An agent read the amix line's conditional `normalize=0` as "the render
averages its tracks" and spent two full renders chasing loudness. The
reference documented `data-volume` and the master bus but never said how
tracks combine.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
* feat(lint): warn when a sub-composition's linked stylesheet names its root id
* chore(skills): regenerate the skills manifest
* fix(lint): the linked-stylesheet hint names fixes that lint clean
* docs: one Troubleshooting page, four tabs, and the start pages folded
* docs: keep how Studio app updates arrive on the help page
Folding the Studio app troubleshooting page into /help dropped its
"How updates arrive" section: the update button, Settings > Updates
and the Mac menu route, the Automatic updates toggle, and what to do
when an update stalls or cannot check. It is back word for word; every
label is still in the app.
* docs(studio): the browser editor in six pages, named the browser editor
* docs(studio): mute where the editor has it, and no solo control
The audio pages still described a solo control and a group-row mute that
the editor does not render. Muting is the speaker button on an audio
track (Mute track / Unmute track), the same toggle on a selected clip,
and the Muted switch; a group is silenced through its members' tracks.
The audio reference drops its solo section for the same reason.
* docs(prompting): the Prompt Guide as six topic pages
* docs(prompting): call the skill the way each agent does
The overview told every own-agent user to start with /hyperframes; Codex
uses $hyperframes, and other agents have their own way. The line now
names both and keeps the caveat the old page had.
* docs(guides): media pages titled by the task people search for
* docs(guides): background fixes as a visible section; list color grading as an agreed deletion
* fix(core): a self-closed audio group no longer hides the clips after it
HTML does not close a custom element on `/>`, so `<hf-audio-group id="sfx" />` takes in every
later sibling, and the runtime's inert style (`display:none`) hid them in preview, snapshot and
render. The style is now `display:contents`: an empty group still makes no box, and anything
inside one renders as written. A lint warning names the elements a group holds, and the docs and
mixing reference show the group closed.
* style(core): cut the audio group comments to the comment length limits
* fix(core): a muted audio group still hides what sits inside it
A muted bus (`data-hidden`) is hidden by an inline display:none that the bus rule outranked, so
clips inside a muted self-closed bus kept painting while their audio and video frames dropped.
A sub-composition file with a <template> is mounted from the template alone, so a <style>
in its <head> (or a stylesheet link in its body) never applies in preview, snapshot or render.
Warn on it, with the fix in the message: move it inside <template>.
* fix: data-volume multiplies the volume lane in preview and render
* fix: a clip's data-volume plays ahead of its audio effects, in preview and render
* feat(studio): the media panel shows a clip's Gain beside its Volume level
* fix(audio): cap gain times volume lanes through each ramp
* chore(core): account for shared volume envelopes in package budget
* fix(core): restore static gain when a playing lane is removed
* refactor(skills): fold six domain skills into hyperframes and media-use guides
hyperframes-core, -animation, -keyframes, -creative and -studio move to
skills/hyperframes/{core,animation,keyframes,creative,studio}/, and
hyperframes-audio moves to skills/media-use/mix/. Each moved SKILL.md becomes
a frontmatter-free GUIDE.md so installers that scan recursively for SKILL.md
no longer see them as skills; the published list goes from 21 to 15.
Relative links, code paths and skill-name mentions are rewritten to the new
locations, the catalog surfaces, marketplace core-skills list, fallback core
set, module-copy targets and skills-manifest.json follow, and
`hyperframes skills update` now removes the retired skills (RETIRED_SKILLS)
when they are still installed.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): slim the core entries and give media-use a HeyGen and a free path
The four entries every run opens are rewritten to what an agent cannot infer:
hyperframes 21.8 KB to 7.7 KB, hyperframes-cli 24.8 KB to 6.9 KB,
hyperframes-registry 9.9 KB to 4.3 KB, media-use 9.7 KB to 4.9 KB. Detail moved
whole into references (routing close calls and creator edits, CLI pin upgrades,
catalog search tiers, CLI conventions and feedback reports).
- hyperframes: state table, routing, the render contract, a terminal work loop
(check, snapshot, preview before render), the desktop-app hand-off, and a
table of the folded guides.
- media-use: one table of HeyGen versus free local tools per need; HeyGen
sign-in, credits and the CLI's video-agent, avatar, clone, lipsync, translate
and clipping commands; every free path works with no account.
- scripts/check-core-skills.mjs holds entries and descriptions to budget and
checks every taught `npx hyperframes` command and path; runs in lint.
- Core entries are exempt from the formatter: its table padding cost ~1.5 KB
per entry on every run.
- Content tests follow the text to its new home.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): plugin runs skip skills update; media-use explains HeyGen sign-in and TTS setup
The smoke eval showed a presenter request never reaching media-use and the
free voiceover failing on a missing kokoro-onnx; plugin runs also ran the
skills update the plugin rules forbid.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* chore(skills): drop a committed Python bytecode file and ignore bytecode
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): align the entry with the Studio skills and keep the workflows' measured facts
The entry drops routing and the intent interview and carries the contract, the
editable-project rules and the work loop. Studio's format, runtimes, motion,
look and captions references come over for terminal use, frame presets move to
assets/, media-use gains Studio's mixing and local-command references, and
film.md and overlays.md keep what the workflow skills measured.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills)!: retire the workflow skills and folded guides; publish seven knowledge skills
The skill pack now publishes exactly seven skills - hyperframes,
hyperframes-cli, hyperframes-registry, media-use, figma, slideshow and
remotion-to-hyperframes - carrying knowledge, not process. The eight
workflow skills, the folded domain guides and the routing/interview
references are deleted; their measured facts already live in the
hyperframes references (format, runtimes, motion, look, captions, film,
overlays) and media-use's mixing reference.
- bake-basemap.mjs and locate.mjs move to skills/hyperframes/scripts/
(bake-basemap gains --help); extract-audio-data.py moves to
media-use/audio/scripts/ for the caption motion reference.
- skills update: the eight workflows join RETIRED_SKILLS so existing
installs prune them (by lock attribution only, since their names are
generic); naming a retired skill reports where its knowledge went and
succeeds instead of failing as unknown.
- Capture prompts point at the hyperframes skill's references/film.md;
the live-map warning names the new bake-basemap path.
- Content tests that pinned knowledge are retargeted to the kept
references; tests of deleted workflows, scripts and process go.
