
+            manifest.write_text(
+                manifest.read_text(encoding="utf-8").replace(
+                    'optional_skills = ["../../skills/codex-orchestration"]',
+                    'optional_skills = ["../../../outside-skill"]',
+                ).replace(
+                    'optional_hook = "../../hooks/spawn-contract"',
+                    'optional_hook = "../../../outside-hook"',
+                ),
+                encoding="utf-8",
+            )
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("'optional_skills[0]' reference: resolves outside catalog root", errors)
+            self.assertIn("'optional_hook' reference: resolves outside catalog root", errors)
+
+    def test_rejects_bad_config_types_and_disabled_v2(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            config = arrangement / "config.toml"
+            config.write_text(
+                config.read_text(encoding="utf-8")
+                .replace("enabled = true", "enabled = false")
+                .replace(
+                    "max_concurrent_threads_per_session = 4",
+                    "max_concurrent_threads_per_session = true",
+                )
+                .replace(
+                    "[agents]\n",
+                    "[agents]\nmax_concurrent_threads_per_session = 4\n",
+                ),
+                encoding="utf-8",
+            )
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("features.multi_agent_v2 'enabled' must be true", errors)
+            self.assertIn(
+                "features.multi_agent_v2 'max_concurrent_threads_per_session' "
+                "must be a positive integer",
+                errors,
+            )
+
+            config.write_text(
+                config.read_text(encoding="utf-8") + '\nunsupported = "value"\n',
+                encoding="utf-8",
+            )
+            self.assertIn(
+                "agents has unsupported key 'unsupported'",
+                "\n".join(self.validate(root).errors),
+            )
+            self.assertIn(
+                "agents has unsupported key 'max_concurrent_threads_per_session'",
+                "\n".join(self.validate(root).errors),
+            )
+
+    def test_rejects_missing_v2_thread_cap_and_allows_no_agents_table(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            config = arrangement / "config.toml"
+            config.write_text(
+                config.read_text(encoding="utf-8").replace(
+                    "max_concurrent_threads_per_session = 4\n",
+                    "",
+                ),
+                encoding="utf-8",
+            )
+
+            self.assertIn(
+                "features.multi_agent_v2 is missing required key "
+                "'max_concurrent_threads_per_session'",
+                "\n".join(self.validate(root).errors),
+            )
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            config = arrangement / "config.toml"
+            config.write_text(
+                config.read_text(encoding="utf-8").replace(
+                    "\n[agents]\ndefault_subagent_model = \"example-model\"\n"
+                    "default_subagent_reasoning_effort = \"medium\"\n",
+                    "\n",
+                ),
+                encoding="utf-8",
+            )
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_rejects_duplicate_and_mismatched_role_names(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            source = arrangement / "agents" / "worker.toml"
+            (arrangement / "agents" / "other.toml").write_text(
+                source.read_text(encoding="utf-8"),
+                encoding="utf-8",
+            )
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("role filename must match name 'worker'", errors)
+            self.assertIn("duplicate role name 'worker'", errors)
+
+    def test_accepts_valid_english_nickname_candidates(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            role = arrangement / "agents" / "worker.toml"
+            role.write_text(
+                role.read_text(encoding="utf-8")
+                + '\nnickname_candidates = ["Sunny Scout", "Bolt-Runner", "Atlas_2"]\n',
+                encoding="utf-8",
+            )
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_rejects_invalid_nickname_candidates(self) -> None:
+        cases = (
+            (
+                "nickname_candidates = []",
+                "role 'nickname_candidates' must be a nonempty list of strings",
+            ),
+            (
+                'nickname_candidates = "Sunny"',
+                "role 'nickname_candidates' must be a nonempty list of strings",
+            ),
+            (
