Discovery proved only that a composition parsed, so a preset naming a
package a later rename took away kept a healthy card and its place in
every picker until a person switched to it. It now resolves each row it
can prove will start, reading the package off disk and falling back to
the resolver only for names that look absent — the resolver costs a
synchronous hooks-thread round-trip under the source launch's tsx hook,
which the walk avoids for every row it clears.
The mount diagnostic followed `AggregateError.errors` but never a cause,
so a group that failed on two rows named neither. It now follows a cause
that carries more than its own message.
A refused switch left the chip's label snapping back with no account of
why, which is the only account there can be for a preset that resolves
and then refuses. It announces through the shared Toast, which gained a
caller-set hold for a cause that names packages and rows.
Drop the width handle's double-click reset and tooltip — the handle is now
drag-only and a stored preference is only replaced by another drag — and
add a tertiary description line under the Settings font-size title stating
the size only affects conversation content. Update both Agent Notes and
the settings dialog goldens.
Render reconstructable system prompts at each request-series boundary, preserve series declarations through pre-step wrappers, and keep the presentation and replay snapshots aligned across clients.
Keep five non-blank rows stable while the selected blank New Session is provisional, and derive the overflow count from the rows still hidden.
Fixes#2841
The rail is a landmark on every Chat wide enough to show it, so each
recorded conversation with at least two loaded Turns now carries the
navigation node and its marks.
