combat-mechanics

Damage uses Fractional Armor Mitigation: Damage = Atk * (Atk / (Atk + Def * 2.0 + 1.0)), cast to int after calculation. Every successful hit deals a minimum of 1 damage regardless of Defense, and tactical modifiers are applied to base Atk/Def before the calculation.

CombatEngagementDecisionService only decides whether and how an actor wants to engage, returning a CombatEngagementDecisionResult without mutating state. Actual damage and outcomes are resolved later by the authoritative pipeline, so the assessment layer never applies effects directly.

This is the Sliding State rule on the action_routing phase: if another actor killed the target earlier in the same tick's queue, later actors see it as already dead and cannot receive kill credit. This order-dependent behavior is intentional, not a bug.

Modifiers include High Ground (+0.20 Atk), Flanking (+0.15 Atk), Surrounded (+0.25 Atk), Cover (+0.30 Def), Shatter (x1.50 Atk vs Frozen targets), Exhaustion (x0.80 Atk when Sleep Debt > 80), and Bond Synergy (+0.10 Atk with adjacent familiar allies).

Heroes of Generation 1-3 are reborn on defeat with their Generation incremented. Generation 4 heroes suffer permadeath and are permanently removed. Kill rewards differ by target type: monsters give LVL*10 XP and LVL*5 gold, heroes give LVL*20 XP and LVL*50 gold.

The combat_engagement domain must not import from other domain packages and must not call the Kernel or other pipeline phases directly. All sub-services are stateless and deterministic, and learning outputs are passed to the pipeline for application rather than applied directly.