Follow-up to the salvaged #66803 (@HexLab98):
- Two-strike boot marker: a single mid-boot abort (task-manager kill,
power loss) no longer disables the sandbox — only a second consecutive
abort, or a signature-confirmed GPU/renderer STATUS_BREAKPOINT death,
engages --no-sandbox.
- Version-scoped stickiness: the fallback marker records the app version
and re-probes the sandbox once after an update (new Electron or
installer ACL repair may have fixed the host) instead of degrading
forever. A failed re-probe returns straight to fallback.
- Launch-time icacls repair now runs only when the marker shows a prior
aborted boot (icacls /T recurses the whole install tree — healthy
launches skip it; the installer grants the ACE at install time), and
targets the install dir only. The userData grant is dropped: granting
S-1-15-2-2 RX on userData would expose Hermes sessions/config to every
AppContainer app on the machine.
- Renderer crash-loop recovery (same class as #56726, credit @Sahil-SS9
in PR #57414): a Windows renderer crash loop bearing the breakpoint
exit code gets the same one-shot --no-sandbox relaunch instead of a
dead window; unrelated crash loops keep the sandbox.
- Manual --no-sandbox launches are honored but never made sticky.
Tests: 15/15 windows-sandbox-fallback vitest; full desktop electron
suite 432 passed / 1 skipped.
Picking a model from the composer model pill left the pill's tooltip
stuck open over the fresh selection: Radix Tooltip opens on ANY trigger
focus (its isPointerDownRef guard only covers a pointerdown on the
trigger itself), and Radix menus/dialogs restore focus to their trigger
on close — so every mouse-driven pick ended with a phantom tip. Same
pattern on every Tip-wrapped trigger that opens an overlay.
Gate the focus-open to KEYBOARD focus: the trigger's own onFocus runs
before Radix's composed handler and calls preventDefault() unless the
trigger matches :focus-visible — composeEventHandlers skips onOpen for
defaultPrevented events. Chromium keeps focus-visible modality across
the menu round-trip, so a mouse pick's focus restore no longer opens
the tip, while Tab-focus still shows it (a11y unchanged). Fails open if
:focus-visible is unsupported.
Tests cover the three branches (suppress on non-keyboard focus, keep on
keyboard focus, fail open on selector error); chat/shell suites green.
node-pty's published npm tarball ships the POSIX `spawn-helper` with mode
0644 (no exec bit). node-pty `posix_spawnp`s that helper on macOS/Linux, so a
non-executable copy fails every embedded-terminal spawn with
`Error: posix_spawnp failed.`. Packaged builds are unaffected because
stage-native-deps.mjs chmods the staged copy, but the dev flow
(`npm run dev` -> `electron .`) resolves node-pty straight from node_modules,
which nothing chmods -- so the first terminal in dev always dies.
Restore the exec bit once, lazily, right before the first spawn, via a small
DI-testable helper. Idempotent: already-executable copies (packaged builds)
are left untouched, and stat/chmod failures are collected and logged rather
than thrown so terminal startup never breaks.
The onboarding overlay already contains a 'Local / custom endpoint' card
that writes model.provider:custom + base_url + api_key, but no reachable
Desktop GUI path opens it for a fresh add. The composer model pill falls
back to the gateway menu panel (Edit Models…), and Settings → Providers →
API keys is env-var-driven and never lists a custom endpoint — so users
following their instincts cannot add an OpenAI-compatible endpoint (Zyphra,
vLLM, Ollama, …) from the GUI.
Add a 'Local / custom endpoint' row to the API-keys tab that calls
startManualLocalEndpoint(), landing the overlay directly on the existing
custom-endpoint form. Reuses the tested onboarding flow; no new UI surface.
Regression test in providers-settings.test.tsx asserts the row renders and
opens the custom-endpoint flow.
Fixes#62817
Co-authored-by: David Metcalfe <80915+DavidMetcalfe@users.noreply.github.com>
* fix(desktop): trust Windows system CAs for remote gateways
Load Windows-trusted roots into Node's default TLS context before Desktop probes remote backends, while preserving bundled and extra CAs.
* test(desktop): cover Windows system CA installation
Verify existing trust roots survive the merge and that unsupported or unavailable stores fail open without changing TLS defaults.
