Per Rames: add the engine audio mixer (audioMixer.ts:350 -> ffmpeg -ss) to the
media-start-only readers — it's the live path that makes a lone data-playback-start
a shipped output bug (trimmed picture over untrimmed audio). 'Set one' isn't enough;
give the element-kind rule: <video>/<audio> use data-media-start, nested composition
uses data-playback-start (Studio writes it; it's the child-timeline offset). Also fix
editing-existing-videos.mdx, which offered both names as interchangeable for front
trim of a clip — the exact kind where they aren't.
Validates 16 more published prompts end-to-end (variants across every
video type, caption styles, overlays with proven alpha, code diff and
highlight, edit verbs against the real attribute map, a generated-avatar
talking-head through embedded-captions, a presented slideshow deck) and
fixes every prompt flaw the builds surfaced. Adds keyword-to-render
grids for the easing, camera, and marker vocabulary; two more worked
visual specs with renders; a measured before/after pair proving the
motion grammar (frozen frames vs all-alive, 211KB vs 2.5MB); before/
after render pairs on editing and generated-artwork pages; and proof
renders on the overview.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Adds 18 pages completing the Prompt Guide expansion (phases 2-4): six
video-type pages seeded by the verified example prompts, and twelve
feature pages giving prompting guidance for surfaces the docs implied
but never covered (transitions, caption styles, overlays, code blocks,
data/maps, VFX, rendering/output, editing existing videos, media/audio,
variables, runtimes/3D, design systems). All block/component/skill names
grounded against the catalog and skills; render pairing deferred.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ukimsanov