PR #30136 review item O7: the plan doc was 3,191 lines — 5x the
size of any other plan in docs/plans/ and the largest reference
document in the repo. With the implementation shipped, most of
that content is either:
* The phase-by-phase TDD walkthrough (~2,800 lines): now canonical
in the PR commit log (`git log a957ef083..a6f7171a5`).
* The v2/v3 re-validation preambles: artifacts of the planning
process, no longer load-bearing.
* The full Open Questions deliberations with options A/B/C laid
out: collapsed into the Decision Log.
* The Rollout Plan and Estimated Timeline: history.
Trim to ~430 lines covering what readers actually need going
forward: the goal, architecture, scope, key design decisions
(D1–D9), risk register (now including the three risks surfaced
in PR review — `_s6_running` detection, svscanctl FIFO perms,
supervise control FIFO perms), the decision log including the
post-merge additions, and the verification checklist (now all
boxes ticked).
Header now reads 'Status: shipped' and points at the PR. The git
history preserves the full v3 plan for anyone who needs it.
PR #30136 review item O6: test_container_restart.py used fixed
`time.sleep(8)` calls after `docker restart` to wait for the
cont-init reconciler to finish. Fixed sleeps are slow when the
event happens fast and false-fail when the event happens slow.
Replace with two polling helpers:
* `_wait_for_path(container, path, kind='f' | 'd', deadline_s=...)`
— generic `test -f/-d` poller. Returns True on success, False on
timeout; callers assert with a clear message.
* `_wait_for_reconcile_log_mention(container, profile, ...)` — the
reconciler's per-profile log line is the canonical signal that
the cont-init reconcile has finished for that profile. Poll on
it instead of a sleep that hopes 8 seconds is enough.
The fixture-level setup wait is similarly migrated: it now polls
for `profile=default` in the boot log (every container always
gets a default-slot entry per item I1) and raises a clear timeout
error from the fixture if the container never finishes cont-init —
much better diagnostics than a mid-test KeyError.
The remaining `time.sleep()` calls are all internal interval_s
between probe attempts; no fixed wait points left.
PR #30136 review item O5: docker/entrypoint.sh is now a thin shim
that forwards to stage2-hook.sh — the real ENTRYPOINT is /init plus
main-wrapper.sh. External scripts that hard-coded entrypoint.sh as
the container's ENTRYPOINT will see the cont-init bootstrap happen
but the CMD will not be exec'd (because stage2-hook only handles
bootstrap; main-wrapper.sh handles the CMD passthrough).
Add a stderr warning explaining the new contract and pointing
callers at the migration path (drop the --entrypoint override).
The shim itself stays in place for one release cycle so the
deprecation isn't a hard break — anyone still invoking it sees
the warning in their logs and has time to migrate.
PR #30136 review noted the asymmetry: `register_profile_gateway`
used tmp_dir + rename to publish a new service slot atomically,
but the boot-time reconciler wrote files into the slot directly.
Same underlying concern (a concurrent s6-svscan rescan could
observe a half-populated directory), different code path.
Rewrite `container_boot._register_service` to mirror the manager:
build everything in `<scandir>/gateway-<profile>.tmp/`, then
`Path.replace` into place. If a previous interrupted run left a
`.tmp` sibling, it's cleaned up before the new build starts. If
the target already exists, it's removed before the rename so
`Path.replace` doesn't error on a non-empty target (Linux `rename`
overwrites empty targets only).
Three new tests: atomic publication leaves no .tmp leftovers,
overwriting an existing slot still leaves no .tmp leftovers, and
a stale .tmp from an interrupted run is cleaned up automatically.
PR #30136 review noted: container-boot.log was append-only with no
rotation. On a long-lived container with frequent restarts and
many profiles it would grow unboundedly (~80 B per profile per
reconcile pass).
Add a soft cap: when the file size hits 256 KiB (`_LOG_ROTATE_BYTES`,
≈3000 reconcile lines, ≈1 year of daily reboots × 5 profiles), the
current file is renamed to `container-boot.log.1` (replacing any
existing one) before new entries are appended. Worst case is two
files at ~512 KiB — well within visibility limits for grep/cat.
Rotation is intentionally simple (no logrotate or s6-log machinery
for one append-only file). Failures during rotation are logged via
the module logger and treated as non-fatal — we keep appending to
the existing file rather than dropping the reconcile entry. Three
new unit tests cover above-threshold rotation, below-threshold
non-rotation, and overwrite of an existing .1 file.
PR #30136 review caught: three `s6-setuidgid hermes sh -c "..."`
invocations in stage2-hook.sh interpolated $HERMES_HOME into a
nested shell context. Practically low-risk (a malicious HERMES_HOME
already requires container-launch privileges) but the cleaner
pattern is to invoke commands directly so the shell isn't a second
interpreter.
* `mkdir -p` of the data subdirs now runs directly via s6-setuidgid,
one path per arg.
* The .install_method stamp is written via `printf | tee` — also no
shell wrapper.
* The skills_sync invocation uses the venv's python by absolute path
instead of sourcing activate inside a shell. skills_sync.py doesn't
need anything from activate beyond sys.path, which the bin-stub
python already provides.
No behavior change. Just a smaller attack surface and a script
that's easier to read.
PR #30136 review caught: `_allocate_gateway_port()` in profiles.py
computed a SHA-256-derived port that was threaded through
`register_profile_gateway(profile, port=N)` →
`_render_run_script(profile, port, extra_env)` → and then **ignored**.
The rendered run script picked the bind port from the profile's
config.yaml (`[gateway] port = …`), never from the allocator. So
the entire allocator + parameter chain was dead code.
Remove:
* `hermes_cli.profiles._allocate_gateway_port` (deterministic
SHA-256 → [9200, 9800) — never used).
* `port` kwarg from `ServiceManager.register_profile_gateway`
(Protocol + Mixin + S6 implementation).
* `port` positional arg from `_render_run_script(profile, port,
extra_env)` — now `_render_run_script(profile, extra_env)`.
* The pass-through call in `profiles._maybe_register_gateway_service`.
config.yaml is now the single source of truth for gateway port
selection — matches reality and reduces the API surface. Three
explanatory comments in service_manager.py / profiles.py document
the retirement so future readers don't reach for the allocator and
find a ghost.
Tests: drop the three `_allocate_gateway_port` tests; update
fakes' signatures throughout test_service_manager.py and
test_profiles_s6_hooks.py to match the new no-port API.
