3.5: Wire multi-agent startup in __main__.py

Loop over config.agents to create per-agent LLM (when model override set),
Agent, MemorySystem (with scope), and register in AgentRegistry. Shared
ToolRegistry and SkillRegistry are wired to all agents. Scheduler and UI
use the default agent.

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

cheddahbot/__main__.py

@@ -3,6 +3,7 @@
 import logging
 
 from .agent import Agent
+from .agent_registry import AgentRegistry
 from .config import load_config
 from .db import Database
 from .llm import LLMAdapter
@@ -25,53 +26,89 @@ def main():
 
     log.info("Chat brain model: %s", config.chat_model)
     log.info("Execution brain model: %s (Claude Code CLI)", config.default_model)
-    llm = LLMAdapter(
+    default_llm = LLMAdapter(
         default_model=config.chat_model,
         openrouter_key=config.openrouter_api_key,
         ollama_url=config.ollama_url,
         lmstudio_url=config.lmstudio_url,
     )
-    if llm.is_execution_brain_available():
+    if default_llm.is_execution_brain_available():
         log.info("Execution brain: Claude Code CLI found in PATH")
     else:
         log.warning(
             "Execution brain: Claude Code CLI NOT found — heartbeat/scheduler tasks will fail"
         )
 
-    log.info("Creating agent...")
-    agent = Agent(config, db, llm)
-
-    # Phase 2+: Memory system
-    try:
-        from .memory import MemorySystem
-
-        log.info("Initializing memory system...")
-        memory = MemorySystem(config, db)
-        agent.set_memory(memory)
-    except Exception as e:
-        log.warning("Memory system not available: %s", e)
-
     # Skill registry (markdown skills from skills/ directory)
+    skills_registry = None
     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
+    # Tool system (shared across all agents — tools are singletons)
+    tools = None
     try:
         from .tools import ToolRegistry
 
+        # Create a temporary default agent for tool discovery; will be replaced below
+        _bootstrap_agent = Agent(config, db, default_llm)
         log.info("Initializing tool system...")
-        tools = ToolRegistry(config, db, agent)
+        tools = ToolRegistry(config, db, _bootstrap_agent)
-        agent.set_tools(tools)
     except Exception as e:
         log.warning("Tool system not available: %s", e)
 
+    # Multi-agent setup
+    registry = AgentRegistry()
+    log.info("Configuring %d agent(s)...", len(config.agents))
+
+    for i, agent_cfg in enumerate(config.agents):
+        # Per-agent LLM (if model override set)
+        if agent_cfg.model:
+            agent_llm = LLMAdapter(
+                default_model=agent_cfg.model,
+                openrouter_key=config.openrouter_api_key,
+                ollama_url=config.ollama_url,
+                lmstudio_url=config.lmstudio_url,
+            )
+        else:
+            agent_llm = default_llm
+
+        agent = Agent(config, db, agent_llm, agent_config=agent_cfg)
+
+        # Memory system (with optional scoping)
+        try:
+            from .memory import MemorySystem
+
+            memory = MemorySystem(config, db, scope=agent_cfg.memory_scope)
+            agent.set_memory(memory)
+        except Exception as e:
+            log.warning("Memory system not available for agent '%s': %s", agent_cfg.name, e)
+
+        # Wire shared tool registry and skills
+        if tools:
+            agent.set_tools(tools)
+        if skills_registry:
+            agent.set_skills_registry(skills_registry)
+
+        registry.register(agent_cfg.name, agent, is_default=(i == 0))
+        log.info(
+            "  Agent '%s' (%s) — tools: %s, scope: %s",
+            agent_cfg.name,
+            agent_cfg.display_name,
+            "all" if agent_cfg.tools is None else str(len(agent_cfg.tools)),
+            agent_cfg.memory_scope or "shared",
+        )
+
+    # Update tool registry to reference the default agent (for ctx injection)
+    default_agent = registry.default
+    if tools and default_agent:
+        tools.agent = default_agent
+
     # Notification bus (UI-agnostic)
     notification_bus = None
     try:
@@ -82,18 +119,18 @@ def main():
     except Exception as e:
         log.warning("Notification bus not available: %s", e)
 
-    # Phase 3+: Scheduler
+    # Scheduler (uses default agent)
     try:
         from .scheduler import Scheduler
 
         log.info("Starting scheduler...")
-        scheduler = Scheduler(config, db, agent, notification_bus=notification_bus)
+        scheduler = Scheduler(config, db, default_agent, notification_bus=notification_bus)
         scheduler.start()
     except Exception as e:
         log.warning("Scheduler not available: %s", e)
 
     log.info("Launching Gradio UI on %s:%s...", config.host, config.port)
-    app = create_ui(agent, config, llm, notification_bus=notification_bus)
+    app = create_ui(default_agent, config, default_llm, notification_bus=notification_bus)
     app.launch(
         server_name=config.host,
         server_port=config.port,