phase 8: Ouroboros boss fight — pattern puzzle with 3 victory paths
First Archon encounter: a cyclical pattern-recognition puzzle.
Boss AI: 4-phase cycle (Coil → Spray → Lash → Digest) with
escalating difficulty (10% faster per cycle, caps at 5 cycles).
Victory paths (all based on real chemistry):
- Chemical: NaOH during Spray phase (acid-base neutralization, 3x dmg)
- Direct: any projectile during Digest vulnerability window
- Catalytic: Hg poison stacks (mercury poisons catalytic sites, reduces
regen+armor permanently)
New files: src/boss/ (types, ai, victory, arena, factory, reward),
src/data/bosses.json, src/scenes/BossArenaScene.ts, tests/boss.test.ts
Extended: ECS Boss component, CodexEntry 'boss' type, GameScene
triggers arena on Resolution phase completion.
70 new tests (455 total), all passing.
Co-authored-by: Cursor <cursoragent@cursor.com>
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