The composer model dropdown (#composerModelDropdown) is a child of
.composer-footer, which sets container-type:inline-size (and, under the Geist
Contrast skin, a backdrop-filter). Both establish a fixed containing block, so
the phone position:fixed dropdown resolved against the FOOTER (pinned to the
bottom of the screen) instead of the visual viewport — dropping the menu below
the fold on all skins (the "tapping the model picker does nothing / opens
off-screen" symptom in #6080).
Fix (Fable UX gate recommendation on PR #6105): on the phone path
(<=640px) reparent the dropdown to <body> and switch it to position:fixed via a
.model-dropdown--floating class, exactly the working #profileDropdown idiom, so
fixed positioning is viewport-relative on every skin. The visualViewport math
from PR #6105 is preserved (viewport-relative coordinates, above/below flip
preferring the larger space, width = viewport - 16px, titlebar-bottom clamp) and
so are the rAF-coalesced visualViewport resize/scroll listeners.
Desktop (>640px) is unchanged: closeModelDropdown() and the desktop branch of
_positionModelDropdown() restore the element into its original .composer-footer
slot and clear the phone inline styles, so the desktop popover stays an
absolutely positioned footer child, byte-for-byte identical to master. Because
the menu now leaves the footer on phones, no per-skin backdrop-filter override
is needed.
Adds tests/test_issue6080_model_picker_reparent.py, including a node-executed
DOM-parentage guard that runs _positionModelDropdown()/closeModelDropdown()
against a stub DOM and asserts the open phone dropdown has NO .composer-footer
ancestor (escaping the container-type trap) and is restored into the footer on
close and on desktop.
Co-authored-by: webtecnica <75556242+webtecnica@users.noreply.github.com>
Three fixes in one commit:
1. **CI test mock** — Added addEventListener/removeEventListener to the
Node.js makeElement mock so viewport.addEventListener() calls in the
touch handler registration don't crash with 'not a function'.
2. **Two-finger pan during pinch** — Replaced _setScale() call with
direct transform math. The new formula computes scale and position
simultaneously:
ratio = boundedScale / pinchStartScale
x = currMidX - (startMidX - startPosX) * ratio
This keeps the diagram under both fingers regardless of midpoint
drift, enabling simultaneous zoom + pan.
3. **Post-pinch click suppression** — _onTouchEnd now sets dragged=true
when exiting pinch mode so any synthesized click event is caught
by the existing dragged guard in _openViewerOnClick instead of
opening the lightbox.
Adds touch event handlers (touchstart/touchmove/touchend/touchcancel) to
the Mermaid viewer viewport for two-finger pinch zoom, using the existing
_setScale() function with midpoint anchoring.
- Guards pointer handlers (down/move/click) during active pinch to prevent
interference between touch and pointer event systems
- Uses {passive: false} on touchstart/touchmove to allow preventDefault()
- Falls back gracefully on non-touch devices — touch listeners are inert
without touch hardware
Fixes: Mermaid diagrams in Hermes WebUI were not zoomable via multi-touch
pinch on mobile/tablet devices, frustrating users with complex diagrams.
Gate review follow-ups for the #6022 no-leak rule: every non-deliberate
newSession/session-new call site passes worktree:false; only deliberate
New Chat inherits the config default.
- Strict boolean config read: only YAML true enables the default;
quoted strings/ints/lists/dicts/null fall to the safe no-worktree
default instead of truthiness-coercing.
- Presence-based explicit detection: 'worktree' in body — an explicit
worktree:null is an opt-out, never a fall-through to config.
- Guarded remaining auto-mint call sites with explicit worktree:false:
profile switch (panels.js), promptWorkspacePath + switchToWorkspace
blank-page binds (panels.js), promptNewFile + promptNewFolder
(ui.js), terminal auto-session (commands.js).
- Tests: worktree:null vs config-true (factory must not be called),
strict-boolean malformed-shape matrix, static regression gates for
every auto-mint site + a bare-body sweep so future auto-mint paths
can't silently omit the key; updated the cmdTerminal preflight
assertion for the new call shape.
The full renderMd() pipeline maps MEDIA:<path-or-url> tokens to inline
images / video / audio / SVG / PDF / etc. via stash + restore passes.
The streaming smd renderer used by the live assistant body never went
through that pass, so any MEDIA token emitted mid-turn showed up as the
raw path string in the chat window and only became a real <img> once
the turn settled and the full render fired.
