Commit Graph

7 Commits

Author SHA1 Message Date
Patrick Buckley 110d44b07e refactor(tools): remove man, math, and plan_agent built-in tools
`man` and `math` duplicated capabilities already reachable through
`bash`; `plan_agent` is better expressed as a `task_agent` running a
planning skill, and carried a large amount of special-case machinery
(plan-review gate, refinement loop, per-kind model routing). Removing
all three shrinks the tool surface and cuts per-call token cost.

Also removed, as dead-once-the-tools-are-gone:
- the `math` sandbox executor (`turnstone.core.sandbox`) and its
  `[sandbox]` extra; the eval analyst now runs bash-only
- the read-only `AGENT_TOOLS` sub-agent tool set and the `agent`
  tool-metadata key (`task_agent`/`TASK_AGENT_TOOLS` retained)
- the plan-review protocol end to end: the `on_plan_review` UI hook,
  `resolve_plan`, `POST /v1/api/plan` + `POST /v1/api/route/plan`,
  the `plan_review`/`plan_resolved` SSE events, and their Python SDK /
  TypeScript SDK / OpenAPI / frontend / Discord+Slack bindings
- the `model.plan_alias` / `model.plan_effort` settings and the
  registry `plan_model` / `plan_effort` routing fields

TOOLS 31->28, TASK_AGENT_TOOLS 13->11; COORDINATOR_TOOLS unchanged.

BREAKING CHANGE: removes the `man`, `math`, `plan_agent` tools, the
plan-review SSE/HTTP/SDK surface, and the plan_* model-routing settings
from the experimental 1.6 line.
2026-05-31 19:54:43 -07:00
Patrick Buckley 023606b968 feat(console): event-driven wait_for_workstream + idle cleanup via ChildEventBus
Retire two polling patterns in coord that have clean event sources.
PR 2 of 3 in the coord-completion stack; sits on top of PR #505
(reactive node discovery via PG LISTEN/NOTIFY).

`wait_for_workstream` (coord's block-wait tool) polled storage every
0.5 s in a worker thread regardless of whether anything had changed —
a 600 s wait incurred ~2400 round-trips. Now subscribes to a new
in-process `ChildEventBus` (`turnstone/core/child_event_bus.py`) and
blocks on `threading.Event.wait(min(remaining, WAIT_HEARTBEAT_INTERVAL))`:

- `CoordinatorAdapter` owns the bus; `_dispatch_child_event` calls
  `bus.notify(child_ws_id)` after each `_enqueue_on_ui` for the
  state-class branch (cluster_state, ws_closed, ws_rename,
  intent_verdict, approval_resolved, approve_request).
- Wait loop clears the Event BEFORE the storage snapshot to close
  the subscribe/check race; a notify between clear and the next
  `wait()` leaves the Event set so the loop re-reads without
  losing the wake-up.
- 2 s heartbeat cap preserves the existing `wait_progress` SSE
  cadence for the sidebar UI while cutting SSE traffic ~4x vs the
  pre-bus 500 ms cadence in the quiescent case.
- Worst-case completion latency is 2 s (vs pre-bus 0.5 s) because
  `set_state` buffers non-ERROR writes through `StateWriter`
  (async-flushed) while `emit_state` fans out immediately — a
  bus-driven wake can beat the flusher and read pre-transition
  state, then re-block until heartbeat. Deliberate trade-off; the
  SSE-traffic reduction outweighs the regression on the most
  common terminal transition.
- Defense-in-depth: ownership-filter `cleaned` to own-subtree
  before `register_waiter` so a foreign ws_id passed by an
  untrusted coord LLM (prompt injection) can't observe wake-up
  timing as a side channel. Predicate (`_row_in_own_subtree`)
  requires both `parent_ws_id == coord_ws_id` AND `user_id ==
  coord_user_id` parity — same gate strength as the existing
  `_is_own_subtree` mutating-op guard, so a corrupted /
  cross-tenant `parent_ws_id` alone can't satisfy it. Shared with
  `_snapshot_all` so the snapshot's `denied` shape stays in
  lockstep with the bus filter (Copilot review on #506).

Coord idle-cleanup thread polled the storage scan every
`check_every` seconds (~30 s on default 2 h timeout) even when no
coord was anywhere near idle. Now subscribes to
`SessionManager._state_subscribers` with a `tick_now` event and
blocks on `tick_now.wait(check_every)` — any state change wakes
the sweeper without waiting a full interval, AND the timeout still
fires the periodic sweep for the DB-orphan-only case. A
`min_sweep_interval=5 s` floor bounds DB-call traffic at ~0.2/s
under sustained activity so the loop can't tight-spin `close_idle`
at the rate of its own DB latency (6x improvement over the
pre-refactor fixed 30 s cadence under any activity, and prompt
state-change-driven wakes when below the floor).

`CoordinatorClient` constructor takes `child_event_bus` as a
required kwarg — there's no external SDK shape to preserve and
keeping it optional would silently mask a wiring bug in any future
caller. Tests construct their own `ChildEventBus()` per fixture.

Tests: 16 unit tests for `ChildEventBus` (register / unregister
symmetry, multi-waiter fan-out, multi-child waiter, subscribe/check
race, concurrent register / notify smoke); 7 new adapter tests
(bus notify fires for all 6 state-class events, drops for unknown
child / wrong ws_id); 7 new coord-client wait tests (subscribe-
after-terminal, notify wakes, unrelated notify doesn't wake,
heartbeat fires without notify, unregister on exit, multi-waiter
independence, cross-tenant denial via the user_id-parity filter);
8 idle-cleanup tests (initial sweep, heartbeat cadence, exception
swallowing, stop_event clean exit, state-change wake, subscriber
cleanup, mid-sweep wake, `min_sweep_interval` floor). All pass;
ruff + mypy clean. Full non-live suite: 6227 passed (+2 vs prior
baseline).
2026-05-11 01:06:47 -07:00
Patrick Buckley 38a0d9c3b6 feat(coord): Stage 3 SessionManager Children primitive lift + cluster bus push paths
Lift the Children primitive out of CoordinatorAdapter into universal
SessionManager core primitives, replace the fragile poll + state-event
piggyback paths with first-class cluster bus event types for inline
approval delivery, and clean up the resulting frontend reducer.

