PR: https://git.cafe/pingdotgg/t3code/pulls/24090
Main: 8031991591e22d76830e4acf6358c4fd78ffcf60
PR head: 6b19f41bd2c60b69ef806979132d576f2fb27344
2026-10-28, disposable Linux VM. No source changes.

Real dev servers, sequential isolated data homes. Real repository initialized at /home/user/verification-repo. Main project created through web UI using Playwright and /usr/bin/google-chrome. Real Codex gpt-6.1-sol turn read git branch and returned master MAIN_PROVIDER_OK.

An HTTP forwarding proxy relayed the actual dev server response, holding selected replies for 1800 ms. No response bodies were mocked. Runtime discovery origin was temporarily redirected to the proxy and restored afterward. This exercises latency, not actual CPU saturation.

MAIN:
project rename verification-repo slow-main: CLI ProjectLiveServerRequestError, TimeoutError after 1s. POST /api/projects/mutate actually returned HTTP 200 after 1810ms. Web UI showed slow-main despite CLI failure (screenshot).
project rename verification-repo snapshot-main: post-probe GET /api/projects delayed 1805ms, CLI ProjectLiveServerRequestError after 1s. No mutation issued.

PR:
project add verification-repo: success. POST HTTP 200, 1838ms.
project rename verification-repo verified-pr: success. Second GET HTTP 200, 1806ms. Mutation HTTP 200.
thread start --provider codex --model gpt-6.1-sol --wait verification-repo: master PR_PROVIDER_OK. Actual git shell command requested, no file edits.
Delayed probe: CLI ServerAlreadyRunningError, exit 78. No mutation issued.
Remove project with existing thread without --force: rejected by server, HTTP 400 invalid_command, exit 1. No destructive fallback.
Added project 1fe05ba7-b1b6-4196-a7c8-5a14c1424c11 (main) at /home/user/main.
[07:42:41.070] ERROR (#2): ServerAlreadyRunningError: A T3 Code server already owns /home/user/pr24090-state/userdata. Stop that server, or use a separate T3 home and pair with it, then retry. No server was stopped.
    at catch (file:///home/user/t3code/apps/server/src/serverOwnership.ts:206:13)
    at acquireServerOwnership (file:///home/user/t3code/apps/server/src/cli/project.ts:430:28)
    at acquireServerOwnership (definition) (file:///home/user/t3code/apps/server/src/serverOwnership.ts:183:46)
    at runProjectMutation (file:///home/user/t3code/apps/server/src/cli/project.ts:515:5)
    at runProjectMutation (definition) (file:///home/user/t3code/apps/server/src/cli/project.ts:383:35)
{"run":"pr-mutation","method":"GET","path":"/api/projects","status":200,"delayMs":0,"elapsedMs":27}
{"run":"pr-mutation","method":"POST","path":"/api/projects/mutate","status":200,"delayMs":1800,"elapsedMs":1838}
{"run":"pr-snapshot","method":"GET","path":"/api/projects","status":200,"delayMs":0,"elapsedMs":13}
{"run":"pr-snapshot","method":"GET","path":"/api/projects","status":200,"delayMs":1800,"elapsedMs":1806}
{"run":"pr-snapshot","method":"POST","path":"/api/projects/mutate","status":200,"delayMs":0,"elapsedMs":8}