Fix:
- Extract the URL/media → HTML mapping in renderMd() into a shared
helper _inlineMediaHtmlForRef(ref, sessionId) so the streaming path
can reuse the same DOM the settled message will eventually render.
- Add _smdMediaAwareAddText in messages.js that wraps smd's add_text
to detect MEDIA tokens in any incoming text chunk and splice the
resulting <img>/<video>/<a>/<div data-path=...> node directly into
the smd parent via a DOMParser-created fragment. Plain prose still
delegates to the renderer it intercepted (so the fade renderer keeps
its word-by-word animation, the safe renderer keeps its O(n) plain
text-node insertion).
- Route _safeSmdRenderer.add_text and _streamFadeRenderer.add_text
through the interceptor. Each fast-paths the no-MEDIA case to the
original baseAddText so we can't recurse into our own wrapper.
Coverage:
- New test_smd_media_in_stream.py locks in the architectural invariants
(helper exists, both renderers delegate to it, recursion guard).
- test_renderer_js_behaviour.py driver now provides a minimal
_inlineMediaHtmlForRef stand-in so renderMd can be invoked standalone
under node without the rest of ui.js in scope (matches the patterns
renderMd already relied on for _IMAGE_EXTS / _SVG_EXTS / _AUDIO_EXTS).
- test_svg_audio_video_rendering.py static-count assertions relax from
">=2" to ">=1" since audio/video/SVG markup now lives in a single
shared function rather than being copy-pasted inside renderMd's
stash-restore closure.
* fix(transparent-stream): defer settled tool-detail DOM + cap per-turn rows (#5966)
Reported by @curtisszmania-cytocync.
Transparent Stream built a DOM node for every activity event of every settled
turn at load, and eagerly materialized each tool row's full detail body — a
15+ prompt reasoning-heavy history produced thousands of subtrees and tipped the
tab into a multi-GB freeze. The #5860/#5839 lazy-worklog fix did not cover
Transparent Stream (it never collapses).
Two-part surgical fix in static/ui.js, mirroring #5860's proven machinery:
- Row-detail deferral: a settled+collapsed transparent tool row renders
header-only; its heavy .tool-card-detail body builds on first expand
(_materializeTransparentToolDetail), recovering the tool call from the scene
after an innerHTML cache round-trip. Same anchor-suppressed post-processing as
the eager path, so an expanded row is byte-identical.
- Per-turn row cap: a settled turn with >CAP+SLACK (30+10) rows renders the last
30 behind a clean 'Show earlier steps (N)' affordance that materializes the
prefix in place with viewport compensation. Just-settled turn (keep-open token)
and already-revealed turns are exempt; true Trace tool-count is stashed so the
label stays honest; Expand-all reveals capped rows; cache-restore re-wires the
affordance. Live rendering is untouched.
Server-side #5858 (scene serialize-after-messages) already covers the container
RSS half on the experimental channel; this is the browser-DOM half.
* style(#5966): compact 'Show earlier steps' pill (hug content, left-aligned)
Constrain the affordance to fit-content width + align-self:flex-start so it
reads as a light inline control on the activity rail, not a full-width bar.
* fix(#5966): address Codex gate findings + Fable UX fast-follows
Codex SHIP-ONLY-WITH-FIXES (3 SILENT defects), all fixed + browser-verified:
- F1: buildToolCard PRE-BUILDS .tool-card-detail when a tool has args/output, so
the old `!detail` defer guard skipped exactly the heavy rows. Defer now fires on
settled+collapsed+has-detail and STRIPS any prebuilt body (verified: 400 shell
tool rows -> 0 detail bodies mounted; expand still materializes byte-identically).
- F2: stamp owner rawIdx on rows + affordance; dataset recovery and cache-restore
rebind resolve the scene-owning message (multi-segment turns own it on a later
segment, not the first) with a scene-owning-segment fallback.
- F3: persist revealed-turn state in a session/owner-keyed Set + invalidate the
session HTML cache on reveal, so a rebuild/switch-away never re-caps a turn the
user expanded (verified: reveal 30->400, full re-render stays 400).
Fable SHIP-UX fast-follows: t()-with-fallback label (+ en locale keys), 640px
touch breakpoint, stale comment fixed.
