## Summary
- Split the captions skill from a single 611-line file into focused references: `SKILL.md` (core rules), `transcript-guide.md` (whisper/transcription), `dynamic-techniques.md` (animation patterns)
- Add `audio-reactive` skill with "Content, Not Medium" constraint — steers away from generic visualizations (equalizer bars, spectrum analyzers, waveforms) toward content-grounded animation where audio drives *when* and *how much*, not *what to show*
- Add initial dynamic caption technique selection by energy level
## Test plan
- [ ] All skill files render correctly as markdown
- [ ] Cross-references between files use correct relative paths
- [ ] `audio-reactive/SKILL.md` contains the anti-pattern list and content-grounded examples
🤖 Generated with [Claude Code](https://claude.com/claude-code)
* feat(skills): add gsap-effects skill with typewriter pattern
Distills typewriter text animation into a reusable reference:
basic typewriter, blinking cursor, word rotation, appending words,
and a characters-per-second timing guide. Uses GSAP TextPlugin.
Also references the new skill from compose-video.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(skills): emphasize cursor must always blink when idle and sit flush
Two key rules added to the typewriter skill:
1. Cursor must blink in every idle state (after typing, after clearing,
during hold pauses) — a solid idle cursor looks broken.
2. No whitespace between text and cursor elements in HTML — any gap
between the last character and the caret looks wrong.
Also adds cursor-hide state for multi-line handoffs and updates word
rotation example to include cursor state management.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(skills): backspace must delete from end, not front
TextPlugin's text:{value:""} removes characters from the front,
which looks wrong. Added a backspace helper that steps through
substrings from right to left using tl.call(). Updated word
rotation example to use it.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(skills): handoffs must blink before typing, use margin for spacing
Two lessons from testing:
1. Cursor handoffs need a blink pause — going hide→solid directly
skips the idle state. Pattern: hide→blink→pause→solid→type→blink.
2. Use margin-left on a wrapper span for spacing between static and
dynamic text. Flex gap spaces the cursor away, trailing spaces
collapse.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix(skills): enforce single visible cursor as a hard rule
Only one cursor may be visible at a time. Multiple cursors on
screen looks broken. Every other cursor must be cursor-hide.
Promoted to rule #1 in the cursor section.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add @chenglou/pretext dependency and fitTextFontSize() utility that uses
canvas measureText to compute the largest font size that fits text within
a given width. Replaces character-count heuristics with actual font-aware
measurement.
- New fitTextFontSize() in @hyperframes/core/text, exposed on window.__hyperframes
- Generalized for all text elements (captions, titles, etc.), not just captions
- Unit tests (mocked pretext) + browser integration test (real Chromium canvas)
- Updated captions skill docs with usage, exit guarantee, and self-lint patterns
Co-authored-by: James <james.russo@heygen.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Namespace skill names with `hyperframes-` prefix for clearer identity in
OSS contexts where users may have other skills installed.
Updates skill directories, SKILL.md frontmatter, CLAUDE.md, README.md,
CLI build script, init command, and project template.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Vance Ingalls