Initial commit: Meeting Room v0.1.0

Multi-agent discussion framework:
- Custom/AutoGen/CrewAI backends
- Multi-provider API (role→model binding)
- Tools system (files, web, commands)
- Markdown scenarios with YAML frontmatter
- Workspace init (meeting-room init)
- Session save (--save)

meeting_room/backends/crewai/run.py

@@ -0,0 +1,53 @@
+"""CrewAI backend — uses crewai for task-oriented multi-agent discussion."""
+
+
+def check_installed():
+    try:
+        import crewai  # noqa
+        return True
+    except ImportError:
+        return False
+
+
+def run(scenario_path: str, config: dict):
+    if not check_installed():
+        print("CrewAI is not installed. Run:\n  pip install meeting-room[crewai]")
+        return []
+
+    import yaml
+    from crewai import Agent, Task, Crew, Process
+    from meeting_room.scenario_loader import load_scenario
+
+    scenario = load_scenario(scenario_path)
+    roles = config["roles"]
+    participants = scenario.get("participants", list(roles.keys()))
+
+    agents = []
+    for role_id in participants:
+        role = roles[role_id]
+        agent = Agent(
+            role=role["name"],
+            goal=role["system_prompt"].split(".")[0] + ".",
+            backstory=role["system_prompt"].strip(),
+            llm=f"{role['provider']}/{role['model']}",
+            verbose=True,
+        )
+        agents.append(agent)
+
+    discuss_task = Task(
+        description=f"Discuss this problem as a group:\n\n{scenario['problem']}",
+        agent=agents[0],
+        expected_output="Final solution with arguments from each participant",
+    )
+
+    crew = Crew(
+        agents=agents,
+        tasks=[discuss_task],
+        process=Process.sequential,
+        verbose=True,
+    )
+
+    result = crew.kickoff()
+    print(f"\n{'='*60}\nCREWAI RESULT:\n{'='*60}\n")
+    print(result)
+    return str(result)