Step-by-step guide for the v3.17.0 native Anthropic Messages upstream:
add a custom Codex provider pointed at a Claude-family /v1/messages
gateway, pick the anthropic upstream format, enable local routing, and
verify the chain. Covers the auth-field choice (Bearer vs x-api-key),
the Claude Code impersonation toggle, the 8192 max-output fallback, and
a FAQ entry for gateways that restrict keys to Claude Code only.
Includes four UI screenshots captured from the real 3.17.0 app with
sample data, and links the guide from the v3.17.0 release notes in all
three languages.
- Add v3.16.4 release notes in zh/en/ja.
- Add a trilingual FAQ explaining why custom models don't show in the Codex desktop model picker (upstream Codex Desktop login-identity gating, not a cc-switch bug) and the keep-official-login mitigation; cross-linked both ways with the official-auth preservation guide.
- Align the CHANGELOG 3.16.4 release date to 2026-06-27.
New zh/en/ja guide for the unified Codex session-history toggle: what opt-in migration (on enable) and ledger-based restore (on disable) actually do, why session data is never truly deleted (tag-only rewrite + automatic backups), and how to verify files on disk versus just being filed under another provider drawer. Includes a symptom reference table for the common "my sessions are gone" misunderstanding and on-disk verification commands for macOS/Linux/Windows.
Link the guide as the lead item in the "Usage Guides" section of the v3.16.3 release notes (zh/en/ja).
Jason