add responses compaction fallback for fast sessions

[ndycode]

Summary

• compact fast-session inputs through the Responses compaction endpoint before local trimming
• fall back to the existing trim heuristics when server-side compaction is unavailable
• gate compaction support by normalized model capabilities

Stack

• base: #311

[chatgpt-codex-connector]

Codex usage limits have been reached for code reviews. Please check with the admins of this repo to increase the limits by adding credits.
Credits must be used to enable repository wide code reviews.

[coderabbitai]

Warning

Rate limit exceeded

@ndycode has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 19 minutes and 9 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: bd27cfd4-0953-4ffc-a45b-5ce594697076

📥 Commits

Reviewing files that changed from the base of the PR and between 6a273fe and b7fef3e.

📒 Files selected for processing (11)

• index.ts
• lib/request/fetch-helpers.ts
• lib/request/helpers/model-map.ts
• lib/request/request-transformer.ts
• lib/request/response-compaction.ts
• lib/session-affinity.ts
• test/codex-manager-cli.test.ts
• test/index.test.ts
• test/model-map.test.ts
• test/request-transformer.test.ts
• test/response-compaction.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/openai-parity-pr4

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch feat/openai-parity-pr4

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[ndycode]

@coderabbitai review

[coderabbitai]

✅ Actions performed

Review triggered.

Note: CodeRabbit is an incremental review system and does not re-review already reviewed commits. This command is applicable only when automatic reviews are paused.

[ndycode]

@coderabbitai review
@greptile @cubic review

[coderabbitai]

@ndycode: triggering a review of pr #312 now. will check compaction fallback logic, fast-session trim deferral, and model capability metadata changes.

✅ Actions performed

Review triggered.

Note: CodeRabbit is an incremental review system and does not re-review already reviewed commits. This command is applicable only when automatic reviews are paused.