* feat(attribution): conflict-free contributor mappings via contributors/emails/ directory
The AUTHOR_MAP dict in scripts/release.py was a merge-conflict magnet:
every concurrent salvage PR appended entries to the same lines of the
same file, so parallel PRs re-conflicted on every merge to main.
New system: one file per email under contributors/emails/ — filename is
the commit-author email, first non-comment line is the GitHub login.
File additions never conflict, so any number of PRs can add mappings
concurrently.
- scripts/release.py: AUTHOR_MAP is now LEGACY_AUTHOR_MAP (frozen)
merged with the directory at import time (directory wins). All
existing consumers (resolve_author, contributor_audit.py) unchanged.
- scripts/add_contributor.py: idempotent CLI to add a mapping; refuses
conflicting reassignments (incl. against the legacy map), validates
email/login shapes.
- contributor-check.yml: attribution gate now accepts a mapping file OR
a legacy entry; failure message prints the exact add_contributor
command. Also auto-resolves bare <login>@users.noreply.github.com
emails is intentionally NOT added (kept id+login form only, matching
previous behavior).
- contributor_audit.py: guidance now points at add_contributor.py.
- tests/scripts/test_contributor_map.py: 12 tests covering loader,
merge precedence, CLI idempotency/conflict/validation, subprocess E2E.
* feat(ci): one-shot per-file flake retry in the parallel test runner
A failing test FILE is re-run once in a fresh subprocess. Pass-on-retry
counts as green but is loudly reported in a '⚠ FLAKY' summary section
(with both attempts' output preserved) so the flake gets fixed instead
of eating a full-run rerun. Deterministic failures fail both attempts —
regressions cannot be laundered green.
- --file-retries N / HERMES_TEST_FILE_RETRIES (default 1, 0 disables)
- E2E verified: simulated first-run-fail flake goes green with banner;
deterministic failure still exits 1; retries=0 restores old behavior.
This converts the dominant CI failure mode (one timing-sensitive test
flaking a 4600-test shard, requiring a manual 10-minute rerun and an
agent triage loop) into a self-healing retry that costs one file's
runtime.
* test(approval): loosen wall-clock perf bounds 0.15s -> 2.0s
These guard against catastrophic regex backtracking (seconds-to-minutes
class), but 0.15s is within scheduler-stall noise on loaded shared CI
runners — test_max_accepted_separator_free_input_is_fast failed a CI
shard this week on runner load alone. 2.0s still catches the regression
class with zero flake surface.
* fix(ci): job timeouts everywhere + retries on all network installs
Reliability pass over every workflow:
- timeout-minutes on all 21 jobs that lacked one (a hung job previously
burned the 6-hour default runner budget)
- ./.github/actions/retry wrapped around every network-fetching install
that lacked it: pip installs (deploy-site, skills-index), npm ci
(deploy-site website, upload_to_pypi web + ui-tui), uv sync (docker
test deps). Deterministic build steps (npm run build) deliberately
NOT retried — split into separate steps so a real build failure fails
fast instead of retrying 3x.
* docs(agents): document the file-retry flake policy
* fix(ci): curl retries on deploy hook + skills-index probe
* fix(ci): kill the remaining transient-failure classes in workflows + Dockerfile
From the workflow reliability audit:
- tests.yml: duration-cache restore had NO restore-keys while saves use
run_id-suffixed keys — the cache never matched once, so LPT slicing
always ran blind and unbalanced slices pushed heavy files toward the
per-file timeout. One-line restore-keys fixes slice balancing.
- Label gates (lint ci-reviewed, supply-chain mcp-catalog-reviewed):
'gh pr view || true' turned an API blip into 'label absent' → false
BLOCKING failure. Now 3x retry, and API failure is reported as an API
failure instead of a missing label.
- detect-changes action: compare API retried before failing open (was
silently running all lanes on any blip).
- uv-lockfile-check: 'uv lock --check' resolves against PyPI — retried
so registry blips don't read as 'lockfile stale'.
- docker.yml merge job: imagetools create retried (Docker Hub eventual
consistency on just-pushed digests).
- Dockerfile: apt-get Acquire::Retries=3; s6-overlay ADDs converted to
curl --retry 3 (ADD cannot retry; checksums still enforced); npm
--fetch-retries=5; playwright chromium fetch retried 3x.
