`agentFor` fenced subagent ownership through the attached session store
(`ctx.sessions.get`) and only then returned a live registered agent. A
registered agent whose session is ever absent from the attached store —
an invariant nothing in this package guarantees — would therefore be
handed out through generic Host routing unfenced, bypassing subagent
delivery entirely.
Fence `live.session` directly whenever a live agent exists, and keep the
attached-store check only for the not-live durable classification.
`ensureSession`'s race `.catch` already fences `live.session`; this makes
the fast path the same check instead of an asymmetric weaker one.
`hasSubagentDescriptor` sliced the whole own-suffix events array on every
Agent-bound RPC — including each `session.prompt` and `sessions.models`
call on long transcripts — and `ensureSession` rescans the same suffix
after creation. Replace the slice-then-some with an indexed loop from the
seed boundary, so the classification is a plain O(suffix) read with no
allocation.
The fork button on a stopped assistant message was inert. Frozen
interrupted nodes carry a flow-ordering seq of turnEnd.seq - 0.9, and
session.fork takes a non-negative integer on the wire, so every such
request was rejected as invalid-params before reaching the host — where
an aborted turn's logged turn/end has always made it forkable.
SessionsService.fork floors atSeq at the wire boundary. Flooring stays
inside the anchor's own turn (every turn opens with turn/start), so the
host's first-turn/end-at-or-after cut still closes on that turn.
- lifecycle-chrome's second scaffold staged its workspace under the OUTER
scaffold's temp root, coupling two supposedly independent worlds and
leaving the aria scrub root wrong; it now uses its own workspaceCwd.
- The direct-open path now carries the same `flowBusy` gate that disables
the equivalent menu entry, so an occupant re-registering mid-adoption
cannot raise a second flow.
- A composition with no directory-picker no longer opens a zero-entry
popover on the hero anchor: with nothing to pick and nothing to add,
the gesture shows nothing. Both behaviors gain a unit test.
- Brought three partially superseded Agent Notes current (the native
picker, the workspace UI product flow, and the sidebar browsing split),
cross-linked to this decision, both languages re-recorded.
- Corrected this Note's own Testing section: the shared e2e helper stages
and adopts its directory, it does not create one in-dialog — only
workspace-management does. Named the client-seam and CLI-README residue
in the follow-up TODO alongside the wire branch.
Both Workspace surfaces offered "Open local folder…" and "Create a new
workspace" for one outcome. The browse occupant already carries its own
New folder affordance, so picking a directory covered creating one; the
name dialog only added a second vocabulary and a create target the
operator could neither see nor choose.
The surviving entry is named after the outcome — "Add workspace…" — and a
menu now appears only where there is something to choose between: with no
Workspace listed (the add-only sidebar header, or an empty hero list) the
anchor gesture raises the directory flow directly instead of a one-row
popover. An empty list counts as final only after the list baseline lands,
and a composition with no directory-flow occupant hides the sidebar button
rather than offering a dead one.
WorkspaceCreateFlow becomes WorkspacePickFlow (createOnly -> addOnly) and
the injected createWorkspace narrows to { path }. The host's
workspace.create({ name }) branch and `dsh web --workspace-root` lost their
last product consumer; both are marked at the call site for a follow-up.
workspace.archiveSession answers the full updated archive set;
workspace.list carries the set as the reconnect baseline; the host
stream pushes host/archived-sessions-changed full snapshots from the
domain/changed global-put branch (same posture as workspace-changed).
Unknown sessions map to the existing session-not-found code.
The mutate seam's root-path ops, its non-array rejection, and the recursion
into an existing nested object were unexercised, as was the whole containment
side of the settings/document-updated fan-out and the before-snapshot repair
of a section a hand edit left non-object. The settings.mutate route had no
round trip at all: neither the client method nor the handler entry ran.
