PR 25258 verification, 2026-11-01, Linux Boat VM
baseline github/main: 8b74a69019
exact PR head: 5f0b57cdd2fc1b76dfa683508752904abb6d3221
vp i: passed in each checkout
one background dev server at a time; baseline stopped before PR startup
main: server 16733 / web 8693
PR: server 13773 / web 5733
Playwright 1.60.0 with /usr/bin/google-chrome
Created projects via Add project > Local folder in real web client.
Real Codex gpt-6.1-sol: alpha file creation, alpha replacement plus beta creation; both completed.
Main reload CDP coverage: deriveThreadCheckpointSummaries 1 call; findLast predicate 5 calls.
PR browser-only proxy instrumentation on actual projection: 2 eligible checkpoints, 5 messages, 4 runId reads; original algorithm on same projection: 5 reads; final assistant IDs equal. No source files changed.
Review turn 1: alpha-one, +1/-0.
Review turn 2: alpha-one -> alpha-two, beta-one creation, +2/-1.
Read-only real Codex follow-up: alpha-two and beta-one confirmed; no new changed-file card.
Reload: prior answer/checkpoint associations and historical review preserved.
Files on disk: alpha.txt=alpha-two newline; beta.txt=beta-one newline.
blacksmith-check: vp test run packages/client-runtime/src/state/threadCheckpoints.test.ts: 13 passed.
blacksmith-check: vp run check:changed 6d46336476941257d774be7c7733e9caf201fec2: format, lint, knip, 7 package typechecks, focused tests passed.
Unverified: native iOS/Android, Electron shell, non-Codex providers, remote/relay/tunnel, large-history latency, battery impact.
No code changes required. No commit or push.