- Catalog surfaces, templates and docs describe the seven skills.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): resolve the local.md captions link and allow capture's output files in citations
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): regenerate the skills manifest from tracked files only
The committed media-use hash included an ignored __pycache__ bytecode file present
in the local checkout, so CI's clean checkout hashed differently.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(docs): restore generated catalog pages and docs navigation to main
Catalog PRs commit item sources only; CI regenerates the pages from the edited
registry sources. docs/docs.json is catalog navigation, so its Workflows group
rename is left for a non-catalog PR.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* build(cli): raise the CLI size budget for the skill references it bundles
The CLI bundles skills/hyperframes, which now carries the folded domain guides and
frame presets (155 KB to 1.08 MB in git). Budgets are the CI-measured size plus 5%:
packed 7526634, unpacked 22593213.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* test: keep repo-sweep guards meaningful after the workflow skills left
The last shell ffprobe caller and most root index.html examples lived in retired
skills. The shell detector is now pinned on a literal command line, and the
structure-rule sweep needs more than 5 roots (11 remain) rather than 30.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): slim figma, slideshow and remotion to the Studio shape; restore the storyboard board
slideshow 33.5 KB to 4.9, figma 18.2 to 6.2, remotion-to-hyperframes 11.0 to
4.9, each keeping the facts only it holds (the figma motion helpers, verify gate,
storyboard decoding and usage beacons; present and hand-off; the Remotion lint,
SSIM check and API map). The board page format from the storyboard recipe comes
back as hyperframes/references/storyboard.md: the desktop app's Storyboard tab
reads boards/storyboard.html by its frame, title and time classes. The entry and
the init template now say to snapshot the moments an edit changed before
replying, which the terminal eval found skipped in 22 of 38 runs.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): manifest without local bytecode; Studio's edit prompt names kept files
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): render when the person asks for the file or for no stops, not only after approval
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): keep the voiceover carve in media-use; presets stage their own fonts
Review follow-ups on #5651:
- carve.mjs and its tests move to skills/media-use/audio/scripts; the audio
docs, mixing.md and two Studio comments point there.
- code-editorial's FRAME.md says to copy its bundled WOFF2s and add the
@font-face blocks, instead of promising the retired build-frame.mjs.
- media-use states the host rule before the HeyGen sign-in steps.
- storyboard-format marks transition_in as a note the agent builds itself.
- Two stale citations (creator-editing-recipes.md, sub-compositions.md).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* chore(skills): regenerate the manifest without local bytecode
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): the CLI render step follows step 4's rule, not approval alone
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(ci): run the core-skills check from lint again after the main merge
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): films that tell a story start from three storylines; maps use real imagery
Opus 5.5 arm D read motion.md and applied it, but its launch film was a
feature list (pain, three feature cards, proof, logo): film.md left story
to the model. And the map case never opened film.md, so it drew Natural
Earth outlines instead of baking satellite tiles.
- references/story.md: the generic half of Studio's moment-film story and
craft (one thing, three storylines with world and device, the hook,
beats, worlds, copy, brand, tells of a generated film). The person picks
a storyline, or the agent takes its recommendation when asked for the
file or for no stops.
- The entry's work loop names the storyline step for films over ~15 s; the
references table routes stories to story.md and maps to film.md.
- film.md points at story.md and gives maps and real places a section.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): story.md follows the entry: no voiceover unless asked
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): bake-basemap starts from a globe and stops waiting out its idle timeout
The Opus 5.5 map run spent 13 of its 38 minutes on parallel bakes that
stalled and 15 more recording 300 frames, after rewriting the script because
it could only start on a flat map.
- PROJECTION=globe with a seeded starfield and atmosphere, and FROM/PAN to
turn the globe to CENTER before the dive.
- Each frame polls for loaded tiles instead of waiting for an "idle" event
that had often already fired: 30 frames went from 198-219 s to 10-13 s
locally with byte-identical frames.
- Progress prints seconds a frame and minutes left; film.md shows the globe
call and says to run one bake at a time.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): render in the foreground; wait on a detached render's log, never pgrep -f
Both Opus 5.5 explainer runs started a detached render, then waited with
`until ! pgrep -f "hyperframes render"`, which matches its own loop: each
render took 88-117 s and the wait sat for the tool's full 10 minutes.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): route each kind of film; storylines carry look and sound; add review and sound
The entry routes by request (launch, explainer, music, data, vertical, 3D,
character) to a self-contained file under references/types/, and a film
over ~15 s now gets music and sounds on its visible actions unless the
person asked for silence. Each storyline names its look and its sound, so
picking one picks both; STORYBOARD.md frames carry `reads` and `sound`.
review.md is the whole-film pass: the check warnings, the review sheets,
seven questions to look for, P0/P1/P2 notes and REVIEW.md. motion.md gains
eases by role, six title entrances, a reading-time rule and nine measured
transitions; look.md a design plan before the first scene, with presets
kept for decks and named picks. story.md adds the second default that
generated design falls into, with what to do instead.
The blank template and format.md no longer teach the fade-and-slide-up
entrance on a dark canvas.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(cli): check warns on unread lines, dead stretches, small type, empty frame 0 and silence
A coding agent cannot watch its film, so check now measures what a viewer
notices over time. A new `craft` section holds warnings only (exit 0
unless --strict), sampled on the dense 8 fps grid the overlap pass
already seeks, skipped for --range checks:
- line_unread: a reading-size line (>= 30 px tall at 1080) on screen
under 0.4 s for 1-2 words, else under 3/4 of 0.5 s + 0.3 s a word;
the film's last line needs 2 s. Short lines are re-measured between
samples to ~0.01 s before judging. Captions-track and
data-layout-ignore text are exempt.
- dead_stretch: more than 3 s where the keepsMoving liveness signature
does not change, outside the final 3 s and any data-hold element;
quiet when sweep_static fires or a whole-composition keepsMoving
assertion owns the limit.
- text_below_floor: text under 2.6% of the short side (28 px on 1080)
held 0.5 s, one finding per file listing every element.
- first_frame_empty: frame 0 paints only the background.
- film_silent: over 15 s with no unmuted audio or audible video.
Each message names the fix and the skill reference to read. keepsMoving
now also leaves the film's last 3 s (a still end card) out of its
static runs, so the two agree.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(cli): snapshot --review captures a beat sheet, seam strips and a phone sheet
snapshot --review picks the frames that show a film over time instead of
evenly spaced ones, in the same single browser session:
- review-beats.jpg: one settled frame per scene at its start + 0.3 s,
plus one per timed data-beat="name" element, labelled time and id.
