Environment: Linux; real T3 CLI and server, fresh synthetic data; before
Commit: ed52af3a478652c55aeaaf5a64bbf6584dd6a0b4

$ t3 serve --base-dir B/thread [isolated loopback port]
Server registered; statev2.sqlite exists: True
Moved statev2.sqlite and sidecars aside while server remains running.
Before command: database absent; server running: True
$ t3 thread list --base-dir B/thread --log-level error
Could not reach the T3 Code server at http://127.0.0.1:60409. T3 Code MCP endpoint responded with HTTP 401.
exit: 1
After command: statev2.sqlite recreated: True
Created data files: ["userdata/statev2.sqlite"]
Changed existing data files: ["userdata/logs/server.trace.ndjson"]
Server still running: True

$ t3 serve --base-dir B/project [isolated loopback port]
Server registered; statev2.sqlite exists: True
Moved statev2.sqlite and sidecars aside while server remains running.
Before command: database absent; server running: True
$ t3 project add B/workspace --base-dir B/project --log-level error
[06:16:00.532] ERROR (#2): ServerAlreadyRunningError: A T3 Code server already owns B/project/userdata. Stop that server, or use a separate T3 home and pair with it, then retry. No server was stopped. server-owner.sqlite is the ownership lock; do not delete it while a server is running.
    at catch (file://CHECKOUT/apps/server/src/serverOwnership.ts:217:13)
    at file://CHECKOUT/node_modules/.pnpm/effect@4.1.2/node_modules/effect/dist/internal/effect.js:799:19
    at acquireServerOwnership (file://CHECKOUT/apps/server/src/cli/project.ts:443:28)
    at acquireServerOwnership (definition) (file://CHECKOUT/apps/server/src/serverOwnership.ts:183:46)
    at runProjectMutation (file://CHECKOUT/apps/server/src/cli/project.ts:478:5)
    at runProjectMutation (definition) (file://CHECKOUT/apps/server/src/cli/project.ts:392:35)
exit: 78
After command: statev2.sqlite recreated: True
Created data files: ["userdata/statev2.sqlite"]
Changed existing data files: ["userdata/logs/server.trace.ndjson"]
Server still running: True
$ t3 thread list --base-dir B/never-created --log-level error
No running T3 Code server uses B/never-created. Start T3 Code, then retry.
exit: 1
Never-created base directory exists after thread list: True
$ t3 project add B/workspace --base-dir B/offline-fresh --log-level error
Added project 7547eba5-2ab0-4aeb-92a5-8a1b054022f8 (workspace) at B/workspace.
exit: 0
Offline fresh project add created database: True