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Vance IngallsandClaude Opus 4.8
418f198b33
* feat(sdk): ws-b variables/brand — object-valued font/image + B1 JSON model
B1 — setVariableValue now drives the runtime JSON model
(data-composition-variables) so preview == render. CSS custom prop is
kept as a secondary compat write for compositions that CSS-bind directly
to --{id}.
B2 — object-valued font ({name, source}) and image ({url}) variable
types added core-to-SDK. Object values write to the JSON model only;
scalars write both model + explicit CSS style patches. Explicit style-path
patches in forward/inverse ensure apply-patches.ts handles each path type
purely (model vs CSS), so inverse patches restore exact pre-call state
without ambiguity.
Changed files:
packages/core/src/core.types.ts — font/image to CompositionVariableType + interfaces
packages/core/src/lint/rules/composition.ts — accept font/image in lint message
packages/core/src/parsers/htmlParser.ts — validate font/image variable declarations
packages/core/src/parsers/htmlParser.test.ts — tests for new variable types
packages/core/src/runtime/validateVariables.ts — checkType for font/image
packages/sdk/src/types.ts — FontValue/ImageValue; widen OverrideSet + EditOp
packages/sdk/src/index.ts — re-export FontValue/ImageValue
packages/sdk/src/session.ts — widen setVariableValue signature
packages/sdk/src/engine/patches.ts — valueChange helper for object-valued patches
packages/sdk/src/engine/mutate.ts — handleSetVariableValue: B1+B2 with explicit CSS patches
packages/sdk/src/engine/apply-patches.ts — variable case: model-only (CSS via explicit patch)
packages/sdk/src/engine/mutate.test.ts — B1+B2 round-trip + inverse tests
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* feat(sdk): ws-c elastic timing + word-alignment resolver (WS-C)
C1: getElementTimings/setElementTiming typed session methods + setHold typed
wrapper. getElementTimings reads data-duration (preferred) or data-end−data-start
(fallback) — same attr-preference as handleSetTiming. setElementTiming dispatches
a sparse map as one batch → one patch event → one undo step. setHold mirrors
setVariableValue pattern.
Also fixes a pre-existing apply-patches.ts gap: the timing/duration patch case was
absent, causing undo of duration changes to silently no-op. Added the duration
branch so inverse patches restore data-duration correctly.
C2: packages/core/src/compiler/timingResolver.ts — shared pure resolveTimings()
consumed by BOTH preview (sdk session) and render (timingCompiler) paths. Word-
anchored elements get enterAt = wordTimings[k].start + offset; elastic hold =
max(0, slotEnd − (enterAt + enterDuration + exitDuration)), clamped ≥ 0; never
timescales animated content. Un-anchored elements keep authored timing (align-on-
adjust). Deterministic + pure: no Date.now, no Math.random, no DOM.
extractGsapLabels() added to gsapParserAcorn.ts to parse tl.addLabel() calls for
the getElementTimings labels field.
Tests: timingResolver.test.ts (10 pure-function tests including preview==render
parity golden test); session.timings.test.ts (15 session-layer tests covering
duration-authored, end-authored, label extraction, batching, undo, and setHold
regression).
Gates: build ✓ · bun test (sdk+core/compiler) 434/434 ✓ · oxlint 0 warnings ✓ ·
oxfmt --check ✓ · fallow --gate new-only ✓ (complexity suppressed on 2 new
inline functions, duplication warn-only pre-existing)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* feat(sdk): addElement forward op — mint hf-id, inverse = removeElement (WS-D)
Implements WS-D: the addElement EditOp and session.addElement() typed method.
- types.ts: addElement op (parent/index/html) added to EditOp union;
addElement(parent, index, html): HfId added to Composition interface
- mutate.ts: handleAddElement inserts a single-root HTML fragment at
parent+index, minting ids against the LIVE document's existing id set
(not a fresh fragment set) via collectDocumentHfIds + mintFragmentIds;
forward = patchAdd, inverse = patchRemove; MutationResult.meta.newId
carries the minted root id
- mutate.ts: validateOp case rejects missing parent, negative index,
empty html, zero-element html, and <script> in html
- session.ts: typed addElement(parent, index, html) returns minted id
via result.meta.newId
- mutate.test.ts: 16 tests covering insert position, append semantics,
id uniqueness, content-collision rehash, nested fragments, forward/
inverse symmetry, undo, add/undo/redo stability, parent:null body
insertion, serialize round-trip, and all five validateOp rejection codes
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* feat(sdk): ws-3c — addWithKeyframes + replaceWithKeyframes SDK ops (acorn writer)
Port add-with-keyframes / replace-with-keyframes from the server recast path
to the acorn/magic-string writer and expose them as typed SDK EditOps.
- gsapWriterAcorn.ts: extend buildKeyframeObjectCode and
addAnimationWithKeyframesToScript to accept `auto?: boolean` on keyframes
(emits `_auto: 1` matching the recast writer)
- types.ts: add `addWithKeyframes` and `replaceWithKeyframes` to EditOp union
- mutate.ts: add handleAddWithKeyframes, handleReplaceWithKeyframes, and
applyGsapWithKeyframesOp dispatch sub-function; validateOp cases for both
- sdkCutover.ts: add sdkAddWithKeyframesPersist + sdkReplaceWithKeyframesPersist
(shared via dispatchWithKeyframes to eliminate clone)
- useGsapAnimationOps.ts: wire addWithKeyframes + replaceWithKeyframes
callbacks with SDK-first / server fallback pattern
- gsapWriter.parity.test.ts: add parity tests for _auto endpoint round-trip and
replaceWithKeyframes (remove + addWithKeyframes) differential golden harness;
import removeAnimationFromScript from both writers
Landmine note: tween IDs are position-derived — replaceWithKeyframes removes the
old tween (renumbering survivors) then inserts the replacement at the end; the
MutationResult patch pair restores the whole GSAP script on undo, not a per-ID
inverse, so ID-held references in callers must re-parse after structural edits.
Gate: WS-3.F (retire recast / executeGsapMutation) — NOT started here.
Remaining Studio callers (gsapDragCommit, gsapRuntimeBridge, useGestureCommit,
useEnableKeyframes) remain on the server commitMutation path until WS-3.F.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>