Tests: 21 pass (added has-detail deferral+strip, detail-less no-defer, owner-idx
recovery, persistent-reveal, i18n).
* fix(#5966): address Codex re-gate findings (r2)
Codex re-gate SHIP-ONLY-WITH-FIXES — 2 more SILENT defects, both fixed + browser-verified:
- F1(r2): _materializeTransparentToolDetail rebuilt via the thinner
_transparentToolDetailHtml(), dropping buildToolCard's richer detail (diff
coloring / show-more / canonical shell-command lead). Now transplants
buildToolCard(tc)'s own .tool-card-detail node so an expanded deferred row is
byte-identical to the eager path (verified: canonical structure + 595-char body).
- F2(r2): after an in-session renderMessages() rebuild (next send) an already-open
settled tool row got re-deferred, and disclosure-restore only toggled .open →
open-but-empty card. _setWorklogDetailDisclosureOpen now materializes a deferred
transparent row BEFORE toggling open (verified: expand → rebuild → still open
WITH content). Likely the same defect the RegressionGate caught intermittently.
Tests: 22 pass (added canonical-detail + disclosure-restore-materialize).
* fix(review): add show_earlier_steps i18n keys to all locales (#5966)
The transparent-stream row-cap "Show N earlier steps" pill added two new
i18n keys (show_earlier_steps, show_earlier_step_one) to the English block
only, so the strict locale-parity tests (zh/ko/ru/zh-Hant/...) failed with
missing-key assertions and CI shard 0 went red across 3.11/3.12/3.13.
Add both keys to all 14 non-English locale blocks with the English string as
fallback (the repo's established add-with-English-fallback convention for new
UI keys). Inserted after each block's collapse_all anchor. All 197 locale
tests + the #5966 suite green; node --check clean.
* fix(review): extract _transparentToolRowHasDetail into the #5700 harness
#5966 added a _transparentToolRowHasDetail() call into the settled transparent
render (_anchorSceneTransparentNodeForRow) to decide whether to defer a
collapsed tool row's detail body. The pre-existing #5700 timestamp test extracts
that render fn into a node harness but didn't extract the new helper, so the
extracted fn hit a ReferenceError → node exited non-zero → 3 #5700 tests failed
(RED across CI shards; the PR updated its own #5966 harness but missed this one).
Add `eval(extractFunc('_transparentToolRowHasDetail'))` to the harness. The
helper self-guards its _toolActionKind/_toolCardAllowsDetail deps (returns true
when absent), and the #5700 timestamp lives on the row HEADER (rendered even when
detail is deferred), so all 20 #5700 assertions pass unchanged — confirming this
was a harness gap, not a timestamp regression.
* fix(#5974): hide Show-earlier-steps pill when a capped transparent turn is collapsed (Fable UX gate)
Fable UX gate SHIP-WITH-UX-FIXES: the .transparent-earlier-steps pill wasn't in the
.assistant-turn[data-transparent-turn-collapsed=1] hide rule, so collapsing a capped
turn via the name-tag toggle left an orphan pill. Added it to the hide rule.
(i18n finding was already resolved — both pill keys present in all 15 locales w/
English fallback + show_earlier_step_one is live at ui.js:12918, not dead.)
* Release exp-v0.52.50: transparent-stream lazy settled DOM + per-turn cap (#5974, #5966)
---------
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>
* fix(#4685): meter post-compression model context
* Release exp-v0.52.48: meter post-compression model context (#5872, #4685)
---------
Co-authored-by: Rod Boev <rod.boev@gmail.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
* fix(streaming): keep errored-turn assistant response visible (#5941)
An errored turn that produced assistant content (tool calls + reasoning)
folded that content into a collapsed worklog above the error card, so the
user read a lone error bubble as "nothing came back". The settled-scene
renderer collapsed the worklog unconditionally, never consulting the
turn terminal_state. Now an errored/failure terminal_state keeps the
worklog expanded by default (unless the user explicitly collapsed it),
while completed turns and genuinely-empty errored turns are unchanged.
Reported by @b3nw.
* fix(review): update #4970 brittle collapsed-expr assertion for #5941
test_issue4970_stream_done_shrink_regression asserted the literal
`collapsed:!keepSettledWorklogOpen` in _renderSettledAnchorSceneForMessage.
