rezem

Pure abstract frame-processing library.

Tooling: use Bun for installs, examples, and tests. TypeScript builds with tsc. Do not use tsx; run .ts files with bun path/to/file.ts or bun run example:….

What this gives you

• frame(input, worker) to build frame sections from any input source
• compose(sections, reduce, initial) to reduce sections into any output
• No built-in media coupling (no MP4/GIF logic in the library core)

Usage

import { compose, frame } from "rezem";

const sections = frame(["a", "bb", "ccc"], (input, index) => ({
  output: { input, len: input.length },
  meta: { index },
}));

const result = await compose(
  sections,
  (acc, section) => {
    acc.total += section.output.len;
    acc.items.push(section.output.input);
    return acc;
  },
  { total: 0, items: [] as string[] },
);

Examples

• examples/satori-video/: Satori PNG frames → ffmpeg MP4 (image timeline)
• examples/terminal-ascii/: terminal animation (ANSI)
• examples/git-replay/: commit timeline → markdown narrative (no media)
• examples/simulation-loop/: Conway-style ticks → markdown + JSON snapshots
• web/: Next.js demos — git / simulation / ASCII (bun run web)

API Contract

See API.md for the abstract contract.