PR #30136 review caught: docker-compose.yml still said "If you
override entrypoint, keep /opt/hermes/docker/entrypoint.sh in the
command chain." That was true under tini; under s6-overlay the
entrypoint is /init plus main-wrapper.sh, and entrypoint.sh is now
only a backward-compat shim.
Replace with an accurate description: /init must remain first in the
chain because it's PID 1 and runs the cont-init.d scripts (chown,
profile reconcile, dashboard toggle) before any service starts.
PR #30136 review caught a false positive: when HERMES_DASHBOARD was
unset, the dashboard run script did `exec sleep infinity`, so
`s6-svstat /run/service/dashboard` reported the slot as 'up'.
`hermes doctor` and any other s6-svstat-based health check saw the
dashboard as supervised-running even though no dashboard process
existed.
Add cont-init.d/03-dashboard-toggle: writes a `down` marker file
into `/run/service/dashboard/` when HERMES_DASHBOARD is falsy,
removes any leftover marker when it's truthy. s6-supervise honors
`down` by not starting the service, so s6-svstat reports 'down' —
matching reality.
The run script's HERMES_DASHBOARD case-statement stays in place as
a belt-and-suspenders guard, so the two layers can never disagree.
Two new integration tests lock the behavior: slot reports down
when unset; slot reports up when set to 1.
PR #30136 review caught: `S6ServiceManager.start/stop/restart` called
`subprocess.run(check=True)` on `s6-svc`, so any failure surfaced as
a raw `CalledProcessError` traceback. The two cases operators
actually hit are:
1. The service slot doesn't exist — most commonly because the user
typed a profile name wrong (`hermes -p typo gateway start`).
2. s6-svc itself fails — most commonly EACCES on the supervise
control FIFO when running unprivileged.
Both deserve named errors with actionable messages, not stacktraces.
Changes:
* Add `S6Error` base + two concrete errors in `hermes_cli.service_manager`:
- `GatewayNotRegisteredError(profile)` — carries the unprefixed
profile name; message: `no such gateway 'typo': register it
with `hermes profile create typo` first, or pass an existing
profile name via `-p <name>``.
- `S6CommandError(service, action, returncode, stderr)` — carries
the s6-svc rc and stderr; message: `s6-svc start on
'gateway-coder' failed (rc=111): <stderr>`.
* Factor lifecycle dispatch through `_run_svc(flag, label, name)`:
pre-checks that the service directory exists (raises
GatewayNotRegisteredError before invoking s6-svc), then runs
s6-svc and translates any CalledProcessError into S6CommandError.
* `_dispatch_via_service_manager_if_s6` in `hermes_cli.gateway`
catches both errors and prints `✗ <message>` + `sys.exit(1)`
instead of letting the exception bubble. The dispatch path that
used to dump a traceback at the user now gives an actionable
one-liner.
Tests: 6 new tests for the error types and their CLI rendering;
existing lifecycle test pre-seeds the slot directory before calling
`mgr.start` etc.
PR #30136 review caught: `hermes gateway start` (no `-p`) inside
the container resolves `_profile_suffix() == ""` → service name
`gateway-default`, but no such slot was ever registered. The Phase 4
profile-create hook only fired on `hermes profile create <name>`,
and the root profile (which lives at the top of $HERMES_HOME, not
under `profiles/`) was never one of those. So bare `hermes gateway
start` landed on `s6-svc -u /run/service/gateway-default` →
uncaught `CalledProcessError` → traceback to the user.
Changes:
1. `reconcile_profile_gateways` now always registers a
`gateway-default` slot before iterating named profiles. Its
prior state is read from `$HERMES_HOME/gateway_state.json`
(sibling to the profile root, not under `profiles/`); stale
runtime files there are swept the same way. Auto-up only if the
prior state was `running` — same rule as named profiles.
2. `S6ServiceManager._render_run_script` special-cases
`profile == "default"` to emit `hermes gateway run` with NO
`-p` flag. Passing `-p default` would resolve to
`$HERMES_HOME/profiles/default/` — a different profile that
almost certainly doesn't exist. The empty profile-suffix
convention is the dispatcher's contract and the run script has
to match.
3. A user-created `profiles/default/` collides with the reserved
root-profile slot; the reconciler now skips it with a warning
rather than producing two registrations of the same service name.
Action-list ordering is stable: `default` first, then named
profiles in directory order. Boot-log readers can rely on this.
Tests: 8 new dedicated default-slot tests plus updates to every
existing test that asserted against the action list (via the new
`_named_actions` helper that drops the always-present default
entry).
PR #30136 review caught that website/docs/user-guide/docker.md still
said "The dashboard side-process is **not supervised** — if it
crashes, it stays down until the container restarts." That was true
under tini but is the opposite of the s6 behavior this PR ships and
`test_dashboard_restarts_after_crash` proves.
Replace with a description of what users actually see now: automatic
restart by s6-overlay, new PID after a short backoff, logs via
`docker logs`. The standalone-container caveat carries forward
unchanged.
PR #30136 review caught that `hermes gateway stop --all` and
`... restart --all` were broken under s6. The Phase 4 dispatcher was
gated on `not stop_all` (and the symmetric restart_all), so `--all`
fell through to `kill_gateway_processes(all_profiles=True)`. pkill
SIGTERMed every gateway, s6-supervise observed the crashes, and
restarted every gateway ~1s later — net effect: `--all` *kicked*
gateways instead of *stopping* them.
Add `_dispatch_all_via_service_manager_if_s6(action)` that iterates
`mgr.list_profile_gateways()` and routes stop/restart through each
service slot. s6's `want up`/`want down` flips correctly, so a
stop persists. Partial failures are surfaced per-profile with a
running success count; the host pkill path is only reached when s6
isn't in play.
`start --all` isn't a CLI surface — the helper rejects it and
returns False (host code path can take over).
PR #30136 review caught a silent regression: the smoke-test action
overrode ENTRYPOINT to `/opt/hermes/docker/entrypoint.sh`, which the
s6-overlay migration reduced to a shim that just `exec`s the stage2
hook. stage2-hook ignores its CMD args, prints "Setup complete", and
exits 0 — so `hermes --help` and `hermes dashboard --help` never
ran. The #9153 regression guard was a green-always no-op.