Architecture
- New `turnstone/core/children_registry.py` — universal parent → children
  + reverse-lookup primitive with atomic `add_child` (returns parent UI
  for race-free dispatch). Lifted from `CoordinatorAdapter`.
- New `turnstone/core/child_source.py` — `ChildSource` Protocol with
  `SameNodeChildSource` (in-process via SessionManager state observer)
  and `ClusterChildSource` (cross-node via ClusterCollector listener).
- `SessionManager._on_state_change` upgraded to multi-subscriber
  (`subscribe_to_state` / `unsubscribe_from_state`) under a dedicated
  lock; CLI consumer migrated.
- `CoordinatorAdapter` shrunk: 731 → ~640 LOC. Children data lives in
  the registry; fan-out lives in ClusterChildSource. Backward-compat
  property facades dropped; tests updated to use the registry surface.

Cluster bus event vocabulary
- New event types `intent_verdict`, `approval_resolved`,
  `approve_request` flow through both `ClusterCollector._apply_delta`
  (translation from node SSE) and `emit_console_ws_*` (synthesis on
  console pseudo-node).
- `CoordinatorAdapter._dispatch_child_event` re-emits as
  `child_ws_intent_verdict` / `child_ws_approval_resolved` /
  `child_ws_approve_request` on the parent coord's SSE stream.
- New `_broadcast_intent_verdict` / `_broadcast_approval_resolved` /
  `_broadcast_approve_request` no-op hooks on `SessionUIBase`. WebUI
  pushes to the global queue; ConsoleCoordinatorUI pushes to the
  collector. `approve_tools` calls `_broadcast_approve_request` right
  after setting `_pending_approval` so the items reach the coord tree
  immediately, eliminating the bulk-fetch race.

Cleanups
- `pending_approval_detail` piggyback on `ws_state` / `cluster_state`
  removed end-to-end. Bulk fetch + explicit verdict / approve-request
  push are the canonical carriers.
- Browser `_judgePollTick` 90-second poll loop deleted; push path is
  authoritative.
- `urgent` flag on `scheduleLiveFetch` deleted (only caller was 409
  retry; replaced with `invalidateLiveBadge` + standard schedule).
- Console `_fetch_live_block` derives `pending_approval` from a
  disjunction (`activity_state="approval"` OR `state="attention"`
  OR detail present) so the bulk fetch can't return false during the
  state-transition race window.
- Coord-side merge guard in `flushLiveFetches` no longer clobbered:
  `handleChildState` only stamps `sseUpdatedAt` when authoritatively
  clearing detail.
- `child_locality` capability flag removed (was inert dead code).

Reliability
- Selective drop on listener queue overflow: critical event types
  (verdicts, approvals, ws_closed, child_ws_*) evict one oldest item
  to make room rather than dropping themselves on a full queue.
  Best-effort events (state ticks, content tokens, status, activity)
  drop as before. Applied to `SessionUIBase._enqueue`,
  `ClusterCollector._fanout`, and the `WebUI._global_queue` puts in
  the new broadcast hooks.
- `_state_subscribers` snapshot under a dedicated lock so concurrent
  subscribe / unsubscribe during dispatch can't shift the iterator.

UX / a11y
- Loading placeholder in renderChildRow keeps row height stable while
  the bulk fetch is in-flight (sr-friendly aria-label).
- Focus preservation across `_renderChildrenNow` (capture +
  restore by row + marker) and across targeted `_updateChildRow` swaps.
- Layout-shift transition on the approval block max-height; respects
  `prefers-reduced-motion`.
- Sidebar pending count: `(N children · M pending)`.
- Risk pill `aria-label` spells out level + confidence for SR users.
- Per-coord SSE listener queue depth surfaced in the status bar
  (`queue N/500`) with color escalation (warn at >50%, danger at >80%).

Tests
- 305+ test changes across 8 files. New unit tests for
  `ChildrenRegistry`, `ChildSource` (both impls + multi-subscriber
  observer), the new collector emit + apply_delta cases, the dispatch
  cases for new event types, the broadcast hook overrides on both
  WebUI and ConsoleCoordinatorUI, and the focus / placeholder /
  pending-count frontend assertions in `test_coordinator_page.py`.

5024 passed, ruff + mypy clean.
2026-04-30 23:20:14 -07:00
Patrick Buckley 88facd260e feat(coord): pass pending_approval_detail on child_ws_state SSE events
Inline child approve/deny in the coord tree UI was rendering downstream
of the bulk-live cache (``GET /v1/api/cluster/ws/live``), not the SSE
stream. ``child_ws_state`` events were tiny notifications that fired
an urgent live-bulk fetch on every activity_state transition into/out
of "approval", just to pick up the rich ``pending_approval_detail``
payload. With multiple coord tabs and multi-child workstreams, that
urgent-fetch pattern compounded the SSE-executor pressure Shape A
is unwinding.

Thread the field through every layer so the SSE event itself carries
the rich payload — browser mutates ``liveBadgeCache`` directly,
no urgent fetch:

  1. Node ``WebUI._broadcast_state`` emits ``pending_approval_detail``
     on ``ws_state`` events. Gated on ``_pending_approval is not None``
     so the per-broadcast verdict-cache deepcopy only runs when there
     is actually an approval pending. ``_build_node_snapshot`` also
     projects the field so the console's reconnect-via-snapshot
     resync path delivers it (without this the new collector
     forwarding would never see the field on a snapshot row).

  2. Console ``ClusterCollector._apply_delta`` (live ``ws_state``
     forwarding) and ``_reconcile_node`` (snapshot resync diff) both
     forward the field on the emitted ``cluster_state`` event, AND
     ``_apply_delta`` persists it on the cached ``ws`` dict so the
     ``get_node_detail`` / ``get_snapshot`` endpoints between
     reconciliations don't render stale approve/deny buttons.

  3. ``CoordinatorAdapter._dispatch_child_event`` re-emits the field
     on the ``child_ws_state`` event sent to coord listener queues.

  4. Frontend ``handleChildState`` reads ``ev.pending_approval_detail``
     and writes it directly into ``liveBadgeCache``, tagging the
     entry with ``sseUpdatedAt``. ``flushLiveFetches`` honors that
     tag for ``SSE_AUTHORITATIVE_MS`` (3s) — the upstream
     ``/dashboard`` cache has its own ~2s TTL, so a bulk-poll
     landing right after a transition can otherwise clobber the
     fresh SSE-set state with pre-transition data.

The pre-fix ``enteredApproval`` / ``leftApproval`` urgent-fetch
branch is removed. The 409 stale-call_id retry path keeps its own
urgent fetch — that's a different scenario.

