Long-horizon agent skill for Claude Code, Cursor, Codex & Grok Build.
Stop agent drift with a durable ledger, a clean-context supervisor, and verified gates. Queue many long tasks in one loop — even unrelated ones — and keep going after a host switch by re-sending the same prompt against the files.
Design once → compile a durable loop-graph → verify all the way to done.
English · 简体中文
longgraph (longgraph-skill) is a curated agent skill and cross-host
prompt library for long-running / long-horizon agent work — multi-hour
coding, multi-milestone migrations, a queue of long tasks in one loop (they
need not be related), and anything that outlives one context window. It is
graph engineering for agents: specialized roles (executor · supervisor ·
scout) connected through durable, inspectable files — not another orchestration
runtime. Because the scoreboard lives on disk, you can change hosts mid-run:
open the same workspace, re-send the frozen node prompt, and continue.
One durable graph, portable across hosts. For a simple self-contained goal, use the host's normal task or goal directly; longgraph starts where durable graph structure adds value.
Renamed from octopus. Same library; primary brand is now longgraph /
longgraph-skill//longgraph/.longgraph/. Older posts that sayoctopus-skill,/octopus, or.octopus/still work via GitHub repo redirect, install legacy symlinks, and in-flight run-dir alias (see Install and Migration).
These are not one-shot demos. longgraph is a Markdown skill / prompt library (not an orchestration runtime). The table mixes checkable public Git, a function-only redacted multi-day pattern, and synthetic pedagogy.
| Case | What a reader can verify | Kind |
|---|---|---|
| Self-iteration of this skill | 87 public commits across ~14 calendar days (2026-07-19 → 2026-08-02), 74 files, method rules written back into the library (no wake edge, gate-wait backlog, blocked≠parked, bounded live edges, authoring≠runtime) | Public Git facts — fixed anchor 6efcb7f |
| Multi-day control-plane pattern | Multi-day wall-clock, tens of rounds, many directives: durable ledger, clean-context supervisor overturns self-reported evidence, non-skippable gates, blocked-work lane, owner A/B/C — functions only, no private payload | Redacted real-run pattern |
| migrate-blob-storage | Multi-milestone ledger: pilot → cohort, forced convergence, supervisor overturns self-reported evidence, non-skippable gate + blocked-work lane | Synthetic pedagogy (fictional app) |
| add-tests-to-cli | Smallest full run: three rounds, register-then-defer, clean-context supervisor intent | Synthetic pedagogy (fictional CLI) |
How to read the clock. The self-iteration window’s ~14 days / ~340 hours is project wall-clock (first public commit → frozen anchor), not continuous model execution and not a claim of unattended production autonomy. Re-check Git with the commands in the self-iteration case. The redacted multi-day card uses coarse buckets only and is not private-Git re-checkable — see its evidence boundary.
Publication rules for future cases: public / private boundary.
Reach for longgraph when you need any of:
- A long-horizon agent that keeps working after context compaction / session resets
- A durable task ledger (single scoreboard) instead of chat-memory progress
- Several long tasks in one loop — a continuous queue, even when items are unrelated
- Host-portable continuity — switch Claude Code ↔ Cursor ↔ Codex ↔ Grok Build mid-run by re-sending the prompt against the same files
- An independent clean-context supervisor — not the same agent grading itself
- Verified done: acceptance gates re-run against real output, not self-reported “done”
- Multi-milestone work with non-skippable gates and explicit owner red lines
- A Markdown skill / prompt library that works across Claude Code · Cursor · Codex · Grok Build
- One-shot edits, small PR-sized tasks, or anything that fits a single clean session
- You want a runtime framework (LangGraph, CrewAI, AutoGen, custom agent server)
- You only need a single short prompt with no ledger, gates, or independent review
| Approach | Runtime / server? | Independent verifier | Durable scoreboard | Multi-task queue + mid-run host switch |
|---|---|---|---|---|
| LangGraph / CrewAI / AutoGen | Yes | You build it | Usually yes | Framework-bound; often one deployment stack |
| One mega-prompt / single skill | No | No (self-check) | Weak (chat memory) | Weak — progress dies with the session |
| longgraph (this repo) | No — Markdown only | Yes (supervisor node) | Yes (ledger.md) |
Yes — files are the run; re-send the prompt |
Also called / related searches: longgraph skill, long-horizon agent skill, long-running agent skill, prevent agent drift, multi-task agent loop, switch AI coding host mid-task, Claude Code multi-agent supervisor, Grok Build agent loop, agent ledger, loop-graph, graph engineering for agents, clean-context review.
Long-running agents tend to drift in predictable ways: scope expands, “done” becomes self-reported, tests stop proving the real path, and early decisions disappear from context. longgraph moves the safeguards outside the model’s memory:
- Verified, not merely written — acceptance gates are rerun against real output.
- Durable state — the ledger survives context loss and remains the single scoreboard.
- Many long tasks, one loop — the ledger is a continuous queue; items can be independent (migrations, test debt, docs, gates) without forcing one mega-goal.
- Host-portable — progress is files under
.longgraph/<date-slug>/, not chat history. Point another host at the same workspace, re-send the compiled node prompt, and pick up the next open ledger item. - Clean-context review — an independent supervisor can catch drift the executor cannot see.
- Forced convergence — growth is periodically stopped, measured, and simplified.
- Low-friction owner decisions — genuine owner-only calls arrive as a short recommended A/B/C choice, not a technical homework assignment.
