Once a container is adopted, it could not be adopted a second time. But a
container usually holds more than one project directory, and opening a case for
another one had no path forward except starting a second container — precisely
what adoption exists to avoid.
The original reason was in a comment: two cases sharing an adopted container
would make one case's teardown race the other's launch on the same tmux server.
That reason does not hold. The in-container tmux session name is
dockerTmuxSessionName(sessionId), i.e. codeman-dkr-<id8>, keyed by SESSION and
not by case, and buildDockerKillCommand tears down exactly that name, so killing
A never touches B — hosting multiple sessions is what a tmux server is for.
The other three routes into an adopted container's lifecycle do not pass through
here either, confirmed one by one: the stop and remove builders throw outright;
recreate refuses `owned === false` before it even resolves the container name;
and orphan reaping filters on `label=codeman.managed=1`, which a user-built
container does not carry — a structural exclusion.
That leaves exactly three cases worth refusing, none of them tmux-related, split
into the pure, unit-tested classifyAdoptContainerConflict:
- owned-case the container belongs to a Codeman-created case, whose lifecycle
Codeman manages: one recreate or delete there would pull the
container out from under the adopting case.
⚠️ `owned` may be absent and absent means owned (cases predate
the field), so the test is `!== false`, not truthiness.
- other-owner already adopted by a different user. Adoption hands out a shell
inside someone else's container.
- duplicate same container, same directory. The second case would behave
identically to the first, so name the existing one rather than
silently minting a twin. A different in-container directory is
the case this change exists to support and passes.
(cherry picked from commit 1cb6bde891)
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
feat(docker): attach a case to an already-running container
Conflicts came from work that landed after the PR was opened, and each is
resolved onto the newer abstraction rather than by keeping the older code:
- `defaultDockerCommandForMode` is registry-driven since #347, so the PR's
`runsAsRoot` arm became `overlays.docker.rootCommand` (claude only). Claude
Code still refuses `--dangerously-skip-permissions` as root in 2.1.261 and the
refusal is visible only inside the container, so an adopted root container
otherwise just shows a dead pane. Which flag to drop is a per-CLI fact, and
`test/cli-registry-no-id-branching.test.ts` forbids expressing it as a branch.
- The probe's mode list and its mode -> binary table both duplicated the
registry. They now read `enabledCliIds()` / `discovery.binaries[0]`, which is
also what fixes the merge's silent regression: the hand-written list predates
`omp`, and the run menu gates every docker case on this probe, so owned
containers would have lost that mode. `shell` needs no arm — it declares no
binary, so it is dropped from the lookup and reported available regardless.
- The per-mode `mode === 'claude' && !cliDir` chain in `tmux-manager.ts` is one
`missingCliMessage(mode)` gate since #347; the PR's docker exemption moved onto
it. Its test now pins the single gate instead of counting seven arms.
- The create arm keeps #349's swap-limit warning filter, which the adopted arm
never reaches; the run-mode list gains `omp` from #353.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TecFD9hvPYJ1mkkMtBQbT1
The run menu still offered every mode for an attached container. The browser's
actual request showed why:
POST /api/docker-cases/adopt-preflight -> 400
{"error":"Invalid input: expected object, received string"}
_api serializes `body` and sets Content-Type itself, and three call sites each
passed an already-stringified body, so it was encoded twice and the server saw a
JSON string where it expects an object. curl was fine throughout, so nothing in
the server logs pointed at it.
Also fixes the design defect underneath: a failed probe fell through to "do not
gate", which silently offered every mode. When the container has been recreated,
is stopped, or the engine is unreachable, the user sees claude, clicks it, and
it can only fail — with the reason visible nowhere. A failed probe now hides
every agent mode (Shell needs no CLI and stays) and shows the server's own
reason at the top of the menu.
Two static guards switched from a character window to brace matching. They
sliced between two call sites, and _loadRunModeHistory's call appears above its
definition, so the slice came out empty and the assertion verified nothing —
the same trap twice in one file.
Both paths in the adoption form had to be typed. Each gets a Browse button
using the same path-input-group markup Link Existing uses, so the two look and
behave alike.
What they can browse differs, and that is the point. The host workspace path
reuses the existing host picker. The container workdir cannot: an adopted
container has nothing mounted at a matching host path, so a host listing would
be a different filesystem — and getting this field wrong is the source of the
opaque OCI chdir error at launch, which makes it the field that most needs to
be clickable.
Adds a read-only POST /api/docker-cases/browse: one `ls` through docker exec, no
writes, no lifecycle, path shell-escaped like every other value. `ls -Ap` marks
directories with a trailing slash and keeps names with spaces intact.
