`isInheritedSeq` had no production caller — only its own tests — so it was
a public core export shaped by nothing. A bracket owner reads the boundary
positionally; the helper belongs with the compaction seam, where a real
consumer decides its signature.
Also condense the `session/inherited` and `lastActivityTime` docs.
A plugin owning a standalone open/close bracket cannot tell a dead marker
from a live one: an unmatched `compact/start` reads identically whether the
previous writer died mid-compaction or a compaction is running now.
`Session.firstLiveSeq` already holds that answer exactly, but only in memory.
Append the log-only `session/inherited` event at that seq from the seeded
constructor — the single waist all six seeded-start paths pass through
(resume, configured startup on a persisted id, `sessions.fork()`, a subagent
fork child, `adopt()`'s live prefix, and a bare seeded `create`). Read it
through the new `isInheritedSeq(events, seq)`.
The constructor placement means persistence needs no changes: the marker is
already in `events` when a backend captures the creation seed, so it rides
the ordinary seed path with no load-time write. It also covers fork, where
the inherited bracket's owner may still be running — the case a
persistence-layer boundary could not reach.
Activity ordering excludes the boundary through `lastActivityTime()`, since
lazy resume makes browsing a pickup and the three call sites would otherwise
float every opened session to the top of a picker or list.
The seven behavior-pinning snapshots (workspace-flow, slash-flow,
todo-display, session-title, session-actions, terminal-card,
code-mode-fixture) asserted per-package behavior through the whole
built app: every assertion now lives in the owning package's suite at
equal strength (SlotTestRuntime benches assemble the same plugin apply
over the production slot machinery), while the assembled layer kept
re-failing on unrelated churn at 10s-timeout debugging cost.
What only this lane can prove is the artifact plane: lib/client.js
bundles loading through the ModuleLoader path, staged boot activation
across the inject layers, per-plugin CSS injection, and a journey
reaching chat content over the fixture transport. built-boot.snapshot.ts
pins exactly that, and nothing else — behavior assertions belong to the
package suites.
Sink the behavior previously held only by the apps/web jsdom snapshots
into the owning packages, each bench mounting the real apply on the
production slot machinery with fixture-fed data:
- ui-conversation/assembly-surfaces: the todo_write turn reaches both
product surfaces (keyed toolview row + dock plan strip via the todos
projection) and the strip follows projection retirement; the keyed
bash row carries its resident terminal card while the fallback row
reaches one through expand; the locked no-session view state; the
composer textarea surviving the blank→active conversion as the same
DOM node; the promptError alert strip with the machine-restored
draft; one summary update re-labeling the breadcrumb.
- ui-workspace/rename-assembly: the session-rename chain (row menu →
dialog → the injected renameSession hop → ISession.rename with the
edge-trimmed draft → dialog close and row re-label from the list),
plus the rejected arm keeping the dialog open with the error.
- runtime/workspaces-service: startInitialSelection — connects the
recent Workspace once both baselines are ready and opens the session,
stays idle with a current session or no recent target (double start
fails loud), and a failed connect returns to waiting and retries on
the next list change.
Component-level arms stay in the existing package suites; these files
prove only the assembled wiring.
The wire-echo stand-in for list-row settlement (title from the rename
unary response, running flips): benches mirror what the production
manager writes into the list store, so row re-label assertions need no
assembled app. Fixture ISession stubs must NOT call it re-entrantly —
they run inside a React event dispatch already wrapped in act, and a
nested act corrupts the global act queue (the next test renders an empty
tree); tests echo from their own top level instead.