Tests cover the forwarding contract at every layer, the broadcast
gate (event includes the field when an approval is pending,
omits it otherwise, and clears after resolution), and the
``flushLiveFetches`` merge-guard structural shape so a refactor
that keeps the symbols but inverts the comparison or drops the
``prev.live`` check can't pass silently.
2026-04-29 19:52:44 -07:00
Patrick Buckley 3abd2c441b feat(console): coord rich ws_state payload + live activity broadcast (#420)
* feat(console): coord rich ws_state payload + live activity broadcast (Stage 2 follow-up)

Pre-lift coord's cluster broadcast was state-only — the dashboard's
coord rows showed the state column flipping but ``tokens`` /
``context_ratio`` / ``activity`` / ``content`` were all hardcoded
to zero / empty. The lift makes coord populate the same per-ws
metric fields interactive does and broadcasts them through the
cluster collector with the rich kwargs.

**Architecture changes:**

- Lift ``on_status`` / ``on_content_token`` / ``on_thinking_start`` /
  ``on_thinking_stop`` / ``on_stream_end`` / ``on_tool_result`` /
  ``on_reasoning_token`` / ``on_tool_output_chunk`` / ``on_info`` /
  ``on_error`` from ``WebUI`` to :class:`SessionUIBase` as base
  implementations. Coord inherits the bodies; the per-ws metric
  fields it had at the base but never populated now flow.
- ``WebUI`` keeps overrides for ``on_status`` / ``on_tool_result`` /
  ``on_error`` to layer Prometheus ``_metrics.record_*`` calls
  on top of ``super()`` (node-only — the console isn't a node).
  ``WebUI._broadcast_state`` now uses the new
  :meth:`SessionUIBase.snapshot_and_consume_state_payload` helper
  for the rich-payload snapshot read.
- ``ConsoleCoordinatorUI`` adds a ``_broadcast_activity`` override
  that calls the new
  :meth:`ClusterCollector.update_console_ws_activity` (in-memory
  pseudo-node row update; named ``update_*`` rather than ``emit_*``
  to flag the no-fanout asymmetry vs. the rest of the
  ``emit_console_ws_*`` family).
- ``coord_adapter.emit_state`` reads ``ws.ui``'s snapshot under
  ``_ws_lock`` and passes the rich kwargs to the extended
  :meth:`ClusterCollector.emit_console_ws_state`. Defensive when
  ``ws.ui is None`` mid-eviction (broadcasts state-only).
- ``coord_endpoint_config`` wires a new ``_coord_spawn_metrics``
  hook so per-spawn ``_ws_messages`` / ``_ws_turn_tool_calls``
  bookkeeping fires on coord too.
- ``_MAX_TURN_CONTENT_CHARS`` moved from ``turnstone.server`` to
  ``turnstone.core.session_ui_base`` so coord enforces the same
  per-turn content cap.

**Three observable behaviour changes** (CHANGELOG-callout-worthy):

- Coord persists ``usage_event`` storage rows on every status
  emission (governance dashboards / token-spend queries gain
  coord visibility).
- Coord broadcasts live activity transitions to the cluster
  collector (dashboard's coord rows show activity ticks between
  state changes the same way interactive does), with last-emitted
  dedup so a tool-heavy turn's repeated ``activity=""`` clears
  don't hammer the collector lock.
- Cluster ``cluster_state`` events for coord rows now carry
  non-zero ``tokens`` / ``content``. Frontend rendering that
  conditionally hid these on coord can drop the branch.

**Tests:** 23 new tests in ``tests/test_coord_rich_ws_state_payload.py``
(per-ws metric writes, snapshot helper drain semantics +
single-lock-acquisition, adapter rich-payload pass-through +
None-UI defensive handling, activity broadcast wire + dedup +
failure swallow + no-op-when-collector-unset, spawn_metrics
hook, concurrent-writes-during-snapshot stress with reader
cycling through running/idle/error so drain branches actually
run, on_stream_end activity-clear pin). Plus WebUI override
regression tests confirming ``_metrics.record_*`` still fires
on top of the lifted bodies. Existing
``tests/test_webui_content.py`` updated to import
``_MAX_TURN_CONTENT_CHARS`` from its new home;
``tests/test_coordinator_adapter.py`` updated to expect the
rich-payload kwargs (default zeros) on
``emit_console_ws_state``. Total: ``4491 → 4514``.
``ruff check`` clean, ``mypy`` clean on touched files.

**/review pipeline** (4 finders → verify → dedupe) caught 14
findings → 12 unique (3 collapsed as duplicates of the lockless
``on_content_token`` writer):

- bug-1 Minor: ``on_status`` regressed coord's defensive
  ``usage.get(...)`` indexing → restored ``.get(..., 0)`` for
  ``prompt_tokens`` / ``completion_tokens`` on both base + WebUI
  override.
- bug-2 Nit: concurrent-snapshot reader only used ``"running"`` →
  cycled through ``("running", "idle", "error")`` so drain
  branches run; also captures + re-raises thread exceptions
  instead of silently passing.
- bug-3 + sec-2 + perf-3 Nit (merged): ``on_content_token``
  mutated ``_ws_turn_content`` lockless while the snapshot drained
  under lock → wrapped the cap-check + append + size-update in
  ``_ws_lock``.
- perf-2 Minor: collector lock contention from per-event activity
  broadcasts → cached last-emitted ``(activity, activity_state)``
  on the UI; subsequent identical ticks return early without
  acquiring the collector lock.
- perf-4 Nit: join-under-lock in snapshot helper → swap-then-join
  pattern (capture list reference under lock, reassign to empty,
  join the captured list outside the lock). Halves the lock
  hold and decouples the join walk from concurrent appenders.
- q-1 Minor: ``emit_console_ws_activity`` was misleading (no
  ``_fanout`` call, unlike the rest of the ``emit_console_ws_*``
  family) → renamed to ``update_console_ws_activity`` + docstring
  call-out for the asymmetry.
- q-2 + q-3 Minor/Nit: stale docstrings on
  ``coordinator_ui.py`` (still claimed "no per-node metrics —
  Phase D") and ``_interactive_spawn_metrics`` (still claimed
  "counters live on WebUI only") → both updated to reflect the
  lifted base class + coord's new hook.
- q-4 Nit: broken Sphinx cross-ref
  ``:meth:\`_snapshot_and_consume_state_payload\``` → dropped
  the leading underscore.
- q-5 Nit: missing ``test_coord_on_stream_end_clears_activity``
  → added.

