changelog-video

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---
name: changelog-video
description: Turn a weekly changelog .md into a finished branded changelog video (square 1080, ~45-60s, Annie VO, animated brand background, mock-UI visualizations, lowkey captions). Use when the user provides a changelog/digest markdown and wants the weekly video, or says "changelog video". Self-contained — fonts, background, lexicon, and scripts ship in this skill.
metadata:
  internal: true
---

# Changelog → Branded Video

Input: a changelog .md (themes + items, like the weekly HyperFrames digest).
Output: a lint-clean, seam-gate-green HyperFrames project in
`projects/active/weekly-changelog-<range>/`. Render only when asked.

**Load first, non-negotiable:** `motion-doctrine` (+ `cut-the-curve`,
`oversized-cursor` if a cursor appears, `seam-craft`) and `captions-overlay`.
This skill supplies the changelog-specific pipeline; the doctrine supplies the
motion law.

## The prime directive: visualize, don't list

Every theme is illustrated by an **animated mock of the actual UI or a
faithful analog** acting out the change in experience — never text bullets.
Route every theme/item through `references/visualization-registry.md` BEFORE
writing the script; the registry decides ui-recreate / ui-analog / terminal /
checklist. Text checklist is the LAST resort, reserved for genuinely
non-visual items (reliability fix lists).

## Pipeline

### 0 · Bootstrap the project from THIS skill's assets — non-negotiable

**Do this before writing any composition HTML. Skipping it always produces a video that looks like a similar project you built before, NOT this skill's brand — that's the single most common way this skill goes off-brand.** The skill's assets, fonts, and scaffold are the skill; the SKILL.md prompt is a router.

```bash
mkdir -p project/assets/fonts
cp <SKILL_DIR>/assets/fonts/*.woff2 project/assets/fonts/
cp <SKILL_DIR>/assets/bgm.mp3 project/bgm.mp3
ffmpeg -y -stream_loop 15 -i <SKILL_DIR>/assets/bg-pattern.mp4 -t <TOTAL> \
  -vf "scale=1080:1080,fps=30,eq=saturation=0.72,[email protected]:t=fill" \
  -an -c:v libx264 -crf 20 -pix_fmt yuv420p project/assets/bg-pattern-<TOTAL>s.mp4
cp <SKILL_DIR>/examples/master-skeleton.html project/index.html
```

Then **read `references/build-spec.md` end-to-end** (not skimmed) — it defines the brand tokens (TT Norms Pro + ABC Solar Display + TT Norms Mono, cream `#f5f6f4`, rationed green `#5ef17c`, glass cards with green-tinted borders, kicker/sec-chip pill shape, 32px caption rail at `top: 990`) that every scene inherits from the scaffold.

Only THEN begin steps 1-6 below. Steps 1-4 (parse, route, script, VO) plan what goes into the scaffold; step 5 fills placeholders (`<RANGE>`, `<TOTAL>`, `<CUT_N>`, `<DUR_N>`, scene bodies) inside the already-copied `project/index.html` — you do NOT rewrite the scaffold's chrome, fonts, palette, or layout shell.

If you catch yourself reaching for `cp` on a prior video's `index.html`, or writing your own `@font-face` declarations, or designing a WebGL shader background instead of using the encoded bg-pattern MP4 above: STOP. Delete the current `index.html` and restart at the `cp` of the master-skeleton scaffold. Rebuilding scene content on the right scaffold is cheaper than retrofitting brand into the wrong scaffold.

### 1 · Parse + editorial cut

- Extract: week range, headline stats (releases, commits), themes, items.
- **Budget: 45-60s total.** Title ≤2s, outro ≤3.5s, 4 themes ≈ 9-12s each.
- Per theme keep ONE hero visualization + at most 3 spoken items. Everything
  else exists only as the outro's "full digest" pointer. Cutting is the job:
  a changelog with 30 items still yields ≤14 spoken beats.
- Order themes by story: marquee feature → product surface → performance →
  reliability (the digest usually already reads this way).

### 2 · Visualization routing

For each theme, pick the surface from `references/visualization-registry.md`
and write one line: `theme → surface → the 2-4 sequenced actions the mock
performs, each