* fix(stream): preserve fade nodes while prose is live
* fix(stream): preserve transparent fade nodes like assistant prose
The transparent-activity prose path (transparent_stream mode) kept the
pre-PR fade cleanup: _bindTransparentFadeCleanup() in static/ui.js still
replaced every animated stream-fade-word span with a fresh text node on
animationend, invalidating the native scroll anchor while the row is
still growing.
Mirror the messages.js fix so both live prose paths share one
node-preserving cleanup: remove only the transient is-new class and the
--stream-fade-ms inline property, keeping span identity until final
settlement rebuilds the persisted DOM.
Extend tests/test_smooth_text_fade.py with a sibling regression that
extracts the production _bindTransparentFadeCleanup() from ui.js and
fires animationend, asserting no replacement, is-new removal,
stream-fade-word retention, and timing-override cleanup (plus
source-string guards against replaceWith in the cleanup block). The new
test is red-before-green against the previous ui.js implementation.
* docs(changelog): stamp #6257 (stream fade scroll-bounce fix)
---------
Co-authored-by: Anthony Ruiz <ruizanthony@users.noreply.github.com>
Co-authored-by: nesquena-hermes <nesquena-hermes@users.noreply.github.com>
* fix(stream): stop fade-text effect from re-fading whole message on tool-call rewinds
When the fade-text effect is enabled, Hermes long tasks visibly blink the
entire message on every tool call. Root cause: tool-call XML
(<function_calls>) appears inline in the assistant text stream, and the
unclosed-tag stripping in _stripXmlToolCalls temporarily rewinds
displayText to a strict prefix. That rewind zeroed the fade playout
(_streamFadeNextText) and tripped _smdWrite's self-heal, which cleared
assistantBody.innerHTML and re-created every word as a fresh is-new
span — replaying the fade on all visible text at once.
Fix: on a detected rewind, shrink the playout cursor to the common
prefix instead of resetting to zero, and mute the fade renderer for
that common prefix during any rebuild (both the main smd path and the
anchor prose incremental node) so only the post-rewind tail animates.
Adds regression tests: playout rewind keeps common prefix visible,
rebuild mutes the common prefix, and _smdWrite's self-heal sets the
silent-prefix window.
* fix(#6783): compute rewind mute prefix in rendered-text space
Review feedback (maintainer round on 56c9307f): the silent-prefix budget
was computed in SOURCE-text space (charCodeAt over markdown source), but
the fade add_text hook only receives RENDERED prose. Markdown delimiters,
link destinations and MEDIA token bytes never reach add_text, so the
source-space budget over-muted the first genuinely new word after a
rewind (e.g. '**alpha** beta' -> '**alpha** gamma' muted gamma).
Fix: snapshot the OLD rendered text before the rebuild (assistantBody
textContent / anchor .msg-body textContent), then after parser_write
compare it with the NEW rendered text and strip is-new only from spans
inside the rendered common prefix (_streamFadeMuteRenderedPrefix).
- Rendered-space boundary, scoped to the owning node (no stream-global
counter that can survive a rebuild without a fade consumer)
- No state left behind on reduced-motion / safe-renderer / empty-text /
parser-finalization paths: _rewindPrevRendered is a local variable
consumed right after the rebuild
- Tests: plain-word mute, markdown/MEDIA byte regression (the blocker),
per-root scoping (main vs anchor), updated _smdWrite self-heal test
Gate: node -c OK; test_smooth_text_fade + test_smd_media_in_stream +
test_svg_audio_video_rendering + test_insights -> 83 passed, 18 subtests.
* fix(#6783): drop f-prefix from _fade_fake_node JS block (F541)
CI lint failure on a6d37b22: tests/test_smooth_text_fade.py:723 F541
f-string without any placeholders. The f-prefix was only used to escape
JS braces ({{ }}) — a plain string with literal braces is equivalent
and passes the ruff E9+F+B gate.
---------
Co-authored-by: silent-reader-cn <silent-reader-cn@users.noreply.github.com>
Co-authored-by: nesquena-hermes <nesquena+hermes@gmail.com>
Opt live assistant streaming nodes out of the global theme color/background transitions so token-by-token markdown updates do not flash or fade on light themes.
Adds a targeted regression test in test_smooth_text_fade.py while keeping the opt-in smooth text fade feature intact.