#5941 OR'd an errored-turn keep-open term into that expression
(`collapsed:!(keepSettledWorklogOpen||erroredWorklogKeepOpen)`), so the
substring no longer matched and the test failed in the full suite (the PR
updated its own touched tests but missed this pre-existing one).
Re-anchor to `collapsed:!(keepSettledWorklogOpen` — still guards #4970's
invariant (keepSettledWorklogOpen negates into the settled-render collapsed
flag) without pinning the exact term list. #4970 + #5941 suites green.
* fix(chat): honor explicit model pick on post-failure recovery send (#5924)
The onchange explicit-pick marker is single-shot: send() consumes it once.
submitEdit() and cmdRetry() truncated and called send() directly without
re-arming it, so the recovery send went out with explicit_model_pick=false and
the server's compatible-model resolution re-reverted a freshly-picked
cross-family model back to the failed/stale value (Facet 1). Facet 4 is the
same loop keeping the persisted model_provider pinned across fork/refresh.
Re-arm the pending explicit-pick marker from the current selector state
immediately before await send() in both recovery paths. Survives a second
consecutive recovery send. Normal send path and the #3737/#5731 server repair
guard are unchanged.
Reported by @b3nw.
* fix(#5924): gate recovery re-arm on genuine pick + session-race guards
Codex gate found 4 defects on the recovery send path; fixed all:
- /retry + edit-resubmit re-armed the explicit-pick marker UNCONDITIONALLY, forcing
explicit_model_pick even with no fresh pick (suppressed server compatible-model
resolution). Now gated on _recoveryPick (selector model differs from session's own
stored model), captured pre-await.
- session-switch races: added active-session guards after the retry GET await and the
edit truncate await so session A's recovery intent can't apply to session B.
- 3 new regression tests (gated re-arm, pre-await capture, post-await re-guard).
* fix(#5924) round-2: derive recovery pick from non-default session model, not inference
Codex round-2 CORE: the state-comparison predicate false-negatived an already-applied
pick (consumed marker → looks unchanged) and false-positived on provider inference
(@removed:mistral-large + null stored provider → inferred 'removed' → fake change).
Replace with _deliberateSessionModelPick(sid): reports {model,provider} only when the
session's OWN model is genuinely non-default vs window._defaultModel/_activeProvider —
inference-free + survives marker consumption. Both recovery paths + tests updated.
* fix(#5924) round-3: require known-default+owned-provider evidence + fire-time re-arm guard
Codex round-3: (1) _deliberateSessionModelPick still false-positived when the
profile default was unknown or the provider was only inferred — now requires a
session-OWNED provider AND a known window._defaultModel/_activeProvider, else
fails closed. (2) new same-session race: a model change DURING the recovery awaits
made the pre-await pick stale and clobbered a newer marker — new _reArmRecoveryPick
helper re-arms only if the current session model/provider still equals the captured
pick AND no different pending marker exists. Both recovery paths route through it.
* Release exp-v0.52.45: errored-turn response stays visible (#5950/#5941) + recovery honors model pick (#5949/#5924)
* fix: keep absoluteKeepCount capture before _recoveryPick in submitEdit
The #5924 _recoveryPick comment contained the word 'await', tripping the
pre-existing test_issue_edit_regenerate_absolute_keep_count regex (first \bawait\b
must come after the absoluteKeepCount capture). Reorder both synchronous pre-network
captures (absoluteKeepCount first) + reword the comment. No behavior change.
---------
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>
* fix(transparent-stream): stop compact worklog from hijacking transparent live render (#5942, #5943)
Transparent Stream turns with tool calls alternated between the grouped compact
worklog summary ("Processed Ns") and the individual per-event row list (#5942), and
rebuilt every live row element each tick causing flicker (#5943, regression of #5367).
Root cause (bisected to the #5739 merge as a MERGE INTERACTION; #5700/#5739 timestamp
code is NOT causal): #5746 (final-answer-only mode) reworked renderLiveAnchorActivityScene
so a caller-supplied `requestedMode` (opts.mode) OVERRODE the user's active display mode.
Several live callers (appendLiveToolCard, ensureLiveWorklogShell, appendLiveCompressionCard,
appendLiveThinking, session restore in sessions.js) hardcode {mode:'compact_worklog'}.