**Two findings explicitly deferred** (out-of-scope follow-ups,
documented in CHANGELOG):

- perf-1: synchronous ``record_usage_event`` INSERT on coord
  worker thread per status tick. Parity with WebUI is the lift's
  goal; if throughput becomes a concern, batch usage_event writes
  on a background flusher (would apply to both kinds).
- sec-1: coord assistant content now flows on the cluster SSE
  stream, which has no per-user filter today. Pre-existing
  exposure for interactive ``cluster_state`` events; the lift
  extends to coord rows. Proper fix needs SSE auth gating
  (``admin.cluster.inspect``) or per-listener user_id filtering
  — separate security project, doesn't gate this lift.

* fix(console): apply review feedback on PR #420

Three review findings, all confirmed against source:

1. **Copilot — dedup-state-vs-failure race in `_broadcast_activity`**
   (correctness bug): pre-fix ``self._last_broadcast_activity = current``
   was assigned inside the ``_ws_lock`` block BEFORE the collector call.
   If the collector raised mid-broadcast, the exception was swallowed
   but the dedup state was already updated, so subsequent identical
   activity ticks would be deduped and never retried — leaving the
   dashboard's coord row stranded at the pre-failure activity until
   the activity actually changed.

   Fix: move the dedup-state update OUT of the lock and place it AFTER
   a successful collector call. On failure, ``_last_broadcast_activity``
   stays unchanged so the next identical tick retries. Two new
   regression tests pin both the failure-recovery (``test_coord_ui_
   broadcast_activity_failure_does_not_strand_dedup``) and the
   happy-path dedup behavior (``test_coord_ui_broadcast_activity_
   dedup_skips_identical_after_success``).

2. **Copilot — stale `emit_console_ws_activity` reference in
   CHANGELOG**: the method was renamed to ``update_console_ws_activity``
   per /review's q-1 finding before the original commit landed, but the
   CHANGELOG entry was written ahead of the rename. Updated to match
   the actual API + added the no-fanout asymmetry rationale inline so
   readers don't have to chase the method name.

3. **code-quality bot ×2 — `except BaseException` in test workers**:
   the concurrent-snapshot stress test caught thread-worker exceptions
   with ``except BaseException`` (with a noqa to suppress BLE001).
   ``BaseException`` is overkill for a thread worker — ``SystemExit``
   / ``KeyboardInterrupt`` are main-thread signals and ``Exception``
   is the right scope. Narrowed to ``except Exception`` on both
   workers; ``writer_exc`` / ``reader_exc`` types narrowed from
   ``list[BaseException]`` to ``list[Exception]``.

Tests: ``4514 → 4516`` (+2 regression tests for the dedup race fix).
``ruff check`` clean, ``mypy`` clean. No code-path changes outside
the dedup-state placement; the rich-payload broadcast surface is
unchanged.
2026-04-26 17:32:44 -07:00
Patrick Buckley 16916dc257 fix(core,console): coord create-time attachments coordination + Copilot review feedback on PR #416
Coord initial-message + create-time-attachments coordination:

- ``CoordinatorAdapter.send`` gains optional ``attachments`` + ``send_id``
  kwargs so the worker dispatched at create time can carry the uploaded
  files onto the first turn. Mirrors interactive's pre-existing
  worker-thread pattern. The ``send_id`` reservation token soft-locks
  the rows; the adapter's failure path unreserves so a worker crash
  returns them to pending.
- ``_coord_create_post_install`` reserves any uploaded ``attachment_ids``
  via the lifted ``reserve_and_resolve_attachments`` helper before
  dispatching through the adapter — closes the parity gap with
  interactive's create-with-attachments+initial_message flow.
- ``_reserve_and_resolve_attachments`` lifted from ``turnstone/server.py``
  to ``turnstone/core/attachments.py`` as ``reserve_and_resolve_attachments``
  so both processes use one kind-agnostic implementation.

Copilot review fixes on PR #416:

- Skill lookup now calls ``storage.get_prompt_template_by_name`` directly
  rather than going through ``turnstone.core.memory.get_skill_by_name``;
  that helper swallows storage exceptions into ``None`` which would have
  masked outages as the 400 "Skill not found" branch. Calling storage
  directly lets exceptions bubble to the lifted body's correlation_id'd
  500 path so operators chasing skill-related reports can distinguish
  real misses from registry outages.
- ``_interactive_create_build_kwargs`` /
  ``_coord_create_build_kwargs`` thread ``skill_data["name"]`` (the
  canonical row name) into ``mgr.create`` instead of the raw
  ``body["skill"]`` value. Pre-fix a whitespace-padded request body
  ``"skill": "  my-skill "`` would have persisted the dirty name even
  though the lookup ran on the stripped key.
- ``make_create_handler`` docstring corrected: audit-emit failures
  return 200 (not 201).
- ``_audit_workstream_created`` docstring corrected: factory keeps the
  successful 200 response on audit-emit failure (was 201).

New regression test:
``test_create_with_multipart_attachments_and_initial_message_reserves``
asserts attachments are reserved (not pending) when both
``initial_message`` and uploads land in the same coord create request.
Updated ``_SendSession`` stub in ``test_coordinator_adapter.py`` to
match the new ``send`` / ``queue_message`` signatures.

4501 tests passing; ruff + mypy clean.
2026-04-26 04:07:39 -07:00
Patrick Buckley c837e3fa6d feat(core): Stage 1 SessionManager unification (#408)
* feat(core): scaffold SessionManager + SessionKindAdapter Protocol

Stage 1 step 1 — pure addition, no production wiring. Defines the
shape later steps will port the shared mechanics onto: slot
accounting, per-ws-id refcounted rehydrate locks, kind-agnostic
lifecycle; kind-specific event transport + session construction on
the adapter.

Pruned from the earlier Protocol draft (see design brief): per-kind
permission_scope (static handler map is simpler), allows_child_spawn /
quota_policy (deleted in #403), on_child_spawned (coordinator tool
owns children registry), allows_active_focus / active_id / switch
(frontend owns the active-tab state).

* feat(core): port shared session-lifecycle mechanics onto SessionManager

Stage 1 step 2. Adds create / open / close / set_state / close_idle /
get / list_all / count on top of the Step 1 scaffolding. Pure
addition — still no production wiring; the new class doesn't replace
any call sites yet.

Concurrency shape is ported from CoordinatorManager (the more-
complete side): single-phase slot reservation under the manager
lock, per-ws refcounted open-lock to serialize concurrent lazy
rehydrate, placeholder workstreams count toward max_active but can't
evict each other. WSM's two-phase eviction outside the lock is not
carried over; it had a window where a burst of creates could silently
exceed max_active.

