pr 21340 runtime verification
head: 3a3eb59b77f8ef299882e07117b0a19fafd2a7c4
baseline: github/main 15fe283272
client: repo Playwright + /usr/bin/google-chrome on Linux; real dev servers, one at a time
provider: Codex gpt-6.1-sol through the local proxy
project and recipe documents created through the app and real provider

read-only probe: git rev-parse --git-path index; stat(index); git ls-files --debug
comparison uses entry mtime seconds versus index mtime seconds
main worktree: /home/user/main/.t3/worktrees/worktree-index-verification/t3-c62c36f2
main entries=22; entries in index's second=22; index mtime=2026-10-31T20:06:47.069Z
pr worktree: /home/user/t3code/.t3/worktrees/worktree-index-verification/t3-d3e76e4e
pr entries=22; entries in index's second=0; index mtime=2026-10-31T20:13:08.035Z
repeat pr worktree: entries=22; entries in index's second=0

git trace: main worktree creation did not run update-index -q --refresh
git trace: each pr worktree creation ran update-index -q --refresh once
pr real index SHA256 before turn: c0c1c0aa87ca6e29a73b1da2cff4fdb97873eae687dcb959dd95cb669cd2a914
pr real index SHA256 after edit/checkpoint/status/diff: c0c1c0aa87ca6e29a73b1da2cff4fdb97873eae687dcb959dd95cb669cd2a914
index timestamp unchanged after turn: true
app diff: README.md +1 -0, added Worktree verification: recipe notebook ready.
persisted checkpoint c2d5b8b01e7886f37cbcb19080caf691f0e5467a contains that line
original checkout staged status: A  STAGED.md
original checkout index bytes unchanged: true
original checkout index timestamp unchanged: true

limits: same-second condition reproduced on main; repeated content hashing/latency slowdown was not demonstrated on this Linux Git 2.43.0/ext4 VM. trace2 refresh/sum_scan counters were zero. No performance improvement is claimed. Native desktop/mobile, macOS and Windows not exercised.

blacksmith: two focused new regression cases passed
blacksmith: GitVcsDriverCore.test.ts + GitVcsDriver.test.ts: 206 passed, 1 failed
failure: preserves renames, unusual paths, modes, and binary statistics; previousPath of undefined at line 1673
failure also reproduced with the new refresh call disabled in the isolated remote worker
existing hosted CI: no failing checks (success/skipped)
no source changes, commits, pushes, merges, rebases, or label changes