Before #5746 the dispatch checked isTransparentStream() FIRST and ignored that hint; after,
those callers forced the compact grouped render onto a transparent turn. The compact pass
deletes the keyed transparent rows, so the next transparent tick's preserveByKey reuse
(the #5367 element-reuse fix) misses -> it rebuilds a grouped frame then tears it down and
recreates every row = alternating + flicker.
Fix (two layers, defence in depth):
1. renderLiveAnchorActivityScene: the USER's active chatActivityMode() is authoritative;
opts.mode is only a fallback when there is no usable active mode. A compact_worklog hint
can no longer override an active transparent_stream (restores the good-build precedence).
2. Removed the now-dead hardcoded {mode:'compact_worklog'} argument from all 8 current-view
live/restore call sites (ui.js x5, sessions.js x3) so intent is explicit and the helpers
resolve the active mode via chatActivityMode().
Compact_worklog folding, hide_all_activity suppression, the #5700/#5739 timestamp feature,
and #5860 lazy settled-worklog materialization are all unaffected.
Verified with the crown-jewel stream regression gate (private workspace): transparent_stream
goes rowElementSwaps 1105->0 and groupedFramesInTransparent 42->0; hide_all_activity clean.
Independently root-caused + fix-shape-confirmed by Codex adversarial review.
* fix(transparent-stream): also make projection mode active-authoritative in _renderLiveAnchorActivitySceneForStream (Fable advisory — kill latent requestedMode-wins drift)
* test(#5942/#5943): update brittle source-string assertions for removed {mode:'compact_worklog'} arg
test_live_to_final_anchor_visible_order.py asserted the literal presence of the now-removed
hardcoded compact-mode arg (in ensureLiveWorklogShell + the sessions.js restore path). The fix
correctly drops that arg so the helpers resolve the active display mode. Updated both to assert
the mode-free call / active-mode behavior instead of the removed literal. 63/63 in-file pass.
* revert wrapper projection-mode change (preserve #3820 explicit-mode contract)
The follow-up 8f654f0c0 made _renderLiveAnchorActivitySceneForStream projection-mode
active-authoritative, but that broke the #3820 contract (test_issue3820: explicit hide_all
honored when active=compact; hide_all-active always wins). Fable flagged this only as an
advisory/latent cleanup, NOT required — the real fix is the central renderLiveAnchorActivityScene
dispatch + call-site arg removal, both proven by the gate. Reverting the wrapper restores #3820
(109/109 targeted tests pass) with the bug fix fully intact.
* test(#1426): make OpenRouter live-fetch test hermetic by mocking curated fetch
test_openrouter_group_uses_live_fetch_when_available failed deterministically
in any environment where the hermes_cli agent package is installed AND the
network is reachable, e.g.:
pytest "tests/test_issue1426_openrouter_free_tier_live_fetch.py::\
test_openrouter_group_uses_live_fetch_when_available" -p no:xdist
assert 'minimax/minimax-m2.5:free' in
['anthropic/claude-sonnet-4.6', 'anthropic/claude-fable-5', ...]
Root cause — a gap in the test's mock, not a production regression:
get_available_models() populates the OpenRouter group from TWO live fetches:
(1) hermes_cli.models.fetch_openrouter_models() — the curated catalog.
This routes through hermes_cli's open_credentialed_url(), which builds
its own opener and calls .open(); it does NOT go through the
module-level urllib.request.urlopen symbol the test monkeypatches.
(2) a direct urllib.request.urlopen(".../v1/models") free-tier augment —
this one IS intercepted by the monkeypatch.
The test only patched urllib.request.urlopen, so fetch (1) hit the real
network and returned ~36 live curated models. Those filled the visible picker
cap (15), pushing the mocked free-tier entries (minimax/minimax-m2.5:free,
openrouter/elephant-alpha) into the group's extra_models bucket. The
assertion only inspected the visible `models` bucket, so it failed. In CI
(hermes_cli absent) fetch (1) raised ImportError, the curated base was empty,
the 2-3 mocked entries fit the visible cap, and the test passed — hence the
environment-dependent failure.
Production is correct: free-tier models DO surface in the picker (verified
they land in extra_models). The fix keeps the coverage intent intact:
- Mock fetch (1) too (as sibling tests already do) so the test is genuinely
hermetic — matching this module's docstring promise of "without depending
on real network access" — with a small curated base so live data, not the
fallback list, is exercised.
