Immutable. This exact content is served forever at /api/v1/blob/1e6c51ff6309cd2f.
--- 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. --- # 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,drawbox=c=black@0.5: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, caption rail at `top: 1002`) 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 tied to a script phrase`. If no registry surface fits and no faithful analog exists, it's a checklist scene — don't invent fake UI for something we can't represent honestly. ### 3 · Two-layer script (spoken vs display) Write the script as **token lines** per `references/script-voice.md`: conversational register, every technical term carrying a `spoken` phonetic form from `references/lexicon.json` while `display` keeps standard spelling. Captions show `display`; the VO reads `spoken`. Any term not in the lexicon: STOP and ask the user how it's pronounced, then add it to the lexicon. Save as `script-tokens.json` in the project. ### 4 · VO — Annie (HeyGen, pinned) ```bash # spoken-layer text only; words JSON = ground-truth timestamps of the SPOKEN text # Repo-native path: the changelog-video skill runs from the hyperframes repo root, # so it uses the tracked hyperframes-media TTS helper directly (no `npx hyperframes # skills` install step). If you've copied the skill into another repo, swap in # your own path to the media-use / hyperframes-media heygen-tts.mjs. node skills/hyperframes-media/scripts/heygen-tts.mjs ./vo-spoken.txt \ -o voiceover.mp3 --words vo-words.json \ --voice 330290724a1b470fb63153f34d4c0183 # Annie — lifelike (do not substitute) ``` Requires `heygen` CLI ≥0.3.0 authenticated (`heygen auth login --oauth`). Then align spoken timestamps back to display tokens: ```bash node <SKILL_DIR>/scripts/align-captions.mjs \ --tokens script-tokens.json --words vo-words.json --out captions.json ``` `captions.json` is the caption-rail input (display spelling, spoken timing). The aligner prints `MISMATCH` warnings — resolve every one before building (usually a lexicon spelling the TTS renders as multiple words). **The audio is the clock**: all beat times come from `vo-words.json`; a VO regen re-opens every seam. ### 5 · Build Follow `references/build-spec.md` exactly: brand tokens + fonts (bundled in `<SKILL_DIR>/assets/`), the animated background encode, scene scaffold, chrome, caption rail, one rationed green moment per scene. Then the doctrine order: `ledger.json` (all ordinary seams cut-the-curve LEFT) → seam-stamp → internal beats on VO words → seam-gate verify. ### 6 · Gates (all green before presenting) 1. `bun run --cwd packages/cli hyperframes check` (or the installed `hyperframes` CLI from the repo-local `skills/hyperframes-cli/` skill) — 0 errors (contrast: dim text ≥ .66 alpha). Do NOT reach for `npx hyperframes@latest`; the tracked repo-local CLI is the source of truth for the composition contract this skill produces against. 2. `seam-gate.mjs verify` — 0 fail. 3. Restart the preview server (it caches the bundle), spot-check 3-4 beats via `__player.seek` on the raw comp page. 4. Do NOT render unless the user asks. After a requested render, verify frames from the MP4 (`ffmpeg -ss <t> … -frames:v 1`): captions present, background video not black, no tiny/frozen frames. ## Project layout ``` projects/active/weekly-changelog-<range>/ ├── index.html # single-doc master (scenes as slides, stamped seams) ├── ledger.json # vector ledger (seam-stamp input) ├── script-tokens.json # two-layer script (source of truth for VO + captions) ├── vo-spoken.txt # generated: spoken layer, one line ├── voiceover.mp3 + vo-words.json + captions.json ├── bgm.mp3 # copy from <SKILL_DIR>/assets/bgm.mp3 (the house track) unless the user supplies one └── assets/fonts/ + assets/bg-pattern-<dur>s.mp4 ``` ## Anti-patterns | Don't | Instead | | ----------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- | | Bullet-point slides for UI changes | Mock the surface acting out the change | | Fake UI for un-representable items | Honest checklist scene | | Plain "JSON"/"CLI" in the TTS text | Lexicon spoken forms; display stays standard | | Phonetic spellings in captions | Captions always render the display layer | | Guessing an unknown term's pronunciation | Ask, then grow the lexicon | | Speaking every changelog item | ≤3 per theme; the digest link carries the rest | | Green accents everywhere | One green moment per scene (#5ef17c) | | Starting from a prior video's index.html | Step 0 — copy `examples/master-skeleton.html` from this skill into `project/index.html`, always | | Hand-crafted `@font-face` / WebGL shader / custom BGM | Step 0 — copy this skill's `assets/` verbatim; the skill's assets ARE the brand | | Delivered without CloudFront invalidation | Run `aws cloudfront create-invalidation` on distribution `E2BSLVSZ7FG3U0` for the exact path after any S3 replace — CDN caches the old file otherwise |