Deletions (vs. the union of the two old managers):
- "refuse to close last workstream" guard — handled by the
  dashboard; only existed to protect the now-deleted default startup
  workstream.
- active_id / switch / get_active — frontend owns focus; server-side
  duplicate state is gone.
- _active_coords presence cache — defer measurement to Step 4; if it
  pays for itself at realistic cluster sizes, the CoordinatorAdapter
  can maintain it by observing emit_* calls.
- Children registry + reverse index — coordinator tool owns this,
  manager stays kind-agnostic.

Skill resolution (name → template_id + applied_version) is now
shared via SessionManager._resolve_skill, so WSM's pre-resolve-at-
callsite pattern and CM's internal-lookup pattern converge. Callers
pass the skill name; the manager does the lookup once.

26 smoke tests cover create eviction + overflow, concurrent-create
cap, persist/session rollback, open for missing/deleted/wrong-
kind/wrong-user rows, concurrent-open serialization, close unblocks
UI + emits closed, set_state + storage + adapter observer,
close_idle, list_all ordering, count, eviction fires adapter
transport, node_id passthrough.

* feat(core): add InteractiveAdapter for SessionManager

Stage 1 step 3. Adapter that bridges SessionManager to the node's
interactive transport:

- emit_created/state/closed → pushes onto the process-wide SSE
  global_queue (same shape current server.py handlers produce inline)
- cleanup_ui → ports WorkstreamManager._cleanup_ui body: unblock
  _approval_event / _plan_event / _fg_event, broadcast ws_closed to
  per-UI listener queues (with full-queue fallback), cancel + close
  the session
- build_ui/build_session → delegate to injected factories
  (ui_factory builds WebUI, session_factory is the existing closure
  from server.py with judge_model + memory_config captures)

Also extends SessionKindAdapter.build_session with **extra passthrough
so interactive callers can pass judge_model per-call without polluting
the manager API; and adds a reason= kwarg to emit_closed so the
frontend's "evicted" special-case keeps working (frontend doesn't
differentiate "idle" from "closed", so close_idle collapses into
close()).

14 new adapter tests cover wire payload shape, queue.Full tolerance,
cleanup_ui event unblocking + listener broadcast + queue-full
fallback, session cancel+close, graceful handling of stub UIs / None
session, and kwarg passthrough to the session factory.

* feat(console): add CoordinatorAdapter for SessionManager

Stage 1 step 4. Coordinator-side SessionKindAdapter implementation:

- emit_created/state/closed → delegate to the existing
  ClusterCollector.emit_console_ws_* methods (same wire shape the old
  CoordinatorManager emitted inline)
- cleanup_ui → ports the listener-queue + approval/plan event
  unblocks from CoordinatorManager._cleanup, with queue-full
  fallback so an unresponsive browser tab can't wedge close
- build_ui/build_session → delegate to injected factories; session
  factory doesn't accept client_type so we strip it at the adapter
  boundary

Collector emission exceptions are swallowed (same policy as today's
inline fan-out — dashboard lag on one tick is preferable to breaking
the lifecycle path).

Intentionally out of scope: the children registry (_children /
_child_to_coord) stays in the coordinator tool when wired in Step 5;
the _active_coords lock-free presence cache is deferred pending a
measurement at realistic cluster sizes. 10 new tests cover transport
payloads, collector-exception tolerance, cleanup_ui event unblock +
listener broadcast + queue-full eviction, construction passthrough.

* feat(server): wire interactive server.py to SessionManager

Stage 1 step 5a. Production-path swap: WorkstreamManager →
SessionManager(InteractiveAdapter(...)).

- Construction at server startup: build the adapter with the
  process-wide global_queue, a WebUI ui_factory closure, and the
  existing session_factory. SessionManager gets storage + max_active.
- Default startup workstream wiring removed (the CLI-REPL leftover
  flagged in the handoff's "Convergence is also a pruning
  opportunity" section). --resume now lazily creates a workstream
  scoped to the resumed content; no workstream at all if --resume
  isn't given. The dashboard handles the 0-ws state.
- HTTP handler mgr.create() calls switched to the new kw-only
  signature (user_id, name, model, skill, ws_id, client_type,
  judge_model, parent_ws_id). ui_factory/skill_id/skill_version/kind
  no longer threaded through — adapter handles UI construction and
  manager resolves skill internally.
- Dropped the mgr.last_evicted block in the /new handler (adapter
  emits ws_closed:evicted automatically on capacity eviction).
- mgr.max_workstreams → mgr.max_active.
- Added active_id / switch / switch_by_index / get_active / index_of
  / eviction_count to SessionManager because turnstone/cli.py uses
  them extensively; the handoff's "delete unless there's a live
  caller" rule flips here — CLI is a live caller.

Test fixtures across 9 files updated to build SessionManager +
InteractiveAdapter rather than WorkstreamManager. test_workstream.py
stays unchanged (it tests WSM directly; it'll be deleted in step 5d
alongside the class itself).

Full pytest: 4528 passed. Ruff + mypy clean. Next: 5b (console-side
wiring, with the children-registry relocation to the coordinator
tool).

* feat(console): wire console server to SessionManager

Stage 1 step 5b. Production-path swap: CoordinatorManager →
SessionManager(CoordinatorAdapter(...)).

- CoordinatorAdapter now owns the coord-specific bits that were bolted
  onto the old CoordinatorManager: the children registry (forward +
  reverse index), the lock-free active-coords presence cache, the
  cluster-event fan-out thread, and the worker-dispatch path
  (send / _spawn_worker). The shared SessionManager stays kind-agnostic.
- Added CoordinatorAdapter.attach(mgr) for late-binding the owning
  manager (the manager's ctor takes the adapter, so the dependency has
  to break here). Used inside _rebuild_children_registry for the tenant-
  filtered SQL query, inside send/dispatch for mgr.get(ws_id), and
  inside the fan-out seed path for mgr.list_all().
- emit_created now seeds the children registry + active-coords slot AND
  calls _rebuild_children_registry (covers both create — empty query —
  and open/rehydrate, where the subtree is persisted). emit_closed
  drops both entries. Collapses the three old call-sites in
  CoordinatorManager's create/open/close into one per-event hook.
- Console server.py builds the manager via:
      coord_adapter = CoordinatorAdapter(collector=..., ...)
      coord_mgr = SessionManager(coord_adapter, storage=..., max_active=...,
                                 node_id=ClusterCollector.CONSOLE_PSEUDO_NODE_ID)
      coord_adapter.attach(coord_mgr)
      ConsoleCoordinatorUI._coord_mgr = coord_mgr
      app.state.coord_adapter = coord_adapter
- HTTP handler call-site updates:
  - coord_mgr.create drops initial_message; the handler now calls
    coord_adapter.send(ws.id, initial_message) after create so the
    worker spawn stays out of the shared manager.
  - coord_mgr.open_admin(ws_id) → coord_mgr.open(ws_id, user_id="",
    admin=True). Matches SessionManager.open's unified signature.
  - coord_mgr.list_for_user(uid) inlined as a list comp on list_all()
    (SessionManager doesn't expose the filter; two callers).
  - coord_mgr.children_snapshot / send → coord_adapter.*.
  - coord_mgr.cancel stays (now lives on SessionManager from 5a).
- ConsoleCoordinatorUI.on_state_change now flows state transitions
  through ConsoleCoordinatorUI._coord_mgr.set_state, mirroring the
  WebUI pattern. The old _on_state_observer / _on_rename_observer
  closures the manager used to install are dead code now; leaving the
  fields in place for 5d cleanup.
- Lifespan shutdown calls coord_adapter.shutdown() (was coord_mgr.
  shutdown()) and resets ConsoleCoordinatorUI._coord_mgr on teardown.

