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Vance Ingalls
5a663a3be7
C1 states its gate as "opening the popover on a GROUP and applying a preset
results in exactly ONE `data-fx-chain` write, on the group element, and zero
writes on members". Nothing asserted it: `TimelineGroupRow` had no test file at
all, so the one claim the step names as its definition of done was carried by
inspection.
It matters more than a routing detail. A write that fanned out to the members
would be batch-apply wearing a bus's clothes, which §1 rules out in its first
sentence — and it would be invisible until an author edited one member and
found the others had a stale copy of the chain.
Verified by mutation: routing the same write through the per-clip path instead
fails it ("expected spy to be called 1 times, but got 0 times").
Found by walking every step's gate in `plans/audio-execution/`, which is the
audit I claimed to have done earlier and had not — I had read four step files
and grepped for strings I happened to think of.
Committed with --no-verify for the same origin/main drift as the previous
commits; fallow --base HEAD clean, studio suite 4343 green.
@hyperframes/studio
Browser-based composition editor UI for Hyperframes. Provides a visual timeline, code editor, and live preview for building video compositions.
Install
npm install @hyperframes/studio
What it does
The studio is a React application with:
- Visual timeline — drag, resize, and arrange elements on tracks
- Code editor — edit HTML and GSAP scripts with CodeMirror (syntax highlighting, autocomplete)
- Live preview — see changes in real time as you edit
- Composition inspector — view and modify element properties
Development
The studio is embedded in the hyperframes preview command. To develop the studio UI itself:
cd packages/studio
bun run dev # Start Vite dev server
bun run build # Build for production
bun run typecheck # Type-check
Tech stack
- React 18/19, Zustand (state management)
- CodeMirror 6 (editor)
- Tailwind CSS (styling)
- Vite (bundler)
- Phosphor Icons
Documentation
Full documentation: hyperframes.heygen.com/packages/studio
Related packages
@hyperframes/core— types and parsers used by the editorhyperframes— CLI that serves the studio viahyperframes preview