PR #25207 real-environment verification, 2026-10-27 UTC
main: github/main b31de684d2, installed with vp i in /home/user/main
PR: b7aeda262010d79808c41cab438fc86952fc26dc
fixed head: eb6ea03bf8be62e2e9c1866122011e945d6f3137
Chrome: /usr/bin/google-chrome, driven by repository Playwright 1.60.0
main dev: server16733/web8693, isolated /home/user/main/.t3
PR dev: server13773/web5733, isolated /home/user/t3code/.t3

Created project through Add project > Local folder > /home/user/large-status-repo.
Used real Codex gpt-6.1-sol turns through the web composer to create/stage
6000 files, each containing hello\n, under bulk/<180 x characters>/file-NNNN.txt.
No mocks, fixtures, demo data, or database edits.

$ git status --porcelain=v2 -z --untracked-files=all | wc -c
1878000
main server: operation GitVcsDriver.statusDetails.status
  Git output exceeded 1000000 bytes and was truncated.
main UI: Changes +0 -0 disabled; Publish repository rather than Commit.
PR UI on same unborn repository: Changes +6,000 -0; Commit available.

Clicked Commit in PR web app. Message generation succeeded; Git wrote fe5715e.
UI falsely reported:
  GitVcsDriver.commit.commit: Git output exceeded 1000000 bytes and was truncated.
Existing regression extended to use driver.commit for the large initial commit.
Blacksmith regression before fix: FAIL, same GitVcsDriver.commit.commit overflow.
Fix: give commit stdout/stderr the existing 16MiB metadata budget.
Blacksmith regression after fix: PASS.

Real Codex web turn changed all6000 committed files to world\n without staging.
Captured actual subscribeVcsStatus WebSocket response:
  file count6000, insertions6000, deletions6000
  first file0000.txt and last file5999.txt present.

Real Codex web turn prepared a second unborn branch verified-large and staged6000.
$ git diff --cached --name-status | wc -c
1212000
Reinstalled vp i and restarted isolated PR server after fix.
Clicked Commit again in web app: generating message > committing > Committed dad9066.
$ git log -1 --oneline
dad9066 Add bulk text fixtures
$ git status --porcelain
<empty>

Real Codex web turn created nearby.txt with nearby\n.
Opened latest-turn checkpoint diff in UI: nearby.txt, +1 -0, actual line nearby visible.
Clicked Commit in UI; succeeded.
$ git log -2 --oneline
dc0ab8e Add nearby text fixture
dad9066 Add bulk text fixtures
$ git status --porcelain
<empty>

Blacksmith: vp run check:changed b16728af846ab00903867737f80bbd4d75cf973d
PASS format, lint (2 pre-existing warnings), knip1/2, knip2/2, GraphQL,
affected typechecks (2 packages), all164 GitVcsDriverCore tests.
Worker required explicit base history because snapshots are shallow.
Two independent read-only reviews approve fixed head.

Not exercised: native desktop/mobile clients, Windows/macOS, other providers,
remote/relay/tunnel clients, and overflow beyond16MiB.
Unrelated orphan histories cannot produce a branch merge-base diff; the initial
Changes diff reported no common commit with main. Latest-turn diff passed.