Review follow-ups to #357. Each is a path that still touched, or still hid, a
container Codeman does not own.
**Export still mutated it.** The four fail-closed layers cover create/start/
stop/remove, but `POST /api/docker-cases/:name/export` reaches the container
twice through neither: a full export `docker commit`s it, and even a
workspace-only export `docker pause`s it first for snapshot consistency. Pause
freezes the owner's processes for as long as the tar takes, on a container we
promised not to touch. Full export is refused for an adopted case (it packages
someone else's container, with their logins, into a bundle Codeman hands out);
workspace-only keeps working and no longer pauses, accepting a live filesystem
the way `tar` does on any running host directory.
**A freshly linked OWNED case became unusable.** The run menu now probes the
container for its CLIs, and a failed probe hides every agent mode behind the
reason. For an adopted case that is right. For an owned one the container does
not exist until the first session launches it, so every newly linked Docker case
answered `container "codeman-case-x" not found (adoption never creates a
container — start it yourself first)` and offered nothing but Shell, for a
container the launch chain was about to create itself. A failed probe is
recorded only when the case is adopted; `CaseInfo.docker.owned` is on the wire
so the frontend can tell them apart. Verified in a browser: owned-with-no-
container offers all ten modes and no notice, adopted-but-stopped offers Shell
and says why.
**Multi-user gating.** Adoption is admin-only, unlike `docker-link` beside it.
Linking creates OUR container, whose sole bind mount `isWorkingDirAllowed` has
already confined to the caller's space; an adopted container's mounts are
whatever its owner gave it, so one mounting `/` hands the adopter a shell over
the whole host — exactly the workspace scoping multi-user mode exists to
enforce. Listing the engine's containers and browsing directories inside an
arbitrary one are machine-level reads and follow the docker-HOST policy for the
same reason. The preflight is deliberately not admin-only: the run menu fires it
for every docker case, so it admits a non-admin for a container already linked
to a case they can access, and nothing else.
Verified end to end against a real pre-existing root container (alpine + tmux,
no bind mounts): adopt, claude session inside it, workspace export, session
close and case unlink all left `StartedAt`, `RestartCount`, `Pid` and `Paused`
untouched; the pane ran the CONTAINER's claude, without
`--dangerously-skip-permissions`; a stopped container was refused at both
preflight and launch and was never started.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TecFD9hvPYJ1mkkMtBQbT1
- src/docker-export.ts: full-image export (pause-consistent commit + save|stream +
workspace tar + manifest -> one .codeman-container.tgz) and workspace-only; import
validates manifest + per-member sha256, traversal-guards the workspace tar, docker
load + quarantine re-tag (never overwrites a local tag). Bounded by
runWithConversionLimit; free-space precheck; docker rmi in finally; sealed
containers refuse full-image export.
- routes: POST /api/docker-cases/:name/export (background + SSE), GET/DELETE
/api/docker-exports, GET download, POST /api/docker-cases/import (-> new host+case)
- instance-scoped boot reaper (docker-hosts.reapOrphanedDockerContainers) wired after
restoreMuxSessions; never touches another instance's containers
- SSE docker:exportComplete/exportFailed/importComplete (both registries)
- fix: stream pipeline in saveImageToTar so the bundle isn't truncated
VERIFIED end-to-end on real docker: full export -> 326MB valid bundle -> delete
case -> import -> new container runs from the quarantined image with the workspace
file AND the in-image change both restored.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Codeman maintainer