Playwright disables normal background throttling, so a hidden 5chan page keeps
doing P2P and rendering work after a check finishes. Agents verifying in
parallel across worktrees stacked whole browser engines on one machine.
Add scripts/pw-session.sh, a wrapper that permits one active Playwright browser
at a time and records who holds it:
- The lock is machine-wide, not per-repository, because the contended resource
is RAM and CPU. Every worktree and checkout shares one slot.
- Acquisition is an atomic mkdir. Stale locks clear themselves: `open` reclaims
any slot whose recorded browser is no longer `status: open` in
`playwright-cli list --all`, so an interrupted workflow cannot strand the
budget. When that list cannot be read the lock is left alone, so a broken CLI
never silently disables the budget.
- `open` exits 75 when the slot is busy; `--wait[=SECONDS]` blocks instead.
- `close` always stops the browser, even when the lock was already lost, and
never releases a slot held by a different session.
- `status` reports the holder and whether its browser is still alive.
Agent policy now runs browser engines and profiler batches sequentially, uses
Chrome/Blink during iteration and the full engine matrix only for final
verification, and never uses `close-all` or `kill-all` while other agents may
own sessions.
Covered by scripts/pw-session.test.js.
* chore(ai-workflow): track repo-managed review tooling
* fix(ai-workflow): remove repo-specific path assumptions
Make shared workflow hooks and APK testing guidance resolve paths from the repo and contributor environment so the tooling works for all contributors, not just one machine.
Tommaso Casaburi