Countline 编辑叙事发布短片

Count Up Hero Number Driven Ui Story Film

A concise launch film where one result counts upward while a cursor turns a messy request into a finished product moment.

Style: Countline Editorial. Crisp editorial optimism with a high-contrast product interface and one insistent number driving the story. Follow references/style-guide.md exactly.

Use this skill when

• Launching a focused software product with one memorable outcome.
• Explaining a workflow where the result matters more than a feature list.
• Creating a concise social or product-marketing film from a structured brief.

Do not use

• Long-form product tutorials, feature tours, or onboarding videos that require sustained reading.
• Data-heavy performance reports, regulated claims, or launch films dependent on photographic footage.
• To reproduce another company's brand, logo, product UI or copyrighted characters.

Inputs

• Product name, one-sentence promise, and primary audience
• Starting problem and the measurable result the film should count toward
• Three interface actions or product moments to visualize
• Proof point, benchmark, or customer outcome that can be stated honestly
• Preferred call to action and any required launch date

If something essential is missing, ask one short question before starting. Never invent facts, numbers, quotes or customer names; mark gaps as [needs source].

Workflow

1. Read references/motion-contract.md and references/style-guide.md. Their rules are fixed for this skill.
2. Fill references/scene-map.md from the brief (4-8 scenes, 20-45 s). Never invent product numbers, names or quotes; ask for anything required that is missing.
3. Copy references/composition.html to film/composition.html. Keep the stage, the ambient layer, the progress line and the fit script.
4. Delete the example scenes you do not use, set each scene's text, data-start, data-duration and the absolute animation-delay values, and set <html data-duration> to the sum of scene durations.
5. Apply the style tokens in the :root block exactly as given in the style guide. Do not add colors or webfonts.
6. Open film/composition.html in a browser to preview; it plays in real time. Reload to replay.
7. Render: node scripts/render.mjs film/composition.html --out film.mp4 --fps 30 (install once: npm i -D playwright-core && npx playwright install chromium; FFmpeg must be on PATH).
8. Run the validator below and fix every problem it reports.
9. Extract stills around each cut (ffmpeg -ss <t> -i film.mp4 -frames:v 1 cut.png) and check that nothing is cropped, overlapping or frozen.
10. Run the validator and fix every problem it reports:

``bash node scripts/validate-video.mjs film.mp4 --min-seconds 20 --max-seconds 45 ``

What makes this excellent

• Open on the promised result as a single oversized count or count-adjacent phrase before explaining the product.
• Use the cursor to transform a raw request into a structured result across two or three interface scenes; each click must visibly change the state.
• Keep the count consistent across counter and proof scenes, with one believable unit and no unsupported precision.
• Use a white title or words scene as a breath between dense UI moments, with a black rule that carries across the cut.
• Make the proof scene visually comparative through staged checklist or interface states, and label each state so the improvement is understandable without invented measurements.
• Show the requested reduction in back-and-forth through a completed workflow, fewer clarification-loop labels, or a quote tied to the same central promise.
• End with a clean end card that repeats the fictional product name and a short action line without adding new claims.

Output contract

• film.mp4: H.264, 30 fps, 1280x720, 20-45 seconds.
• film/composition.html: the editable single-file composition that produced it (re-render any time with scripts/render.mjs).
• A hand-off note: the filled scene map, total duration, anything left as a placeholder, and the validator output.
• Render one wide MP4 locally from 6–10 HTML/CSS scenes with a total duration between 20 and 45 seconds.
• Keep all interface copy editable in the scene specification and preserve the count, unit, and proof claim consistently.
• Use deterministic local rendering with no generation models, remote fonts, or external image dependencies.

Reference demo and agent run

The preview is a reference render of the bundled composition with sample copy. In a real run the agent rewrites the scenes from the user's brief and assets, re-times the composition and renders a fresh MP4 that meets the output contract above.

Failure rules

• Never hand over a render that fails the validator.
• If the user's screenshots are low resolution, rebuild the surface in HTML instead of upscaling them.
• Music and footage must be supplied and licensed by the user; never download assets.