Second root cause of the jail-spawn EACCES (found via truss, docs PR #132):
for staged spawns the daemon writes launch.sh/env.sh under
<jail_root>/var/run/colibri-stage/<stage_id>/, but nothing created
/var/run/colibri-stage. The daemon runs as clawdie and cannot mkdir under
root-owned /var/run, so staging failed with Permission denied.
agent-jail-bootstrap.sh now pre-creates the dir owned by the daemon user
(0700), replacing the runtime `chmod 777` workaround — durable across jail
rebuilds and not world-writable (staged files are sourced as shell, so a
world-writable staging dir would be a privilege footgun). DAEMON_USER is
overridable, defaulting to clawdie.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