- Advisory artifact uploads (per-slice durations, ci-timings report)
get continue-on-error so an artifact-service blip can't fail a green
test slice.
* fix(tests): kill the two root-cause flakes — leaking pre-warm timer + env-dependent provider list
- test_tui_gateway_server.py: session.create / non-eager session.resume
arm a 50ms threading.Timer (_schedule_agent_build) that outlives its
test and fires into the NEXT test's _make_agent mock, racily
corrupting captured state (the recurring session_resume shard
failures). Replaced the per-test whack-a-mole stub with a module-wide
autouse fixture; the 3 worker-lifecycle tests that genuinely need the
deferred build opt back in via @pytest.mark.real_agent_prewarm (new
marker in pyproject).
- test_api_key_providers.py: PROVIDER_ENV_VARS is now derived from the
live PROVIDER_REGISTRY instead of a hand-list that had drifted
(missing HF_TOKEN / DEEPINFRA_API_KEY) — resolve_provider('auto')
tests failed on any machine with HF_TOKEN exported. E2E-verified with
HF_TOKEN/DEEPINFRA_API_KEY set: 42/42 pass.
* test: de-flake 30 timing-sensitive test files for loaded CI runners
Root-cause fixes from the flake audit (session-DB mining + repo sweep):
Event-based sync instead of sleep-sync:
- title_generator: mock sets threading.Event, wait(10) replaces
sleep(0.3) hoping the daemon thread got scheduled
- docker zombie_reaping / profile_gateway: poll-for-state helpers
replace fixed 1-3s sleeps (s6 transitions + SIGCHLD reaping are async)
- process_registry tree test: select()-bounded readline replaces an
unbounded blocking read (parent wedge now fails THIS test with a clear
message instead of an opaque rc=124 file kill); SIGTERM grace 1s->2s
(the 1s partition window mid-interpreter-startup is how a child PID
escaped the live-system guard in CI)
Timeout raises (loaded 8-way-sliced runners see ~5s scheduling floors;
all of these complete in ms-to-1s when healthy so the raises cost
nothing on green runs):
- subprocess/thread waits <= 2s raised to 10-15s across mcp_tool,
mcp_circuit_breaker, mcp_reconnect_retry_reset, mcp_parked_self_probe,
mcp_cancelled_error_propagation, registry, clarify_gateway, interrupt,
voice_cli_integration, docker_environment, session_store_lock_io,
planned_stop_watcher, cli_interrupt_subagent, thread_scoped_output
(joins now also assert not is_alive() so stragglers fail loudly)
- wall-clock discrimination ceilings loosened where the guarded hang is
10x larger: local_background_child_hang 4s->10s, interrupt_cleanup
setup 5s->20s + pgid-exit 30s->60s, mcp_stability grandchild spinup
5s->15s, protocol/gil-starvation fast-handler 0.5s->2s,
iso_certify_seam 1.5s->5s, wait_for_mcp_discovery 0.1s->1s
- narrow assertion windows widened: honcho first-turn wait 0.4..0.65 ->
0.25..2.0 (property is bounded-not-hung, not an exact wall-clock);
compression fork-lock TTL 1s->3s (12 refresh chances per lease);
compression-lock expiry margins symmetric (ttl 0.05->0.5, sleep 1.0)
- telegram hung-DNS bound 1.0->1.4 (fake hang is 1.5s — must stay under)
* fix(tests): repair indentation from de-flake batch edit
* fix(tests): harden env isolation and replace remaining sleep-sync races
The full 42k-test run and complete npm check surfaced three more classes:
- Environment isolation: local ~/.honcho defaultHost and SSH_* variables
leaked into Python/TUI tests. Pin the default Honcho host in the
hermetic fixture, isolate the one fallback test from ~/.honcho, and
blank SSH_* around terminalSetup tests. This flipped 20 false failures
back to deterministic behavior on developer machines.
- Background-thread sleep-sync: Honcho async writer tests patched
time.sleep globally, then busy-polled with that same mocked sleep. Under
full-suite load the poller could starve the writer. Each test now waits
on an Event emitted by the exact flush/retry transition; 30/30 passed
under 15-way contention.