Test fixture updates in _coord_test_helpers, test_coordinator_end_to_end,
test_coordinator_endpoints, test_phase6_endpoints: build SessionManager
+ CoordinatorAdapter in _build_mgr, set app.state.coord_adapter, switch
mgr.register_children / mgr.children_snapshot tests to mgr._adapter.*,
and rewrite test_open_admin_uses_open_admin to assert the unified
open(user_id="", admin=True) call shape.

Full pytest: 4486 passed. Ruff + mypy clean. Next: 5d (remove
CoordinatorManager + WorkstreamManager class bodies and their test
files).

* feat(core): delete WorkstreamManager + CoordinatorManager classes

Stage 1 step 5c + 5d. Final step of the unification — the legacy
classes and their test files go away now that every production
caller has been ported.

- Delete turnstone/console/coordinator.py entirely (CoordinatorManager
  class + the _enqueue_on_ui helper, which CoordinatorAdapter now hosts
  its own copy of).
- Trim turnstone/core/workstream.py to just the Workstream dataclass +
  WorkstreamKind + WorkstreamState. ~385 lines of WorkstreamManager
  logic gone; the remaining shape is pure data types shared by both
  managers.
- Delete tests/test_workstream.py (WSM-specific) and
  tests/test_coordinator_manager.py (CM-specific).
- Wire turnstone/cli.py to SessionManager + InteractiveAdapter, same
  pattern as turnstone/server.py. The CLI's WorkstreamTerminalUI uses
  manager.set_state + manager.active_id — both preserved on
  SessionManager (CLI is a live caller that keeps the focus API
  honest, per the handoff's "delete unless it pulls its weight" rule).
- Add an optional manager-level ``_on_state_change`` observer hook
  restored for the CLI's background-attention notification (the web
  path uses the adapter's emit_state; this hook covers callers that
  don't consume SSE).
- Drop dead ``_on_state_observer`` / ``_on_rename_observer`` fields
  from ConsoleCoordinatorUI — the old CoordinatorManager installed
  them; SessionManager/CoordinatorAdapter handle fan-out directly.

Vulture @ 80% confidence: zero unused symbols across the new
SessionManager + adapter files. Ruff + mypy clean (170 files).
Full pytest (excluding tests/live): 4414 passed.

Net across the whole Stage 1 branch: one unified SessionManager +
adapter Protocol replaces two ~500-line parallel managers + a
~600-line CoordinatorManager, and the interactive + coordinator
transports stay cleanly separated at the adapter boundary.

* refactor(auth): drop workstream row-level ownership gates

Turnstone is a trusted-team tool (per #400). user_id stays as
metadata for audit + display; it no longer rejects requests. Scope-
level auth via admin.workstreams / admin.coordinator tokens is the
only gate now.

Solves sec-1 (cross-tenant delete via collision on caller-supplied
ws_id, because the gate was half-implemented) and sec-2 (blank-sub
JWT bypass on empty-owner rows). Net: 359 lines of defensive
empty-string comparisons and admin=True bypass plumbing deleted.

* fix(core): serialize set_state vs close + worker spawn

Three concurrency fixes from the multi-stage review:

- bug-3: set_state now looks up ws under self._lock and gates its
  storage write on ws._closed (a new tombstone flag). close() sets
  ws._closed=True and does its storage write under ws._lock. A
  set_state that acquires ws._lock after close sees the tombstone
  and skips its write instead of resurrecting the closed row.

- bug-1: _spawn_worker wraps the check-and-spawn in ws._lock so two
  concurrent send() HTTP requests can't both observe "no live worker"
  and start duplicate worker threads on the same ChatSession.

- bug-2: replaces Thread.is_alive() as the reuse gate with an
  explicit ws._worker_running flag. The flag is set before the worker
  thread starts and cleared in its finally block — both under
  ws._lock. Using is_alive() left a narrow window where the worker
  could exit between the check and a queue_message call, stranding
  the user's message with no consumer.

perf-2 (lock-held-across-DB-write) is accepted as-is: per-ws
serialization of state transitions behind a DB round-trip is real
cost but bounded — a given ws's state flips happen sequentially on
its worker thread anyway. Dropping ws._lock around the DB write
would reintroduce the bug-3 race.

Full pytest: 4401 passed. Ruff + mypy clean.

* refactor(core): drop _resolve_skill from SessionManager

Skill resolution (name → template_id + applied_version) moves out of
the shared manager and back to the HTTP handlers that own the
create request. The interactive handler already resolved skill_data
+ applied_skill_version for other purposes (model override, judge
config, post-create session seed) and was passing the name to
SessionManager which then redundantly re-resolved via
get_skill_by_name + count_skill_versions — two wasted DB round-trips
per create on a user-visible latency path.

- SessionManager.create: accepts skill_id + skill_version as
  already-resolved kwargs; _resolve_skill helper deleted.
- turnstone/server.py create_workstream: passes the skill_id /
  applied_skill_version it already computed.
- turnstone/console/server.py coordinator_create: pre-resolves
  inline (parity with interactive) before calling coord_mgr.create.

Fixes perf-1 (redundant skill queries per create), q-4 (divergent
skill-version computation between manager and handler), q-5
(coordinator-specific lookup on the shared manager surface).

Full pytest: 4401 passed. Ruff + mypy clean.

