arc-interactive

Checks mechanical per-level solvability (a winning trajectory exists under the real game rules). Use when authoring or reviewing stems, after logic changes, or when debugging “impossible” puzzles. Complements discoverability review.

Judges whether an ARC game is discoverable by play (goals/rules learned in the env); co-requires fair shared observation/actions for humans and AIs. Use when reviewing stems for discovery-through-play or remediation.