fix(server): restore auto resume for wrapped Claude gateway rate limits

[tzachbon]

Problem

Fixes #17777.

9router can wrap a Claude upstream 429 rate_limit_error as HTTP 503 with (reset after 4m 6s). The Claude SDK reports an API-error result without a native rate_limit_event, so T3 records a provider error without resetAt. Its existing auto-resume controls and worker therefore cannot use the gateway's explicit cooldown.

Change

Normalize that specific wrapped error to a retryable usage_limit and compute resetAt from the turn completion time. Preserve native reset metadata when present. Ordinary 503s, other error types, authentication failures, and invalid cooldowns keep their existing classification.

Scope and approval

This qualifies for the small, focused obvious-bug exception in CONTRIBUTING.md: the adapter was dropping explicit usage-limit/reset information required by established recovery behavior. Only the existing Claude adapter and its regression tests change; no new setting, UI, contract, or provider is introduced. Reverting the patch restores the previous classification without a data migration.

Verification

Tested c77a7b7 plus this patch (a092c581af561f381e71bba5200a4da1e879def4) with Node 22.22.2 and pnpm 11.10.0. The declared Node 24 engine was not exercised.

• Baseline adapter with the new regression fixtures: 3 failed, 5 passed. The 4m 6s, 1h 2m 3s, and 7s cases incorrectly returned provider_error.
• Patched adapter test file: 166 passed, including exact reset timestamps, zero/malformed/overflowing cooldowns, non-rate-limit errors, and ordinary 503 classification.
• Server typecheck: passed.
• Targeted lint: passed with the existing unused layer warning; git diff --check: passed.

Commands (run sequentially):

nice -n 10 env GOMAXPROCS=2 NODE_OPTIONS=--max-old-space-size=2048 node_modules/.bin/vp test run apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts --maxWorkers=1
nice -n 10 env GOMAXPROCS=2 NODE_OPTIONS=--max-old-space-size=2048 node_modules/.bin/vp lint apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts --threads=2
nice -n 10 env GOMAXPROCS=2 NODE_OPTIONS=--max-old-space-size=2048 node_modules/.bin/tsc --noEmit -p apps/server/tsconfig.json --incremental false

Not deployed. Live recovery controls and an actual scheduled continuation were not exercised; the tests verify the adapter metadata consumed by that existing workflow. The parser deliberately accepts only the observed 9router format.

Model: gpt-6.1-sol. Harness: Codex in T3 Code.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-10T09:22:50.548031Z	a092c58	PR opened

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[macroscopeapp]

Approvability

Verdict: Approved at a092c58

Macroscope's review found this PR approvable — This is a narrowly scoped Claude adapter bug fix that restores existing auto-resume behavior for a specific wrapped rate-limit response while preserving handling of ordinary errors. Regression tests cover valid cooldowns and invalid or unrelated inputs, with no schema, default, or infrastructure changes.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The Claude adapter now recognizes qualifying 503 errors that wrap upstream 429 cooldowns. It records them as retryable usage limits and carries the calculated reset time into the result.

Changes

Claude gateway cooldown handling

Layer / File(s)	Summary
Classify wrapped cooldowns and propagate reset time apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts, apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts	The adapter classifies matching 503 api_error results with positive cooldowns as retryable usage_limit failures. It retains native reset metadata when available and uses the calculated reset time otherwise. Tests cover cooldown parsing and cases that remain provider_error.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: juliusmarminge

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Merge Risk: 🔵 Low · up to a092c

A malformed gateway message could incorrectly trigger limit recovery. Tighten the message match before merging, or accept this bounded risk.

Architecture Summary

Architecture risk: 🟡 Medium · up to a092c

The change affects 1 system.

Changed systems: apps/server

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — apps/server (service) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts: Adds cases for wrapped gateway error results with cooldowns that are parseable, zero, unknown, or overflowing, and with alternate status or error type. The test expects usage-limit classification, retryability, and a reset timestamp only when status is 503, the error type defaults to rate_limit_error, and parsed seconds are positive; otherwise it expects provider-error classification without a reset timestamp. The API-status test cases also add 503.
• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts: providerFailureFromResult now takes completedAt and, when there is no failure hint and the result is a successful errored 503 api_error, parses the specified wrapped 429 cooldown format. A positive parsed duration whose computed reset epoch is below 8.64e15 produces a retryable usage_limit failure with code api_error_429 and an ISO reset time; unmatched, zero, or out-of-range cooldowns continue to the existing classification path.
• observed — Modified behavior in apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts: Result handling now supplies completedAt to providerFailureFromResult. For usage_limit failures, it sets resetAt to the collected native reset time when available, otherwise retains the failure’s own reset time, then falls back to null.

Reliability and maintainability

• inferred — Risk-relevant change factors for apps/server: blast_radius_1; direct_dependents_1

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Pre-merge checks | 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check		The title clearly identifies the server fix and the restored auto-resume behavior for wrapped Claude gateway rate limits. It is concise and uses a conventional commit format.
Description check		The description includes complete Problem, Change, Scope and approval, and Verification sections. It explains the bug, the focused fix, the approval exception, test coverage, environment limits, and u…
Linked Issues check		Issue #17777 requires recognition of the 9router-wrapped Claude 429 rate limit in an HTTP 503 result, usage_limit classification, retryability, and resetAt metadata. The adapter now parses the obs…
Out of Scope Changes check		The changes stay within issue #17777. The diff changes only ClaudeAdapterV2.ts and its regression test. The implementation restores metadata required by the existing recovery workflow. The tests sup…

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[coderabbitai]

Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at
@apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts:
- Around line 2561-2570: Update the wrapped-429 regular expression used to
derive gatewayLimit so it matches the observed cooldown suffix ending in a
period and rejects any trailing text. Anchor the match after that period, rather
than after the closing parenthesis, while continuing to accept valid messages.

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between c77a7b7 and a092c58.

📒 Files selected for processing (2)

• apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts
• apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.ts

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