Review follow-ups on the compositor spinner and the invalidation scoping.
Spinner CSS:
- Clip each frame to its own box. Braille renders from a system fallback
face (JetBrains Mono has no U+2800 block), whose metrics are not
guaranteed to fit the 1em frame, so neighbouring ink could bleed into
the viewport.
- Name descendants explicitly in the selection guard. The competing
`[data-selectable-text='true'] *` rule has the same (0,1,0)
specificity, so relying on inheritance made the winner depend on
stylesheet order.
- Scope the compositor promotion to spinners that are actually running.
A permanently promoted layer per parked spinner is pure memory at
fan-out breadth, where many sit mounted and paused at once.
- Give every var() the braille default as its fallback, so a missing
custom property degrades to a working spinner rather than an invalid
declaration.
Spinner component: replace the bare `as CSSProperties` cast on the inline
style with an exported GlyphSpinnerVars contract, so a typo in a custom
property name is a compile error rather than a silently dead declaration.
Assistant message:
- Render the inter-agent collapse as a CHILD of the normal body instead
of a competing root. The settled case previously returned a different
element type than the running case, so settling unmounted the whole row
and mounted a fresh one — discarding the DOM the scroll anchor held.
One component, one root, children vary; the truth table is unchanged,
including the collapsed row carrying no tapback listener.
- Collapse AssistantStatusSlot's separate subscriptions into one selector
returning a stable string. The inputs always move together on a status
flip, so reading them separately just multiplied the wake-ups.
- Give StreamingMarker a stable `data-slot` and assert on that rather
than on `span.hidden`.
Repro script: count settled rows by subtracting streaming markers from
message roots instead of `:not(:has(...))`. The selector walked every
row's subtree on each evaluation, inside the very latency window the
probe measures.
Comments: drop the stale translateY(-100%) description, name both pause
triggers, replace hard-coded line-number citations with selector/symbol
ones, note that only the primary window arms the renderer-pause
attribute, and move the forensic trace numbers out of source comments
into the PR.
Delete the three tests that asserted on stylesheet TEXT. AGENTS.md bans
reading source in tests outright, and they demonstrated exactly why: a
var()-fallback edit that changed no rendered pixel broke one of them.
Replacements that exercise the CSS in a real browser follow.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QwTc9XqUjhbay446VjugHZ
Removes the two residual invalidators left by the previous commit.
data-streaming: gone from the message root. The flag is not dead -- it is the
settled-row signal for scripts/run-short-session-hang-repro.mjs -- so it moved
to a permanently-mounted, display:none leaf that is a ROOT-LEVEL sibling, and
the repro now matches on the descendant. Placement is load-bearing three ways:
a node inside [data-slot='aui_assistant-message-content'] would steal
:last-child from the stall indicator and change inter-bubble margins mid-stream
(styles.css:1995-2003); keeping it mounted and toggling only the attribute
keeps the per-flip write on a childless node instead of making it a DOM
structure change; display:none costs no layout or paint while querySelectorAll
and :has() still match it.
Renamed to data-message-streaming rather than reusing data-streaming: shiki
puts that exact attribute on deferred code cards, which are descendants of the
message root, so a descendant-matching selector sharing the name would report
any message holding a deferred code card as still streaming.
root isRunning: gone from the standard path. AssistantMessage now dispatches on
interAgentSender, so the collapse gate's live status subscription lives in
InterAgentAssistantMessage and only the rare inter-agent case pays it. The
enter animation captures its enabled flag once off the runtime, non-reactively,
because use-enter-animation.ts parks the value in a ref behind a useCallback([])
identity and consults it only when the callback ref fires at mount -- a live
subscription fed a value the hook already ignores.
Adds inter-agent-collapse.test.tsx: the collapse gate and the marker contract
both had zero coverage, and nothing in the app reads the marker, so a delete
would otherwise look free and silently regress the repro's response gate.
Behavior-identical; invalidation scope only.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The desktop journal synchronously read, parsed, cloned, and rewrote one
aggregate localStorage value while streamed turns were repainting. Large
tool results and multi-session state could therefore block the renderer and
leave the app unresponsive, while the existing macOS diagnostic path lacked
a real native hide/restore regression check.
Store bounded recovery projections under per-session keys, migrate legacy v1
data once, isolate quota and storage failures, and preserve the newest
recoverable tail without allowing oversized writes to replace valid state.
Add a real Electron/CDP macOS-arm64 A/B harness with native visibility control,
renderer heartbeat and Settings/composer/transcript checks, plus focused
regressions. Keep bulk tool payloads, diagnostics, and the existing recovery
merge behavior out of the hot path.
Fixes#63047
Royalaid