Drop the override so the smoke test uses the image's real ENTRYPOINT
chain (`/init` + `main-wrapper.sh`), which is the actual production
startup path. `hermes --help` and `hermes dashboard --help` now run
through the full supervision tree and exercise the real argv routing.
PR #30136 review flagged the s6-overlay install as a supply-chain
regression vs the gosu source it replaced — `tianon/gosu` was
digest-pinned via `FROM ...@sha256:...`, but the three new
ADD/curl downloads had no integrity check at all.
Pin all three tarballs (noarch, symlinks-noarch, per-arch) to
upstream-published SHA256s via ARGs. Verification happens via
`sha256sum -c` against a single checksum file (avoids a piped-shell
hadolint DL4006 warning under dash). To bump S6_OVERLAY_VERSION,
fetch the four `.sha256` files from the new release and update
the ARGs — documented inline.
If upstream artifacts are tampered with mid-build, the build now
fails loudly at the verification step instead of silently
producing a tainted image.
The Dockerfile only ADD'd `s6-overlay-x86_64.tar.xz`, so the
`build-arm64` job in docker-publish.yml — which runs on
`ubuntu-24.04-arm` and publishes by digest — produced an image whose
`/init` couldn't exec on actual arm64 hosts. Apple Silicon and ARM
server users were getting a broken container.
Map BuildKit's `TARGETARCH` (`amd64` / `arm64`) to s6's kernel-arch
naming (`x86_64` / `aarch64`) inside the RUN step and fetch the
correct tarball via `curl` (`ADD`'s URL is evaluated at parse time,
before TARGETARCH substitution, so dynamic arch selection requires
RUN). The noarch + symlinks tarballs are architecture-independent
and stay as ADDs.
The audit case is now explicit: unsupported architectures fail loudly
at build time rather than producing a silently-broken image.
PR #30136 review surfaced two issues, both rooted in the same audit gap:
docker integration tests were running as root, not the unprivileged
`hermes` user (UID 10000) that the runtime actually uses via
`s6-setuidgid hermes`. Anything that probed PID-1 state or wrote to
the s6 control surface worked as root in the tests but was inert in
production.
Fixes:
1. `_s6_running()` previously called `Path("/proc/1/exe").resolve()`,
which is root-only readable. For UID 10000 the symlink yields
PermissionError, `resolve()` silently returns the unresolved path,
and `exe.name == "exe"` — so detection always returned False, the
service-manager runtime-registration path was inert, and every
`hermes profile create` / `hermes -p X gateway start` silently
skipped the s6 hook. Replace with `/proc/1/comm` (world-readable)
+ `/run/s6/basedir` (s6-overlay-specific) — both required, fail
closed.
2. `02-reconcile-profiles` now also chowns `/run/service/.s6-svscan/`
{control,lock} to hermes so `s6-svscanctl -a/-an` works without
root. Previously the directory chown stopped at `/run/service`
and the FIFO inside stayed root-owned, so `register_profile_gateway`
from hermes failed at the rescan-trigger step with EACCES — the
wrapper in profiles.py caught the exception and printed a swallowed
warning, so profile creation appeared to succeed while the slot
was rolled back.
Audit changes to flush this class of bug next time:
- Add `docker_exec` / `docker_exec_sh` helpers to `tests/docker/conftest.py`
that default to `-u hermes`. The module docstring explains why and
flags `user="root"` as opt-in only for tests that explicitly need
root (none currently do).
- Refactor every `docker exec` call in tests/docker/ through the new
helpers (test_dashboard.py, test_zombie_reaping.py, test_profile_gateway.py,
test_container_restart.py, test_s6_profile_gateway_integration.py).
- Add 5 unit tests covering `_s6_running` under various probe states
(both signals present; comm wrong; basedir missing; PermissionError
on /proc/1/comm; missing /proc — non-Linux). The PermissionError
test is the explicit regression guard for the original bug.
Known follow-up: the per-service `supervise/control` FIFO inside each
`/run/service/gateway-<profile>/supervise/` is created root-owned by
s6-supervise (which runs as root because s6-svscan is PID 1). `s6-svc
-u/-d/-t` from the hermes user will get EACCES on those. The audit
under `-u hermes` will reveal this in lifecycle tests — surfacing the
issue cleanly so it can be fixed in a focused follow-up (likely via a
small SUID helper or a polling chown loop in cont-init.d). The
detection + svscanctl fixes here are independent and complete on
their own.
The s6-overlay migration replaced every runtime use of gosu with
s6-setuidgid (in stage2-hook.sh, main-wrapper.sh, per-service run
scripts, and cont-init.d hooks), but the gosu binary itself was still
being copied into the image from tianon/gosu, and several comments
across the repo still pointed to it.
Image changes:
- Drop the FROM tianon/gosu:1.19-trixie AS gosu_source stage
- Drop the COPY --from=gosu_source /gosu /usr/local/bin/ layer
- Net: one fewer base-image pull, ~12-15 MB layer eliminated
Documentation/comment refresh (no behavior change):
- Dockerfile: update root-user rationale comment + cont-init.d comment
- docker/main-wrapper.sh: drop "pre-s6 contract (gosu drop)" reference
- docker-compose.yml: update UID/GID remap comment
- .hadolint.yaml: update DL3002 ignore rationale
- website/docs/user-guide/docker.md: privilege-drop helper is s6-setuidgid now
- hermes_cli/config.py: docker_run_as_host_user docstring
tools/environments/docker.py runs *arbitrary user images* via the
terminal backend, not the bundled Hermes image. It still needs SETUID/
SETGID caps so user images that use gosu/su/s6-setuidgid all work.
Renamed the cap-list constant _GOSU_CAP_ARGS → _PRIVDROP_CAP_ARGS and
updated comments to list s6-setuidgid alongside the others as examples.
The matching test (test_security_args_include_setuid_setgid_for_gosu_drop
→ test_security_args_include_setuid_setgid_for_privdrop) was renamed
and its docstring updated; behavior is unchanged.
Verification:
- hadolint clean against .hadolint.yaml
- shellcheck clean against all docker/ shell scripts
- Image rebuilt successfully (sha 1a090924ccea)
- Docker harness: 19 passed in 41.87s (every Phase 0 test + Phase 4
per-profile-gateway lifecycle + container-restart reconciliation)
- tests/tools/test_docker_environment.py: 23 passed (rename did not
break test discovery; pre-existing unrelated mock warning)
The plan document (docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md)
intentionally retains its historical references to gosu — it describes
the pre-s6 entrypoint as background for understanding the migration.
