Your agent can now direct, score, and edit its own launch film

What it does

Tell Claude Code or Codex “make a 30-second launch film for my product” and huashu-motion takes over: it reads your product, pitches three creative directions, writes the whole film, composes a score, and opens a browser-based editor. Unhappy with a frame? Click it, type what’s wrong, and the agent fixes only that spot — the comment carries the timestamp, scene, and the element’s location in the source. Every film is just an index.html built with GSAP, Canvas, Three.js, or SVG. No video-generation models involved; every frame is code and time.

The interesting bit

The “director rules” aren’t vibes — the author measured 21 real launch films (Apple, Nothing, Linear, Vercel…) with FFmpeg for cut points, beats, loudness, and energy curves, and catalogued 20 motion languages from 142 high-engagement films. The agent also composes in ABC notation (plain-text sheet music) before animating, so scene cuts land on beats, played back through real instrument samples — all generated locally, no paid APIs.

Key highlights

• Point-to-edit: click a frame, leave a note; the agent zooms into that exact frame and patch, changes only that, and refreshes the preview in place. Full undo history.
• Renders by driving your existing Chrome in parallel across CPU cores — a 30-second film in roughly 12–15 seconds on a 14-core Mac.
• Ships with 20 motion languages, 10 templates, 23 sound effects, 27 fonts, and fallback music directions for 12 product categories.
• om check and om qa catch cropped text, dead frames, and hard cuts before delivery; the skill insists the agent actually watches the film at normal speed.
• Works with cheaper models too — a demo film was made with DeepSeek V4.1 Flash for about ¥1.95.

Caveats

• Only tested on macOS; Codex’s sandbox blocks local preview and browser access, needing manual approval.
• Requires Node 22+, Chrome, and FFmpeg; real instrument samples (~55MB) and Chinese voice-over support are optional extras.

Verdict

If you’d rather ship a launch video than fight a timeline editor, this is a genuinely clever use of agent skills. If you need photoreal footage or licensed music beds, it’s not that — it’s motion graphics, done in code, done well.