Storyboard format — STORYBOARD.md + parsed manifest

Defines the storyboard's base data format only: the STORYBOARD.md file shape and the StoryboardManifest it parses into. Planning the film itself is in story.md; the optional narration/TTS file (SCRIPT.md) is a separate concern, not here.

A storyboard is the plan layer for a video — an ordered set of frames (key moments) in one markdown file. Parser: @hyperframes/core/storyboard → StoryboardManifest.

Frontmatter (global direction)

YAML block at the top. Unknown keys are kept under globals.extra.

Set duration when the storyboard is first written. It is an expectation, not a gate: compare where the cut actually lands against it — judge whether the drift serves the piece, and update the value when the intended length genuinely changes.

Per-frame sections

One ## Frame N — Title heading per frame (Frame / Beat / Scene accepted at H2/H3). Metadata as - key: value bullets; everything below them until the next heading is the free-form narrative.

Two extra keys every film plan carries, so the build and the review check the same thing:

Parsed manifest

The parser is lenient: it never throws and records anything surprising as a warning.

StoryboardManifest {
  globals: { format?, message?, arc?, audience?, extra: {…} }
  frames: Array<{
    index, number?, title?,
    status,                       // "outline" | "built" | "animated"
    src?, duration? / durationSeconds?, transitionIn?,
    scene?, voiceover?, poster?,
    narrative,                    // markdown below the metadata
    extra: {…}                    // unknown keys, preserved
  }>
  warnings: Array<{ message, line?, frameIndex? }>
}

SCRIPT.md (out of scope here)

Optional, free-form, not parsed into the manifest — the locked-narration file that drives TTS, absent for videos with no narration/TTS. The per-frame voiceover above is the storyboard's own narration guide.

Example

---
format: 1920x1080
message: "Ship a launch video in an afternoon"
arc: Hook → Problem → Solution → Proof → CTA
audience: indie devs on X
---

## Frame 1 — Hook

- scene: Big type punches in on the beat
- duration: 3s
- poster: 2s
- transition_in: cut
- status: animated
- voiceover: "Ship a launch video in an afternoon."
- reads: "Ship a launch video" lands (0.3-1.6s); "in an afternoon" (1.6-3.0s)
- sound: bed enters on its strongest bar; impact on "afternoon"
- src: compositions/frames/01-hook.html

Open cold on the promise. This is the thesis — everything after pays it off.

## Frame 2 — The problem

- scene: A 20-minute timer spins on a stack of rejected takes
- duration: 4s
- transition_in: crossfade
- status: built
- voiceover: "The old way? Prompt, wait twenty minutes, get something that misses."
- src: compositions/frames/02-problem.html

The old way: prompt, wait, get something that misses. Establish the pain we remove.

Notes

• A frame with status: outline and no built src renders as an outline placeholder.
• built is the middle rung: the frame's HTML exists and its layout is confirmed (a wireframe sketch or better) — motion not yet added. Nothing is drawn yet beyond the approved layout.
• Multi-line voiceover values collapse to one line on save.