It is Markdown, not an orchestration framework: no application runtime, server, or vendor lock-in. Install as a Claude Code plugin, symlink into Codex / Cursor (see install script), or run prompts-only on Grok Build (and other hosts) via the per-host references.
One loop is a queue, not a single story. Each round still does one ledger item end-to-end (implement → verify → record), but the ledger can hold many long items at once — related milestones or unrelated backlog (the gate-wait backlog pattern is the extreme case: useful work with no dependency on the item under audit). You do not need a new graph every time the next long task is about something else.
The host is swappable; the files are not. A compiled loop-graph run freezes
prompts and state under .longgraph/<date-slug>/. To continue elsewhere:
- Use a workspace that can see those files (and the project).
- Re-send the same frozen executor (and, if used, supervisor) prompt on the new host.
- The node reads
ledger.md/directives.mdand continues from the next open item.
You are not exporting chat transcripts. Invocation syntax still follows each host’s dialect (per-host references) — only the progress is portable.
| Your task shape | Choose | What you get |
|---|---|---|
| One self-contained goal that fits a normal task/session | Use the host's ordinary task or goal directly | No longgraph wrapper or extra prompt layer |
| Many rounds, durable state, non-skippable gates, owner boundaries, host switching, or independent verification | longgraph / loop-graph | An executor loop plus a clean-context supervisor, coordinated through durable files |
Rule of thumb: if you do not need the graph, do not use longgraph.
Install the plugin from the marketplace:
/plugin marketplace add levi-qiao/longgraph-skill
/plugin install longgraph@longgraph-skill
Install the library and symlink /longgraph (plus legacy /octopus) into hosts
whose loaders follow symlinks:
curl -fsSL https://raw.githubusercontent.com/levi-qiao/longgraph-skill/main/install.sh | shFrom a local clone, run ./install.sh at the repository root.
Author on Claude Code or Codex when you want direct node creation, or choose
prompts-only and paste the frozen executor / supervisor pointers into
Grok Build /loop tasks (same run
directory). Cursor and shell/cron use the same prompts-only path — see
host compatibility.
Invoke /longgraph. It detects Codex or Claude Code, inspects the workspace, and asks
only for unresolved owner decisions before compiling the run. Choose direct creation
to have it start both same-host runtime nodes, or prompts-only for manual/cross-host
launch (including Grok Build). You can also invoke loop-graph directly.
Authoring and runtime stay separate: the author skill compiles the work but never
executes it. Generated nodes follow their frozen run contract under
.longgraph/<date-slug>/.
| Role | Responsibility | Durable edge |
|---|---|---|
| Executor | Works one ledger item, verifies it in the same round, then records the result | Reads and writes ledger.md |
| Supervisor | Re-verifies from its own separate context, checkpoints passing work, and corrects drift | Reads the ledger; writes only the directives edge (live queue + cold archive) |
| Scout (optional) | Researches a bounded question away from the critical path | Writes a findings file read only on reference |
The load-bearing rule is one node = one prompt + one single-writer edge. The ledger has exactly one writer. The supervisor never shares the executor’s context, never edits its scoreboard, and steers only through the one-way directives edge.
For the rationale behind every constraint, read the methodology. For the node and edge model, see the loop-graph model.
| Host | loop-graph execution |
|---|---|
| Codex | ✅ detects the host and directly creates both runtime nodes |
| Claude Code | ✅ detects the host and directly creates two background runtime sessions when capability checks pass |
| Grok Build | prompts-only — two /loop tasks (executor + supervisor), no wake edge |
| Cursor | prompts-only execution target |
| shell / cron | prompts-only execution target |
Authoritative syntax, pacing, context carry, and hooks live in separate per-host references, so authoring loads only the selected host. Mid-run host switches reuse the same durable run directory; only how you start each tick changes.
| Was (legacy / still accepted) | Now (primary) |
|---|---|
Product octopus, repo octopus-skill |
longgraph, repo longgraph-skill |
Slash /octopus |
/longgraph (install still symlinks /octopus → same tree) |
Plugin octopus@octopus-skill |
longgraph@longgraph-skill |
Run dir .octopus/<date-slug>/ |
.longgraph/<date-slug>/ (continue in-flight .octopus/ runs in place) |
Contract octopus.loop-graph.* |
longgraph.loop-graph.* (old headers on existing files still mean the same family) |
GitHub renames redirect old clone/curl URLs (…/octopus-skill/… → …/longgraph-skill/…).
Re-run install.sh or reinstall the plugin once so primary names win on disk.
| Path | Purpose |
|---|---|
Root SKILL.md |
/longgraph entrypoint; checks fit and delegates authoring to loop-graph |
| Loop-graph author | Generates executor, supervisor, ledger, and directive artifacts |
lib/ |
Shared methodology |
| Host references | One independently loaded owner for each host's runtime facts |
| Worked examples | Public-Git self-iteration plus fictional ledgers showing gates in action |
| Public / private boundary | What may enter the public tree vs stay project-local |
longgraph applies its own anti-bloat rule to the library: no prompt enters without a real run that proved its value. Curated and opinionated beats comprehensive.
Contributions are welcome. Start with the contribution guide.
The loop-graph skill grew from real runs and community input. A
public-Git self-iteration case
records how the method was hardened into this library. Special thanks to
@BrightProgrammer7 for the
migrate-blob-storage example and the discussions that sharpened milestone
gates and the node/edge vocabulary.