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Miguel Ángelandukimsanov
ebbd1eb2c2
* feat(studio): timeline collision and placement model What: new pure module timelineCollision — zone-aware drop placement (clampTrackToZone, resolveZoneDropPlacement, resolveInsertRow, resolvePlacement, lane/overlap predicates) with its full test suite. Why: the no-overlap core of the NLE clip-drag engine; plain functions, no DOM, no React, no store writes. How: new files only; type-only imports from the existing playerStore. First runtime consumer arrives with the drag-engine PRs. Test plan: bunx vitest run timelineCollision.test.ts; tsc --noEmit; fallow audit clean (all exports test-consumed). * feat(studio): timeline magnetic snapping What: new pure module timelineSnapping — snap-target collection and pixel-threshold time snapping (collectTimelineSnapTargets, snapTimelineTime, snapMoveToTargets) with tests. Why: the magnet math for clip drags/trims, reviewable standalone. How: new files only; type-only playerStore imports; consumers land with the drag engine. Test plan: bunx vitest run timelineSnapping.test.ts; tsc --noEmit; fallow audit clean. * feat(studio): multi-clip drag preview math What: new pure module timelineMultiDragPreview — group-drag passenger offsets and clamped group deltas (isMultiDragActive, multiDragDeltaSeconds, multiDragPassengerOffsetPx, clampGroupMoveDelta) with tests. Why: the group-drag math, standalone and DOM-free. How: new files only; consumed later by TimelineLanes. Test plan: bunx vitest run timelineMultiDragPreview.test.ts; tsc --noEmit; fallow audit clean. * feat(studio): timeline z-stacking sync model What: new pure module timelineStackingSync — lane order ↔ z-index reconciliation (laneIsAbove, computeStackingPatches) with tests. Why: the single source of truth for how timeline lane order maps to canvas stacking; the ordering rules and tie-breaks live here. How: new files only; consumed later by timelineZones and the stacking-sync hook. Test plan: bunx vitest run timelineStackingSync.test.ts; tsc --noEmit; fallow audit clean. * feat(studio): timeline lane-zone model What: new pure module timelineZones — visual/audio track-zone classification (classifyZone) and normalizeToZones, which re-packs lanes into zone-consistent rows; tests cover the stacking/zones interaction. Why: completes the z-model started in the stacking-sync PR. How: new files; consumes isAudioTimelineElement (leaf-helpers PR) and computeStackingPatches (stacking-sync PR); type-only playerStore imports. Test plan: bunx vitest run timelineZones.test.ts; tsc --noEmit; fallow audit clean. * feat(studio): asset click policy and canvas nudge gate What: two small pure modules with tests — assetClickBehavior (click vs double-click policy for sidebar assets) and canvasNudgeGate (debounce gate for arrow-key canvas nudges). Why: policy dependencies of the upcoming asset card and nudge hook, reviewable as plain decision tables. How: new files only. Test plan: bunx vitest run on both test files; tsc --noEmit; fallow audit clean. * test(studio): characterization suites for resize commit and razor history What: two test-only suites pinning CURRENT behavior before the NLE swap: anchoredResizeReleaseShift.test.ts (manual-offset resize release commits) and useRazorSplit.history.test.tsx (razor split undo/redo history). Why: regression tripwires — the later glue-swap PRs must keep these green. How: test files only; they import existing main modules unchanged and pass against them as-is. Test plan: bunx vitest run on both suites; fallow audit clean. * feat(studio): canvas context menu and z-order actions (unwired) What: CanvasContextMenu (right-click menu for canvas selections) and canvasContextMenuZOrder (tie-aware bring-forward/send-backward z-order patch computation) with its test suite. Shipped unwired. Why: the z-order rules are the substance; mounting is one line in the later overlay swap. How: new files, compiled against current main. Nothing mounts the menu yet, so .fallowrc.jsonc gains TEMP(studio-dnd) entries (entry registration + ignoreExports) — removed by the app-shell swap PR that wires everything. Test plan: bunx vitest run canvasContextMenuZOrder.test.ts; tsc --noEmit; fallow audit clean. --------- Co-authored-by: ukimsanov <ular.kimsanov@heygen.com>
@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