- Desktop streaming: the test slept 80ms and assumed a 500ms timer could
not fire before its assertion. A loaded runner descheduled the test for
>500ms and both chunks arrived. Producer controls now gate second-chunk
and completion transitions explicitly.
Also make file-retry observability complete: a self-healed flaky file now
prints BOTH attempts' full output in the FLAKY summary. Two behavioral
runner tests prove pass-on-retry is green+loud+traceback-preserving, while
a deterministic failure remains red.
* refactor(ci): use gh bot pat, better retries
refactor(ci): use retry action for PR label fetch
the retry action now captures stdout as a step output, so it can serve
double duty: retry + output capture for commands like 'gh pr view' whose
result must be consumed by later steps.
Retry action gains:
- 'stdout' output (heredoc-delimited to preserve newlines)
- tee to temp file so stdout still streams to the job log
- step id 'retry' for output reference
Both lint.yml and supply-chain-audit.yml now use the retry action
directly with 'command: gh pr view ...' and read
steps.<id>.outputs.stdout.
ci: use AUTOFIX_BOT_PAT for all gh CLI / GitHub API auth
Replace secrets.GITHUB_TOKEN and github.token with
secrets.AUTOFIX_BOT_PAT across all workflows and composite actions
that use the gh CLI or GitHub API. The PAT has consistent permissions
across fork PRs (where GITHUB_TOKEN is read-only), avoids API rate
limit sharing with the default token, and is already used by
js-autofix.yml for the same reasons.
19 sites swapped across 9 files:
- lint.yml (3): label fetch, comment post/edit, comment update
- supply-chain-audit.yml (5): scan, critical comment, unbounded dep
comment, label fetch, mcp-catalog comment
- lockfile-diff.yml (1): PR comment post/update
- skills-index-freshness.yml (1): issue creation on degraded probe
- skills-index.yml (2): index build, trigger deploy workflow
- upload_to_pypi.yml (2): release view poll, release upload
- ci.yml (1): timings report
- deploy-site.yml (2): skills index crawl
- detect-changes/action.yml (1): compare API call
---------
Co-authored-by: ethernet <arilotter@gmail.com>
Third profiling round (after #66033 / #66347), targeting the composer
model picker and dialog opens (worktree dialog etc.), measured over CDP
on real 1000+-message sessions.
Backend — model.options took 4.8s cold / 1.8s warm per call, and the
desktop model pill/picker blocks on it every open:
- agent/credential_pool: _load_config_safe uses load_config_readonly().
Every consumer only reads, and the per-call deepcopy was the dominant
cost — list_authenticated_providers calls load_pool() per provider
row, and each load_pool loaded (and deep-copied) the full config
again via get_pool_strategy.
- hermes_cli/config: memoize ensure_hermes_home() per home path. It
runs inside the config lock on EVERY load_config(), paying ~14
mkdir/chmod syscalls per call. The fast path still re-checks that the
home dir exists, so a deleted home is recreated as before; profile
switches hit the new path and re-run. Tests cover both.
- tui_gateway/server: add model.options to _LONG_HANDLERS. It measured
seconds inline on the WS reader thread — while it ran, prompt.submit
and session.interrupt sat unread (same class as #21123).
Together: model.options RPC 4825/1842ms → 426/230ms (measured on the
live desktop backend); build_models_payload in isolation 6.2s → 0.97s
cold, 0.27s warm.
Desktop — every Radix dialog/popover open forced a whole-document style
recalc (Presence reads getComputedStyle on mount), which on a
1300-message transcript cost ~650-730ms per open (CPU profile:
getAnimationName 483ms self). The worktree dialog (⌘⇧B) paid it on
every single open:
- thread/list: content-visibility:auto + contain-intrinsic-size on the
per-turn group wrappers. Off-screen turns now skip style recalc,
layout, and paint entirely; never-rendered turns hold a placeholder
height (auto: remembered real size once rendered) so scrollbar and
anchoring stay stable. Verified over CDP: worktree dialog open 656-
730ms → ~200ms on the same session; stick-to-bottom pin, scroll-to-
top rendering, and sticky human bubbles all intact.
Also: profile-session-switch harness accepts CDP_HTTP (Chrome tends to
squat on 9222).
Verification:
- scripts/run_tests.sh: config, credential-pool, inventory,
model-switch routing, tui_gateway protocol, profiles suites green
(test_profiles has one pre-existing failure on main, unrelated);
new tests for the ensure_hermes_home memo.
