#94 — Active tier simulation (complete):
- Add ActiveSim marker to all 9 test world room NPC spawns
- Fix test entities in routine.rs and path_follow.rs to include ActiveSim
so With<ActiveSim> queries match correctly in unit tests
#99 — Tier transition logic (complete):
- Implement update_tier_markers system in tier.rs
- Promotes/demotes tier markers by manhattan distance from PlayerCharacter:
≤40 tiles → ActiveSim, ≤120 → BackgroundSim, beyond → StateSaved
- Handles cross-z-level as u32::MAX (effectively unreachable)
- No-op when no PlayerCharacter entity present (headless tests safe)
- 11 new unit tests covering all distance bands and boundary cases
- TierPlugin now registers the system after movement::validate_movement
Also picks up extended test coverage added by hoshe:
- observer/tests.rs — 230 lines of perception observer tests
- sound.rs — additional sound event integration tests
All 548 tests pass.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
jpmschweitzerandClaude Sonnet 4.6
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