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hyperframes/packages/studio
Vance Ingalls 2071c85c9a feat(studio,core): populate hfId in DomEditSelection + widen MutationTarget (R7, T5a) (#1296)
## Summary

- Adds `hfId` field to `resolveDomEditSelection` — reads `data-hf-id` off the live element and stores it in `DomEditSelection.hfId`
- `DomEditSelection extends PatchTarget` which already declares `hfId?: string`, so this is a single new line at the return site
- Widens `MutationTarget` in `files.ts` to include `hfId?: string` (type hygiene — the value already survives through `parseMutationBody`'s by-reference pass, so this is documentation not a behaviour change)

## Why

R7 / Task 5a. The full hf-id write-back and patch-engine infrastructure (R1 + R7 Tasks 0–4, PRs #1269–#1292) is server-complete. The only missing piece was: the Studio client never read `data-hf-id` off a hit-tested element, so `target.hfId` was always `undefined` and the `hfId`-first lookup branches in both patch engines were unreachable in production. This PR fixes the selection side — the commit wire (#1297) completes the path.

## Test plan

- [ ] `packages/studio/src/components/editor/domEditingLayers.test.ts` — two new tests with jsdom environment:
  - `resolveDomEditSelection` on an element with `data-hf-id` → `selection.hfId` is populated
  - element without `data-hf-id` → `selection.hfId` is `undefined`
- [ ] All 65 studio test files pass, all 72 core test files pass

🤖 Generated with [Claude Code](https://claude.com/claude-code)
2026-06-09 14:18:14 -07:00
..
2026-06-09 19:50:45 +00:00
2026-03-21 22:43:56 -07:00

@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