Scenes are the composition's top-level timed clips and sub-composition
hosts, read like `timeline` reads rows (captions and audio excluded)
and timed by the runtime's start resolver over the live page.
- review-seam-NN.jpg: frames at -0.2, -0.1, 0, +0.1, +0.2 s around
every cut (each scene start, and any scene end no scene starts at).
- review-phone.jpg: the beat frames at 360 px wide.
--composition scopes the review to one sub-composition; with fewer than
two scenes the beats spread evenly and a note says so. snapshot also
gains --json: one envelope with every frame's path and time and, under
--review, the scenes, beats and seams behind the sheets; progress moves
to stderr.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(cli): craft warnings stay out of --strict; a hold gets a real next action, not a caret
Craft findings (unread lines, dead stretches, small type, an empty first
frame, silence) are judgment calls a film may break on purpose, so
--strict keeps gating defects only. The check reference no longer
suggests a blinking caret to keep a still frame moving.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(cli): review spreads beats when every scene starts together; map credits skip the type floor
A map film whose basemap and overlay both start at 0 s got one beat
frame; the even spread now keys on distinct scene starts. film.md tells
agents to mark the imagery credit data-layout-ignore and back it, since
the new type floor flagged it on the first real run.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(cli): review frames each scene at its middle too, not only 0.3 s in
On the first real explainer, 0.3 s into a scene showed a bare colour
field before its title entered. Each scene longer than about a second
and a half now adds a frame at its middle, so the sheet shows what the
scene builds.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(skills): a film is built from a numeric SPEC.md, with defaults banned by name and a look test
Studied in full: flxrnc's Motion Lab (vague vs directed prompt), 0xMovez's
course, EianLu's riso skill, agentchengfeng's style samples and the two
Opus 5.5 guides. Their common point: adjectives are where the default look
lives, so the agent now writes SPEC.md before any scene (GOAL, OUTPUT,
TIME, LOOK, MOTION, SHOTS, BANNED, QA), with a number for every adjective.
spec.md bans the defaults by name, unless the brand or reference uses
them (a dark void with small things floating, glow and particles, the
cream-serif-mono-label look, fade-and-slide-up, corner brackets), and
grows that list after the first render. Each storyline gets a 3 s test of
its hero shot before the pick; a look is written as the rules of one
medium. Composition numbers: the hero fills 40% of the frame, one hero
move per shot, the shot's information in within 2.5 s then a held poster.
motion.md adds springs by damping ratio, shorter exits, overlap, stagger
and the beat grid; review.md reviews as a harsh director and grows BANNED;
vertical.md takes the riso skill's measured safe band; explainer.md the
shapes of information.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): story before look; every object reads as itself; posters only for info cards
The first spec-driven C02 swapped the dark default for a flat Swiss
poster, and the story went with it: two black bars nobody read as mirrors,
slogans instead of cause and effect, a storyline picked for its picture.
The spec now serves the story: a storyline is picked for the story a
stranger would follow, the look test asks first whether a stranger
understands what they see, and SPEC.md gains an OBJECTS line giving each
thing the material and details that make it read without a label. The
2.5 s held-poster rule is limited to information cards; in a story film
every shot causes the next. Explainers start from a person or situation
the viewer knows. Review names every object as a stranger would and
treats one that needs explaining as a P0.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(skills): storylines are three films in words, each with a device and a form
The three storylines are pitched as text and the person picks from them;
nothing is built for a storyline before the pick, so the 3 s hero-shot
look test is gone. Ideas pair a device with a form, five or more first,
keeping the three that differ most, and the one stop states the rest in
an assumption line that names every paid item beside its free option.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* ci: list main's new embedded-captions hf-cli test among the retired workflow files
The merge with main removed it with the rest of the retired skill, and the
deletion guard rejects any removal it has not been told about.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(core): keep the audio preset comment within core's size budget
The comment's new citation to media-use's mixing reference made the published
package 14 bytes larger than its budget, which sits at main's exact size.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(cli): craft keeps its own 8 fps grid; comments back within the checks
Review on #5651 found that the merge moved craft onto the overlap pass's
times, which main caps at 180, so a brief line in a long film fell between
samples and line_unread missed it. Craft now builds its own grid at 8 fps up to
600 samples, as before the merge, and a 60 s film with a line shown for 0.2 s
pins it.
The Comments check passes again: REVIEW.md and STORYLINES.md join the files a
skill writes into a project, the comment lines this branch added come back
under each file's share at the merge-base, and the audio preset comment drops
a word the check reads as history.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* fix(core): color grading applies to canvas compositions
data-color-grading on a <canvas> was ignored by the runtime and refused by
lint, the Studio panel and the CLI writer. One source-tag list in the grading
contract now feeds all of them. A canvas is sized from its drawing buffer and
re-uploaded on every seek and transport tick.
* fix(core): keep the comment share of grading files at the base
* fix(cli): timeline lists clips nested in a timed element and lint flags ones that never show
* docs(lint): wrap the nested-clip entries
* docs(skills): format the nested-clip note and refresh the skills manifest
* fix(cli): keep timeline edits from colliding with a clip's own wrapper
* fix(cli): cut clips nested in a wrapper at their sub-composition's in-point
* refactor(lint): split the nested-clip visibility checks to keep the audit green
* style(cli): restore the timeline test's formatting
* docs(lint): add a reference page for every lint finding code
docs/reference/lint-rules.mdx lists every code emitted by the linter
(132: the 121 rule codes in packages/lint/src/rules/*.ts plus the 11
project-level probes that run as part of a project lint) with its
severity, what it catches, and how to fix it, grouped by the rule file
the code comes from. Conditional severities (Studio-host structure
checks, GSAP seek-order hazards) say when they escalate.
Link it from docs/packages/lint.mdx and add it to the Composition
reference group in docs.json.
Issue: #5385
* docs(lint): document the color grading codes and correct four entries
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: James <james.russo@heygen.com>
Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
* feat(audio): composition master bus (data-fx-chain on the root)
A clip can belong to only one audio group, so there was no way to put one
effect, such as a limiter, across the whole mix. The data-fx-chain on the
top-level composition root now runs once over the sum of every clip and every
group, after each group's own chain and fader. No new attribute: a sub-composition
root's data-fx-chain was never applied to anything and still is not.
Render: when a master chain exists, mixAudioTracks writes a float WAV instead
of AAC, applyAudioFxChain runs the chain over it, and ffmpeg encodes AAC last,
so the chain reads unclipped samples. An unreadable chain is a mix failure, as
for a group. Preview: the transport splices the chain between the clips' sum and
the monitor, re-anchored per play generation and watched for edits.
