Multi-agent plugin support: Codex, opencode, GitHub Copilot#5
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US-010: a developer can install ix-flow as a plugin in Claude Code, OpenAI Codex, opencode, or GitHub Copilot. NFR-005: the single skills/ tree is the sole source of skill content; per-agent manifests add only discovery metadata and never duplicate skill bodies. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add per-agent install manifests that all reuse the single skills/ tree: - .codex-plugin/plugin.json + .agents/plugins/marketplace.json (Codex 'codex plugin marketplace add') - .github/plugin/marketplace.json (Copilot 'copilot plugin marketplace add'; Copilot also reads the existing .claude-plugin/plugin.json) - opencode installs via 'gh skill install --agent opencode' (no new files) Per FR-001 the npm tarball stays dist/bin/LICENSE/README only — the plugin manifests install from the GitHub repo, so package.json files[] is unchanged. Restructure the README ## Install into collapsible per-agent sections. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
New smoke/agents.sh Stage 3 (filesystem-install depth): Codex via 'codex plugin marketplace add' + 'codex plugin add' (validates the new manifest); opencode and Copilot via 'gh skill install --agent ...'. Dockerfile adds gh (official apt repo) + @openai/codex; run.sh forwards a GH token; the gh-skill stages skip (not fail) when no token, and CI passes GITHUB_TOKEN. Verified PASS for all four agents (PLUGIN_SOURCE=local). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Make
ix-flowinstallable as a first-class plugin in OpenAI Codex, opencode, and GitHub Copilot, alongside the existing Claude Code path. All four agents install the same two skills (ix-flow,ix-flow-create) from the sameskills/<name>/SKILL.mdtree — per-agent manifests add only discovery/install metadata.Install paths
/plugin marketplace add agent-ix/ix-flow+/plugin installcodex plugin marketplace add agent-ix/ix-flow+codex plugin add ix-flow@ix-flow.codex-plugin/plugin.json,.agents/plugins/marketplace.jsongh skill install agent-ix/ix-flow --all --scope user --agent opencodeskills/)copilot plugin marketplace add agent-ix/ix-floworgh skill install … --agent github-copilot.github/plugin/marketplace.json(Copilot also reads existing.claude-plugin/plugin.json)Changes
US-010(install in the agent of choice) +NFR-005(single skills tree, no per-agent duplication); Quire-validated.FR-001the npm tarball staysdist/bin/LICENSE/READMEonly; manifests install from the GitHub repo, sopackage.jsonfiles[]is unchanged.## Installrestructured into collapsible per-agent<details>sections.make install-smokeextended from Claude-only to a 4-agent Stage 3 (filesystem-install depth). Codex via its native CLI (validates the new manifest); opencode/Copilot viagh skill. CI passesGITHUB_TOKEN; gh-skill stages skip (not fail) without a token.Verification
make install-smoke(PLUGIN_SOURCE=local): PASS — Claude Code (skills load as/commands) + Codex + opencode + GitHub Copilot (both skills land on disk).gh skill install … --agent github-copilotlands skills in~/.copilot/skills/;codex plugin marketplace addregisters and installs the plugin.🤖 Generated with Claude Code