Phase 5 of the s6-overlay supervision plan. Documentation + small
diagnostic cleanups; no behavior changes.
website/docs/user-guide/docker.md:
- Replace the old 'entrypoint script does the bootstrap' section
with the s6-overlay boot flow (cont-init.d/01-hermes-setup,
cont-init.d/02-reconcile-profiles, static main-hermes + dashboard
services, ENTRYPOINT-as-main-program pattern).
- Add a 'Per-profile gateway supervision' subsection covering the
new lifecycle commands, restart semantics, log persistence, and
'Manager: s6 (container supervisor)' status reporting.
- Add 'Breaking change vs. pre-s6 images' callout naming the
/init ENTRYPOINT and pointing affected wrappers at the pin
workaround.
website/docs/user-guide/profiles.md:
- Add a note under 'Persistent services' pointing container users
at the docker.md section explaining s6 supervision inside the
image. Host-side systemd/launchd documentation is unchanged.
skills/software-development/hermes-s6-container-supervision/SKILL.md:
- New maintainer skill covering the supervision-tree map, file
layout, the Architecture B rationale (cont-init.d args + halt
exit-code propagation), quick recipes, and the 8 pitfalls we hit
while implementing the plan (PATH-without-/command, root-owned
profile dirs, SOUL.md as marker, the '143' anti-pattern, etc.).
hermes_cli/doctor.py:
- _check_gateway_service_linger skips on s6 (the linger concept
doesn't apply inside the container).
- New _check_s6_supervision section reports main-hermes/dashboard
state and per-profile-gateway count (registered vs supervised
up), only inside the s6 container. Host doctor output unchanged.
- External Tools / Docker check no longer emits a 'docker not
found' warning inside the container; prints an explanatory
info line instead. Still respects an explicit TERMINAL_ENV=docker
(in case the user mounted /var/run/docker.sock).
hermes_cli/gateway.py:
- Document _container_systemd_operational more precisely: it's
NOT for our Hermes Docker image (s6-overlay handles that via
detect_service_manager() == 's6'). It still covers
systemd-nspawn / k8s-with-systemd-init cases, so leaving it in
place is correct; the docstring just makes that explicit.
Test harness (verification, no test changes in this commit):
19 passed, 0 xfailed. 66 service-manager / container-boot /
profiles-s6-hooks / gateway-s6-dispatch unit tests still green.
61 doctor tests still green. Hadolint + shellcheck clean.
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Phase 4 of the s6-overlay supervision plan. Activates the Phase 3
S6ServiceManager by hooking it into the profile lifecycle and the
`hermes gateway start/stop/restart` dispatcher, and adds a cont-
init.d-time reconciliation pass that survives `docker restart`.
Task 4.0 — container-boot reconciliation:
/run/service/ is tmpfs, so every `docker restart` wipes every
per-profile gateway slot. /etc/cont-init.d/02-reconcile-profiles
invokes hermes_cli.container_boot.reconcile_profile_gateways() on
every boot, which walks $HERMES_HOME/profiles/<name>/, reads each
gateway_state.json, recreates the s6 service slot, and auto-starts
only those whose last state was 'running'. Other states
(stopped, starting, startup_failed, missing) register the slot
in the down state — avoiding crash-loops across restarts for a
gateway that was broken last boot. Per-profile outcome is recorded
to $HERMES_HOME/logs/container-boot.log.
Implementation: hermes_cli/container_boot.py + 12 unit tests.
Profile-marker is SOUL.md, not config.yaml, because `hermes profile
create` only seeds SOUL.md by default (config.yaml comes from
`hermes setup`).
Task 4.1 / 4.2 — profile create/delete hooks:
hermes_cli/profiles.py::create_profile now calls
_maybe_register_gateway_service(<canon>) at the end, which routes
through ServiceManager.register_profile_gateway when running on s6
and no-ops on host backends. delete_profile mirrors with
_maybe_unregister_gateway_service. _allocate_gateway_port produces
a deterministic SHA-256-derived port in [9200, 9800).
Task 4.3 — gateway dispatch + remove rejection arms:
_dispatch_via_service_manager_if_s6(action) intercepts
start/stop/restart at the top of each subcommand and routes them
through S6ServiceManager.{start,stop,restart}. The pre-Phase-4
`elif is_container():` rejection arms are kept as fallback for
pre-s6 containers / unsupported runtimes, but only ever fire when
detect_service_manager() != 's6'. install/uninstall under s6
print informational guidance pointing users at profile create/delete.
Removed the two xfail(strict=True) markers from
tests/docker/test_profile_gateway.py — both tests now pass strictly.
Task 4.4 — status reporting:
get_gateway_runtime_snapshot() reports
Manager: 's6 (container supervisor)' inside an s6 container instead
of 'docker (foreground)'.
Plan-vs-reality drift fixed in this commit:
- Plan's S6ServiceManager._render_run_script used
`gateway start --foreground --port {port}` — invented args; the
real CLI is `gateway run`. Switched accordingly. port arg
retained for API parity but now documented as 'currently ignored'.
- Plan's reconciler keyed on config.yaml; switched to SOUL.md
(config.yaml is created by hermes setup, not by hermes profile
create, so the original gate caught nothing).
- The plan's _dispatch helper used _profile_arg() which returns
'--profile <name>' (i.e. with the flag prefix). Switched to
_profile_suffix() which returns the bare name.
- Architecture B's docker exec doesn't get /command on PATH or
the venv on PATH; Dockerfile's runtime PATH now includes
/opt/hermes/.venv/bin so 'docker exec <c> hermes ...' works
without sourcing the venv.
- stage2-hook now chowns $HERMES_HOME/profiles to hermes on every
boot, not just on the UID-remap path. Without this, files created
by docker-exec-as-root accumulate and the next reconciler run
fails with PermissionError reading SOUL.md.
Test harness:
19 passed, 0 xfailed (the two pre-Phase-4 xfail targets flip to
passing). 78 unit tests across service_manager + container_boot +
profiles_s6_hooks + gateway_s6_dispatch. Hadolint + shellcheck
pass cleanly.
