# Verification — PR 25267 takeover

Revision: daf6e30653a135e15e7c3f7d8cda1a5f8369ddb5
Base: f88b33a16de988f86782343b348631d11432ddf2

Author implementation retained. Takeover changes simplify the GC handoff from three repeated yields/collections to one and shorten the invariant comment. No dependency, contract, cache TTL, lock or cancellation changes.

## Tests

PullRequestReadCache.test.ts: 7 baseline tests + 1 retention regression = 8 tests. Same final regression fails on the base implementation with 5 retained sweep maps; get-only detached leaves 1; invalidate-only leaves 5; both detached leaves 0. Tester and independent Claude reviewer reproduced those controls. Focused suite passes all 8 tests, including cancellation and interrupted-invalidation guards.

## Local changed-file gate

vp run check:changed exited 0: format, lint, knip (both stages), GraphQL, typecheck (2 affected packages), and focused tests (8/8). No full repository check was run. main refreshed after verification; no new changes.

## Independent reviews, round 1

Codex gpt-6.1-sol: MERGE; no confirmed findings. Cancellation, semaphore ordering, persistence, fallback and sensitive semantics reviewed. No added parser/regex, UI or wire paths.
Claude Opus 5.5: MERGE; no confirmed findings. Independently ran base and partial-fix controls, then repeated patched suite successfully. No committed scratch.

## Existing bot finding

CodeRabbit warned runtime v8.setFlagsFromString --expose-gc might fail, citing Node 8 documentation. Implementation agent tested Node 22.23.4, 24.21.0, 24.22.1 and 26.12.1 in main and worker threads; all exposed callable GC. Reviewers also ran the suite on Node 24/26. No supported failing setup reproduced; no speculative test-config change made. Node 23 was not independently executed.

## Scope and limits

Server-only change. No UI capture applies. Runtime retention evidence is recorded separately. No multi-hour production-heap claim, relay/tunnel UI claim, or unrelated memory-retention fix is made.

Models/harness: Claude Opus 5.5 (Claude harness) tests, implementation, review B; GPT-6.1 Sol (Codex harness) lead, review A, proof audit and evidence.