Make the agent-toolkit installable as a Codex plugin under the name
`sanity` via a Codex-native marketplace, reusing the existing shared
skills and MCP server config without touching the Claude or Cursor
plugin assets.
- Add `.codex-plugin/plugin.json` manifest pointing at `./skills/` and
`./.mcp.json`, with rich `interface` metadata (display copy, category,
capabilities, brand color, logo, default prompts) modeled after the
Sanity Claude connector listing.
- Add `.agents/plugins/marketplace.json` exposing a single `sanity`
plugin entry with `policy.installation = AVAILABLE` and
`policy.authentication = ON_INSTALL`.
- Update README with a Codex MCP install block and a Codex plugin
install section, and mention `.agents/plugins/` and `.codex-plugin/`
in the repo structure.
- Add `codex` to package.json keywords.
Co-authored-by: Cursor <cursoragent@cursor.com>
Jonah Snider