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Phase 3 of the s6-overlay supervision plan. Implements the runtime-
registration surface from D4 — only the s6 backend supports
register_profile_gateway / unregister_profile_gateway /
list_profile_gateways; host backends continue to raise
NotImplementedError. No caller yet (Phase 4 wires in the profile
create/delete hooks).
Key implementation notes:
- Service directory shape: /run/service/gateway-<profile>/{type,run,log/run}.
Atomic register: write to gateway-<profile>.tmp, fsync via
os.rename. Cleanup on rescan failure.
- Run script uses #!/command/with-contenv sh so HERMES_HOME and any
extra_env arrive at exec time. The hermes -p <profile> gateway
start --foreground --port <port> command is wrapped in
s6-setuidgid hermes for the per-service privilege drop (OQ2-A).
- Log script (OQ8-C): persists via s6-log to
${HERMES_HOME}/logs/gateways/<profile>/. CRITICAL — HERMES_HOME is
a runtime env-var expansion in the rendered script, NOT a Python
f-string substitution. Negative-asserted in
test_s6_register_creates_service_dir_and_triggers_scan so
regressions are caught.
- PATH gotcha: /command/ is only on PATH for processes spawned by
the supervision tree (services, cont-init.d). `docker exec` and
profile-create hooks don't get it. S6ServiceManager calls all
s6-* binaries via absolute path through the new _S6_BIN_DIR
constant so callers don't have to fix up env vars.
- validate_profile_name rejects path-traversal, leading-dash (s6
would parse as a flag), uppercase, whitespace, and names >251
chars (s6-svscan default name_max).
Test coverage:
- 13 new unit tests in tests/hermes_cli/test_service_manager.py
(kind detection, run-script content, env quoting, register
rollback on rescan failure, unregister idempotence, list filter,
lifecycle dispatch, svstat parsing). Total: 36 passing.
- 2 new in-container integration tests in
tests/docker/test_s6_profile_gateway_integration.py validating
end-to-end registration against a real s6 supervision tree.
Docker harness: 14 passed, 2 xfailed (Phase 4 target unchanged).
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
BREAKING CHANGE: the container ENTRYPOINT is now /init (s6-overlay)
instead of /usr/bin/tini. Main hermes runs as the container CMD with
TTY inherited (preserving --tui), dashboard runs as a supervised s6-rc
service (HERMES_DASHBOARD=1 starts it; crashes auto-restart), and the
ground is laid for per-profile gateway supervision (Phase 3+4).
All five pre-s6 docker run invocation patterns continue to work
identically — verified by the Phase 0 docker harness:
docker run <image> → `hermes` with no args
docker run <image> chat -q "..." → `hermes chat -q ...` passthrough
docker run <image> sleep infinity → `sleep infinity` direct
docker run <image> bash → interactive bash
docker run -it <image> --tui → interactive Ink TUI
Phase 2 harness result: 12 passed, 2 xfailed (Phase 4 target). Hadolint
+ shellcheck pass cleanly.
Architecture pivot from plan v3 (documented in main-hermes/run header):
the plan called for main hermes to be an s6-supervised service, but
two real s6-overlay v3 mechanics blocked that — cont-init.d scripts
receive no arguments (CMD args are not visible to stage2-hook), and
`/run/s6/basedir/bin/halt` after writing the exit code did not
propagate the desired exit code (container exits 143). We use the
s6-overlay-native CMD pattern instead: main-wrapper.sh is the
container's main program (ENTRYPOINT prepends it so leading-dash
args like --version aren't intercepted by /init), exec's the final
program with stdin/stdout/stderr inherited, and the program's exit
code becomes the container exit code. main-hermes is now a no-op
`sleep infinity` slot kept for future supervised-gateway-container
modes. This trades "supervised restart of main hermes" for arg-
parity with the pre-s6 contract — main hermes was already unsupervised
under tini, so we lose nothing functional. Dashboard supervision is
the only new guarantee added by this phase.
Files added:
docker/main-wrapper.sh # arg routing + s6-setuidgid drop
docker/stage2-hook.sh # gosu-equivalent + chown + seed
docker/s6-rc.d/main-hermes/{type,run,dependencies.d/base}
docker/s6-rc.d/dashboard/{type,run,dependencies.d/base}
docker/s6-rc.d/user/contents.d/{main-hermes,dashboard}
Files changed:
Dockerfile: tini → s6-overlay install + ENTRYPOINT flip + service wiring
docker/entrypoint.sh: thin shim to stage2-hook.sh for back-compat
tests/docker/test_dashboard.py: add test_dashboard_restarts_after_crash
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Phase 1 of the s6-overlay supervision plan. Pure-refactor addition:
introduces the abstract interface (with runtime_checkable Protocol),
detect_service_manager(), validate_profile_name(), and thin
SystemdServiceManager / LaunchdServiceManager / WindowsServiceManager
wrappers around the existing systemd_* / launchd_* / gateway_windows.*
module-level functions. No host call site was modified — host code
continues to use the existing functions directly; the protocol is for
new backend-agnostic code (Phase 4 profile create/delete hooks and the
Phase 4 s6 dispatch path in 'hermes gateway start/stop/restart').
WindowsServiceManager.install() forwards the v3 kwargs (start_now,
start_on_login, elevated_handoff) added in PRs #28169-adjacent so
non-Windows callers — there aren't any today — can opt in.
The s6 backend lands in Phase 3; until then get_service_manager()
raises a clear error if invoked on a host that detects as 's6'.
Phase 0.5 of the s6-overlay supervision plan. Catches Dockerfile and
shell-script regressions that the behavioral docker-publish smoke test
can't surface — unquoted variable expansions, silently-failing RUN
commands, missing apt-get clean, etc.
Both lint clean against the current (tini) Dockerfile + entrypoint.sh
at the configured thresholds (hadolint: warning, shellcheck: error).
Each ignore in .hadolint.yaml carries a one-line justification; the
shellcheck severity floor is documented in the workflow file.
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Two pre-existing baseline issues found while running the Phase 0 harness
against the tini image that need fixing before later phases can use the
harness as a behavior-parity oracle:
1. The autouse `_enforce_test_timeout` fixture in tests/conftest.py
hard-coded a 30s SIGALRM, which preempted any `pytest.mark.timeout`
marker (already honored by pytest-timeout). Honor the marker if
present; fall back to 30s otherwise. Docker harness tests carry a
180s marker applied at collection time in tests/docker/conftest.py.
