Plugin skills resolve but are absent from $ autocomplete

Summary

Plugin-provided skills can resolve when typed exactly, but they are not discoverable through the $ composer autocomplete.

Reproduction

1. Install and enable superpowers@openai-curated.
2. Start a fresh Codex CLI session.
3. Type $superpowers:brainstorming in the composer.
4. Observe that autocomplete does not recognize or suggest the plugin skill.
5. Submit the exact mention anyway.

Actual behavior

The exact mention resolves and injects the skill, but it was not offered or recognized by the $ autocomplete surface.

Expected behavior

Enabled plugin-provided skills should appear in, or be searchable from, $ autocomplete so users can discover and select them without already knowing the full namespace and skill name.

Environment

• Codex CLI 0.151.0
• superpowers@openai-curated: installed and enabled
• Superpowers skill bundle: 6.3.0

Related issues

• #12366 covers skills missing from $ suggestions after restart, but this reproduction persists with an enabled marketplace plugin whose exact skill invocation succeeds.
• #14785 is related autocomplete behavior in the VS Code extension.
• #31014 tracks improvements to explicit skill-invocation UI.

Start by reproducing the issue in the Codex CLI with the enabled superpowers@openai-curated plugin, then trace the $ autocomplete path and plugin skill discovery. Done means enabled plugin-provided skills, including superpowers:brainstorming, appear in or are searchable from autocomplete while exact invocation continues to work.