Animation

Play technical diagrams as a sequence of beats, then export a looping HTML page. Open a .scene.json file to get a stage and a timeline: drag a step boundary to retime it, or click a part to quote its state into chat. Agents write the same JSON with ordinary file edits. GIF and MP4 export are not included; HTML is the shareable output. Requires BB 0.43 or later.

Overview

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Play technical diagrams as a sequence of beats, not a keyframe dope sheet.

What you get

An Animation editor for *.scene.json files: stage on top, step strip below.
Scrub the playhead, drag a step boundary to retime it, and click a part to quote it into chat.
A starter file from the thread panel, the command palette, or bb animation new.
HTML export from the editor, bb animation export, or animation_export_html.
An inline chat preview: ::scene{file="docs/flow.scene.json"}.
A Settings page that explains how to create, open, and export scenes.

How it works

An animation is plain JSON: named parts plus an ordered list of steps. Each step says what is true at that beat — the cache is waiting, this edge is flowing — and CSS interpolates between them. Agents edit the file with ordinary writes; the editor saves the same canonical form.

The format is compatible with Nimbalyst Animation documents. Existing .anim.json files, ::animation embeds, and anim-* / --anim-* tokens still work; new files use .scene.json, ::scene, and --scene-*. GIF and MP4 recording are not included; HTML export is the shareable output.

For agents

The bundled skill covers part types, states, geometry, and canonical key order. Validate with bb animation validate or animation_validate before export.

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