docs(codex-plugin): install via GitHub marketplace + uninstall commands#232
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Empirically reproduced (Codex CLI 0.133.0) — `codex plugin add` writes [marketplaces.atlan] to ~/.codex/config.toml but does NOT write [mcp_servers.atlan]. The plugin entry appears in Plugins → Manage but the MCP server is never registered, so tool discovery returns 0 tools and the agent silently falls back to spawning `codex exec` subprocesses. `codex mcp add atlan --url https://mcp.atlan.com/mcp` writes the proper [mcp_servers.atlan] section AND auto-launches the OAuth flow in one step. No `--type` / `--transport` flag needed — Codex infers HTTP from the URL. Simplify the install section to one command that works. Keep the "Once OpenAI's Plugin Directory is GA" stub for when the official distribution path goes live. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
Two README updates for the Atlan Codex plugin:
codex plugin marketplace add https://github.com/atlanhq/agent-toolkit) so the plugin lands properly in Plugins → Manage with logo + metadata. Add a third step to register the MCP server (codex mcp add) until upstream Codex CLI fixes the underlying bug.Bug confirmed
Empirically reproduced (Codex CLI 0.133.0) —
codex plugin addwrites[marketplaces.atlan]to~/.codex/config.tomlbut does NOT write[mcp_servers.atlan]. The plugin appears in Plugins → Manage but the MCP server is never registered; tool discovery returns 0 tools; the agent silently falls back to spawningcodex execsubprocesses.codex mcp add atlan --url https://mcp.atlan.com/mcpwrites the proper section AND auto-launches OAuth in one step.Recommended install (3 commands)
Step 3 is needed today because of the upstream Codex CLI bug. The README explains this in one sentence and notes that the step will become unnecessary once Codex CLI honours the plugin's bundled
.mcp.json.Uninstall section
Plus a note that some older Codex CLI versions leave a stale
[mcp_servers.atlan]block aftercodex mcp remove, requiring manual cleanup.Tested end-to-end
Ran the 3-command install on a clean profile (Codex CLI 0.133.0) — all three steps succeeded; OAuth flow auto-launched on step 3 with the expected
https://mcp.atlan.com/oauth/authorize?...URL.Follow-up
Upstream issue at openai/codex so
codex plugin addis taught to honour the plugin's bundled.mcp.json— to be filed separately.🤖 Generated with Claude Code