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Vance Ingalls 9f73d15807 feat(engine): add HDR two-pass compositing with DOM alpha overlay
Per-frame in-memory alpha compositing: Chrome screenshots DOM with
transparent background (PNG alpha), FFmpeg extracts native HLG/PQ
frames as 16-bit PNG. DOM pixels (sRGB RGBA8) composited over HDR
(rgb48le) via 256-entry sRGB-to-HLG/PQ LUT. Pure Node.js PNG decoder,
single-pass FFmpeg extraction, native HDR detection before SDR
conversion.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-04-19 15:49:10 -07:00

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# Dependencies
node_modules/
# Build output
dist/
*.tsbuildinfo
# Environment
.env
.env.local
.env.*.local
# OS
.DS_Store
Thumbs.db
# Docs media — served from CDN, not committed.
# Regenerate with scripts/generate-{catalog,template}-previews.ts then upload
# with `bun run upload:docs-images`. Add explicit negations below for any
# non-generated assets (logos, svgs) that should stay in the repo.
docs/images/
# IDE
.vscode/
.idea/
*.swp
*.swo
# Test
coverage/
.debug/
# Producer regression test failures (generated debugging artifacts)
packages/producer/tests/*/failures/
# Rendered output (not test fixtures — those use git LFS)
output/
renders/
!packages/producer/tests/*/output/
# Composition source media (large binaries)
compositions/**/*.mp4
compositions/**/*.mov
compositions/**/*.MOV
# npm pack artifacts
*.tgz
# Logs
*.log
npm-debug.log*
# Temporary
tmp/
.tmp/
# Generated files
packages/producer/src/services/fontData.generated.ts
# Test artifacts
my-video/
examples/
packages/studio/data/
.desloppify/
.worktrees/
# Playwright MCP browser cache
.playwright-mcp/
# Installed skills (user-specific)
.agents/
.claude/skills/
skills-lock.json
# Skills from other PRs (not managed here)
skills/hyperframes-animation-map/
skills/hyperframes-contrast/
# Capture outputs
captures/
# Legacy test captures at repo root (use captures/ instead)
*-capture/
*-demo/
*-ad/
*-tour/
*-brand/
# Local regression-test and video project scratch directories.
# These hold per-site captures, compositions, narration audio, rendered MP4s.
cursor-tests/
basecamp-video/
launch-video*/