Only the top-level root is read. No master automation: the root's data-automation
is not read as the bus's. No lint rule: data-fx-chain is valid on clips, groups
and roots, and the one place it does nothing (a sub-composition root) has always
been silent.
— Jerrai
* fix(core): preview routes every audible video through the master bus
A root data-fx-chain is attached only inside the Web Audio graph, but a plainly
audible <video> joined that graph only for its own chain, group, automation or a
volume over 1. So preview limited the music and left the talking head dry, and a
composition whose only audio is video got no master chain at all, while export
sums every audible element into the master. A master chain on the top-level
composition root is now a reason to join, the same as a video's own chain.
Elements under a root with no chain keep native output. Sub-composition roots
are still ignored.
— Jerrai
* fix(audio): master bus review round 2 (temp dir, tests, docs, Studio meter)
- audioMixer: a fatal FX error in the master pass or a group bus left the
work directory (the full float sum, about 1.4 GB an hour) on disk. The
final mix now runs in try/finally and the group rethrow removes it first.
- Tests: the "once over the sum" case now uses a limiter then a gain, so a
per-clip chain (-10.4) and a doubled one (-18) both fail it; a new case
proves the sum stays float until the chain reads it; the fader case uses
a group volume of 0.5 so the fader's position is exercised; the work-dir
removal is covered for both paths.
- Docs: "Three rules exist" (the master-bus lint rule is gone), a bad master
chain stops the render with audio_processing_failed, a sub-composition
file opened on its own has its root chain as the master bus, and a seek
clears a group or master limiter.
- Studio: TimelineElement.masterChain carries the root's data-fx-chain, so
the program meter shows for a video-only composition whose only audio
routing is the master chain, as preview now plays it.
- Comment blocks over four lines cut; webAudioTransport.setRate split so
its CRAP score is under the Fallow threshold.
— Jerrai
* fix(audio): master chain reaches tracks the render adds; honest plain-limiter copy
- Master chain: it was carried on each parsed AudioElement, so a track the
producer adds itself (appendAutoDetectedVideoAudio, the browser-discovered
audio in probeStage) never had it, and a composition whose only audio was
such a track exported with no master chain, no ceiling and no warning. It is
now a composition property: parseMasterFxChain(html) at compile, carried on
CompiledComposition and CompositionMetadata, passed to processCompositionAudio
by runAudioStage (in-process and distributed plan). AudioElement.masterFxChain
is removed so there is one source. Each forward (compile stage, local
orchestrator, distributed plan) has a test that fails when it is dropped.
- Plain limiter: it follows the level with no lookahead and Level after is
applied past the ceiling, so it cannot promise "nothing gets past" or "never
clips". Studio copy (description, panel text, knob label, summary) and the
hyperframes-audio skill now say a fast or inter-sample peak can pass it and
point to the true-peak limiter for a delivery limit. A copy test guards it.
— Jerrai
* fix(producer): keep master bus comments within the ratchet; run the plan test with the ffmpeg tests
Drop three one-line field comments that raised their files' comment share,
and list plan.masterBus.test.ts with the integration tests because plan()
reads the ffmpeg version.
— Jerrai
* chore(ci): repin the producer test-classification source in the reachability map
The reachability map pins the hash of test-classification.mjs, which now
lists one more integration test. The map's producer lane command already
covers every test under src, in both the unit and integration matrix lanes.
— Jerrai
* feat(core): add a lookahead true-peak limiter FX (truepeak)
The existing limiter is an envelope follower with no lookahead and no
inter-sample detection, so a -14 dB ceiling can leave the true peak several dB
over. truepeak estimates the true peak on a 4x polyphase interpolator, takes the
minimum required gain over a lookahead window and smooths it with a boxcar of
the same length, so the gain is already down when the peak leaves the delay
line. Release is exponential and can only lower the gain further; channels
share one gain.
The offline render lengthens the OfflineAudioContext by the chain's latency and
drops the lead-in, so a limited clip stays sample-aligned with its source.
Preview plays the lookahead (about 3.3 ms at the default).
— Jerrai
* docs(audio): truepeak ceiling is a 4x estimate; measure it with an ideal interpolator
The unit test's meter was a 96-tap Kaiser sinc, which rolls off near Nyquist and
reads full-band noise about 0.5 dB low, so the PR reported a 0.3 dB broadband
overshoot. Against an ideal 16x interpolation (zero-padded FFT, cross-checked with
a 16x soxr resample) hot full-band white noise ends 1.2 to 1.7 dB over the ceiling
(median 1.4 over 28 runs of 10 to 30 s). ffmpeg's ebur128 true peak is also a 4x
meter and reads the same files 0.1 dB over.
- The test meter is now the FFT interpolation. Tolerances are what it measures on
each fixed signal: tones 0.01 dB (they land on the ceiling), the dense program
0.5 dB (reads 0.445, the old 0.4 passed only because the meter read low), and a
new full-band noise case at -1, -6 and -14 dBTP with 1.35 dB (reads 1.09 to 1.31).
- audio-effects.mdx and the hyperframes-audio skill say the ceiling is a 4x
estimate, give the measured overshoot and recommend a 2 dB margin under a hard
delivery limit.
- skills-manifest.json regenerated.
— Jerrai
* fix(core): truepeak UI copy no longer promises a hard ceiling
The registry description and the rack summary said the true peak is never above
the ceiling. The limiter holds a 4x estimate, and full-band noise can land up to
about 1.7 dB above it, as the docs now say. The summary reads "held near", the
description names the estimate and the overshoot, and the rack blurb says "holds
... to a ceiling". No skill file changed, so the skills manifest is unchanged.
— Jerrai
* fix(core): Studio truepeak copy states the 4x-estimate margin
The ceiling control was labelled "Never exceed" and the module said the mix
"must not clip", so a Studio user never saw that dense full-band content can end
up to about 1.7 dB above the ceiling. The label is now "Target ceiling" with a
hint that names the 4x estimate and the headroom to leave, the blurb says
"toward a target ceiling", the rack summary says peaks are pulled down toward the
value, and the registry hint no longer says "highest true peak allowed". The
audio skill's "hard dBTP ceiling" wording is gone and the skills manifest is
regenerated. A copy test keeps the promise out.
— Jerrai
* fix(core): truepeak clears on a seek, and the review nits (fallow, comments)
- Unexport TRUE_PEAK_OVERSAMPLE, TRUE_PEAK_DETECTOR_DELAY and
truePeakLookaheadSamples: nothing imports them (Fallow audit).
