scrapline-kit

The player-facing starter kit: bot API types, the local runner CLI (scrapline), the starter bot, and the fuel calibration harness. The contract it implements is docs/BOT-API.md; every number comes from docs/GAME-SPEC.md.

Commands (uv run scrapline … from the repo root):

• play bot.py starter — one match, replay to match.szr (--sandbox for the arena’s exact mode, --events for the event stream).
• calibrate bot.py — fuel per tick, sandboxed.
• verify match.szr / dump match.szr — re-simulate a replay / print it.
• doctor bot.py — plays your bot natively and in the arena sandbox on the same seeds, both seats, and compares the final state hash. A mismatch names the first divergent tick; the usual cause is a choice that depends on set/dict order or a tying sort key (BOT-API §6.1). Run it before every submit — the league plays the sandboxed game. Without a bot it only checks this machine (engine, sandbox runtime).
• engine which|build|fetch — locate, build or fetch the engine binary.