feat: ship conductor as a Claude Code plugin marketplace

.claude-plugin/marketplace.json

@@ -0,0 +1,35 @@
+{
+  "$schema": "https://json.schemastore.org/claude-code-marketplace.json",
+  "name": "conductor",
+  "version": "0.1.15",
+  "description": "Conductor — multi-agent workflow orchestration via YAML",
+  "owner": {
+    "name": "Microsoft",
+    "email": "opensource@microsoft.com"
+  },
+  "metadata": {
+    "pluginRoot": "./plugins"
+  },
+  "plugins": [
+    {
+      "name": "conductor",
+      "source": "./conductor",
+      "description": "Validate, run, and execute Conductor multi-agent YAML workflows. Adds the conductor skill that knows the workflow schema, CLI commands, and execution model.",
+      "author": { "name": "Microsoft" },
+      "homepage": "https://github.com/microsoft/conductor",
+      "repository": "https://github.com/microsoft/conductor",
+      "license": "MIT",
+      "category": "workflow",
+      "keywords": [
+        "workflow",
+        "orchestration",
+        "multi-agent",
+        "yaml",
+        "copilot",
+        "claude",
+        "agents"
+      ],
+      "tags": ["agents", "automation", "workflow"]
+    }
+  ]
+}

.github/workflows/validate-plugin.yml

@@ -0,0 +1,38 @@
+name: validate-plugin
+
+on:
+  pull_request:
+    paths:
+      - ".claude-plugin/**"
+      - "plugins/**"
+      - "pyproject.toml"
+      - ".github/workflows/validate-plugin.yml"
+  push:
+    branches: [main]
+    paths:
+      - ".claude-plugin/**"
+      - "plugins/**"
+      - "pyproject.toml"
+      - ".github/workflows/validate-plugin.yml"
+
+jobs:
+  validate-json:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Validate marketplace.json and plugin.json are valid JSON
+        run: |
+          python -c "import json,sys; json.load(open('.claude-plugin/marketplace.json'))"
+          python -c "import json,sys; json.load(open('plugins/conductor/.claude-plugin/plugin.json'))"
+      - name: Verify SKILL.md exists at the expected plugin path
+        run: |
+          test -f plugins/conductor/skills/conductor/SKILL.md
+          echo "OK: plugins/conductor/skills/conductor/SKILL.md is present"
+      - name: Verify plugin.json and pyproject.toml versions match
+        run: |
+          PLUGIN=$(python -c "import json; print(json.load(open('plugins/conductor/.claude-plugin/plugin.json'))['version'])")
+          PYPROJECT=$(python -c "import tomllib; print(tomllib.load(open('pyproject.toml','rb'))['project']['version'])")
+          if [ "$PLUGIN" != "$PYPROJECT" ]; then
+            echo "Version mismatch: plugin.json=$PLUGIN pyproject.toml=$PYPROJECT"; exit 1
+          fi
+          echo "OK: both at version $PLUGIN"

README.md

@@ -115,6 +115,28 @@ conductor run workflow.yaml
 pip install git+https://github.com/microsoft/conductor.git@v1.0.0
 ```
 
+### Use the Conductor skill in Claude Code or Copilot CLI
+
+This repo doubles as a single-plugin marketplace that ships the `conductor`
+skill from `plugins/conductor/skills/conductor/`. The skill teaches the
+assistant the workflow YAML schema, CLI commands, and execution model.
+
+**Claude Code:**
+
+```text
+/plugin marketplace add microsoft/conductor
+/plugin install conductor@conductor
+```
+
+**GitHub Copilot CLI** (`gh skill` requires GitHub CLI 2.91+, public preview):
+
+```bash
+gh skill install microsoft/conductor conductor
+```
+
+The plugin ships only markdown — no executables, hooks, or MCP servers — so
+trust verification is straightforward.
+
 ## Quick Start
 
 ### 1. Create a workflow file

plugins/conductor/.claude-plugin/plugin.json

@@ -0,0 +1,17 @@
+{
+  "name": "conductor",
+  "description": "Multi-agent workflow orchestration via YAML. Ships the conductor skill so the assistant can validate, run, debug, and author workflow files for the conductor CLI.",
+  "version": "0.1.15",
+  "author": {
+    "name": "Microsoft"
+  },
+  "homepage": "https://github.com/microsoft/conductor",
+  "repository": "https://github.com/microsoft/conductor",
+  "license": "MIT",
+  "keywords": [
+    "workflow",
+    "orchestration",
+    "multi-agent",
+    "yaml"
+  ]
+}

plugins/conductor/README.md

@@ -0,0 +1,37 @@
+# Conductor (Claude Code plugin)
+
+Bundles the **conductor** skill so Claude Code can validate, run, debug, and author
+Conductor multi-agent YAML workflows.
+
+## What this plugin contains
+
+- `skills/conductor/SKILL.md` — model-invoked skill describing the workflow schema,
+  CLI commands, execution model, and authoring guidance.
+- `skills/conductor/references/` — supporting reference docs for setup, execution,
+  authoring, and the YAML schema.
+
+This plugin ships **only markdown** — no executables, hooks, MCP servers, or
+custom agents — so trust verification is straightforward: read the markdown.
+
+## Install
+
+Add the marketplace and install the plugin:
+
+```text
+/plugin marketplace add microsoft/conductor
+/plugin install conductor@conductor
+```
+
+## Local development
+
+If you're hacking on the skill from a clone of `microsoft/conductor`, point Claude
+Code at this directory directly:
+
+```bash
+claude --plugin-dir plugins/conductor
+```
+
+## Use the underlying CLI
+
+The skill orchestrates the `conductor` Python CLI. Install it separately following
+the [main project README](https://github.com/microsoft/conductor#installation).