- A persistent group bus keeps its chain across a seek, so the limiter's
delay line and held gain carried over. The worklet takes __hfReset, the
graph exposes FxChainHandle.reset(), and reanchor() calls it.
- The processor-loading harness is shared by the truepeak and worklet tests
(it was a 12-line clone); the test FFT no longer repeats audioCarve's
bit-reversal; two test bodies are under the CRAP threshold.
- Comment blocks cut to four lines or fewer (Comments check).
- Docs state the preview delay in ms.
— Jerrai
* docs: clarify async font measurement and timeline registration
* chore: align skill manifest with main before regeneration
* chore: regenerate animation skill manifest
* fix(core): write only authored hue curves, so a single hue curve passes lint
* fix(cli): apply over a grading saved with empty hue curves instead of refusing it
* fix(core): read grading properties from computed style, and stop advising an inline start
* fix(cli): preserve validation during legacy hue repair
* fix(cli): preview grading writes without apply
* feat(core): add isAudibleVideoElement predicate and audible media selector
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(runtime): route processed audible videos through web audio in preview
An audible <video> joins the Web Audio schedule, hidden-toggle and
group-capture passes when it needs a gain el.volume cannot express: a
boost above unity, an fx chain, automation, or an audio group. A plain
audible video at unity stays on native output. The clock master stays
audio-only; a video whose capture fails stays on native output (never
decoded, never failed closed).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(audio): let audible videos join audio groups in preview and render
resolveAudioGroups, audioGroupOf, group render ids, the engine mixer and
the audio_group_no_members lint rule accept an audible <video>. A hidden
group drops its video members from the mix; muted videos stay inert.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(editing): offer the audio fx section on audible videos
EditableElementFacts gains hasAudio; studio and sdk derive it from muted and data-has-audio.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(studio): show audio meters when a project has an audible video
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(studio): offer audible videos as carve voices
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(studio): let audible video clips join audio groups
Drops the video refusal; grouping and group audition count audible videos.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(engine): honor hidden audio groups for auto-detected video audio
Muted videos that declare data-has-audio are no longer mixed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): keep authored src, loop and honest status when keeping cutout sound
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(core): treat only data-has-audio=true as audible in runtime and lint
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* refactor(core): trim the web audio route and group-key comments
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(runtime): capture ramped clips so a group's bus carries them in preview
A rate lane skipped Web Audio entirely, so a ramped video or audio clip in a
group played native output without the group's fader, mute or FX while the
export applied them. Only the decoded-buffer fallback cannot follow a rate
curve; the media-element capture can, so the skip now guards that fallback.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): show meters only for videos Web Audio carries
A plain audible video at unity stays on native output, which the meters
cannot read, so it no longer advertises them. The runtime's join rule and the
meter gate now share audibleVideoNeedsWebAudio (core/audible-video).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
* feat(cli): one owner for init media placeholders, audio stays on the video
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* feat(cli): init keeps a video's sound on the clip; silent files scaffold muted
Supersedes the patchVideoSrc changes in #3977 and #3942 and carries their tests.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: miga-heygen <miga-heygen@users.noreply.github.com>
Co-Authored-By: kapelame <kapelame@users.noreply.github.com>
* feat(registry): example templates keep the a-roll's sound on the video
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(lint): video audio rules recommend keeping sound on the video
Update video_missing_muted and video_audio_double_source message and
fixHint text to recommend the new default: keep audio on the video with
data-has-audio="true" (not muted). Tests verify the new wording is in place.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(parsers): a video is either audible (data-has-audio) or muted, never both
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): follow the compiler's audio rule in the audio-track toggle
Confirm before background removal drops a video's sound.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* docs(skills): hyperframes-core teaches sound on the video by default
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* docs(skills): workflows and scaffold guidance keep a video's sound on the clip
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* docs: footage with sound keeps it on the video clip
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(cli): init from-file a-roll is timed, muted strip is attribute-exact
The from-file a-roll video gets data-start="0" so a scaffold lints clean, and
the orphaned audio-only slot comment is dropped. setVideoAudio now walks the
tag attribute by attribute, so a class value containing the word muted
survives. The ffprobe-missing warning says the video is assumed to have sound
and how to switch to muted, and DEFAULT_META notes the failure surfaces at
render until lint support lands.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): keep has-audio in step with the muted toggle, test cutout confirm
Muting a video now clears has-audio and unmuting sets it to true, in both the
Design and flat media panels, matching the Has audio track toggle. Audio
elements are unchanged. Adds coverage for both panels plus the cutout
window.confirm guard: declined leaves src alone, accepted swaps src and mutes,
a silent video never prompts.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(parsers): updateElementInHtml hasAudio only applies to videos, true or false
An audio element or an undefined hasAudio no longer picks up a muted attribute;
only an explicit false on a video writes muted.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* docs: video_missing_muted rule text, silent-footage notes, consistent audible examples
lint.mdx and cli.mdx describe the current video_missing_muted rule instead of
the retired unmuted-video wording. The editing recipes say how to adapt for
silent footage and require the outgoing clip's sound to end at a J-cut. The
Remotion media example shows the audible mapping consistently, data-attributes
states that has-audio is required unless muted, and the hairline frame note no
longer claims the video is muted.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(cli): encode init media filenames and probe --audio duration
Function replacers stop dollar-sign pattern expansion in filenames; src is percent-encoded.
--audio now passes the probed track length as the composition duration in both init paths.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(lint): audio-state-aware media rules and time-aware double-source check
video_missing_muted honors any explicit data-has-audio.
video_audio_double_source only considers audible videos and only fires
when the same-src clips overlap in time.
duplicate_audio_track now covers audible videos.
audio_file_without_element no longer claims silence when an audible video
carries the sound.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* docs(skills): audio-stream check for remotion ports, followable J-cut recipe
Remotion Video maps to data-has-audio only when the file has an audio stream.