+                "nickname_candidates = [42]",
+                "nickname_candidates[0] must be a string",
+            ),
+            (
+                'nickname_candidates = ["  "]',
+                "nickname_candidates[0] must not be blank after trimming",
+            ),
+            (
+                'nickname_candidates = ["Sunny", " Sunny "]',
+                "nickname_candidates[1] duplicates 'Sunny' after trimming",
+            ),
+            (
+                'nickname_candidates = ["Rafç"]',
+                "nickname_candidates[0] contains unsupported characters",
+            ),
+            (
+                'nickname_candidates = ["Lunã"]',
+                "nickname_candidates[0] contains unsupported characters",
+            ),
+        )
+        for nickname_toml, expected_error in cases:
+            with self.subTest(nickname_toml=nickname_toml), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary)
+                arrangement = build_catalog(root)
+                role = arrangement / "agents" / "worker.toml"
+                role.write_text(
+                    role.read_text(encoding="utf-8") + f"\n{nickname_toml}\n",
+                    encoding="utf-8",
+                )
+
+                self.assertIn(expected_error, "\n".join(self.validate(root).errors))
+
+    def test_optional_assets_are_optional_but_checked_when_declared(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            build_catalog(root, include_optional=False)
+            self.assertEqual([], self.validate(root).errors)
+
+            arrangement = build_catalog(root / "second")
+            (arrangement.parent.parent / "skills" / "codex-orchestration" / "SKILL.md").unlink()
+            (arrangement.parent.parent / "hooks" / "spawn-contract" / "README.md").unlink()
+
+            errors = "\n".join(self.validate(arrangement.parent.parent).errors)
+
+            self.assertIn("optional_skills[0] SKILL.md: does not exist", errors)
+            self.assertIn("optional_hook README.md: does not exist", errors)
+
+    def test_rejects_nonpublic_payload_contamination(self) -> None:
+        cases = (
+            ("~/.private-tool/state", "nonpublic hidden-home directory"),
+            ("C:/Users/example/private", "personal user path"),
+            ("/Users/example/private", "personal user path"),
+            ("credentials.json", "credential filename"),
+        )
+        for payload, expected_error in cases:
+            with self.subTest(payload=payload), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary)
+                arrangement = build_catalog(root)
+                instructions = arrangement / "AGENTS.snippet.md"
+                instructions.write_text(payload, encoding="utf-8")
+
+                errors = "\n".join(self.validate(root).errors)
+
+                self.assertIn(expected_error, errors)
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            (arrangement / "AGENTS.snippet.md").write_text(
+                "A public catalog name can contain ordinary words.\n",
+                encoding="utf-8",
+            )
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_rejects_role_dependency_constructs_but_not_generic_prose(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            role = arrangement / "agents" / "worker.toml"
+            role.write_text(
+                role.read_text(encoding="utf-8").replace(
+                    "Stay within the assigned boundary.",
+                    "Inspect provider APIs and configuration before changing code.",
+                ),
+                encoding="utf-8",
+            )
+
+            self.assertEqual([], self.validate(root).errors)
+
+            role.write_text(
+                role.read_text(encoding="utf-8").replace(
+                    "Inspect provider APIs and configuration before changing code.",
+                    "Read ~/.codex/skills/codex-orchestration/SKILL.md.",
+                ),
+                encoding="utf-8",
+            )
+            self.assertIn(
+                "dependency/config reference '.codex/skills/'",
+                "\n".join(self.validate(root).errors),
+            )
+
+            role.write_text(
+                role.read_text(encoding="utf-8") + '\n[mcp]\nserver = "local"\n',
+                encoding="utf-8",
+            )
+            self.assertIn(
+                "role has unsupported key 'mcp'",
+                "\n".join(self.validate(root).errors),
+            )
+
+    def test_invalid_utf8_toml_returns_nonzero_without_traceback(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            arrangement = build_catalog(root)