- apps/desktop: tsc clean, eslint/prettier clean, thread + session
suites green (326 tests).
- E2E over CDP on the live app: numbers above, plus scroll/pin sanity.
$workingSessionIds and $attentionSessionIds were independently maintained
atoms that updateSessionState had to manually keep in sync with the session
cache (paired setSessionWorking/setSessionAttention calls, plus a rotation
special-case in ensureSessionState). Make them computed() projections of
$sessionStates instead, so the data flow is one-directional:
gateway event → cache → $sessionStates → computed views.
Transition side-effects (watchdog arm/disarm, settle grace, unread marker,
compression id rotation signal) move into handleTransition, fired from
publishSessionState by diffing previous vs next — one choke point instead
of per-callsite bookkeeping. The watchdog's force-clear reaches the cache
through setWatchdogClearFn rather than a listener set.
Also:
- clearAllSessionStates disarms all watchdog timers and drops settle-grace
entries so a gateway switch can't leak stale timers or keep-set rows
- dropSessionState disarms the dropped runtime's watchdog timer
- watchdog tests now exercise the real timer→callback wiring instead of
manually simulating the clear
Model-picker audit follow-through — closes the remaining pieces of the
"switch one session, switches everywhere / can't tell whose session this
is" report class:
- tui_gateway: `config.set key=fast` with a session no longer writes the
global agent.service_tier to config.yaml (sibling of the earlier
`reasoning` scoping fix). It pins create_service_tier_override
("priority" / "" for explicit normal) so lazy builds and rebuilds keep
the choice; the desktop's per-model presets were rewriting the global
tier on every model pick. Fast-support validation now checks a draft's
picked model, and `config.get key=fast` reads the pre-build pin.
- desktop: owning-profile tag (initial chip + tooltip/aria label) on
pinned rows and search results in the All-profiles sidebar, and on the
chat header once a second profile exists (#66003).
- desktop: composer model pill shows a pin dot + tooltip when a manual
sticky pick is overriding the Settings default for new chats (#62055).
Closes#66003. Addresses #62055.
Mirror CANONICAL_PROVIDERS so Fireworks sits directly under Nous Portal
(always visible) ahead of OpenRouter across onboarding, Settings → Providers,
and the API-key catalog.
Answering the review question on the PR table — why a hovered-cold
switch still showed ~440ms click → WS open: getConnection-only
pre-warming left the WS connect chain to the click, and its microtask
continuation can only run after the click's fresh-draft React flush
(unmounting a large open transcript costs ~300-400ms of render work),
so the socket didn't even START connecting until the flush finished.
Add openGatewayForProfile: the same spawn + connect chain as a real
switch, minus activation — so the hover leaves the profile's socket
fully OPEN and the click's ensureGatewayForProfile just activates it
(no ws:new after the click at all; measured ws open at hover+136ms on
a warm backend). No scheduleReconnect on failure: a hover is
speculative, so a dead backend must not start a background retry loop
— the real switch owns retry and error UX. Pruning semantics are
unchanged: a hover-opened socket for an idle profile is dropped by the
next pruneSecondaryGateways recompute, which just returns the click to
the previous behavior.
Tests updated: pre-warm asserts openGatewayForProfile is called and
that activation (ensureGatewayForProfile) is NOT.
A cold profile switch pays the full pool-backend spawn — Python boot,
port announcement, readiness probe, token adoption — before the
profile's gateway can even open. Measured with the new CDP harness
(scripts/measure-profile-switch.mjs, same family as
profile-session-switch.mjs): click → WS open is ~2.5-2.9s on a cold
profile, ~3-3.6s to a settled sidebar; a warm profile settles in
~0.5-0.8s. The pointer entering a profile square telegraphs the switch
hundreds of ms before the click lands, so start the spawn then.
- store/profile: prewarmProfileBackend(name) — fires the existing
hermesDesktop.getConnection IPC, which is idempotent (ensureBackend
returns the pooled connectionPromise), so the real switch joins the
in-flight spawn instead of starting it. Skips the active gateway
profile, throttles per profile (60s) so drive-by hovers can't spam
spawn attempts, and swallows failures — error UX belongs to the real
switch. No new IPC surface; the pool's existing LRU cap + idle reaper
still bound resource use, and the LRU guard never evicts a
keepalive-fresh backend for a hover spawn.
