real dev verification, GitHub PR 28944 / git.cafe PR 28944
main: d8a829e5ec
PR: ee2982b1bdd3b1c595aa527f9ecf850a49840df8

command pattern (against each running dev server):
timeout 600 node apps/server/src/bin.ts thread start --base-dir <isolated-home> --provider codex --model gpt-6.1-sol --worktree main --branch <branch> --title <title> --wait --json <project> <message>
message: Run pwd and git branch --show-current. Reply with the directory and branch. Do not change any files.

main d8a829e5ec, free generated name
{"threadId":"mcp:f633f9bc-1805-492e-80bf-f05394dcb390","runId":"run:thread:mcp%3Af633f9bc-1805-492e-80bf-f05394dcb390:ordinal:1","status":"completed","reply":"directory: `/home/user/main/.t3/worktrees/api/feature-foo`\n\nbranch: `feature/foo`","error":null}

main d8a829e5ec, colliding name
{"threadId":"mcp:0942ab16-7ddb-4a43-8046-9cfc3842b388","runId":"run:thread:mcp%3A0942ab16-7ddb-4a43-8046-9cfc3842b388:ordinal:1","status":"failed","reply":null,"error":"Workspace preparation failed during provision worktree: Git command failed in GitVcsDriver.createWorktree (/home/user/m067-scenario/api): git worktree add failed (path_already_exists)"}
Thread mcp:0942ab16-7ddb-4a43-8046-9cfc3842b388 stopped with status failed: Workspace preparation failed during provision worktree: Git command failed in GitVcsDriver.createWorktree (/home/user/m067-scenario/api): git worktree add failed (path_already_exists)

pr ee2982b, free generated name
{"threadId":"mcp:f69aaf6c-0728-4ca7-89fd-328d1ab5d628","runId":"run:thread:mcp%3Af69aaf6c-0728-4ca7-89fd-328d1ab5d628:ordinal:1","status":"completed","reply":"directory: `/home/user/t3code/.t3/worktrees/api/feature-foo`\nbranch: `feature/foo`","error":null}

pr ee2982b, colliding name
{"threadId":"mcp:5622c52f-b8e1-48c0-b275-a18f2f0db544","runId":"run:thread:mcp%3A5622c52f-b8e1-48c0-b275-a18f2f0db544:ordinal:1","status":"completed","reply":"directory: `/home/user/t3code/.t3/worktrees/api/feature-foo-2`\n\nbranch: `feature-foo`","error":null}

pr ee2982b, same folder name in second project
{"threadId":"mcp:38bca131-15a3-41e7-a623-dc60e1bd46cd","runId":"run:thread:mcp%3A38bca131-15a3-41e7-a623-dc60e1bd46cd:ordinal:1","status":"completed","reply":"directory: `/home/user/t3code/.t3/worktrees/api/feature-foo-3`\n\nbranch: `feature/foo`","error":null}

pr ee2982b, duplicate branch guard
{"threadId":"mcp:68c78915-6637-496f-af3f-b05d69ea1477","runId":"run:thread:mcp%3A68c78915-6637-496f-af3f-b05d69ea1477:ordinal:1","status":"failed","reply":null,"error":"Workspace preparation failed during provision worktree: Git command failed in GitVcsDriver.createWorktree.createBranch (/home/user/m067-pr/api): git worktree add failed (branch_already_exists)"}
Thread mcp:68c78915-6637-496f-af3f-b05d69ea1477 stopped with status failed: Workspace preparation failed during provision worktree: Git command failed in GitVcsDriver.createWorktree.createBranch (/home/user/m067-pr/api): git worktree add failed (branch_already_exists)

pr ee2982b, occupied user folder
{"threadId":"mcp:288c9bd7-4660-47d8-8a96-47286d883a9e","runId":"run:thread:mcp%3A288c9bd7-4660-47d8-8a96-47286d883a9e:ordinal:1","status":"completed","reply":"directory: `/home/user/t3code/.t3/worktrees/api/taken-2`\n\nbranch: `taken`\n\nfile contents:\n```text\nkeep-user-data\n```\n\nno files changed.","error":null}

filesystem after duplicate guard: feature-foo and feature-foo-2 only; no leaked feature-foo-3. The subsequent second-project launch used feature-foo-3 successfully.
occupied folder after launch: taken/notes.txt remains exactly keep-user-data\n; new worktree is taken-2.
web composer follow-up: real Codex turn returned verified worktree /home/user/t3code/.t3/worktrees/api/feature-foo-2 on branch feature-foo.

blacksmith: vp i && cd apps/server && vp test run src/vcs/GitVcsDriverCore.test.ts
1 file passed, 217 tests passed.
GitHub checks: all required checks pass on ee2982b.
No source changes or pushes.