Tasks

Add OpenSpec proposal/design/spec for the repository split.
Remove run/ from browser-owned project roots and structure checks.
Update README, local debug scripts, and Docker Compose to use RUN_REPO_DIR.
Harden local debug start/stop against stale owned listeners when pid files are missing.
Remove tracked run/ source files from browser.git.
Run scripts/check-structure.sh.
Run openspec validate split-run-into-independent-repository --strict.