- sidebar/use-profile-prewarm: pointerenter/pointerleave handlers with
a 120ms dwell so sweeping the pointer across the rail or a
mixed-profile session list doesn't spawn a backend per element
crossed.
- Wired at the three switch surfaces: rail ProfileSquare, the condensed
ProfileDropdown items (extracted ProfileDropdownItem so each row owns
its dwell timer), and SidebarSessionRow (covers cross-profile resumes
from the all-profiles view; same-profile rows no-op inside the guard).
Measured E2E over CDP: synthetic hover on a cold profile square spawns
its backend in the background; the subsequent click settles in ~519ms
vs ~3.0-3.6s unhovered — and any hover shorter than the spawn still
shaves its dwell off the click's wait.
Verification: apps/desktop `npx tsc --noEmit` clean; full
`npx vitest run` 212 files / 1777 passed (new prewarm guard/throttle
tests in store/profile.test.ts); eslint + prettier clean.
Follow-up to #65890 (router transitions off) and #65898 (structural
compare + first-paint budget): profiling the switch path on real 1000+-
message sessions with a new CDP harness showed the remaining freeze is
NOT markdown rendering — it's a forced-reflow cascade from mount-time
layout reads interleaved with style writes across the transcript's
layout effects, plus the first-paint budget cut landing too late to
stop the full-budget commit.
Measured on the two largest local sessions (996 and 1363 messages),
main-thread longtask totals per switch: warm 2450ms -> 557ms and
1158ms -> 194ms; first paint 1690ms -> 444ms. Harness:
scripts/profile-session-switch.mjs (same CDP family as
profile-real-stream.mjs).
- use-resize-observer: drop the synchronous initial callback and ride
the observer's spec-guaranteed first delivery instead (same frame,
after layout, before paint). The sync call ran while the commit's
layout was dirty, so every size read in a callback forced a full
reflow — with one instance per user bubble (measureClamp read
scrollHeight, then WROTE --human-msg-full, re-dirtying layout for the
next bubble), the switch commit thrashed for over a second. Inside RO
timing the same reads are free. Composer metrics (2x
getBoundingClientRect + documentElement style writes) rides the same
fix.
- Same class, same fix at the remaining call sites profiling surfaced:
ExpandableBlock and TerminalOutput (dozens per tool-heavy transcript)
now measure/pin via RO initial delivery; the tool-window and
thinking-preview pins drop their sync pin() call; the thread
timeline's initial active-tick compute joins its existing
scroll-time rAF batching so back-to-back transcript updates coalesce.
- thread/list: cut the render budget in the RENDER phase (state-from-
props adjustment) instead of the post-commit layout effect. The
effect-time cut was too late — on a warm switch React first built and
committed the full 300-part tree, then re-rendered at 60, then bumped
back to 300, so the expensive commit still happened (and on a cold
switch the bump rAF usually fired while the transcript was still
empty, so the prefetched messages rendered at full budget anyway).
The render-phase cut restarts the component before any child renders;
a second trigger handles the cold path where messages land later
under the same sessionKey.
- thread/list: backfill 60 -> 300 inside startTransition so the older
turns' markdown+shiki render is interruptible background work instead
of a synchronous freeze one frame after the switch paints. Functional
Math.max so an urgent "Show earlier" click can't be rebased back down.
- composer focus: skip the rAF/timeout focus retries when the element
is already focused — focus() runs the full focusing steps (forcing
layout) even on the active element, ~585ms per switch on a large
dirty DOM.
- Replace the tautological render-budget test (it re-declared the
constants locally and asserted 60 < 300) with behavior tests of the
now-exported buildGroups + firstVisibleGroupIndex.
Verification: apps/desktop `npx tsc --noEmit` clean; full
`npx vitest run` 210 files / 1763 passed; manual CDP check confirms the
deferred backfill commits the full transcript, stays pinned to bottom,
and "Show earlier" still pages.
Follow-up to #65890 (router transitions off) and #65898 (structural
compare + first-paint budget): profiling the switch path on real 1000+-
message sessions with a new CDP harness showed the remaining freeze is
NOT markdown rendering — it's a forced-reflow cascade from mount-time
layout reads interleaved with style writes across the transcript's
layout effects, plus the first-paint budget cut landing too late to
stop the full-budget commit.