+            (arrangement / "config.toml").write_bytes(b"\xff")
+
+            stdout = io.StringIO()
+            stderr = io.StringIO()
+            with contextlib.redirect_stdout(stdout), contextlib.redirect_stderr(stderr):
+                exit_code = validate_catalog.main(["--root", str(root)])
+
+            self.assertEqual(1, exit_code)
+            self.assertIn("invalid TOML", stderr.getvalue())
+            self.assertNotIn("Traceback", stderr.getvalue())
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_components.py b/tests/test_components.py
new file mode 100644
index 0000000..51a0e59
--- /dev/null
+++ b/tests/test_components.py
@@ -0,0 +1,348 @@
+from __future__ import annotations
+
+import contextlib
+import io
+import json
+import os
+import subprocess
+import sys
+import tempfile
+import unittest
+from unittest import mock
+from pathlib import Path
+
+
+REPOSITORY_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPOSITORY_ROOT / "scripts"))
+
+import validate_components
+
+
+PORTABLE_SCHEMA = "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json"
+
+
+def write_json(path: Path, value: object) -> None:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(json.dumps(value), encoding="utf-8")
+
+
+def write_skill(directory: Path, name: str = "helper") -> None:
+    directory.mkdir(parents=True, exist_ok=True)
+    (directory / "SKILL.md").write_text(
+        f"---\nname: {name}\ndescription: A reusable helper.\n---\n\n# Helper\n",
+        encoding="utf-8",
+    )
+
+
+def portable_manifest(name: str) -> dict[str, object]:
+    return {
+        "$schema": PORTABLE_SCHEMA,
+        "name": name,
+        "version": "1.0.0",
+        "description": "A portable test plugin.",
+    }
+
+
+def compatibility_manifest(name: str) -> dict[str, object]:
+    return {
+        "name": name,
+        "version": "1.0.0",
+        "description": "A compatibility test plugin.",
+    }
+
+
+def create_plugin(root: Path, name: str, *, portable: bool) -> Path:
+    plugin = root / "plugins" / name
+    plugin.mkdir(parents=True)
+    (plugin / "README.md").write_text("# Plugin\n", encoding="utf-8")
+    (plugin / "LICENSE").write_text("MIT\n", encoding="utf-8")
+    manifest = portable_manifest(name) if portable else compatibility_manifest(name)
+    manifest_path = plugin / "plugin.json"
+    if not portable:
+        manifest_path = plugin / ".codex-plugin" / "plugin.json"
+    write_json(manifest_path, manifest)
+    return plugin
+
+
+def link_directory(link: Path, target: Path) -> None:
+    try:
+        link.symlink_to(target, target_is_directory=True)
+    except OSError as exc:
+        if os.name != "nt":
+            raise
+        environment = os.environ.copy()
+        environment.update(CATALOG_TEST_LINK=str(link), CATALOG_TEST_TARGET=str(target))
+        subprocess.run(
+            ["pwsh", "-NoLogo", "-NoProfile", "-NonInteractive", "-Command",
+             "New-Item -ItemType Junction -Path $env:CATALOG_TEST_LINK "
+             "-Target $env:CATALOG_TEST_TARGET -ErrorAction Stop | Out-Null"],
+            env=environment, check=True, capture_output=True, timeout=15,
+            creationflags=getattr(subprocess, "CREATE_NO_WINDOW", 0),
+        )
+        if link.resolve() != target.resolve():
+            raise RuntimeError("Directory-link fixture did not resolve to its target") from exc
+
+
+class ComponentValidatorTests(unittest.TestCase):
+    def validate(self, root: Path) -> validate_components.ComponentValidationResult:
+        return validate_components.validate_components(root)
+
+    def test_unreadable_component_collection_is_reported_as_error(self) -> None:
+        original_lstat = Path.lstat
+        for component in ("skills", "plugins"):
+            with self.subTest(component=component), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary).resolve()
+                inaccessible = root / component
+                inaccessible.mkdir()
+
+                def deny(path: Path):
+                    if path == inaccessible:
+                        raise PermissionError("permission denied")
+                    return original_lstat(path)
+
+                stdout = io.StringIO()
+                stderr = io.StringIO()
+                with mock.patch.object(Path, "lstat", autospec=True, side_effect=deny):
+                    with contextlib.redirect_stdout(stdout), contextlib.redirect_stderr(stderr):
+                        exit_code = validate_components.main(["--root", str(root)])
+
+                self.assertEqual(1, exit_code)
+                self.assertIn(f"{component}: cannot inspect", stderr.getvalue())
+                self.assertNotIn("NOT APPLICABLE", stdout.getvalue())