* refactor(adapters): extract shared cleanup_ui + drop dead child-registry methods

Both InteractiveAdapter.cleanup_ui and CoordinatorAdapter.cleanup_ui
(plus their _broadcast_ws_closed_to_listeners helpers) were byte-identical.
Pull them into turnstone/core/adapters/_ui_cleanup.py:cleanup_session_ui
so the two adapters delegate to one implementation.

Also drop CoordinatorAdapter.register_children (only test callers — now
use _seed_children in tests/_coord_test_helpers.py) and _add_child
(zero callers anywhere).

* refactor(adapters): symmetric attach() + fail-loud on unattached manager

Add InteractiveAdapter.attach(manager) + .manager property mirroring
the coord-side pattern. CLI (cli.py) now uses cli_adapter.attach(manager)
instead of the _mgr_ref list-ref late-binding hack; server.py picks up
the same call for consistency.

CoordinatorAdapter.send / _rebuild_children_registry /
_prime_children_from_snapshot no longer silently return when
self._manager is None — raise RuntimeError so a forgotten attach() at
startup fails loud instead of dropping the whole fan-out.

* docs: replace stale WorkstreamManager / CoordinatorManager references

Both classes were deleted in 965e0b6; prose docstrings across the
codebase still named them. Update to SessionManager (or describe the
collapsed-into-one-class architecture where the distinction matters).

Leaves the 'Ported from …' historical markers in session_manager.py /
coordinator_adapter.py / interactive_adapter.py intact — those are
deliberate pointers back to the pre-unification code.

* fix(core): atomic close_if_idle + batch pop under one lock

bug-5: SessionManager.close_idle re-checked ws.state == IDLE outside
the lock, so a pending tool result could flip state IDLE→RUNNING
between the snapshot and close() acquiring self._lock. Add
_close_if_idle_locked that tests state + pops under self._lock.

perf-5: drop the per-victim self._lock acquisition; collect + pop the
whole batch in one acquisition, then run cleanup_ui / storage write /
emit_closed outside the lock.

* perf(coord): split emit_created / emit_rehydrated to skip storage query on fresh creates

CoordinatorAdapter.emit_created was unconditionally calling
_rebuild_children_registry (storage.list_workstreams with
parent_ws_id=... limit=10001) on every create, even for fresh-create
paths that provably have zero children.

Add emit_rehydrated to the SessionKindAdapter Protocol. SessionManager
.create still calls emit_created; .open (lazy rehydrate) now calls
emit_rehydrated. CoordinatorAdapter.emit_created seeds the registry +
fan-out but skips the rebuild; emit_rehydrated seeds + rebuilds + fans
out. InteractiveAdapter.emit_rehydrated delegates to emit_created (no
children-registry on the interactive transport).

* perf(coord): fold _active_coords into _children_lock + mutate payload in place

perf-4: _active_coords used a copy-on-write dict-swap pattern so the
fan-out dispatch could read it lock-free, but _dispatch_child_event
already re-validates the parent under _children_lock anyway — the
lock-free snapshot was premature. Replace with a plain dict read+write
both under _children_lock; install and remove collapse to one-liners.
Value also drops the user_id half — dead after a46dab1 removed
row-level ownership gates — so _active_coords is now just
coord_ws_id → ui.

perf-6: _enqueue_on_ui was doing {**payload, "ws_id": coord_ws_id} on
every dispatch. The dispatch path owns payload and doesn't reuse it —
mutate in place.

* test(coord): add adapter tests for worker dispatch + children registry + fan-out

Fills the coverage gap on CoordinatorAdapter — the review (q-3) flagged the
coord-specific concurrency paths ported from the deleted CoordinatorManager
as untested. Three new test classes:

- TestCoordinatorAdapterWorkerDispatch: _spawn_worker reuse gate, queue.Full
  backpressure, concurrent-call bug-1 reproducer (two threads → exactly one
  worker via ws._lock + _worker_running), finally-clears-flag.
- TestCoordinatorAdapterChildrenRegistry: registry seed on emit_created vs
  emit_rehydrated rebuild, _pop_coord_registry_locked reverse-index cleanup,
  _merge_child_ids_locked idempotency, _prime_children_from_snapshot merge.
- TestCoordinatorAdapterDispatchChildEvent: unknown-parent drop, ws_created
  fan-out, cluster_state / ws_closed reverse-index routing, perf-6 in-place
  ws_id stamp.

* fix: regressions flagged by ultrareview

Verify stage of the cloud review surfaced 6 confirmed regressions
from Stage 1's adapter layer. Fixing together since they share the
same root cause (plumbing moved into adapters without retiring the
old emission paths).

- Interactive adapter emit_created / emit_state / emit_rehydrated
  become no-ops. The create_workstream HTTP handler still fires
  ws_created (after attachment validation, per the pre-Stage-1
  "no phantom events on rejected upload" contract); WebUI
  _broadcast_state still fires ws_state with the full payload
  (tokens + context_ratio + activity). Firing from the adapter too
  was duplicating both events. Also closes the phantom-ws-created
  regression (adapter fired before attachment validation ran).

- emit_closed Protocol gains a ``name`` kwarg; the adapter is the
  sole emitter for ws_closed on interactive now, and the frontend
  eviction toast needs the name. Manager passes ws.name from
  close() / create()+open() eviction / close_idle paths.

- _idle_cleanup_thread stops firing its own reason="idle" ws_closed
  — close_idle already fires via the adapter with reason="closed",
  and the frontend never differentiated the two anyway.

- close_workstream_endpoint fix: "Cannot close last workstream" 400
  was a stale error (the guard went away with the default-startup
  workstream). Return 404 on close() == False (which now means the
  ws was already closed or unknown). Also switches the audit actor
  from _require_ws_access's stored owner to _auth_user_id — the
  stored owner is metadata post-#400, so attributing actions to it
  misrepresents who actually did them.

- CLI /ws close mirrors the same stale-error fix.

- SessionManager.close now calls storage.delete_workstream_override
  alongside update_workstream_state, same as the old
  WorkstreamManager.close did. Without it overrides leak until
  tombstone cleanup. close_idle does the same.

- SessionManager._reserve_and_install_locked records the eviction
  on turnstone.core.metrics so the global eviction counter keeps
  working. Old WSM did this inline; the unification dropped it.

- ConsoleCoordinatorUI.on_rename now fans out to the cluster
  collector via a new class attribute ``_collector`` (set at
  console startup alongside ``_coord_mgr``). The old
  ``_on_rename_observer`` plumbing went away with
  CoordinatorManager and the "adapter emit_console_ws_rename runs
  from whichever code path renames" comment was aspirational —
  nothing actually did it.