- Assert the free-tier IDs surface across BOTH picker surfaces (`models` +
`extra_models`), matching the sibling fail-closed and cap tests, so a
large curated base overflowing the visible cap no longer flips the result.
No production code changed.
* Release exp-v0.52.39: transparent-stream mode-precedence fix (#5946/#5942/#5943) + hermetic OpenRouter live-fetch test (#5947/#1426)
---------
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
Salvaged from #4627 by @perejaslav. Core Hermes already supports
reasoning_effort=max; this closes the WebUI parity gap (Anchor-A) — adds
max to VALID_REASONING_EFFORTS + dropdown/chip/reasoning-command, keeps
the degrade ladder for capped models.
Co-authored-by: perejaslav <perejaslav@users.noreply.github.com>
Two non-blocking UX improvements from the Fable gate on #5739:
1. Full date+time tooltip (title attr) on the worklog event-time label — the bare
clock is date-ambiguous when a settled session is reviewed later or a run crosses
midnight. New _activityFullClockLabel (range-guarded so a bad epoch never yields
'Invalid Date' in the tooltip) + test.
2. Hide the time label under 420px — its ~50px of fixed chrome squeezes the
collapsed row's flexible preview toward zero on phones.
Co-authored-by: rodboev.
2026-07-11 00:38:23 +00:00
nesquena-hermesandrodboev. Gate findings from adversarial Codex re-gate.
Two gate findings on the worklog-event-timestamp feature (#5700/#5739):
1. Thinking-row timestamps disappeared after settlement. Reasoning source events
carry no server timestamp; the live DOM showed a fallback time but the settled
scene row rebuilt with created_at:null. Now stamp created_at on the source event
the first time it's seen (messages.js apply path) and carry row.created_at
through snapshot hydration, so the timestamp survives live->settled.
2. A garbage huge numeric timestamp (e.g. 1e20) passed the finite/>0 checks and
rendered literal 'Invalid Date'. _timestampSeconds now rejects epochs outside
JavaScript's valid Date range. Added a regression test.
Co-authored-by: rodboev. Gate findings from adversarial Codex re-gate.
Two visible render PRs, gate-passed (deep-review round), Nathan-approved to ship.
- #5757 (rodboev): mark active model with a Selected badge + open its provider group (#5748).
Screenshot-verified (badge clear + correctly placed on active row).
- #5758 (rodboev): suppress the live-token prose row that is a strict prefix of the final
answer (#5749). Provenance-gated (live-prose:* token rows after last tool row only) so it
can't eat legitimate narration; reproduction test proves the dupe is gone.
Codex SAFE + full regression green (1576 render tests). 18 own tests pass together.
Co-authored-by: t <a@b>
Co-authored-by: rodboev <rodboev@users.noreply.github.com>
Codex gate CORE: /api/updates/apply + /force ignored the request-body channel
and re-read the saved setting, so a channel switch whose debounced autosave
hadn't landed could apply the OLD channel. The banner now sends the channel the
CHECK reported for each target; the endpoints validate it against the enum and
thread it into apply_update/apply_force_update (None → saved-setting fallback,
preserving prior behavior). Agent stays channel-neutral server-side.
When transcript virtualization is disabled (the #4325 opt-out,
_virtualizeTranscript===false), renderMessages() renders every row with no
windowing and never runs the virtualized measure pass
(_updateMessageVirtualMeasurements early-returns when !virtualized). Under
@media (pointer: coarse), .msg-row[data-role="user"] carries
content-visibility: auto; contain-intrinsic-size: auto 96px. Every rebuild does
inner.innerHTML='' then recreates rows as fresh elements, so a fresh off-screen
tall user row (a long paste measuring thousands of px) reserves only the flat
estimate instead of its real height. scrollHeight shrinks by (realHeight -
estimate), the browser force-clamps scrollTop, and the viewport jumps backward
(a browser clamp, JS=none, so scrollTop-write compensation cannot catch it).
#5638 fixed this for the virtualized wipe-and-rebuild path but left the
non-virtualized full-rebuild path uncovered.
Fix, three coordinated parts:
- _estimateUserRowIntrinsicHeight weights CJK / full-width characters as ~2
columns (they wrap at ~24 chars/line, not 48), so a CJK paste reserves close
to its real height even before it is ever measured.
- _applyUserRowIntrinsicHeight reserves max(remembered, estimate): a remembered
height can be a partial paint (a row taller than the viewport only paints its
intersecting slice under content-visibility:auto), so the estimate floors it.
