Greptile Summary

This PR fixes a transport misconfiguration bug where openai-codex provider instances resolved through the forward-compat fallback path would have their api overridden to openai-responses and their baseUrl set to api.openai.com/v1 when a user's provider config contained those values — causing GPT-5.4 Codex requests to be routed through the wrong /v1/responses endpoint instead of the Codex-specific chatgpt.com/backend-api.

Key changes:

• Adds isOpenAIApiBaseUrl and isOpenAICodexBaseUrl helpers to detect "known-codex" and "known-openai-api" base URLs.
• Adds normalizeOpenAICodexTransport which, for openai-codex providers only, coerces openai-responses → openai-codex-responses and resets api.openai.com/v1 → chatgpt.com/backend-api, while leaving intentional custom proxy URLs untouched.
• Wraps the four model-resolution return sites in normalizeResolvedModel, which chains normalizeOpenAICodexTransport before the existing normalizeModelCompat.
• Adds a regression test covering exactly the misconfigured api.openai.com/v1 + openai-responses scenario.

Confidence Score: 4/5

• Safe to merge — narrowly-scoped fix with targeted test coverage and no changes to other provider flows.
• The normalization logic is correct: useCodexTransport and nextBaseUrl are computed consistently, the early-return identity check prevents unnecessary object allocation, and the fix is only applied to the openai-codex provider. All four resolution sites are updated. The one minor observation is that the OpenRouter hardcoded path (line 204) still calls normalizeModelCompat directly instead of the new normalizeResolvedModel wrapper — but since normalizeOpenAICodexTransport is a strict no-op for any provider other than openai-codex, this has no runtime impact. Score is 4 rather than 5 only because there is no explicit test for the symmetric scenario where baseUrl is already chatgpt.com/backend-api but api is incorrectly openai-responses.
• No files require special attention.

_{Last reviewed commit: 8082894}

fix

Landed via temp rebase onto main.

• Gate: pnpm exec vitest run src/agents/pi-embedded-runner/model.test.ts src/commands/models/list.list-command.forward-compat.test.ts; pnpm build; pnpm check
• Land commit: 63f82e0
• Merge commit: $(gh pr view 38736 --repo openclaw/openclaw --json mergeCommit --jq '.mergeCommit.oid')

Thanks @0xsline!