Follow-ups on the salvaged commit (#37207 by @charzhou):
- Persistent /root home mount translates too: an agent writing
/root/out.png produced a real host file under
<sandbox>/docker/default/home the gateway could not find.
- /root/.hermes cache mounts translate to the HOST cache (longest-prefix
beats the home mount), so MEDIA:<agent_visible_image> paths deliver.
- /root/.hermes/* OUTSIDE a cache mount never translates through the home
mount: those are the sandbox's credential copies (.env, auth.json) that
sit outside the host-side denylist prefixes — fail closed.
- Run the idempotent terminal-config->env bridge before mount parsing so
in-process gateways (Desktop backend, hermes serve) see the active
backend and docker_volumes (covers #42299's /output case there too).
Teknium
238351a60c