The J/L-cut recipe now shows both shots with muted pictures and separate audio.
embedded-captions removes the audio.mp3 scratch file it extracts.
skills-manifest.json regenerated.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* refactor(lint): trim comments to satisfy the comment ratchet
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): atomic muted edits, cutout keeps sound on a linked audio
Muted and Has audio track commit one batched write (one persist, one
undo entry) and remove data-has-audio instead of writing an empty
marker. Unmuting a video probes its src: audible -> true, silent ->
false, probe failed -> absent. Remove background on an audible video
inserts a linked sibling <audio> with the original sound in the same
write, replacing the drop-the-sound confirm.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(producer): skip hidden videos when auto-adding video audio
A video hidden in Studio is dropped by the mixer, so its src never reached
existingAudioSrcs and the render re-added it at full volume. The video parser
now records the shared hidden predicate and the auto-detect step skips hidden
videos.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* fix(studio): keep useDomEditSession under the 600-line cap
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: miga-heygen <miga-heygen@users.noreply.github.com>
Co-authored-by: kapelame <kapelame@users.noreply.github.com>
The attribute is in the HTML schema reference and enforced by the missing_data_no_timeline lint rule, but no page said what omitting it costs: a composition that never registers a GSAP timeline waits out player-ready-timeout (45 s by default) on every render.
That matters for triage because it is a fixed cost. "The render is slow" currently lists only causes that scale with the project - draft quality, media size, filter complexity - so an author whose renders are uniformly 45 s long reads the section, tunes the things it names, and sees no change.
- troubleshooting: add a symptom-keyed entry above "The render is slow", and point that section at it for the constant-penalty case.
- html-schema: give the attribute row the consequence and the lint code.
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
* feat(studio): typed audio values, clip fades, audible video drops
Audio rows in the media inspector (Volume, Speed, Media start) take a
typed value: click the readout, type "-6 dB", "1.5x" or "2.5s", Enter.
Speed presets are hidden on <audio> clips.
Clip-edge fades: data-fade-in / data-fade-out in seconds, honoured by the
preview runtime (per-tick gain), the render mixer (afade after volume) and
Studio (Fade in / Fade out rows, and drag dots at the top corners of audio
clips and audible videos). Linear on both sides so preview and render
agree; fades that outrun the clip scale to meet inside it.
Dropped videos with an audio stream now land with data-has-audio="true"
instead of muted, so the mixer keeps their sound. The media metadata
endpoint reports hasAudio from the ffprobe call it already makes.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* fix(audio): one owner for fades, dB, and afade-after-volume
Illegal fade values become no-fade at fadeGain; typed inspector input
still returns null so the readout stays red. Master and group mixes
share one filter chain with volume then afade. Fade-out stays anchored
to the trimmed clip end.
* fix(studio): share audio helpers and bound typed media values
* fix(studio): reserve sibling fade duration when editing
---------
Co-authored-by: Jake Moran <jakemoran2011@gmail.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Co-authored-by: Miguel Angel Simon Sierra <miguel.sierra@heygen.com>
* feat(studio): edit a clip's speed ramp with a rate lane and presets
* fix(studio): keep the live preview attribute in sync with what gets persisted
* fix(cli): snapshot picks the source frame through a rate lane and up to 10x
hyperframes snapshot clamped the constant playback rate at 5 and ignored a
rate lane in data-automation, so a sped-up or ramped clip showed the wrong
frame. It now reads the rate through the runtime's own reader and maps time
with the shared source-time function.
* docs(skills): teach speed ramps as a rate lane in one reference page
Adds the speed-ramps reference, corrects the 0.1 to 5 rate range to 0.1 to 10
and the 'speed ramps are not supported' lines in the skills, and regenerates
the skills manifest.
* docs(skills): say what fixes a ramped clip's length and how the render approximates pitch
* fix(studio): hide the speed preset until the clip has a known duration
A preset on a clip with no data-duration was stretched over a made-up one
second. The panel now offers presets only when the duration is known.
* docs(skills): fix the last stale ramp line in the editing recipes and the slice-cap wording
A new resolver in @hyperframes/parsers decides how long a video, audio or image
occupies the timeline. The core runtime start resolver, clip manifest and clip
tree now read length through it. An image with data-start and no data-duration
gets the dropped-image default of 3 seconds; a bare image stays a static layer.
Video and audio take their length from the file until an authored duration trims it.
The playback rate bound (0.1 to 10) now lives in parsers, and core re-exports it.
A rate lane keeps its own arithmetic in core.
The lint rule that asked images for data-duration is removed, and the docs no
longer say an image requires it.
The runtime absorbed a series of authoring mistakes over time and `runtime/init.ts`
says so in its own comments, but the skills kept teaching the old rules. Four of
them actively cost an agent a failing run: add `crossorigin` (lint rejects it
unconditionally), never build a timeline inside `async` (lint calls that the
documented contract), never `gsap.set` later-scene clips (two fixHints instruct
exactly that), and 12 copyable media snippets with no `id`, which render silent.
Corrected in every place each claim appeared, including `hyperframes-animation`,
three workflow scripts, the scaffolded project instructions, the CLI `docs`
command, and the public docs site: `data-track-index` is a Studio display lane
the render never reads, `class="clip"` is a layout convention rather than a
visibility requirement, timed elements may nest, the visibility window is
half-open, sub-composition host dimensions are backfilled, and the root-fill rule
applies only to the layered-composite path.
Behaviour changes, each backed by a render rather than by reading code:
- `timeline_registry_missing_init` deleted. The runtime creates the registry
before any inline script; a composition without the guard line renders and
animates correctly.
- `video_nested_in_timed_element` kept, message corrected. A rendered repro shows
the nested-with-local-start case really does break, so the rule guards a real
defect, but nothing is "FROZEN": the extractor ignores the wrapper's offset
while visibility uses it, so the clip shows wrong frames and then vanishes.
- `mediaRenderIds` now stamps media whose source is a `<source>` child, closing a
duplicate-id gap the old `[src]`-only selector left open.
- Stale messages fixed on `subcomposition_root_styled_by_class` and
`deprecated_data_layer`.
`coreSkillContent.test.ts` pinned the literal sentence that made root
`data-start` look required, so it is narrowed to structure plus the regression it
genuinely catches.
Not covered, and flagged in the PR: the media global-vs-local start heuristic in
`runtime/init.ts` is the root cause behind the nested-video defect. Removing it
changes the meaning of existing compositions and needs its own deprecation.
* docs(audio): document the audio effects system
The effects feature had no documentation at all — the only mentions anywhere in
docs/ were changelog entries. This adds the three pages the color-grading feature
already has, one per audience, and closes a gap in the existing audio guide.
- prompting/audio-effects — a new Level 5 chapter on asking for a mix in
symptoms rather than in filters, with the voiceover carve as the headline, the
level-before-depth check, groups, and the three requests that have no honest
answer (de-essing, noise removal, tone matching).
- studio/audio-effects — the rack, presets by symptom, the carve module, groups,
the deliberately asymmetric mute/solo, automation lanes, and troubleshooting.