+
+    def test_readme_only_reports_zero_plugins(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            (root / "README.md").write_text("# Catalog\n", encoding="utf-8")
+            (root / "plugins").mkdir()
+            (root / "plugins" / "README.md").write_text("# Plugins\n", encoding="utf-8")
+
+            result = self.validate(root)
+
+            self.assertEqual([], result.errors)
+            self.assertEqual(0, result.skills)
+            self.assertEqual(0, result.plugins)
+            stdout = io.StringIO()
+            stderr = io.StringIO()
+            with contextlib.redirect_stdout(stdout), contextlib.redirect_stderr(stderr):
+                exit_code = validate_components.main(["--root", str(root)])
+            self.assertEqual(0, exit_code)
+            self.assertIn("plugins=0", stdout.getvalue())
+            self.assertNotIn("preflight passed", stdout.getvalue())
+            self.assertEqual("", stderr.getvalue())
+
+    def test_accepts_portable_plugin_with_optional_components(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "portable", portable=True)
+            manifest = portable_manifest("portable")
+            manifest["extensions"] = {
+                "com.openai": {
+                    "apps": "./.app.json",
+                    "hooks": "./hooks/custom.json",
+                    "interface": {
+                        "logo": "./assets/logo.svg",
+                        "logoDark": "./assets/logo-dark.svg",
+                        "screenshots": ["./assets/example.png"],
+                    },
+                }
+            }
+            write_json(plugin / "plugin.json", manifest)
+            write_json(plugin / ".app.json", {"apps": {}})
+            write_json(
+                plugin / "mcp.json",
+                {"mcpServers": {"demo": {"type": "streamable-http"}}},
+            )
+            write_json(plugin / "hooks" / "custom.json", {"hooks": {}})
+            write_skill(plugin / "skills" / "helper")
+            (plugin / "assets").mkdir()
+            (plugin / "assets" / "logo.svg").write_text("<svg />", encoding="utf-8")
+            (plugin / "assets" / "logo-dark.svg").write_text("<svg />", encoding="utf-8")
+            (plugin / "assets" / "example.png").write_bytes(b"PNG")
+
+            result = self.validate(root)
+
+            self.assertEqual([], result.errors)
+            self.assertEqual(0, result.skills)
+            self.assertEqual(1, result.plugins)
+
+    def test_accepts_compatibility_plugin_with_optional_components(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "compat", portable=False)
+            manifest = compatibility_manifest("compat")
+            manifest.update(
+                {
+                    "skills": "./skills",
+                    "mcpServers": "./.mcp.json",
+                    "apps": "./.app.json",
+                    "hooks": "./hooks/hooks.json",
+                    "interface": {"logo": "./assets/logo.svg"},
+                }
+            )
+            write_json(plugin / ".codex-plugin" / "plugin.json", manifest)
+            write_skill(plugin / "skills" / "helper")
+            write_json(plugin / ".mcp.json", {"mcpServers": {}})
+            write_json(plugin / ".app.json", {"apps": {}})
+            write_json(plugin / "hooks" / "hooks.json", {"hooks": {}})
+            (plugin / "assets").mkdir()
+            (plugin / "assets" / "logo.svg").write_text("<svg />", encoding="utf-8")
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_portable_manifest_wins_over_compatibility_overlay(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "portable", portable=True)
+            manifest = portable_manifest("portable")
+            manifest["extensions"] = {"com.openai": {}}
+            write_json(plugin / "plugin.json", manifest)
+            compatibility = plugin / ".codex-plugin" / "plugin.json"
+            compatibility.parent.mkdir()
+            compatibility.write_text("not JSON", encoding="utf-8")
+
+            self.assertEqual([], self.validate(root).errors)
+
+    def test_portable_root_uses_compatibility_overlay_without_inline_settings(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "portable", portable=True)
+            write_json(
+                plugin / ".codex-plugin" / "plugin.json",
+                {"hooks": "./hooks/missing.json"},
+            )
+
+            self.assertIn("does not exist", "\n".join(self.validate(root).errors))
+
+    def test_rejects_missing_manifest_and_required_plugin_files(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = root / "plugins" / "missing"
+            plugin.mkdir(parents=True)