2. test_dashboard_port_override polled via `ss -tlnp` / `netstat -tln`
— neither is installed in the Hermes image, so the probe trivially
failed even when the dashboard was bound. The dashboard also takes
8-15s to bind on cold image; the 5s sleep was insufficient. Replace
with a poll loop reading /proc/net/tcp directly (port 9120 = 0x23A0,
state 0A = LISTEN). Bump probe deadline to 60s and switch
test_dashboard_opt_in_starts to a similar poll for pgrep so we don't
regress to the same race.
Result: 11 passed, 2 xfailed (Phase 4 target) on tini image. Harness
now ready to serve as Phase 2's behavior-parity oracle.
The agent-test suite default is 30s; docker test_no_args (the dashboard
spin-up, the container restart) routinely take 60-90s. Without this
they intermittently fail in CI with TimeoutError.
Tasks 0.2-0.6 of the s6-overlay supervision plan. Locks the
user-visible behavior we must preserve through the Phase 2 init-
system swap:
- test_main_invocation.py (Task 0.2): docker run <image> with no
args, chat subcommand passthrough, bare executable passthrough,
bash pattern, exit-code propagation
- test_tui_passthrough.py (Task 0.3): TTY allocation via docker -t
using the host's script(1) for a PTY
- test_dashboard.py (Task 0.4): HERMES_DASHBOARD=1 opt-in,
HERMES_DASHBOARD_PORT override
- test_profile_gateway.py (Task 0.5): per-profile gateway
start/stop and profile-delete-stops-gateway. Both marked
xfail(strict=True) because the current tini image refuses
gateway lifecycle commands inside the container; Phase 4
Task 4.3 flips them to passing.
- test_zombie_reaping.py (Task 0.6): PID 1 reaps orphaned
zombies. tini does this today; s6-overlay's /init must
continue to.
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Task 0.1 of the s6-overlay supervision plan. Establishes the test
infrastructure for tests/docker/: skip-on-missing-Docker collection
hook, session-scoped image-build fixture (overridable via the
HERMES_TEST_IMAGE env var for faster local iteration), and a
container_name fixture that ensures cleanup on test exit.
Refs: docs/plans/2026-05-07-s6-overlay-dynamic-subagent-gateways.md
Replace tini with s6-overlay as PID 1 in the Hermes Docker image so that
main hermes, the dashboard, and dynamically-created per-profile gateways
all run as supervised services. Includes container-boot reconciliation
(Task 4.0) so per-profile gateways survive docker restart.
Plan history:
- v1: 2026-05-07 — original design (subagent gateways scope)
- v2: 2026-05-18 — re-validated, scope narrowed to per-profile gateways,
WindowsServiceManager added to protocol
- v3: 2026-05-21 — re-validated in docker_s6 worktree, install-method
stamp preservation noted in Task 2.3, Task 4.0 added for container
restart survival
12.5 engineering days estimated across 7 phases.
Adds a `TTSProvider(ABC)` + `register_tts_provider()` extension point
to the plugin context API, **alongside** the existing config-driven
`tts.providers.<name>: type: command` registry from PR #17843. This is
additive — the command-provider surface stays as the primary way to
add a TTS backend.
The hook covers cases the shell-template grammar can't reasonably
express:
- Native Python SDKs without a CLI (Cartesia, Fish Audio, etc.)
- Streaming synthesis (chunked Opus → voice-bubble delivery)
- Voice metadata API for the `hermes tools` picker
- OAuth-refreshing auth flows
None of the 10 inline built-in providers (`edge`, `openai`,
`elevenlabs`, `minimax`, `gemini`, `mistral`, `xai`, `piper`,
`kittentts`, `neutts`) are migrated to plugins. They stay inline. The
hook is for *new* engines that aren't built-in.
## Resolution order
The dispatcher's resolution order is the load-bearing invariant:
1. `tts.provider` is a built-in name → built-in dispatch. **Always wins.**
2. `tts.provider` matches `tts.providers.<name>` with `command:` set
→ command-provider dispatch (PR #17843).
3. `tts.provider` matches a plugin-registered `TTSProvider`
→ plugin dispatch (new).
4. No match → falls through to Edge TTS default (legacy behavior).
Built-ins-always-win is enforced at THREE layers:
- Registry: `register_provider()` rejects shadowing names with a warning.
- Dispatcher: `_dispatch_to_plugin_provider()` short-circuits built-in
names defensively before consulting the registry.
- Picker: `_plugin_tts_providers()` filters built-in shadows out of
the `hermes tools` row list defensively.
Command-providers-win-over-plugins is enforced at TWO layers:
- The caller in `text_to_speech_tool` checks
`_resolve_command_provider_config` first.
- `_dispatch_to_plugin_provider` re-checks for a same-name command
config defensively so a refactor of the caller can't silently break
the invariant.
## New files
- `agent/tts_provider.py` — `TTSProvider(ABC)` with `synthesize()` (required),
`list_voices()`, `list_models()`, `get_setup_schema()`, `stream()`,
`voice_compatible` (all optional with sane defaults). Mirrors
`agent/image_gen_provider.py` shape.
- `agent/tts_registry.py` — `register_provider`/`get_provider`/`list_providers`
with `_BUILTIN_NAMES` reject-shadowing invariant. Mirrors
`agent/image_gen_registry.py` shape.
- `plugins/tts/...` directory ready for community plugins (none shipped).
## Modified files
- `hermes_cli/plugins.py` — `register_tts_provider()` method on
`PluginContext`. Matches the gating shape of
`register_image_gen_provider()` / `register_browser_provider()`.
- `tools/tts_tool.py` — `_dispatch_to_plugin_provider()` +
`_plugin_provider_is_voice_compatible()` + walrus-elif wiring into
the main dispatcher. Built-in elif chain untouched.
- `hermes_cli/tools_config.py` — `_plugin_tts_providers()` injects
plugin rows into the Text-to-Speech picker category alongside the
10 hardcoded built-in rows.
## Tests
- `tests/agent/test_tts_registry.py` — 47 tests covering registration,
lookup, ABC contract, helpers, AND a `TestBuiltinSync` regression
test that fails if `agent.tts_registry._BUILTIN_NAMES` drifts from
`tools.tts_tool.BUILTIN_TTS_PROVIDERS` (kept duplicated due to
circular import constraints).
- `tests/tools/test_tts_plugin_dispatch.py` — 35 tests covering
built-in-always-wins, command-wins-over-plugin, plugin dispatch,
exception passthrough, voice_compatible helper.