- _rememberRenderedUserRowIntrinsicHeights, called pre-wipe inside
renderMessages, reads the still-laid-out rows' real heights and persists them
keyed by session-relative index, only for rows within the viewport (a fully
off-screen never-painted row reports its collapsed reserve and must not poison
the map), floored at the estimate.
Desktop rests at content-visibility:visible so intrinsic-size is inert there;
verified no behavior change with pointer:fine.
Adds tests/test_issue5744_nonvirtual_userrow_collapse_jumpback.py (7
mutation-checked node-harness tests). Existing #5637/#5638 suites and the
render/virtualization suites pass.
When the anchor row is gone and a virtual top-spacer is present but the snapshot
carries no captured topPadBefore (null), Number(null) is 0, so the topPad-delta
branch would add the ENTIRE current spacer height to scrollTop and fling the reader
far from their content. Guard on an actual (non-null) captured topPadBefore; else
keep the raw fallback target. Mutation-checked (drop the null guard -> the reader is
flung 1300px and the test fails).
Round-2 gate-cert proved the round-1 'snapshot.top + delta' + nearest-to-current
arbiter is mathematically unwinnable: a row's rect offset is scroll-relative
(rect.top - containerRect.top = rowContentPos - scrollTop), so a staged absolute
target only equals the true content-hold when scrollTop == snapshot.top — and in
that exact case the arbiter measures |raw - cur| = 0 and picks raw, writing the
stale value (the reported up-jump, unfixed).
Rework to the app's own realign idiom (mirrors _restoreMessageViewportAnchor and
_compensateScrollForMeasurementDelta): when a measurable anchor row exists, write
el.scrollTop += (currentOffset - capturedOffset) from the LIVE scrollTop — a no-op
when already aligned, a heal when not, no arbiter. Restore the per-tier lookup
guard (key -> sessionIdx, never the rawIdx degradation that maps to a different
message after a virtualization re-window). Genuinely-gone anchor: mirror the
topPad-delta idiom the snapshot already carries (topPadBefore), else keep raw.
Gate-cert tests now use scroll-dependent rect mocks (rect.top = rowContentPos -
scrollTop) so certified hold numbers are physically realizable; mutation-checked
(revert to raw -> the hold tests fail; drop topPad-delta -> that test fails).
Frontend fix for the model-picker provider-contamination vector of #5567 (the
backend HERMES_HOME vector shipped in #5577). Credit @b3nw for the root-cause trace.
_modelStateForSelect(sel, modelId) resolved the provider from sel.selectedOptions[0]
(the dropdown's CURRENTLY-selected option) instead of the option whose value matches
modelId. During a profile/tab switch or a model-list rebuild the dropdown transiently
still holds the PREVIOUS profile's default option (e.g. an ollama model), so the wrong
provider was stamped onto a model it doesn't own, persisted into the session's
model_provider, and (since _modelProviderForSend reads the stored value first) re-sent
on every turn -> 'Provider ollama...no API key' for a provider the session never used.
Fix: resolve the provider from the option whose VALUE === modelId; trust the
currently-selected option only when its value matches (preserving the user's exact
pick in the same-value/different-provider collision case). A genuinely-absent model
yields a null provider so the backend re-infers.
This is the WRITE-site fix — it stops all NEW contamination (new-session + send paths
route through _modelStateForSelect). Both Codex and Fable reviewed it SAFE.
Repairing sessions ALREADY poisoned before this shipped is deliberately deferred to a
separate follow-up: a 3-round Codex+Fable gate proved a frontend load-time repair that
reads the shared #modelSelect DOM is a cross-session race surface (it re-manufactured
the reverse-contamination it aimed to fix), and it can't reliably heal live-only-model
sessions anyway. The robust place for that repair is the backend chat-start boundary,
where session + profile identity is unambiguous. Already-poisoned sessions self-heal on
their next healthy send / manual re-pick in the meantime.
Tests: node-behavioral resolver scenarios (tab-switch race, same-value collision,
missing-model null, match-by-value, default->null) + the unrelated-selected-option
case from #5727. Partially addresses #5567 (write-vector); follow-up tracks the
already-poisoned-session repair.
Co-authored-by: b3nw <b3nw@users.noreply.github.com>
Frank Song