Full pytest: 4375 passed (tests/live + test_server_live.py excluded;
both pre-existing live-backend failures unrelated to this branch).
Ruff + mypy clean.

* refactor(ui): extract SessionUIBase for shared UI scaffolding

Direct response to review feedback that the unification wasn't
merging enough of the two workstream kinds. WebUI (node) and
ConsoleCoordinatorUI (console) both:

- Keep a per-UI list of SSE listener queues guarded by a lock
- Block a worker thread on _approval_event / _plan_event
- Fan enqueued events out with the same ws_id-stamping pattern
- Resolve approvals / plans with the same broadcast-then-signal
  pattern

All of that now lives once in turnstone/core/session_ui_base.py.
Both UIs subclass SessionUIBase; kind-specific bodies (WebUI's
per-UI metrics + _broadcast_state + intent-verdict bookkeeping,
ConsoleCoordinatorUI's collector fan-out) stay in the subclasses.

WebUI.resolve_approval still overrides the base (it adds intent-
verdict updates) but now calls super() for the shared broadcast +
event-set steps. Same shape as the other approval/plan hooks:
subclasses extend, base provides skeleton.

Net file-level: +156 LOC for the base, -144 LOC across the two
subclasses. The raw number is unexciting — but there's now a
single source of truth for the listener + blocking-gate machinery,
and bugs (like the duplicate ws_created / ws_state events that
prompted this refactor) can't arise from the two implementations
drifting.

Full pytest: 4375 passed. Ruff + mypy clean.

* refactor(ui): move metrics + verdict bookkeeping into SessionUIBase

Second pass at unifying the two UIs. Per-workstream metrics
accumulators (token counts, tool-call counts, context ratio,
activity tracking), intent-judge verdict cache + pending-decision
list, and the verdict-persistence path all move to SessionUIBase.

Before: WebUI tracked all of it; ConsoleCoordinatorUI tracked none
of it (a comment on the old on_intent_verdict literally admitted
the deferral — "skip the persistence + late-decision plumbing that
WebUI does"). Coord sessions never got verdict rows in storage, never
had a user_decision stamped, and the dashboard had no way to show
coord token usage because the data wasn't captured.

Now the base class captures the data and persists the rows for
every kind. Kind-specific broadcast (WebUI's _broadcast_state with
rich per-UI payloads) stays on WebUI; prometheus counters on the
node (_metrics.record_judge_verdict) stay on WebUI's on_intent_verdict
override. Everything else shared.

Behaviour change worth flagging: coord sessions now write
intent_verdicts and output_assessments rows for every judge call
and every output-guard warning. Previously silent; the storage rows
now exist and any future coord-dashboard surface can read them.

Shape of the unification:
- resolve_approval: was overridden on WebUI (intent-verdict decision
  propagation); now lives on the base. Both kinds inherit unchanged.
- on_intent_verdict: WebUI overrides only to add _metrics.record_*;
  rest of the body is the base.
- on_output_warning: was on both separately; fully base-shared now.

Full pytest: 4375 passed. Ruff + mypy clean.

* fix: regressions flagged by second-pass review

Three confirmed findings with direct fixes + a dedicated test file
for SessionUIBase (was previously uncovered).

bug-1 — Coord approve_tools didn't reset _last_verdict_decision or
clear _llm_verdicts between approval rounds. WebUI did (inline).
Coord inherited SessionUIBase.on_intent_verdict which stamps via
the decision flag, so after the first resolve every subsequent
round's verdicts were stamped with the prior round's user_decision
before the user had decided the new round.

Fix: add SessionUIBase._reset_approval_cycle() clearing both under
_ws_lock; call from the top of both subclass approve_tools methods.
Single-source invariant — can't drift again.

sec-1, sec-2 — delete_workstream_endpoint and open_workstream's
rehydrate path recorded the audit row under the stored ws.user_id
("owner_uid") rather than the authenticated caller. With row-level
ownership gating gone (a46dab1), any team member acting on a peer's
workstream produced an audit row naming the victim as the actor.
Fix: pass _auth_user_id(request) as the audit actor, matching the
pattern close_workstream already follows.

q-2 — SessionUIBase had no direct tests. The new
tests/test_session_ui_base.py covers listener fan-out, approval +
plan blocking gates, intent-verdict cache + FIFO eviction, verdict
persistence paths, output-guard persistence, the reset-between-rounds
invariant (bug-1 regression test), a cross-subclass test that
verifies BOTH WebUI.approve_tools and ConsoleCoordinatorUI.approve_tools
call _reset_approval_cycle (verified it fails without the fix), and
a concurrent enqueue/register smoke.

Full pytest: 4395 passed (+20 new). Ruff + mypy clean.

* fix: PR #408 review findings from copilot + code-quality

Three substantive fixes + mechanical side-effect-in-assert cleanup.

Copilot findings:

- session_ui_base.py: on_intent_verdict had a race with
  resolve_approval. Previously acquired _ws_lock twice (read decision
  → release → if unset, acquire again to append). resolve_approval
  could interleave between the two acquisitions, swap-and-clear the
  pending list and set the decision — our verdict then got appended
  to the fresh (empty) list and stamped with the NEXT round's
  decision on the following resolve. Fix: decision-check + append
  under ONE acquisition; storage UPDATE (if decision already set)
  runs outside the lock. New regression test counts lock
  acquisitions during on_intent_verdict and fails if the two-phase
  pattern returns.

- server.py close_workstream_endpoint: comment said "treat as
  already-closed success" but handler returned 404. Comment
  rewritten to match the 404 behaviour ("the ws isn't tracked here"
  is the only reachable meaning for close() → False now).

- test_session_ui_base.py concurrency smoke: the test ended with
  ``pytest.assume = lambda ...`` — a leftover that mutates pytest
  globals and can surprise other tests. Replaced with explicit
  ``not is_alive()`` assertions so the "threads completed cleanly"
  intent survives -O optimization stripping.

Code-quality (assert side-effects):

Six ``assert mgr.open(...)`` / ``assert mgr.close(...)`` in
test_session_manager.py stripped under ``python -O``. Mechanical
fix: extract to local before asserting.

Ignored the two "Protocol method body is `...`" flags — that's the
standard Protocol idiom; replacing with ``pass`` or
``NotImplementedError`` changes typing semantics.

Full pytest: 4396 passed.
2026-04-24 14:28:51 -07:00