feat(engine): 实现阵营博弈机制

- FactionData 新增 threshold 和 skill 字段
- 修改能量累积逻辑：power 跨 tick 累积
- 阈值改为 10，达到后触发阵营技能
- festival 提升情绪，panic 降低情绪

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

engine-python/app/factions.py

@@ -10,7 +10,7 @@ OPTIMIST_THRESHOLD = 0.6
 FEARFUL_THRESHOLD = 0.6
 
 # 阵营技能触发阈值
-FACTION_POWER_THRESHOLD = 5
+FACTION_POWER_THRESHOLD = 10
 
 # 阵营事件对情绪的影响
 FACTION_EVENT_EFFECTS = {
@@ -39,17 +39,18 @@ def update_factions(state: WorldState) -> None:
     """统计各派系并更新 world_state
 
     流程：
-    1. 清空 factions.members
+    1. 清空 factions.members（但保留 power）
     2. 遍历所有 agents，根据 emotion 分类
     3. 更新 agent.faction 字段
     4. 将 agent 加入对应 faction.members
-    5. 每个 agent 为 faction 增加 power += 1
+    5. 每个 agent 为 faction 增加 power += 1（累积）
     """
-    # 重置 factions
-    state.factions = Factions(
-        optimists=FactionData(power=0, members=[]),
-        fearful=FactionData(power=0, members=[])
-    )
+    # 保留现有 power，只清空 members
+    current_optimist_power = state.factions.optimists.power
+    current_fearful_power = state.factions.fearful.power
+
+    state.factions.optimists.members = []
+    state.factions.fearful.members = []
 
     for agent_id, agent in state.agents.items():
         faction = classify_faction(agent)
@@ -57,11 +58,12 @@ def update_factions(state: WorldState) -> None:
 
         if faction == "optimists":
             state.factions.optimists.members.append(agent_id)
-            state.factions.optimists.power += 1
+            state.factions.optimists.power = current_optimist_power + 1
+            current_optimist_power = state.factions.optimists.power
         elif faction == "fearful":
             state.factions.fearful.members.append(agent_id)
-            state.factions.fearful.power += 1
-        # neutral 不加入任何派系
+            state.factions.fearful.power = current_fearful_power + 1
+            current_fearful_power = state.factions.fearful.power
 
 
 def apply_faction_influence(state: WorldState) -> None:
@@ -79,7 +81,7 @@ def check_and_trigger_faction_event(state: WorldState) -> FactionEventResult:
     """检查并触发阵营事件
 
     规则：
-    - 当 faction.power >= 5 时，触发对应世界事件
+    - 当 faction.power >= faction.threshold 时，触发对应技能
     - optimists → festival（提升情绪）
     - fearful → panic（降低情绪）
     - 触发后该 faction.power 归零
@@ -87,13 +89,13 @@ def check_and_trigger_faction_event(state: WorldState) -> FactionEventResult:
     result = FactionEventResult(type=None, source_faction=None)
 
     # 检查乐观派
-    if state.factions.optimists.power >= FACTION_POWER_THRESHOLD:
+    if state.factions.optimists.power >= state.factions.optimists.threshold:
         result = FactionEventResult(type="festival", source_faction="optimists")
         _apply_faction_event(state, "festival")
         state.factions.optimists.power = 0
 
     # 检查恐惧派
-    elif state.factions.fearful.power >= FACTION_POWER_THRESHOLD:
+    elif state.factions.fearful.power >= state.factions.fearful.threshold:
         result = FactionEventResult(type="panic", source_faction="fearful")
         _apply_faction_event(state, "panic")
         state.factions.fearful.power = 0

engine-python/app/models.py

@@ -47,6 +47,8 @@ class Stance(BaseModel):
 class FactionData(BaseModel):
     """单个派系的数据"""
     power: int = 0
+    threshold: int = 10
+    skill: str = ""
     members: List[str] = Field(default_factory=list)
 
 

engine-python/app/state.py

@@ -31,8 +31,8 @@ def get_default_state() -> WorldState:
         events=[],
         global_meter=GlobalMeter(value=0, threshold=100, cooldown=0),
         factions=Factions(
-            optimists=FactionData(power=0, members=[]),
-            fearful=FactionData(power=0, members=[])
+            optimists=FactionData(power=0, threshold=10, skill="festival", members=[]),
+            fearful=FactionData(power=0, threshold=10, skill="panic", members=[])
         ),
         story_arcs=get_default_story_arcs(),
     )