* feat(plugin): ship Codex plugin manifest + marketplace (#codex-plugins)
OpenAI Codex shipped a plugin platform
(developers.openai.com/codex/plugins) with the same shape as Anthropic
Claude Code plugins: .codex-plugin/plugin.json manifest, optional
.mcp.json, hooks/hooks.json, and a skills/ directory.
Verified against openai/codex source
(codex-rs/hooks/src/engine/discovery.rs): Codex's hook engine
explicitly injects CLAUDE_PLUGIN_ROOT into hook subprocesses for
OOTB compat with existing Claude Code plugins. The wire-format
input schemas
(codex-rs/hooks/schema/generated/session-start.command.input.schema.json
and siblings) use the same field names as Claude Code
(session_id, cwd, hook_event_name, source, transcript_path, model,
permission_mode).
Net result: our existing plugin/ directory already works as a Codex
plugin with two small additions:
1. plugin/.codex-plugin/plugin.json — Codex manifest pointing at the
shared ./.mcp.json, ./skills/, and a Codex-specific ./hooks/
hooks.codex.json. Name (kebab-case), version, description match
the Claude Code manifest.
2. plugin/hooks/hooks.codex.json — Codex-compatible hook subset.
Drops SubagentStart, SubagentStop, SessionEnd, Notification,
TaskCompleted, PostToolUseFailure (Claude-Code-only). Keeps
SessionStart, UserPromptSubmit, PreToolUse, PostToolUse,
PreCompact, Stop. Adds Codex-specific `statusMessage` decorations
on the two hooks the user sees most (SessionStart + UserPromptSubmit).
The script commands themselves still reference ${CLAUDE_PLUGIN_ROOT}
because Codex's engine injects it.
3. .codex-plugin/marketplace.json at repo root — git-subdir source
pointing at ./plugin so `codex plugin marketplace add rohitg00/
agentmemory` works the same way `claude plugin marketplace add`
does. Mirrors the existing .claude-plugin/marketplace.json shape
but in Codex's marketplace schema (name + interface.displayName
+ plugins[].source.{source, url, path, ref} + plugins[].policy).
README updates:
- Codex CLI tile in the Works-with-every-agent grid now reads
"6 hooks + MCP + skills" instead of "MCP server" to surface the
upgraded surface.
- "Other agents" install table now distinguishes "Codex CLI (MCP
only)" (existing codex mcp add path) from "Codex CLI (full
plugin)" (new marketplace install).
- New Codex section in the "paste this prompt" block with the
two-command install (server + marketplace add + plugin install),
the list of registered surfaces, and the env-var-injection note
citing the Codex source line.
6 new tests in test/codex-plugin.test.ts cover:
1. .codex-plugin/plugin.json present with kebab-case name and
required references.
2. Manifest version matches main package.json (so future bumps
don't drift the Codex side).
3. Every path referenced in the manifest resolves to a real file or
directory on disk.
4. hooks.codex.json contains only events Codex supports — any
future addition has to be added to a Codex allowlist or the
test fails loudly.
5. Every ${CLAUDE_PLUGIN_ROOT}/scripts/* command references an
existing script file (catches typos before users hit them).
6. .codex-plugin/marketplace.json declares git-subdir source with
path: "./plugin" pointing at this repo.
874 / 874 tests pass.
* fix(plugin/codex): align manifest description + assert PreCompact hook
Two reviewer findings addressed:
1. plugin/.codex-plugin/plugin.json's description claimed "12 hooks"
but Codex only registers 6 (the Codex hook input schemas don't
define SubagentStart, SubagentStop, SessionEnd, Notification,
TaskCompleted, PostToolUseFailure). Updated the description to
"6 hooks, 51 MCP tools, 4 skills, real-time viewer." so the
marketplace listing matches the registered surface.
2. test/codex-plugin.test.ts asserted five lifecycle events
(SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, Stop)
but omitted PreCompact, leaving a regression hole: dropping
PreCompact from hooks.codex.json would still pass the test
because the allowlist loop only blocks UNKNOWN events. Added
expect(events).toContain("PreCompact") so the suite enforces
the full six-hook contract.
Skipped (with reason):
3. marketplace.json source.ref currently "main" — reviewer asked
for a fixed tag/SHA. Skipping because pinning to a tag forces
updating marketplace.json on every release; "main" matches our
convention where releases tag from main HEAD and pre-release
work is on feature branches. Users wanting an immutable cut
can pass --ref vX.Y.Z to `codex plugin marketplace add` per
Codex docs.
Validation: 6/6 codex tests pass; 874/874 full suite unchanged.
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