# Iron Coast Command Cruiser

API 1 package, version 1.0.1. Enable it in Mods at the main menu and apply the selection. This package has no mod dependencies.

Enemy `iron_coast_boss:unit` is an airborne boss with **240** nominal health and a **84×56** logical canvas. Actual destruction awards 1,800 credits. The existing World rule halves boss health, rounded up, on Training and Rookie. SD and HD use the same logical body.

Three-way fan / open-center gate / locked single shot. Each life has three health phases (above two-thirds, at/below two-thirds, at/below one-third of its actual spawn health). Every phase change restarts a full warning. Brief 8-pixel, 8-tick anchored charge arcs and existing quiet audio precede the salvo; the warning and short burst hold position, then the boss recovers into a bounded lateral patrol. Gun positions follow the existing artwork. No homing retarget occurs after aim is locked.

Warning leads are 18 / 16 / 14 / 12 ticks for Training / Rookie / Veteran / Elite. Recovery leaves a new approach opportunity; watch the charge cue and move into the opening before the volley.

Only actual death increments `iron_coast_boss:defeated`; escape or time passing grants no objective credit. This enemy package does not decide mission completion. Its existing art, audio, generation provenance and asset recipes are retained.

## Validation and history

See the [current Iron Coast retune results and limits](../../docs/iron-coast-retune.md). Package-local acceptance reports, validation results and retained test sources describe pre-retune 1.0 behavior unless a result explicitly identifies the newer package and runner. They remain historical material, not current playthrough guarantees.