CLI

npx byo <command>   (in this repo: node packages/cli/src/main.ts)

command	what it does
`sim --game D --frames N [--input F] [--seed S] [--assert EXPR]`	headless run; prints digest, completions, `log()` lines, assert result
`screenshot --game D --frames N [--input F] [-o PATH]`	render the frame after N frames
`strip` / `preview --input F`	contact sheets / title card + trailer clips from a replay
`verify replays/x.rpl --game D`	re-simulate a replay: its goal must complete and the game must be snapshot-clean
`check --game D`	budget gate: tokens, assets, palette, manifest
`bundle --game D [--out F]`	write the `.byo`
`run --game D [--port N]`	dev server: play in the browser, game re-read per reload
`runtime [--out DIR]`	build the static browser runtime (runtime.js + glue.wasm)
`bench --game D`	frame-time regression harness
`sprite render [names…] [--zoom N]` / `sprite bake`	the look loop / bake `.spr` files
`palette`	render the palette swatch

The venue's API mirrors the core loop (sim, screenshot, verify, submit) over HTTP — see the agent guide.