- `tests/hermes_cli/test_tts_picker.py` — 10 tests covering the
picker surface, builtin shadowing defense, integration with
`_visible_providers`.
- `tests/hermes_cli/test_plugins_tts_registration.py` — 3 end-to-end
tests via `PluginManager.discover_and_load()`.
- `tests/plugins/tts/check_parity_vs_main.py` — 9-scenario subprocess
parity harness vs `origin/main`. The only intentional diff is
`fallback_edge → plugin` for the `plugin-installed` scenario.
## Verification
- 95/95 new tests pass.
- 170/170 pre-existing TTS tests (test_tts_command_providers,
test_tts_max_text_length, test_tts_speed, etc.) pass unchanged.
- Parity harness against `origin/main`: 8 OK + 1 expected DIFF.
- E2E smoke: a registered plugin's `synthesize()` is called via
`text_to_speech_tool` with the standard JSON envelope returned.
- Ruff clean on all touched files.
## Docs
- `website/docs/user-guide/features/tts.md` — new "Python plugin
providers" section with a decision table (command-provider vs
plugin), minimal plugin example, and the optional-hook reference.
- `website/docs/user-guide/features/plugins.md` — TTS row updated to
mention both surfaces (command-provider primary, plugin for
SDK/streaming).
Closes#30398
Two-layer redaction at the persistence boundary so credentials never reach
state.db, session_*.json, or compression:
1. agent/chat_completion_helpers.py :: build_assistant_message
- Redact assistant content before the message dict is constructed
(catches PATs / API keys the model inlines into natural language)
- Redact tool_call.function.arguments at the same site (catches secrets
inlined into tool args, e.g. terminal command=curl -H 'Authorization: ...')
Tool execution uses the raw API response object, not this dict, so
redacting the persisted shape is safe.
2. run_agent.py :: _save_session_log
- Add _redact_message_content() static helper that handles both string
content and OpenAI/Anthropic multimodal list-of-parts (image parts
pass through untouched, only text/content fields are redacted)
- Apply to every message + the cached system prompt before writing
session_*.json
Both layers respect HERMES_REDACT_SECRETS via redact_sensitive_text —
no-op when disabled.
Tests (TestSaveSessionLogRedactsSecrets, 4 cases):
- api key in tool content
- api key in user message
- api key in system prompt
- multimodal list-of-parts (image part preserved, text redacted)
Tests use an autouse fixture to force _REDACT_ENABLED=True because the
hermetic conftest defaults the env var to false.
Salvaged from PR #24758 by @vgocoder (build_assistant_message + session_log)
+ PR #19855 by @liuhao1024 (multimodal list helper, system_prompt redaction).
Kept only the redaction concern from #19855; its unrelated whatsapp npm
timeout + PATCH_SCHEMA changes are out of scope and dropped.
Refs #19798 (PAT leak via assistant inline mention), #19845 (session capture
credential leak).
Co-authored-by: liuhao1024 <liuhao03@bilibili.com>
Co-authored-by: teknium1 <127238744+teknium1@users.noreply.github.com>
The web dashboard's Anthropic OAuth helper wrote the credential file
straight to its final destination and relied on the process umask for
permissions. That left the dashboard-specific path weaker than the
existing auth writers, which already use owner-only permissions and
safer write semantics.
This change keeps the scope narrow: make the dashboard helper write via
a temp file + replace, chmod the final file to owner-only, and add a
focused regression test for both permission handling and atomic-write
behavior.
Constraint: Must preserve the existing dashboard OAuth flow and credential-pool side effects
Rejected: Broader auth-storage refactor | unnecessary scope for a single verified inconsistency
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep dashboard credential writes aligned with existing auth storage semantics; do not reintroduce direct write_text() here without matching chmod/atomic behavior
Tested: pytest -o addopts='' tests/hermes_cli/test_web_server_oauth_write.py tests/hermes_cli/test_web_server.py -q (78 passed)
Not-tested: Cross-platform permission semantics on Windows-managed filesystems
The SETUP_HITS check matched any file ending in setup.py/setup.cfg/
sitecustomize.py/usercustomize.py at any path depth. This produced
false positives on every PR touching hermes_cli/setup.py (the CLI
setup wizard), which is unrelated to pip/site install hooks.
Only the top-level setup.py/setup.cfg execute during 'pip install',
and only top-level sitecustomize.py/usercustomize.py are auto-loaded
by site.py at interpreter startup. Anchor the regex with '^' so only
repo-root matches fire.
Symptom: PR #30916 (Mattermost plugin migration) flagged purely
because it deletes _setup_mattermost() from hermes_cli/setup.py.
Discord migration (#30591) hit the same false positive yesterday.
_write_claude_code_credentials wrote ~/.claude/.credentials.json via
Path.write_text + replace + post-write chmod(0o600). Both the temp file
and the destination briefly inherited the process umask (commonly 0o644
= world-readable) between create/replace and chmod, exposing the OAuth
access/refresh tokens to other local users on multi-user hosts.
Use os.open with O_WRONLY|O_CREAT|O_EXCL and an explicit S_IRUSR|S_IWUSR
mode so the temp file is created atomically at 0o600. After os.replace,
the destination inherits the temp's mode, so the post-write chmod is no
longer needed. The temp name also gains a per-process random suffix to
avoid collisions between concurrent writers and stale leftovers from a
crashed prior write.
Parent dir (~/.claude/) is owned by Claude Code itself and shared with
its native auth, so we deliberately don't tighten its mode here (unlike
the mcp_oauth fix which owns its own subtree under HERMES_HOME).
Mirrors the fix shipped for agent/google_oauth.py in #19673 and the
parallel fix for tools/mcp_oauth.py in #21148.
Adds a regression test in TestWriteClaudeCodeCredentials asserting the
resulting file mode is 0o600 (skipped on Windows where POSIX mode bits
aren't enforced).
The write denylist already protects SSH keys, AWS, GPG, npm, PyPI,
Docker, Azure, and GitHub CLI credentials. Two common credential
stores were missing:
~/.git-credentials stores plaintext git tokens in the format
https://username:token@github.com when using git credential-store.
It is directly analogous to ~/.netrc which was already protected.
~/.config/gcloud/ contains Google Cloud OAuth tokens and service
account credentials. It is directly analogous to ~/.aws/ which
was already protected.