+            (plugin / "README.md").write_text("# Plugin\n", encoding="utf-8")
+            (plugin / "LICENSE").write_text("MIT\n", encoding="utf-8")
+
+            self.assertIn(
+                "has no plugin.json or .codex-plugin/plugin.json manifest",
+                "\n".join(self.validate(root).errors),
+            )
+
+        for missing_name, expected_error in (
+            ("README.md", "requires README.md"),
+            ("LICENSE", "requires a license or provenance file"),
+        ):
+            with self.subTest(missing_name=missing_name), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary)
+                plugin = create_plugin(root, "required", portable=True)
+                (plugin / missing_name).unlink()
+
+                self.assertIn(expected_error, "\n".join(self.validate(root).errors))
+
+    def test_rejects_invalid_manifest_identity_and_json_companions(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "identity", portable=True)
+            manifest = portable_manifest("other")
+            manifest["version"] = " "
+            manifest["$schema"] = "https://agent-plugins.org/schemas/not-supported.json"
+            write_json(plugin / "plugin.json", manifest)
+            (plugin / "mcp.json").write_text("[]", encoding="utf-8")
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("manifest name must match plugin directory 'identity'", errors)
+            self.assertIn("manifest 'version' must be a nonempty string", errors)
+            self.assertIn("'$schema' must equal", errors)
+            self.assertIn("mcp.json: JSON value must be an object", errors)
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "malformed", portable=True)
+            (plugin / "plugin.json").write_text("{", encoding="utf-8")
+
+            self.assertIn("plugin.json: invalid JSON", "\n".join(self.validate(root).errors))
+
+    def test_rejects_unsafe_or_missing_companion_references(self) -> None:
+        cases = (
+            ("hooks", "../outside.json", "must not contain '..'"),
+            ("apps", "C:/outside.json", "must not be an absolute path"),
+            ("hooks", "./hooks/missing.json", "does not exist"),
+        )
+        for field, value, expected_error in cases:
+            with self.subTest(field=field, value=value), tempfile.TemporaryDirectory() as temporary:
+                root = Path(temporary)
+                plugin = create_plugin(root, "unsafe", portable=True)
+                manifest = portable_manifest("unsafe")
+                manifest["extensions"] = {"com.openai": {field: value}}
+                write_json(plugin / "plugin.json", manifest)
+
+                self.assertIn(expected_error, "\n".join(self.validate(root).errors))
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "symlink", portable=True)
+            outside = root / "outside"
+            outside.mkdir()
+            (outside / "escape.json").write_text("{}", encoding="utf-8")
+            link = plugin / "hooks" / "escape"
+            link.parent.mkdir()
+            link_directory(link, outside)
+            manifest = portable_manifest("symlink")
+            manifest["extensions"] = {"com.openai": {"hooks": "./hooks/escape/escape.json"}}
+            write_json(plugin / "plugin.json", manifest)
+
+            self.assertIn(
+                "resolves outside plugin directory",
+                "\n".join(self.validate(root).errors),
+            )
+
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "asset", portable=True)
+            manifest = portable_manifest("asset")
+            manifest["extensions"] = {
+                "com.openai": {"interface": {"logoDark": "./assets/missing.svg"}}
+            }
+            write_json(plugin / "plugin.json", manifest)
+
+            self.assertIn("does not exist", "\n".join(self.validate(root).errors))
+
+    def test_compatibility_defaults_and_inline_mcp_are_structurally_checked(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            plugin = create_plugin(root, "compat", portable=False)
+            write_json(
+                plugin / ".codex-plugin" / "plugin.json",
+                {"name": "compat", "version": "1.0.0", "description": "Compatibility.",
+                 "mcpServers": {"local": {"command": "never-executed"}}},
+            )
+            skill = plugin / "skills" / "empty"
+            skill.mkdir(parents=True)
+            (skill / "SKILL.md").write_text("", encoding="utf-8")
+            write_json(plugin / "hooks" / "hooks.json", [])
+
+            errors = "\n".join(self.validate(root).errors)
+
+            self.assertIn("SKILL.md: must be nonempty", errors)
+            self.assertIn("hooks.json: JSON value must be an object", errors)
