chore(meta): update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -11,12 +11,19 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Proximity detection and interaction verbs (#404, D-060) — compute_nearby_interactions system with Manhattan distance ranges (close ≤2, mid ≤5), context-sensitive verb computation (Talk, Observe, Examine), PersonOfInterest priority flip, NearbyInteraction in ObserverSnapshot v4
 - Content directory skeleton (#385, D-057) — district-as-atomic-pack layout with Sova Transit first district, 17 NPC stubs, 3 locations, 5 triangles, dialogue/monologue pools, factions, knowledge catalogs, enum definitions
 - Content schema definitions (#386) — 8 JSON Schema files (draft 2020-12) for district, location, npc-profile, dialogue-pool, monologue-pool, triangle, routine, fact-catalog validation
+- PROTOCOL_VERSION constant in bridge types — versioning strategy documented (subprocess IPC, serde defaults for field evolution)
+- Campaign, system, station JSON schemas for hierarchical content validation
 
 ### Fixed
 - Wire entity_id now uses StableId consistently across observer, observation, interpretation, and interaction systems (was Entity::to_bits() in some paths)
 - Restored system/station/district hierarchical fields in district metadata (incorrectly removed during canonical_id cleanup)
+- Unregistered entities in observer/interaction now log tracing::error instead of silently falling back to Entity::to_bits()
 
 ### Changed
+- Content directory restructured from flat districts/ to hierarchical campaigns/main/systems/krenn/stations/sova/districts/transit/ — path mirrors canonical IDs, glob-based discovery, multi-campaign/DLC ready
+- Content manifest (content.yaml) rewritten for glob-based district discovery
+- District identity fields (system, station, district) now derived from directory path — removed from district.yaml required fields
+- NPC canonical_id schema accepts district-scoped IDs (npc:transit.kael-davan) for cross-district uniqueness
 - ObserverSnapshot protocol bumped to v4 — adds nearby_interactions field, tick_rate replaces paused field in GameTime
 - NearbyInteractionBuffer.interactions is now private with take() accessor (no per-frame clone)
 - NearbyInteraction.distance changed from f32 to u32 (matches manhattan distance)
@@ -27,6 +34,10 @@ Format based on [Keep a Changelog](https://keepachangelog.com/).
 - Skills trimmed for CLAUDE.md deduplication — search-docs (-48%), ticket (-17%), review-pr (-35%) now reference CLAUDE.md for basics instead of repeating them
 - Review-pr reviewer profiles extracted to `references/reviewer-profiles.md` for progressive disclosure
 
+### Removed
+- Dead generate_snapshot function in bridge/mod.rs — superseded by compute_observer_snapshot
+- content/global/regions/ directory — region data absorbed into system.yaml metadata
+
 ### Added
 - Dual Lens Authoring Guide — 7-chapter reference for writing content that works for both smuggler and detective perspectives (D-027, D-028, D-032, D-034, D-035)
 - THE MIRROR pattern spec — transparency-as-contrast NPC design with Naia Tamm reference implementation and generator template