What problem does it solve? When starting work on this ZX Spectrum 48K Arkanoid clone written in Z80 assembly, it is hard to know what already works, what is deliberately out of scope, which file owns which behavior, and which sibling skill applies to a given task. This Skill acts as the index: it summarizes the current project state and routes you to the right in-depth skill instead of explaining everything itself. ## Core Features & Use Cases - Current-state summary: Documents what works (collisions, lives, level completion), what is deliberately absent (score, HUD, sound, interrupts), and which historical defects are fixed. - File map and routing table: Maps each of the 11 .asm files to its role and status, and routes tasks (editing levels, changing ball speed, touching collisions, building) to the correct sibling skill. - Governing facts and anti-assumptions: States the three architectural invariants (attribute-file playfield, global IX map pointer, busy-wait timing) and lists stale AUDIT.md claims that must not be trusted. - Use Case: You open the repo for the first time and want to add a fifth level. This Skill tells you the map format constraints and directs you to the map-data-format skill before you touch Mapas.asm. ## Quick Start Ask the assistant to orient you on this Arkanoid Z80 repository and tell you which skill applies to the change you want to make.