Native OpenAI docs MCP cannot fetch official Codex changelog

What issue are you seeing?

The official Codex changelog exists at:

https://developers.openai.com/codex/changelog

But the native OpenAI developer docs MCP route does not fetch it.

Current native MCP readback:

• Search for developers.openai.com/codex/changelog Codex changelog returns related changelog surfaces, but not the exact /codex/changelog document.
• Direct fetch of https://developers.openai.com/codex/changelog returns: No documentation entry found for /codex/changelog.

Feedback was also submitted through the in-app feedback flow.

Feedback ID: 019f0e86-3d2a-7031-b677-1370b1fe2358

What steps can reproduce the bug?

1. Use the native OpenAI developer docs MCP route.
2. Search for developers.openai.com/codex/changelog Codex changelog.
3. Try to fetch https://developers.openai.com/codex/changelog.
4. Observe that the exact official changelog page is not available through the MCP docs corpus.

What is the expected behavior?

The official Codex changelog page should be searchable and fetchable through the native OpenAI developer docs MCP, or it should be documented that the Codex changelog is intentionally outside that MCP docs corpus.

The RSS surface should also be considered for source-watch workflows:

https://developers.openai.com/codex/changelog/rss.xml

Why this matters

Some Codex source-watch workflows are required to check current official OpenAI/Codex docs first through the native OpenAI docs route before using direct web/RSS fallbacks. Because the official changelog page exists but the MCP fetch route returns a miss, a complete source sweep can look partial even when the official changelog page/RSS was checked directly.

A clean workflow needs to distinguish:

• native docs MCP index/fetch gap for /codex/changelog; from
• failure to check the official developer changelog page/RSS.

Related issues

I found related public issues, but none appears to be the exact native MCP fetch/index gap:

• #30099 - Changelog website does not display up-to-date versions and changes
• #23518 - Codex app renders some non-CLI changelog feed entries as raw Markdown
• #19948 - Release Notes for the Codex App?

Additional information

This is a docs-source parity issue, not a request for a product workaround. The official Codex changelog exists, but the official/native docs MCP route cannot fetch that page.