PR 23771 runtime verification on Linux x64
main: f120c51134, separate worktree /home/user/main
Started vp run dev --no-seed, server 16733, web 8693.
Created project /home/user/t3code using web UI Add project > Local folder.
Selected Codex GPT-6.1-Sol and sent a real turn requesting preview_open.
Prerequisite: downloaded the genuine Chrome for Testing 156.0.8078.73 zip from Google's public distribution and extracted it into the shared browser install root. No fake executable or fixture archive.
Before first preview_open:
  156.0.8078.73/chrome-headless-shell --version -> Google Chrome for Testing 156.0.8078.73
After first real provider preview_open (installed pinned 156.0.8078.70):
156.0.8078.70
Google Chrome for Testing 156.0.8078.70

Follow-up with http://localhost:8693 succeeded: real provider preview_snapshot saw the pairing page. Provider closed its background tabs.

PR exact head: 6aa712f4186b6b81571d09729b6c25368c193468
vp i completed. Main dev process group 14197 stopped before PR start.
PR vp run dev --no-seed --home-dir /home/user/t3code/.t3
[dev-runner] serverPort=13773 webPort=5733 baseDir=/home/user/t3code/.t3
Created project /home/user/t3code through Add project > Local folder.
Selected GPT-6.1-Sol. Provider runtime confirmed model=gpt-6.1-sol, modelProvider=cliproxyapi.
Before first provider preview_open: genuine installed Chrome 156.0.8078.73 only.
First preview_open returned real download progress (106 of 127 MB); install continued after bounded wait. Retried successfully. Provider snapshot confirmed the pairing page rendered.
After install:
156.0.8078.70
156.0.8078.73
Google Chrome for Testing 156.0.8078.70
retained browser: 156.0.8078.73
real page: T3 CODE (DEV)

Pair with this environment

Enter a pairing token to start a session with this environment.

Pairing token
Continue
Reload app
This environment accepts one-time pairing tokens. Pairing links can open this page directly, or you can paste the token here.
Client path: preview visible in right panel. Took control, typed /pair?verification=23771 into URL field, submitted, then clicked Back. Both pages rendered. Captured short video.
Second real provider turn closed old tab, opened a new tab at /pair?reuse=23771, snapshot confirmed pairing page, and closed new tab.
Browser executable inode, size and mtime unchanged across second turn:
.t3/tools/chrome-headless-shell/linux64/156.0.8078.70/chrome-headless-shell inode=2762631 size=208764240 mtime=1793158831
.t3/tools/chrome-headless-shell/linux64/156.0.8078.73/chrome-headless-shell inode=2766687 size=209296720 mtime=1793055851
Blacksmith: vp test run apps/server/src/preview/PreviewBrowser.test.ts -> 8 passed. Worker stopped.
No source edits, commits or pushes needed. CI stored on this exact head: 27 successful, 0 pending/failing.
Limit: a second genuine Chrome distribution was installed manually; two released T3 binaries with different pins were not run. Main and PR pin the same Chrome release. No fixture archive or fake executable was used.
Unverified: two concurrent T3 servers on one home, Windows/macOS, native mobile, relay/tunnel.
Separate observation: floating-preview dock button pointer click was intercepted by the canvas; focusing the button and pressing Enter docked it. This is outside the installer diff and was left unchanged.