0.133.0 system-skills update removed Codex self-knowledge routing from openai-docs and deleted the manual-fetch fallback

Version: codex-cli 0.133.0 (auto-updated from 0.124.0, macOS)

The 0.133.0 update re-stamped ~/.codex/skills/.system/. Two capabilities were removed from the bundled openai-docs skill:

1. Codex self-knowledge routing. The pre-update SKILL.md explicitly routed Codex-about-Codex questions into this skill — its description included "use the Codex manual helper first for broad Codex self-knowledge", and it carried a ## Codex self-knowledge section covering "skills, plugins, MCP, hooks, AGENTS.md, automations, surfaces, local state, or system-map questions". In 0.133.0 the description covers only "how to build with OpenAI products or APIs" and the self-knowledge section is gone (SKILL.md is 115 lines shorter). There is no replacement skill, so those questions no longer have a documented routing path.

1. The manual-fetch fallback. scripts/fetch-codex-manual.mjs (598 lines) was deleted. Combined with #24239 (docs MCP not configured by default), sessions where the MCP is unavailable now have no fallback path — the skill references MCP tools that aren't present and has no recovery.

Questions:

• Was removing the self-knowledge routing intentional? If so, where should those questions route?
• Is there a supported way to preserve local modifications to skills/.system/ across updates? The directory is silently overwritten on update (observed twice on 0.124.0→0.133.0). If it's strictly vendor-owned, a note in the docs would prevent wasted local patching.

Repro: diff ~/.codex/skills/.system/openai-docs/ before/after the 0.124.0→0.133.0 update.