Measured on the two largest local sessions (996 and 1363 messages),
main-thread longtask totals per switch: warm 2450ms -> 557ms and
1158ms -> 194ms; first paint 1690ms -> 444ms. Harness:
scripts/profile-session-switch.mjs (same CDP family as
profile-real-stream.mjs).
- use-resize-observer: drop the synchronous initial callback and ride
the observer's spec-guaranteed first delivery instead (same frame,
after layout, before paint). The sync call ran while the commit's
layout was dirty, so every size read in a callback forced a full
reflow — with one instance per user bubble (measureClamp read
scrollHeight, then WROTE --human-msg-full, re-dirtying layout for the
next bubble), the switch commit thrashed for over a second. Inside RO
timing the same reads are free. Composer metrics (2x
getBoundingClientRect + documentElement style writes) rides the same
fix.
- Same class, same fix at the remaining call sites profiling surfaced:
ExpandableBlock and TerminalOutput (dozens per tool-heavy transcript)
now measure/pin via RO initial delivery; the tool-window and
thinking-preview pins drop their sync pin() call; the thread
timeline's initial active-tick compute joins its existing
scroll-time rAF batching so back-to-back transcript updates coalesce.
- thread/list: cut the render budget in the RENDER phase (state-from-
props adjustment) instead of the post-commit layout effect. The
effect-time cut was too late — on a warm switch React first built and
committed the full 300-part tree, then re-rendered at 60, then bumped
back to 300, so the expensive commit still happened (and on a cold
switch the bump rAF usually fired while the transcript was still
empty, so the prefetched messages rendered at full budget anyway).
The render-phase cut restarts the component before any child renders;
a second trigger handles the cold path where messages land later
under the same sessionKey.
- thread/list: backfill 60 -> 300 inside startTransition so the older
turns' markdown+shiki render is interruptible background work instead
of a synchronous freeze one frame after the switch paints. Functional
Math.max so an urgent "Show earlier" click can't be rebased back down.
- composer focus: skip the rAF/timeout focus retries when the element
is already focused — focus() runs the full focusing steps (forcing
layout) even on the active element, ~585ms per switch on a large
dirty DOM.
- Replace the tautological render-budget test (it re-declared the
constants locally and asserted 60 < 300) with behavior tests of the
now-exported buildGroups + firstVisibleGroupIndex.
Verification: apps/desktop `npx tsc --noEmit` clean; full
`npx vitest run` 210 files / 1763 passed; manual CDP check confirms the
deferred backfill commits the full transcript, stays pinned to bottom,
and "Show earlier" still pages.
Auto-compression ends the SessionDB session and forks a continuation,
rotating the stored session id. The gateway emits `session.info` with
the new `stored_session_id`, and the desktop's cache entry was updated
via `ensureSessionState` — but the URL route and `$selectedStoredSessionId`
never followed the rotation.
On the next send, `getRuntimeIdForStoredSession(oldStoredId)` returned
null (the cache entry's `storedSessionId` no longer matched the old id),
so `routedSessionNeedsResume` evaluated true, triggering a full
`session.resume` + REST transcript prefetch — the whole thread reloaded.
Fix: a new `$activeSessionStoredId` atom is set in `ensureSessionState`
when the active session's stored id changes. A `useEffect` in
`use-session-actions` subscribes to it and re-anchors the route +
selection (`setSelectedStoredSessionId` + `navigate(replace: true)`),
and cleans up the stale stored→runtime mapping.
`replace: true` because it's the same conversation — compression is
transparent to the user, so back-button stays correct.
* feat(desktop): add useKeybindHint hook and TipKeybindLabel
Add a shared hook that reads the current keybind combo for an action
id from the $bindings store (rebindable) or KEYBIND_READONLY (fixed),
returning a formatted string or null when unbound.
Add TipKeybindLabel — a convenience component that auto-reads both
its label (from i18n) and keybind combo from the action registry.
Pass only actionId for the common case; pass text to override when
the tooltip is context-dependent.
