Phase 7: Marketplace Packages

Create individual npm plugin packages for each supported harness marketplace (Claude Code, Codex CLI, OpenCode, Antigravity, Pi Agent).

Tasks

Task 23: Create Claude Code plugin package — Create packages/claude-plugin with package.json, postinstall.js, and .claude-plugin/plugin.json manifest. postinstall.js invokes core installer with harness='claude'. Include preuninstall.js for uninstall hook.
- Depends on: Task 20
- Files: packages/claude-plugin/package.json, packages/claude-plugin/postinstall.js, packages/claude-plugin/preuninstall.js, packages/claude-plugin/.claude-plugin/plugin.json
- Testing: Manual test: npm install in packages/claude-plugin, verify postinstall runs.
Task 24: Create Codex CLI plugin package — Create packages/codex-plugin with package.json, postinstall.js, and .codex-plugin/plugin.json manifest. postinstall.js invokes core installer with harness='codex'. Include preuninstall.js.
- Depends on: Task 20
- Files: packages/codex-plugin/package.json, packages/codex-plugin/postinstall.js, packages/codex-plugin/preuninstall.js, packages/codex-plugin/.codex-plugin/plugin.json
- Testing: Manual test: npm install in packages/codex-plugin, verify postinstall runs.
Task 25: Create OpenCode plugin package — Create packages/opencode-plugin with package.json, postinstall.js, and opencode.jsonc config template. postinstall.js invokes core installer with harness='opencode'. Include preuninstall.js.
- Depends on: Task 20
- Files: packages/opencode-plugin/package.json, packages/opencode-plugin/postinstall.js, packages/opencode-plugin/preuninstall.js, packages/opencode-plugin/opencode.jsonc
- Testing: Manual test: npm install in packages/opencode-plugin, verify postinstall runs.
Task 26: Create Antigravity plugin package — Create packages/antigravity-plugin with package.json, postinstall.js, and plugin.json manifest. postinstall.js invokes core installer with harness='antigravity'. Include preuninstall.js. Antigravity plugins are staged at ~/.gemini/antigravity-cli/plugins/<plugin_name>/.
- Depends on: Task 20
- Files: packages/antigravity-plugin/package.json, packages/antigravity-plugin/postinstall.js, packages/antigravity-plugin/preuninstall.js, packages/antigravity-plugin/plugin.json
- Testing: Manual test: npm install in packages/antigravity-plugin, verify postinstall runs.
Task 27: Create Pi Agent plugin package — Create packages/pi-plugin with package.json and postinstall.js. postinstall.js invokes core installer with harness='pi'. Note: Pi does not support MCP, only skills installed.
- Depends on: Task 20
- Files: packages/pi-plugin/package.json, packages/pi-plugin/postinstall.js, packages/pi-plugin/preuninstall.js
- Testing: Manual test: npm install in packages/pi-plugin, verify only skills installed (no MCP config).

🔗 Related PRs

#1 - Initial spec design [merged]

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Phase 7: Marketplace Packages #22