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Vance Ingalls
5de5df7fbb
## Summary Four small, mechanical type-safety cleanups across `engine`, `producer`, and `shader-transitions`. Zero behavior change — pure pre-cleanup so the rest of the stack ships against a tighter baseline. ## Why `Chunk 6` of `plans/hdr-followups.md`. Several non-null assertions and a duplicate interface had accumulated as rebase artifacts and leftover work-in-progress; lands first because it touches files later chunks edit and removes friction during review. ## What changed - `renderOrchestrator.ts`: replace `layers[layerIdx]!` with a `for (const [layerIdx, layer] of layers.entries())` so both index and element come from the iterator. - `engine/types.ts`: drop the duplicate `HfTransitionMeta` interface (rebase artifact); the original definition above it is the documented one. The orphaned doc comment now precedes `HfProtocol`. - `shader-transitions/hyper-shader.ts`: keep the local `HfTransitionMeta` declaration (the package ships as a standalone CDN bundle and must not depend on `@hyperframes/engine`), but add a sync comment pointing at the source of truth in `engine/src/types.ts`. - `alphaBlit.ts` + `engine/index.ts`: drop `export` from `getSrgbToHdrLut` and remove its re-export. It was only ever called by the internal `blitRgba8OverRgb48le`; the public surface was dead code. ## Test plan - [x] `bun run --filter @hyperframes/engine typecheck` - [x] `bun run --filter @hyperframes/producer typecheck` - [x] `bun run --filter @hyperframes/shader-transitions typecheck` - [x] `bun run --filter @hyperframes/engine test` — 308/308 pass (no test changes; assertions removed in code only). ## Stack Chunk 6 of `plans/hdr-followups.md`. Mechanical cleanup landed early per the suggested merge order.