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B1 SEPARATION: pairwise soft-collision pass INSIDE EnemyAISystem (sole enemy-Position writer preserved; O(n^2) fine at MaxAlive<=14). Knocked/ lunging enemies keep committed motion but still push neighbours; the boss is never pushed; enemies yield a small personal radius around players (below melee range per review B1-1); displacement goes through the swept move so nothing shoves through walls. SeparationMaxSpeed = live knob. B2 POISE: the windup-cancel lived in the knockback CONTINUE branches (grunt/ charger/spitter). Threshold on the EXISTING KnockbackState.Speed channel: light melee (6) nudges without interrupting; the finisher (10.8) and cone (8) stagger as before. StaggerKnockbackSpeed = live knob (default 7). B4 BOSS LUNGE: a telegraphed gap-closer on its own cooldown when the target sits outside slam reach (repositioning - the slam stays the damage beat). BossState.PendingAttack (server-only byte) disambiguates the shared windup elapse (review-confirmed: naive reuse would SLAM on a lunge elapse); LungeState.UntilTick spans windup+travel so the existing IsLunging ghost bit replicates the tell, and the client draws a travel wedge instead of the slam ring while it is set. B5 PARTY HP SCALE: boss Health x(1 + 0.75/extra LIVING expedition player) at spawn (not RunParticipant - dead-respawned members park at base). Max is a GhostField so the bar stays truthful. B6 RUN-FAILED BANNER: silent wipes used to land players home with zero explanation. Client detects the (in-run)->Staging edge with a launch-cached Charge (NEVER Returning - a 1-tick transient that precedes the bank by a tick) and shows EXPEDITION FAILED for 6 s. B7 FIRE ANIM: the class ability finally moves the body - a stateless window from replicated AbilityCooldown.NextFireTick minus derived CooldownTicks (works for predicted local + interpolated remotes, no cached edges). 456/456 EditMode; live Play smoke: launch -> 5 kills credit the room clear through the corpse window -> boon window opens -> corpses expire clean, no exceptions. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>