PR 22366, head a4843c9a952e8995ce534c5a543f44eeae324d03
Linux Boat VM, Chrome + Playwright, running Vite web client and real server.
Project, repository, threads, and commits created through app + Codex gpt-6.1-sol.
24 differing tracked assets; real git smudge filter: sleep 1; cat.

BEFORE: github/main ce9e016406
UI ref selector main -> feature
Result: GitVcsDriver.switchRef.checkout: Git command timed out.
$ git branch --show-current
main
$ git status --short
9 modified assets, 1 deleted asset. Checkout was killed partway.

AFTER: exact PR head
UI ref selector feature -> main
07:19:27.205 vcs.switchRef request sent
07:19:51.431 Success {refName:main} received (24.226 seconds)
$ git branch --show-current
main
$ git status --porcelain
(empty)

Cancellation and cache refresh:
07:21:33.146 UI main -> feature
07:21:36.770 browser reload (request disconnected)
07:21:39.758 vcs.listRefs: main current=true, feature current=false
07:22:10.049 vcs.listRefs: feature current=true, main current=false
$ git branch --show-current
feature
$ git status --porcelain
(empty)
$ git diff --exit-code feature -- assets
(exit 0: all 24 assets match target)
Post-checkout hook emitted 1,200,000 bytes to stderr and reached final log write.

Neighbor: uncommitted edit to assets/part-01.txt.
UI checkout refused; HEAD remained main and LOCAL EDIT MUST SURVIVE remained intact.
Reverse switching completed cleanly. Real Codex turn on PR confirmed final contents.

Blacksmith:
vp test run src/vcs/GitVcsDriverCore.test.ts src/vcs/GitVcsDriver.test.ts src/git/GitManager.test.ts
3 files passed, 399 tests passed.
No source changes.