2.3: Wire skills into system prompt

- router.py: build_system_prompt() gets skills_context parameter,
  injected between memory and tools sections
- agent.py: Agent gets set_skills_registry(), calls it in respond()
  to get skills prompt section
- __main__.py: Creates SkillRegistry from skills_dir, wires to agent

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

cheddahbot/__main__.py

@@ -51,6 +51,17 @@ def main():
     except Exception as e:
         log.warning("Memory system not available: %s", e)
 
+    # Skill registry (markdown skills from skills/ directory)
+    try:
+        from .skills import SkillRegistry
+
+        log.info("Initializing skill registry...")
+        skills_registry = SkillRegistry(config.skills_dir)
+        agent.set_skills_registry(skills_registry)
+        log.info("Loaded %d skills", len(skills_registry.list_skills()))
+    except Exception as e:
+        log.warning("Skill registry not available: %s", e)
+
     # Phase 3+: Tool system
     try:
         from .tools import ToolRegistry

cheddahbot/agent.py

@@ -70,6 +70,7 @@ class Agent:
         self.conv_id: str | None = None
         self._memory = None  # set by app after memory system init
         self._tools = None  # set by app after tool system init
+        self._skills_registry = None  # set by app after skills init
 
     def set_memory(self, memory):
         self._memory = memory
@@ -77,6 +78,9 @@ class Agent:
     def set_tools(self, tools):
         self._tools = tools
 
+    def set_skills_registry(self, registry):
+        self._skills_registry = registry
+
     def ensure_conversation(self) -> str:
         if not self.conv_id:
             self.conv_id = uuid.uuid4().hex[:12]
@@ -106,10 +110,15 @@ class Agent:
             tools_schema = self._tools.get_tools_schema()
             tools_description = self._tools.get_tools_description()
 
+        skills_context = ""
+        if self._skills_registry:
+            skills_context = self._skills_registry.get_prompt_section()
+
         system_prompt = build_system_prompt(
             identity_dir=self.config.identity_dir,
             memory_context=memory_context,
             tools_description=tools_description,
+            skills_context=skills_context,
         )
 
         # Load conversation history

cheddahbot/router.py

@@ -9,8 +9,9 @@ def build_system_prompt(
     identity_dir: Path,
     memory_context: str = "",
     tools_description: str = "",
+    skills_context: str = "",
 ) -> str:
-    """Build the system prompt from identity files + memory + tools."""
+    """Build the system prompt from identity files + memory + skills + tools."""
     parts = []
 
     # 1. Identity: SOUL.md
@@ -27,7 +28,11 @@ def build_system_prompt(
     if memory_context:
         parts.append(f"# Relevant Memory\n{memory_context}")
 
-    # 4. Available tools
+    # 4. Skills context (injected by skill registry)
+    if skills_context:
+        parts.append(skills_context)
+
+    # 5. Available tools
     if tools_description:
         parts.append(f"# Available Tools\n{tools_description}")