feat(models): support gpt-5.6 family

[tatoalo]

Problem

OpenAI's GPT-5.6 preview family (gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna) is rolling out 🚀

[trunk-io]

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[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit fb200b0.}

[greptile-apps]

Comments Outside Diff (1)

1. packages/agent/src/adapters/codex-app-server/models.test.ts, line 27-46 (link)

   Missing label and direct-function test for supportsMaxEffort

   The values helper only extracts .value, so the .name field ("Max") is never asserted. The existing 'labels the extra tier "Extra High"' test covers this for xhigh; there is no parallel test for max. A typo in the name (e.g., "Maximum") would go undetected. Similarly, supportsXhighEffort has a dedicated describe block that directly imports and exercises the function, but supportsMaxEffort is not imported or directly tested — only covered indirectly through getReasoningEffortOptions.

   Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

_{Reviews (1): Last reviewed commit: "feat(models): support gpt-5.6 family wit..." | Re-trigger Greptile}

[github-actions]

Could not verify team-posthog-code membership (GitHub API error). Auto-release is limited to Team PostHog Code members, so this will ship with the next scheduled release instead.