- reference/audio-effects — the contract: all four attributes, every effect and
parameter range, why some parameters cannot be automated, the 19 presets, the
five jobs and five one-knob profiles, carve semantics, the group model, the
render bus, preview/render parity, and the three lint rules.
Also points the existing "duck music under important speech" advice in
guides/voice-and-audio at the carve, which does that properly and was never
named there.
Facts verified against source rather than the shipped skill prose: the panel
section is "Audio FX" (the neighbouring "Effects" section is visual effects, and
an earlier draft of this page named the wrong one), MAX_AUTOMATION_POINTS is 512,
fromPreset carries a preset id rather than a boolean, the leveller targets the
track's own 80th percentile, group mute reaches the render while solo never
leaves Studio, and the CLI carve currently writes clip ids.
No screenshots in this pass, and no placeholders for them either — the pages
carry concrete markup and tables instead. Screenshots of the rack, the carve
module, and a group row would each earn their place later.
mint validate and mint broken-links both pass.
* docs(audio): give audio its own Studio group, split by task
Review feedback: the audio page did not belong in Studio / Edit. That group is
already one task per page — canvas, timeline, animation, captions — and a single
page covering the rack, the carve, groups, and automation lanes was four tasks
bundled together and dropped in beside them.
Studio now has an Audio group holding four task pages:
- Effects and presets — the rack, presets by symptom, adding single effects in a
working order, the one-knob controls, Even Out Levels
- Voiceover carve — its own page, because it is the feature people come for
- Groups, mute, and solo — including why mute reaches the export and solo cannot
- Automation lanes — drawing envelopes, the shape menu, and which parameters
cannot move at all
Not a new top-level tab: the tabs here are audience-scoped (Guides, Studio,
Catalog, Developers), so a feature tab would be the only one of its kind and
would strand the prompting chapter out of its Level 5 sequence and the reference
page out of Developers.
Repointed the deep link in guides/voice-and-audio at the carve's own page.
Lane interactions verified in source before documenting: the right-click menu
offers Ramp up, Ramp down, Swell, Dip, and Simplify (which needs three points).
Deliberately not documented: "clicking a lane label reveals it in the rack",
which is not on main.
mint validate and mint broken-links both pass.
* docs(audio): fix the four review blockers
All four verified in source before fixing; the review was right on every count.
**The registry was incomplete.** `pitchshift` ships at `audioFx.ts:509-535`
(`semitones` −12–12, `mix` 0–1, worklet-backed so neither automatable) and was
missing entirely — sixteen effects, not fifteen. It also joins the worklet list,
so five effects expose no automatable parameters rather than four.
**Three presets were missing.** `chipmunk`, `giant`, and `monster` ship at
`audioFxPresets.ts:336-357`, all built on `pitchshift`. Twenty-two presets, and
Character holds ten. Fixed in both the reference table and the Studio list.
**The copyable markup contradicted the warning above it.** The page said
`carve.mjs` only finds double-quoted attributes and then gave three
single-quoted examples — copying the chain example would make a later carve miss
the existing chain and overwrite it. All three are now double-quoted with
`"`, each followed by its unescaped reading so it stays legible.
**The attribute table over-claimed.** `data-audio-group` is a plain id, not JSON,
and is ignored on `<video>`; the other three also live on `<hf-audio-group>` for
a group. The table now carries shape and valid host per attribute.
**The automation contract was wrong on two axes.** A clip lane's `t` is
clip-relative but a GROUP lane's is composition time, because a group has no
`data-start` (`webAudioTransport.ts:337-342`, `audioMixer.ts:1311-1344`) — both
pages now split the two clocks. And `volume` is not 0–1: the ceiling is
`MAX_AUDIO_GAIN`, +12 dB or about 3.981 (`audioGain.ts:8-9`), so a boosting lane
is valid and documented.
**Current-main drift.** #3416 is merged, so the CLI now records the voices'
shared group when it is safe and falls back to clip ids when that group contains
the bed or a music/SFX member. Documented, including why neither refusal shows
up on the run that writes it, and rebased onto main.
mint validate and mint broken-links both pass.
* docs(audio): name the real add-menu family, and finish propagating pitchshift
Second review round. All three findings were my own incomplete propagation — I
corrected the reference for `pitchshift` last round and left the reader-facing
pages behind it.
**The add-menu family is `Time`, not `Space`.** `propertyPanelFxAddMenu.tsx:22-28`
labels the four groups Filters / Dynamics / Non-linear / Time, and the time group
holds pitchshift, delay, chorus, phaser, and reverb. The Studio page sent readers
looking for a group that does not exist. It is now a table naming the family and
its contents, and the reference's "Time — space and width" heading is retitled,
since that description stopped covering the family the moment pitch shift joined
it.
Also from the same file: the menu offers the named jobs in place of a bare
`peaking`, because picking `peaking` is picking a machine and leaving the real
decision — which range — for afterwards. Worth saying on the task page.
**Pitch shift was missing from both no-automation lists** that a reader actually
follows — `studio/audio-automation` and, unflagged but the same defect, the
prompting chapter. Five worklet effects in all four places now. Called out
explicitly on the Studio page, because a rising pitch is exactly the thing
someone reaches for a lane to do, and the lane will not report that it cannot.
**Narrowed the group-metadata sentence.** "The other three are JSON, and on a
group they live on `<hf-audio-group>`" swept in `data-fx-carve`, contradicting the
table directly above it. Only `data-fx-chain` and `data-automation` are group
metadata.
mint validate and mint broken-links both pass.
- html-schema: the previous clause claimed a composition host's data-media-start is
never read. It is: readElementPlaybackStart (media.ts:16) resolves
data-playback-start ?? data-media-start and timeline.ts calls it on composition
clips. Rewrote to the accurate reason both reviewers gave — composition hosts are
only inspected by the playback-start-first readers, media-start works as a
fallback, but playback-start is what Studio writes/normalises to.
- motion test: pin the HoverVideo click-suppression (preventDefault +
stopPropagation). Removing it left the gate 12/12; now it fails. This is the bug
that escaped static review and only surfaced by driving the live preview.
- replica-compare: fold the visible 'Sound off/on' text into the aria-label so the
accessible name contains it (WCAG 2.5.3, Rames).
Round-5 findings from Magi and Rames.
- replica-compare: the offscreen teardown now resets muted (element + React state),
matching HoverVideo — a pair unmuted before it scrolled away no longer returns
reading 'Sound on' over a paused, sourceless pair (Magi blocker).