+            self.assertNotIn("mcpServers': must be a relative path", errors)
+
+    def test_validates_nonempty_standalone_skill_files(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary:
+            root = Path(temporary)
+            write_skill(root / "skills" / "valid", "valid")
+            broken = root / "skills" / "broken"
+            broken.mkdir()
+            (broken / "SKILL.md").write_text("", encoding="utf-8")
+
+            result = self.validate(root)
+
+            self.assertEqual(2, result.skills)
+            self.assertIn(
+                "SKILL.md: must be nonempty",
+                "\n".join(result.errors),
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_spawn_contract.py b/tests/test_spawn_contract.py
new file mode 100644
index 0000000..3331cde
--- /dev/null
+++ b/tests/test_spawn_contract.py
@@ -0,0 +1,88 @@
+import json
+from pathlib import Path
+import subprocess
+import sys
+import unittest
+
+
+SCRIPT = Path(__file__).resolve().parents[1] / "hooks/spawn-contract/guard.py"
+
+
+class SpawnContractTests(unittest.TestCase):
+    def invoke(self, payload):
+        return subprocess.run(
+            [sys.executable, "-X", "utf8", str(SCRIPT)],
+            input=payload if isinstance(payload, str) else json.dumps(payload),
+            text=True, capture_output=True, timeout=5,
+        )
+
+    def spawn(self, **overrides):
+        args = {"agent_type": "explorer", "fork_turns": "none",
+                "task_name": "map", "message": "Inspect the public interface."}
+        args.update(overrides)
+        return {"hook_event_name": "PreToolUse", "tool_name": "spawn_agent",
+                "tool_input": args}
+
+    def assert_denied(self, result):
+        self.assertEqual(result.returncode, 0, result.stderr)
+        decision = json.loads(result.stdout)["hookSpecificOutput"]
+        self.assertEqual(decision["permissionDecision"], "deny")
+        self.assertTrue(decision["permissionDecisionReason"])
+
+    def test_explicit_role_without_history_is_allowed_unchanged(self):
+        result = self.invoke(self.spawn())
+        self.assertEqual(result.returncode, 0, result.stderr)
+        self.assertEqual(result.stdout, "")
+
+    def test_history_forks_are_denied(self):
+        for value in (None, "all", "1", 1, "NONE", False):
+            with self.subTest(value=value):
+                self.assert_denied(self.invoke(self.spawn(fork_turns=value)))
+        payload = self.spawn()
+        del payload["tool_input"]["fork_turns"]
+        self.assert_denied(self.invoke(payload))
+
+    def test_missing_or_blank_role_is_denied(self):
+        for value in (None, "", "  ", 3):
+            self.assert_denied(self.invoke(self.spawn(agent_type=value)))
+        payload = self.spawn()
+        del payload["tool_input"]["agent_type"]
+        self.assert_denied(self.invoke(payload))
+
+    def test_call_level_model_and_effort_are_denied_even_when_null(self):
+        for key in ("model", "reasoning_effort", "model_reasoning_effort"):
+            self.assert_denied(self.invoke(self.spawn(**{key: None})))
+
+    def test_old_fork_argument_is_denied(self):
+        self.assert_denied(self.invoke(self.spawn(fork_context=True)))
+
+    def test_known_tool_aliases_are_checked(self):
+        for name in ("Agent", "agents.spawn_agent", "functions.spawn_agent", "agentsspawn_agent"):
+            payload = self.spawn(fork_turns="all")
+            payload["tool_name"] = name
+            self.assert_denied(self.invoke(payload))
+
+    def test_unrelated_tools_and_events_are_not_blocked(self):
+        for name in ("Bash", "mcp__other__spawn_agent", "followup_task"):
+            payload = self.spawn(fork_turns="all")
+            payload["tool_name"] = name
+            self.assertEqual(self.invoke(payload).stdout, "")
+        payload = self.spawn(fork_turns="all")
+        payload["hook_event_name"] = "PostToolUse"
+        self.assertEqual(self.invoke(payload).stdout, "")
+
+    def test_malformed_envelopes_are_denied_without_echoing_input(self):
+        for payload in ("", "{secret:DO_NOT_ECHO}", "[]", "null",
+                        {"hook_event_name": "PreToolUse"},
+                        {"hook_event_name": "PreToolUse", "tool_name": "spawn_agent",
+                         "tool_input": "DO_NOT_ECHO"}):
+            result = self.invoke(payload)
+            self.assert_denied(result)
+            self.assertNotIn("DO_NOT_ECHO", result.stdout + result.stderr)
+
+    def test_oversized_input_is_denied_without_processing(self):
+        self.assert_denied(self.invoke(" " * (1024 * 1024 + 1)))
+
+
+if __name__ == "__main__":
+    unittest.main()