* fix(lint): stop CSS comments in <style> from manufacturing phantom root tags
extractOpenTags scans raw source text with a flat regex that has no
concept of <style>/<script> block boundaries, so a CSS comment like
`/* <g> wrapper */` inside a <style> block reads as a real open tag.
findRootTag consumes that flat tag list and only skips tags literally
named script/style/meta/link/title, so the phantom <g> tag (not in
that skip list) wins the "first non-ignored body tag" search and gets
returned as the composition root instead of the real one that follows.
This manufactured root_missing_composition_id and root_missing_dimensions
(the phantom tag has neither) plus head_leaked_text (the leaked-text
scan slices up to the phantom tag's position, landing inside the
<style> block before its real closing tag, so the raw CSS text reads
as leaked markup) on an otherwise valid sub-composition — reported
with an exact bisected repro: a <template>-wrapped SVG sub-composition
whose <style> block comments reference an inner <g> element.
Fix: compute <style>/<script> content spans up front (reusing the
existing extractBlocks + STYLE_BLOCK_PATTERN/SCRIPT_BLOCK_PATTERN) and
skip any TAG_PATTERN match that falls inside one, before it ever
reaches findRootTag or any other extractOpenTags consumer. Same shape
as the prior fix for a leading <svg> defs block being mistaken for the
root (8ee4b7df) — this closes a sibling gap in the same function.
Test: new regression case with a <style> block containing a `/* <g> */`
comment ahead of an <svg data-composition-id> root, asserting none of
the three findings fire. Full lint package suite (318 tests) passes.
* feat(lint): flag duplicate data-composition-id values
Declaring data-composition-id on more than one element (commonly the <meta>
tag from the quickstart template AND the root <div> added to satisfy
root_missing_composition_id) is a silent collision: `compositions --json`
returns two entries for the same id (one duration:0) and inspect/snapshot
crash with "Cannot read properties of undefined (reading totalDuration)".
Lint passed clean through all of it.
New rule `duplicate_composition_id`: group elements by data-composition-id
value and error on any value shared by 2+ elements, naming the id and calling
out the meta-vs-root collision in the fixHint. 3 tests: dup fires, single id
passes, two distinct ids don't collide. (Implemented via Codex; verified
independently: 111 lint tests pass, oxfmt/oxlint clean.)
* fix(audits): avoid caption false positives
* fix(lint): ignore proxy-label tween overlaps
* fix(cli): preserve the five-percent text audit floor
* fix(lint): preserve proxy identity across lexical scopes
* fix(cli): audit only directly painted text
* fix(lint): compare live composition ids canonically
* fix(lint): preserve expanded proxy identities
* fix(cli): measure directly painted text geometry
* fix(lint): preserve first duplicate attribute value
* fix(lint): keep shared proxy identity across helpers
* fix(parsers): preserve expanded proxy identity
* fix(lint): decode composition IDs consistently
hyperframes
CLI for creating, previewing, and rendering HTML video compositions.
Install
npm install -g hyperframes
Or use directly with npx:
npx hyperframes <command>
Requirements: Node.js >= 22, FFmpeg
Commands
init
Scaffold a new Hyperframes project from a template:
npx hyperframes init my-video
cd my-video
preview
Start the live preview studio in your browser:
npx hyperframes preview
# Studio running at http://localhost:3002
npx hyperframes preview --port 4567
render
Render a composition to MP4. Run from the project directory; the positional
argument is the project directory (not a file), so render the project's
index.html directly, or point at a specific composition file with -c:
npx hyperframes render -o output.mp4
npx hyperframes render -c ./my-composition.html -o output.mp4
lint
Validate your Hyperframes HTML:
npx hyperframes lint ./my-composition
npx hyperframes lint ./my-composition --json # JSON output for CI/tooling
npx hyperframes lint ./my-composition --verbose # Include info-level findings
By default only errors and warnings are shown. Use --verbose to also display informational findings (e.g., external script dependency notices). Use --json for machine-readable output with errorCount, warningCount, infoCount, and a findings array.
compositions
List compositions found in the current project:
npx hyperframes compositions
benchmark
Run rendering benchmarks:
npx hyperframes benchmark ./my-composition.html
doctor
Check your environment for required dependencies (Chrome, FFmpeg, Node.js):
npx hyperframes doctor
browser
Manage the bundled Chrome/Chromium installation:
npx hyperframes browser
info
Print version and environment info:
npx hyperframes info
docs
Open the documentation in your browser:
npx hyperframes docs
upgrade
Check for updates and show upgrade instructions:
npx hyperframes upgrade
npx hyperframes upgrade --check --json # machine-readable for agents
Documentation
Full documentation: hyperframes.heygen.com/packages/cli
Related packages
@hyperframes/core— types, parsers, frame adapters@hyperframes/engine— rendering engine@hyperframes/producer— render pipeline@hyperframes/studio— composition editor UI