- Both controls' aria-labels now follow the mode: under reduced motion the button
plays/pauses the whole comparison, and when a preview is already autoplaying
muted the action is 'unmute', not 'play with sound' (self-review + Rames).
- Hardened the motion-suite assertion to scope 'startBoth' to toggleSound's body
(a defined-but-unused helper no longer satisfies it) and pin the offscreen
muted-reset transition (Rames mutation-test gap).
- html-schema: 'hyperframes validate' inspects <audio> only; note that no
media-start-only reader inspects a composition host, so the kind rule strands
nobody (Rames).
Per Rames: add the engine audio mixer (audioMixer.ts:350 -> ffmpeg -ss) to the
media-start-only readers — it's the live path that makes a lone data-playback-start
a shipped output bug (trimmed picture over untrimmed audio). 'Set one' isn't enough;
give the element-kind rule: <video>/<audio> use data-media-start, nested composition
uses data-playback-start (Studio writes it; it's the child-timeline offset). Also fix
editing-existing-videos.mdx, which offered both names as interchangeable for front
trim of a clip — the exact kind where they aren't.
- replica-compare: the voluntary control now starts and pauses BOTH films (not
just the reference), and the replica-sync effect attaches in view regardless of
the preference, so a reduced-motion visitor who presses play sees the whole
synchronized pair. Added a focused source-level assertion to the motion-check
suite (the repo has no React runtime harness for snippets).
- html-schema: describe each layer precisely instead of grouping the CLI —
timing compiler, HTML parser, producer audio, and 'hyperframes validate' read
only data-media-start; runtime, Studio and 'hyperframes snapshot' read
data-playback-start first (Studio also writes it).
Round-3 findings from Magi.
- edit-operations: dispatch() does not consult can() (session.ts:608 -> applyOp
with no validation; a no-timeline addGsapTween/addLabel is a no-op but a missing
target still writes via selector fallback). Use Rames's wording: call can() first
and skip on failure — no false 'applies nothing' guarantee.
- timing-and-animation: the second E_NO_GSAP_TIMELINE site — gated setGsapTween on
an error it cannot return and called shipped parser code 'a later phase'. Rewrote
to gate addGsapTween (which can return it); dropped the stale can() comment in
types.ts:595.
- html-schema: data-playback-start is read by runtime, Studio and CLI (Studio also
writes it, timelineEditingHelpers.ts); only the compile path is media-start only.
Document the layered precedence instead of calling it runtime-only.
Round-2 findings from Magi (#2/#3/#4) and Rames.
- edit-operations: E_NO_GSAP_TIMELINE is raised only by addGsapTween and addLabel
(mutate.ts:1747), not the set/remove tween ops; drop the false 'dispatch() still
applies structurally' claim (mutate.gsap.test.ts verifies zero patches); add the
requirement to the Labels section where addLabel lives.
- html-schema: data-media-start is read by parser + timing compiler + runtime;
data-playback-start is a runtime-only alias, so a lone playback-start doesn't
shift trim/split. Document the surfaces instead of claiming one universal value.
- testing-local-changes: bun unlink cleanup used a relative cd that resolves under
the video project; use an absolute checkout path.
Flagged by Magi (P1 #2/#3, P2 #7) and Rames.
**`bun unlink hyperframes` does not exist.** Bun answers "error: bun unlink
{packageName} not implemented yet" — I ran it. The command takes no package name;
it unregisters whatever directory you are standing in. The reader arrives at that
block having just been told to cd into a video project, so even the correct form
would unregister the wrong thing and leave the global link in place — which is
exactly the failure the same page's troubleshooting section then explains. The
page created the bug it diagnosed. Now `cd packages/cli && bun unlink`.
**`data-media-start` and `data-playback-start` are one value, not two features.**
The schema page gave them separate rows with different-sounding meanings, so a
reader would reasonably think they compose. Six read sites in core are all
`playbackStart ?? mediaStart` — runtime/media.ts:18 and :92, runtime/init.ts:751,
1993, 2928, 3010. One row now, alias named, and it says which wins.
**Canary rollouts contradicted itself.** Line 109 called enrolment a pure function
of `(feature, installId, percentage)`; line 195 said canaries bucket on a
dedicated `bucketSeed`, not the telemetry id. The second is right —
cli/src/telemetry/canary.ts:98 is `unitId: config.bucketSeed ?? config.anonymousId`.
Also on the Studio shortcuts page earlier: J/Shift+J for keyframe navigation,
Backspace to delete, and Ctrl+Y for redo were all missing.
Adds the pages the rebuilt navigation is organised around, and moves the sidebar
onto that structure. Every entry points at a file that exists after this commit;
nothing is rewritten or removed yet, and no redirect is claimed yet.
- Studio (13 pages) — the editor had no section of its own
- One guide per creation workflow, matching the shipped agent skills
- Section hubs: Concepts, Catalog, Developers, Deploy, Workflows, Help,
Go further, Product updates, 30 Days of HyperFrames
Pages a later commit retires drop out of the sidebar here but still exist and
still resolve, so the site stays navigable at this commit.
Incidentally fixes a link to /concepts from the Lambda migration guide that is
broken on main today — the destination did not exist.
## Summary
- replace the unsupported `data-var-*` example with the current `data-variable-values` pattern
- document that variable values are carried through but still applied manually inside the nested composition
- add matching reference notes in the data-attributes, HTML schema, core package, and CLI docs
## Verification
- `npx mintlify dev --port 3100`
- browser verification with `agent-browser` on `/concepts/compositions` and `/reference/html-schema`
- proof artifacts saved locally under `tmp/issue-416-docs/`
Major improvements across all 18 pages:
- Use Mintlify components: <Steps> for tutorials, <Tabs> for alternatives,
<CodeGroup> for multi-platform commands, <Tree> for directory structures,
<AccordionGroup> for FAQ/scannable content, <Mermaid> for diagrams
- Add filename annotations to all code blocks (e.g., ```html index.html)
- Add numbered comments inside multi-step code examples
- Show expected terminal output after CLI commands
- Add "When to use" / "When NOT to use" sections to all package pages
- Add "Next Steps" CardGroup to every page (no dead-end pages)
- Cross-link between pages at point of curiosity (not just "see also" dumps)
- Expand thin pages (engine, studio) with architecture details and examples
- Add decision guides (rendering modes, template selection)
- Use <Warning> and <Note> sparingly (max 2-3 per page)
Also adds DOCS_GUIDELINES.md at repo root with writing standards.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
