docs: record combat, wolves, factions, and tribe war systems

docs/PROJECT_CONTEXT.md

@@ -242,6 +242,14 @@ plugin content, not game architecture.
 - The world runs a deterministic four-day seasonal cycle: the cold day halves
   gather yields and pauses berry regrowth, surfacing a recurring shortage the
   player and villagers can address.
+- Combat is playable: the player swings an equipped sword (left click) and
+  dashes (Shift) with cooldowns; hits land against hostile raiders and wolves
+  through a deterministic simulation `ConflictSystem`. Wolves hunt hungry
+  nearby villagers, and the hill tribe raids the village when it is short of
+  food while the village holds plenty — unless the tribe reads the village's
+  strength (strong NPCs who can swap to defence) and judges victory unlikely,
+  in which case it plans or aborts. Strong villagers automatically defend
+  during a raid.
 - `Escape` releases captured mouse input.
 
 ### Village simulation
@@ -640,9 +648,16 @@ These are expected prototype constraints, not necessarily isolated bugs:
   gathering use `ResourceNode` instances with no fallback, food transfer uses
   the typed pantry `StorageNode`, and patrol/study/rest use `ActivitySite`.
 - Current NPC, village, resource, storage, animal, event, knowledge,
-  relationship, opportunity, clock, RNG, and player-citizen state serialize
-  through world schema v13. F5/F9 provide one validated local quicksave; a save
-  menu, metadata, and player-transform persistence remain deferred.
+  relationship, opportunity, clock, RNG, player-citizen, combatant, and
+  faction state serialize through world schema v14. F5/F9 provide one validated
+  local quicksave; a save menu, metadata, and player-transform persistence
+  remain deferred.
+- Combatants and factions are deterministic simulation records. NPC defenders,
+  tribe raiders, and wolves carry health and equipped weapons; the village and
+  hill-tribe factions drive an emergent war cycle gated by tribe hunger, village
+  food surplus, and a victory-confidence check against the NPC-derived village
+  defence. Combatant positions and faction food are quantized to binary-exact
+  steps so JSON round-trips preserve continuation checksums.
 - The player is a first-class citizen with persisted hunger, energy, and
   carried inventory. Gathering moves yield into carried inventory, depositing
   restocks the typed pantry or woodpile, and eating eases hunger from carried