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Codex plugin manifest is Claude-Code-shaped — MCP won't register (PUBLISH BLOCKER) #12

Description

@seanchiuai

Codex plugin manifest is Claude-Code-shaped — MCP won't register (PUBLISH BLOCKER)

Found by code-review-lead during #10 validation (validated against the real OpenAI Codex plugin spec via context7 + full-page fetch, not the self-attestation). Verdict: issues/10#issuecomment-4987419442.

The blocker

.codex-plugin/plugin.json is shaped like a Claude Code plugin, not a Codex plugin. It declares an inline "mcp": {servers:…} block, but Codex requires "mcpServers": "./.mcp.json" (a path pointer) and no .mcp.json exists. Net effect: the MCP server never registers → the plugin is inert (tools + Response Widget never load).

Required fix (Codex format)

  • Add .mcp.json — server minds, streamable-http, url https://getminds.ai/mcp, bearer token via the .mcp.json mechanism.
  • plugin.json: set "mcpServers": "./.mcp.json", DROP the inline "mcp" block.
  • Move the top-level "config" secret block into .mcp.json (not a Codex top-level field).
  • commands/ + "commands": Codex has no commands concept → those Claude-Code files are dead. Remove, OR keep only if the Claude-Desktop target needs them (see design question).
  • Add a Codex interface object (composerIcon / logo / privacyPolicyURL); iconUrl is not a Codex field.
  • Trim description to ≤200 chars (currently 206).
  • Empirical proof: real codex plugin install smoke test → MCP registers + tools list. Needs Codex installed = Sean-gated capture.

Cleared clean (no change): marketplace source:url+ref:main valid for a root-located plugin; homepage/repo resolve; all 4 SKILL.md valid + no hardcoded keys; repo-wide grep clean.

⚠️ OPEN DESIGN QUESTION (dual-client) — gated on Sean

The plugin must work in BOTH the ChatGPT/Codex desktop app AND Claude Desktop. The current inline-mcp shape IS the Claude-Code shape. Does dropping it break the Claude path? Determine whether one manifest can dual-target, or whether Codex vs Claude need distinct packaging. Resolve before restructuring.

⚠️ DECONFLICT (before ANY edit) — gated on Sean

This is a prime candidate for WHY the ChatGPT/Codex app rejected the plugin. The chatgpt-submission team (separate worktree) is investigating that rejection and may already be editing plugin.json. Confirm ownership before two teams touch the same manifest.

Constraints

Hard gates: no minds-ai-co/webapp edits; no publish; no release tag. Fix lands as a DRAFT PR (stays draft; only Sean un-drafts). Owner TBD pending deconfliction (default: frontend-lead as plugin owner; code-review-lead re-verifies — keep author≠reviewer).

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