PathPicker takes an optional fetchListing source rather than being forked: the
container variant only swaps where the rows come from, and reuses the rendering,
navigation, Up and Choose/Select unchanged.
Attaching a container, picking claude and hitting Run gave one line —
`execvp(3) failed.: No such file or directory` — and the run-mode menu offered
every mode. Three separate defects, found on a real deployment.
TmuxManager.createSession resolved the CLI directory without distinguishing a
docker session, so a host with no claude threw, the catch fell back to a direct
PTY, and that PTY exec'd the CLI on the HOST. The failure surfaced as a bare
execvp error naming nothing. A docker session runs its CLI inside the container;
the host does not need it. All eight modes now sit behind a cliRunsInContainer
guard, and whether the container has the CLI is settled by the adoption
preflight or the image gate before launch.
The running check used a bare double quote and command substitution. The whole
chain is embedded in an outer `bash -c "…"`, so the unescaped quote closed that
string early and the remainder was re-tokenized. It is now a `grep -qx` pipeline
using only the single-quote form every other line in the builder already uses.
Claude Code refuses --dangerously-skip-permissions as root. Our base image runs
a non-root user, so an owned container never hit this; an adopted container's
user belongs to its owner and is frequently root, and keeping the flag killed
the pane with a message visible only inside the container. The preflight now
reports runsAsRoot and the launch chain drops the flag for it.
The menu also showed every mode because the container CLI probe only started
when the menu opened. It is warmed when the case is selected instead.
The run-mode dropdown hides CLIs that are not installed on the HOST (#201). That
is right for local sessions and wrong for a container case, whose agents run
inside the container: a host with no claude installed hides the mode while the
container ships one, which is exactly what happened on a real deployment.
The adoption preflight already probes what the container has, so that result is
persisted on the case and surfaced through CaseInfo. Docker cases gate on it;
every other case keeps the host probe unchanged.
An absent list reads as "do not gate" rather than "nothing available": an owned
container runs our base image, which ships every CLI, and treating unknown as
empty would leave the menu with Shell alone.
The Docker tab gains an "Attach to an existing container" toggle. Ticking it
swaps the create-time fields (image, network, advanced) — which describe a
`docker create` attaching never runs — for the container name, and routes the
submit to the adopt endpoint.
Reuses the existing linkDockerCase flow end to end: only the final call differs.
The docker-host upsert still applies, since it is what resolves the
engine/context/daemon for `docker exec`; its create-time fields are simply never
read for an attached case.
Docker cases could only run in a container Codeman created itself. Attaching to
one the user already built and runs means Codeman must leave that container's
lifecycle completely alone, which the launch chain could not do: it was
`image inspect` -> `inspect || create` -> `start` -> `exec`.
Adds `DockerCase.owned`, mirroring the `owned:false` contract remote-SSH already
uses for attached sessions. Absent (every existing case) means owned, so current
behaviour is byte-identical. `false` means the container belongs to the user and
Codeman may only exec into it.
The launch chain for an attached container only looks, then execs: no image gate
(the image is theirs), no create, and no `start` — starting a container we do not
own is the very mutation attaching promises not to perform. A missing or stopped
container fails closed with an actionable message instead. Credential seeding is
skipped too: those copies read from create-time read-only mounts that do not
exist here, and writing host credentials into someone's container is not ours to
do, so its CLIs must already be authenticated inside it.
Four fail-closed guards. buildDockerStopCommand and buildDockerRemoveCommand
throw during pure string construction, so no caller bug can turn into a
`docker stop`/`rm` on a container we do not own; removeDockerContainer refuses
again at the lowest layer; drift reports "none" for an attached container, which
carries no `codeman.confighash` label and would otherwise always look drifted and
409 the launch gate forever; and the orphan reaper skips attached containers
through a check deliberately independent of the two conditions already covering
them.
`owned` is applied AFTER the config hash is computed. dockerConfigHash takes an
explicit field list, so ownership can never shift an existing case's hash — if it
did, every pre-existing case would trip the drift gate at once, and the remedy
the UI offers is "recreate the container".
Adds POST /api/cases/docker-adopt and a read-only
POST /api/docker-cases/adopt-preflight. The preflight refuses at LINK time rather
than at session launch, where the only ways out would be a dead pane or starting
a container we do not own.
Tests assert the negative guarantee directly — that create, start, stop, rm,
restart and kill are absent from the generated commands while `docker exec -it`
and `new-session -A` remain — since it cannot be observed by using the feature.
d fei