Local marketplace plugin is enabled but its plugin skills are not exposed in Codex sessions

[alario-tang]

Summary

A local marketplace plugin is enabled and its plugin manifest points to a valid skills directory, but Codex sessions do not expose the plugin's skills. This reproduces in Codex CLI and Codex App after multiple restarts.

This is currently blocking oh-my-codex plugin-mode usage without falling back to legacy skill installation.

Environment

codex-cli 0.130.0
oh-my-codex v0.16.3
macOS / arm64

Expected behavior

When a local marketplace plugin is configured and enabled, Codex should discover and expose the skills declared by the plugin manifest:

{
  "name": "oh-my-codex",
  "version": "0.16.3",
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "apps": "./.app.json"
}

In this case, skills such as team, ralph, deep-interview, ultrawork, wiki, etc. should be visible in a fresh Codex session.

Actual behavior

Only the legacy/user-installed omx-setup skill is visible. The rest of the oh-my-codex plugin skills are not exposed.

A fresh codex exec session shows only these matching skills:

omx-setup
compound-engineering:ce-plan
sophi:use-agent-team

Other plugin skills from non-local/plugin-cache sources, such as compound-engineering:*, sophi:*, browser-use:*, etc., are exposed correctly. The issue appears specific to this local marketplace plugin or its layout/discovery path.

Configuration evidence

Relevant ~/.codex/config.toml entries:

[marketplaces.oh-my-codex-local]
source_type = "local"
source = "/opt/homebrew/lib/node_modules/oh-my-codex"

[plugins."oh-my-codex@oh-my-codex-local"]
enabled = true

The plugin bundle exists and contains a valid manifest:

B=/opt/homebrew/lib/node_modules/oh-my-codex/plugins/oh-my-codex
node -e "const p=require('$B/.codex-plugin/plugin.json'); console.log(JSON.stringify({name:p.name,version:p.version,skills:p.skills,mcpServers:p.mcpServers,apps:p.apps}, null, 2))"

Output:

{
  "name": "oh-my-codex",
  "version": "0.16.3",
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "apps": "./.app.json"
}

The skills are physically present:

find /opt/homebrew/lib/node_modules/oh-my-codex/plugins/oh-my-codex/skills -maxdepth 2 -name SKILL.md | wc -l
# 26

omx doctor also reports the plugin-mode install as healthy:

Resolved setup scope: user
Resolved setup install mode: plugin
[OK] Skills: plugin marketplace oh-my-codex-local registered; OMX skills are supplied by /opt/homebrew/lib/node_modules/oh-my-codex/plugins/oh-my-codex
Results: 15 passed, 0 warnings, 0 failed

Reproduction

1. Install and configure oh-my-codex in plugin mode.

2. Ensure the local marketplace and plugin are enabled in ~/.codex/config.toml:

   [marketplaces.oh-my-codex-local]
   source_type = "local"
   source = "/opt/homebrew/lib/node_modules/oh-my-codex"
   
   [plugins."oh-my-codex@oh-my-codex-local"]
   enabled = true

3. Verify the plugin manifest has skills: "./skills/" and that the skills/*/SKILL.md files exist.

4. Start a fresh Codex CLI or Codex App session.

5. Ask the model to list visible skills, or inspect the model-visible skill list.

Observed: oh-my-codex plugin skills are missing.

Local marketplace commands tried

codex plugin marketplace add /opt/homebrew/lib/node_modules/oh-my-codex

Output:

Marketplace `oh-my-codex-local` is already added from /opt/homebrew/lib/node_modules/oh-my-codex.
Installed marketplace root: /opt/homebrew/lib/node_modules/oh-my-codex

codex plugin marketplace upgrade oh-my-codex-local

Output:

Error: marketplace `oh-my-codex-local` is not configured as a Git marketplace

Questions

1. Are skills from source_type = "local" marketplaces expected to be loaded into Codex sessions?
2. If yes, is the oh-my-codex local marketplace layout valid for Codex plugin discovery?
3. Is there a required cache/install step for local marketplace plugins beyond codex plugin marketplace add <local-root> and [plugins."name@marketplace"].enabled = true?
4. If this is a Codex loader bug, could Codex surface diagnostics explaining why a plugin's declared skills directory was skipped?

Why this matters

oh-my-codex plugin mode intentionally avoids legacy skill installation and relies on Codex plugin discovery for bundled skills. Falling back to legacy mode works around the symptom but defeats the plugin-mode path.

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Chrome plugin is missing from Codex Plugins on Windows even though local plugin files exist #22051

Powered by Codex Action

[alario-tang]

Thanks for the duplicate pointer. I checked #22051 and it looks related at the plugin discovery/cache layer, but I don't think this issue is an exact duplicate.

Key differences:

• Chrome plugin is missing from Codex Plugins on Windows even though local plugin files exist #22051 is about the bundled Chrome plugin on Windows Codex App, where the plugin is missing from the Plugins UI / regenerated bundled marketplace cache.
• This issue reproduces on macOS with a third-party/local marketplace plugin (oh-my-codex-local).
• The local marketplace is already configured and the plugin is enabled in ~/.codex/config.toml.
• The plugin manifest is valid and declares skills: "./skills/".
• The plugin bundle physically contains 26 SKILL.md files.
• The failure is specifically that fresh Codex sessions do not expose those plugin skills as model-visible skills in CLI/App.

So the shared root may be plugin discovery, but this issue is specifically about local marketplace plugin skill discovery / model-visible skills, not only App plugin UI listing or bundled marketplace cache generation.