- PNG decoder with self-contained Deflate decompressor (RGB/RGBA) - ECS query3 and query4 for multi-component queries - Capsule collider + GJK/EPA narrow phase for convex shapes - Coulomb friction in physics solver - Lua engine API bindings (spawn, position, entity_count) Tests: 255 → 286 (+31) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>