Under prompt injection, an agent could be instructed to overwrite
these files, destroying credentials or planting malicious ones.
Verified before and after with is_write_denied() on both paths.
PR #9020's salvage changed the /resume list footer from
'Use /resume <session id or title> to continue.' to
'Use /resume <number>, /resume <session id>, or /resume <session title> to continue.\n Example: /resume 2'.
test_resume_without_target_lists_recent_sessions still pinned the old
string verbatim and failed in CI. Relax to substring assertions that
allow both the new numbered footer and any future tweaks while still
verifying the hint is shown.
The numbered /resume feature added new i18n keys to en.yaml; the catalog parity
tests require every locale to carry matching keys and placeholders, so add
translations to all 15 supported locales.
Also unblock tests/cli/test_cli_resume_command.py:
- _make_cli stub now sets self.resume_display = 'minimal' since
_handle_resume_command (post-#31695) calls _display_resumed_history.
- mock_db.resolve_resume_session_id returns the input id (no compression
chain) so HERMES_SESSION_ID is set to a real string, not a MagicMock.
The gateway pairing directory (~/.hermes/pairing/) stores per-platform
access-control files (telegram-approved.json, discord-approved.json, etc.).
A prompt-injected agent using write_file could add arbitrary user IDs to an
approved file, granting persistent gateway access without going through the
pairing code flow — the same threat class that motivated protecting
webhook_subscriptions.json (#14157).
The pairing directory was not included in the original control-plane protection
because it postdates PR #14157. PR #30383 introduced the hashed-pending schema
and made the approved files the sole source of truth for gateway access, raising
the security sensitivity of the directory.
Apply the same mcp-tokens pattern: block writes to pairing/ and any path within
it, under both the active hermes_home and the root path (for profile-mode parity
with the fix in #30382).
Regression tests verify denial for pairing/telegram-approved.json,
pairing/discord-pending.json, and the directory itself, in both normal and
profile-mode layouts.
Issue #30768 reports that on native Windows PowerShell the destructive-slash
confirmation modal renders but never registers keypresses, leaving the user
unable to confirm or cancel /reset, /new, /clear, or /undo. The modal works
on macOS, Linux, and WSL; PR #23907 (merged May 11) replaced the
daemon-thread input() pattern with a prompt_toolkit-native keybinding modal
but the win32 input pipeline apparently doesn't dispatch keys to the
filter-conditioned handlers. The modal investigation is ongoing.
This change ships the immediate escape hatch: append `now`, `--yes`, or `-y`
to any destructive slash command to bypass the modal and run the action
immediately. Works on every platform without touching the broken Windows
code path.
/reset now -> reset, no modal
/new --yes my-session -> new session titled "my-session", no modal
/clear -y -> clear, no modal
/undo -y -> undo, no modal
The default behavior (modal prompts when approvals.destructive_slash_confirm
is True) is unchanged for users who don't pass a skip token.
Implementation:
- New classmethod HermesCLI._split_destructive_skip(text) -> (remainder, skip)
parses a destructive-slash command string, strips the leading "/cmd" word
and any recognized skip tokens (case-insensitive exact match, not substring),
and reports whether a skip was requested.
- HermesCLI._confirm_destructive_slash gains an optional cmd_original= arg.
When the arg contains a skip token, it returns "once" immediately —
before the gate check and before any modal rendering.
- The /clear, /new, /undo handlers in process_command pass cmd_original
through. /new additionally uses _split_destructive_skip to strip skip
tokens from the remaining text before deriving the session title, so
"/new now My Session" yields title="My Session" (not "now My Session").
Tests:
- 7 new unit tests in tests/cli/test_destructive_slash_confirm.py covering
the helper (recognized tokens, command-word stripping, case-insensitive
exact match, None/empty input) and the modal bypass (now and --yes both
skip; no-skip-token still consults the modal).
- 3 new integration tests in tests/cli/test_destructive_slash_inline_skip_e2e.py
driving HermesCLI.process_command end-to-end and asserting (a) new_session
is invoked, (b) the modal is never reached, (c) the skip token does not
leak into the session title, and (d) the no-skip-token path still reaches
the modal as a sanity check that we haven't accidentally short-circuited
the normal flow.
All 31 tests across the destructive-slash test surface pass.
Docs:
- website/docs/reference/slash-commands.md documents the new flags both in
the destructive-commands table and the dedicated approval section, with a
link back to issue #30768 explaining why the escape hatch exists.
Board defaults represent persistent project checkouts. Scratch workspaces
are auto-deleted on completion and must stay under the per-board scratch
root that resolve_workspace() creates. Inheriting default_workdir for a
scratch task pointed the cleanup path at the user's source tree — the
data-loss vector documented in #28818.
The containment guard in _cleanup_workspace (just added) is the safety
rail. This commit prevents the bad state from being created in the first
place: only persistent kinds (dir/worktree) inherit board defaults.
Tests updated to cover the new semantics: scratch with default_workdir
set keeps workspace_path=None; dir/worktree still inherits the board
default.
Salvaged from PR #31315 by @leeseoki0 — prevention layer on top of the
#28819 containment fix by @briandevans.
Co-authored-by: teknium1 <127238744+teknium1@users.noreply.github.com>
Copilot review on PR #28819 flagged that `_is_managed_scratch_path` accepted
the entire `<kanban_home>/kanban` subtree as managed scratch storage. With
that, a task whose `workspace_kind='scratch'` and `workspace_path` was
mis-set to `<kanban_home>/kanban`, `.../kanban/logs`, or a board's
metadata directory (e.g. `.../kanban/boards/<slug>` without the
`workspaces/` child) would pass the containment guard and let task
completion `shutil.rmtree` Hermes' own DB, metadata, and log subtrees.
Tighten the guard:
* Allowed roots are now exclusively `workspaces/` directories — the
`HERMES_KANBAN_WORKSPACES_ROOT` override, `<kanban_home>/kanban/workspaces`,
and each `<kanban_home>/kanban/boards/<slug>/workspaces` discovered on
disk.
* Require strict descendancy: a path equal to a root itself is rejected
too, because deleting a workspaces root would wipe every task's scratch
dir at once.
Add a regression test covering the three Copilot-named attack paths
(kanban root, kanban/logs, board root without `workspaces/`) plus the
workspaces-root-itself case, and confirm the inner task-id dir still
matches.