* fix(desktop): replace native title= on buttons with themed Tip
Migrate all <button>/<Button> elements using the native HTML title=
attribute to the instant, themed <Tip> component. Native tooltips are
unstyled, delayed (~500ms OS default), and visually inconsistent with
the app's instant themed tooltips.
Also adds <Tip> wrappers to icon-only buttons that were missing
tooltips entirely (dialog close, search clear, overlay close,
master-detail pane controls, keybind panel rebind/reset buttons).
Adds an enforcement test (no-native-title.test.ts) that scans all
.tsx files for <button>/<Button> with title= and fails if any are
found. Updates DESIGN.md with the icon-only button tooltip rule and
keybind hint guidance.
* feat(desktop): wire keybind hints into button tooltips
Add actionId to TitlebarTool, StatusbarItem, and SidebarNavItem so
their tooltips show the current keybind combo via TipKeybindLabel.
Fix the hardcoded NEW_SESSION_KBD in the sidebar to read from
$bindings so it stays live on rebind.
Wired surfaces:
- Titlebar: sidebar toggle, flip panes, keybinds, settings
- Statusbar: terminal toggle (view.showTerminal)
- Status stack: open agents button (nav.agents)
- Sidebar nav: new session, skills, messaging, artifacts
* feat(desktop): move keybind panel to settings tab with search filter
Move the keyboard shortcuts panel from a Radix Dialog into a proper
Settings tab (/settings?tab=keybinds). The ⌘/ shortcut and titlebar
keyboard button now navigate to this settings tab instead of toggling
a dialog. Adds a search filter to filter shortcuts by label.
- New: src/app/settings/keybind-settings.tsx (extracted from keybind-panel.tsx)
- Delete: src/app/shell/keybind-panel.tsx (dialog wrapper removed)
- Remove: $keybindPanelOpen atom and toggle/open/close functions
- Add: IconKeyboard to lib/icons.ts
- i18n: keybinds.search + settings.nav.keybinds (en, zh, zh-hant, ja)
* refactor(desktop): unify worktree dialog into shared WorktreeDialog
Extract the worktree creation dialog from StartWorkButton (sidebar) into a
shared WorktreeDialog component. Both the sidebar's StartWorkButton and the
composer's CodingStatusRow now use the same dialog, eliminating the duplicated
UI.
The shared dialog keeps the sidebar version's full feature set:
- BaseBranchPicker (filterable base branch combobox)
- Convert mode (check out an existing branch into a worktree)
- Sanitized branch name input
The coding row passes repoPath (from cwd) and onOpenWorktree (which carries
the composer draft to the new session) so the unified dialog works everywhere
there's a repo, not just inside an entered project.
Switching between chat sessions in the desktop app froze for up to ~1–2s on
large transcripts. Profiling the switch path surfaced three main-thread
blockers, fixed here minimally and without changing behavior.
1. JSON.stringify deep-compare (worst case). chatMessagesEquivalent compared
message parts with JSON.stringify(a) === JSON.stringify(b) on every switch.
On image-/large-blob-bearing transcripts this serialized every part twice
and cost well over a second. Replaced with a structural compare that never
stringifies: array-level identity fast-path, per-part reference fast-path,
then type-aware field comparison. The compare's only consumer asks "did the
transcript change, should I setMessages?", so it is deliberately
conservative — a false-negative just causes one extra idempotent
setMessages, while a false-positive (the unsafe direction) is avoided.
2. Scroll-settle loop. thread-list ran a requestAnimationFrame settle loop up
to 90 frames (or 5 stable frames) on every sessionKey change, each frame
forcing a synchronous layout read + write — racing the markdown paint for
up to ~1.5s. A normal synchronous switch stabilizes within a couple
frames, so the ceiling is now 2 stable frames / 15 max.
3. Synchronous first paint of up to 300 parts. On switch, thread-list reset
the render budget to the full RENDER_BUDGET=300, so up to 300 parts went
through markdown + shiki syntax-highlighting synchronously on the switch
commit. It now paints a small FIRST_PAINT_BUDGET=60 first, then bumps to
the full 300 in a requestAnimationFrame after the first commit.
Salvaged from PR #49807 by professorpalmer — re-applied to the restructured
file layout (use-session-actions/utils.ts, thread/list.tsx) and tests merged
into the existing utils.test.ts.
Co-authored-by: Cary Palmer <professorpalmer@users.noreply.github.com>
