Environment: Linux; real T3 development server + CLI; fresh isolated database; synthetic Git repository.
Commit: 9d2c911b27d85bba9d5002e17deead519837d517
Recording: 1440x900 terminal, dark theme. Paths and configured model are redacted.
$ git init -b main
Initialized empty Git repository in $SAMPLE_REPO/.git/
exit=0
$ git -c user.name=Synthetic -c user.email=synthetic@example.invalid commit --allow-empty -m initial
[main (root-commit) 8ca3adb] initial
exit=0
$ git worktree add -b feature/taken $RUN/occupied
Preparing worktree (new branch 'feature/taken')
HEAD is now at 8ca3adb initial
exit=0
$ git branch feature/idle

exit=0
$ t3 project add $SAMPLE_REPO --title Branch launch evidence --base-dir $ISOLATED_HOME
Added project 26e66e04-9e5f-46ee-b2e4-f5fcbb5ace28 (Branch launch evidence) at $SAMPLE_REPO.
exit=0

CASE: feature/taken
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0
$ t3 thread start --json --worktree main --branch feature/taken --provider <configured-provider> --model <configured-model> $SAMPLE_REPO "reply ok" --base-dir $ISOLATED_HOME
Branch "feature/taken" already exists in project "Branch launch evidence". No thread was created. Pass a branch name that does not exist yet, or omit branch to get a generated name.
exit=1
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0

CASE: feature/idle
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0
$ t3 thread start --json --worktree main --branch feature/idle --provider <configured-provider> --model <configured-model> $SAMPLE_REPO "reply ok" --base-dir $ISOLATED_HOME
Branch "feature/idle" already exists in project "Branch launch evidence". No thread was created. Pass a branch name that does not exist yet, or omit branch to get a generated name.
exit=1
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0

CASE: main
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0
$ t3 thread start --json --worktree main --branch main --provider <configured-provider> --model <configured-model> $SAMPLE_REPO "reply ok" --base-dir $ISOLATED_HOME
Branch "main" already exists in project "Branch launch evidence". No thread was created. Pass a branch name that does not exist yet, or omit branch to get a generated name.
exit=1
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0

CASE: feature/unused
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[]
exit=0
$ t3 thread start --json --worktree main --branch feature/unused --provider <configured-provider> --model <configured-model> $SAMPLE_REPO "reply ok" --base-dir $ISOLATED_HOME
{"threadId":"mcp:962d6e01-6078-4276-ae81-f2f9bc5eb2a3","projectId":"26e66e04-9e5f-46ee-b2e4-f5fcbb5ace28","runId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1"}
exit=0
$ t3 thread show mcp:962d6e01-6078-4276-ae81-f2f9bc5eb2a3 --json --base-dir $ISOLATED_HOME
{"thread":{"threadId":"mcp:962d6e01-6078-4276-ae81-f2f9bc5eb2a3","projectId":"26e66e04-9e5f-46ee-b2e4-f5fcbb5ace28","title":"reply ok","link":"https://app.t3.codes/threads/c0751025-ac36-4967-9ea0-e1b61be7203b/mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3","createdBy":"agent","creationSource":"mcp","status":"running","latestRunId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1","activeRunId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1","providerInstanceId":"devReplay","model":"<configured-model>","runtimeMode":"full-access","interactionMode":"default","linkedPullRequest":null,"pullRequests":[],"titleRegeneration":null,"branch":"feature/unused","worktreePath":"$CHECKOUT/.t3/worktrees/sample-repo/feature-unused-9a136d3e64869da9","parentThreadId":null,"relationshipToParent":null,"runCount":1,"itemCount":7,"pendingRequestCount":0,"archived":false,"settled":false,"settledAt":null,"snoozed":false,"snoozedUntil":null,"createdAt":"2026-11-10T22:30:59.508Z","updatedAt":"2026-11-10T22:31:02.532Z"},"messages":[{"role":"user","runId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1","text":"reply ok"},{"role":"assistant","runId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1","text":"The project has a single math module. I will add a `clamp` helper beside `sum`.\n\n"}]}
exit=0
$ t3 thread list --project $SAMPLE_REPO --json --base-dir $ISOLATED_HOME
[{"threadId":"mcp:962d6e01-6078-4276-ae81-f2f9bc5eb2a3","projectId":"26e66e04-9e5f-46ee-b2e4-f5fcbb5ace28","title":"reply ok","link":"https://app.t3.codes/threads/c0751025-ac36-4967-9ea0-e1b61be7203b/mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3","createdBy":"agent","creationSource":"mcp","status":"running","latestRunId":"run:thread:mcp%3A962d6e01-6078-4276-ae81-f2f9bc5eb2a3:ordinal:1","providerInstanceId":"devReplay","model":"<configured-model>","runtimeMode":"full-access","interactionMode":"default","linkedPullRequest":null,"pullRequests":[],"settled":false,"settledAt":null,"snoozed":false,"snoozedUntil":null,"parentThreadId":null,"relationshipToParent":null,"itemCount":8,"createdAt":"2026-11-10T22:30:59.508Z","updatedAt":"2026-11-10T22:31:03.030Z"}]
exit=0