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c6a27ef1d7
- 11 sessions from basic agent loop to autonomous teams - Python MVP implementations for each session - Mental-model-first docs in en/zh/ja - Interactive web platform with step-through visualizations - Incremental architecture: each session adds one mechanism
401 lines
16 KiB
Python
401 lines
16 KiB
Python
#!/usr/bin/env python3
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"""
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s09_agent_teams.py - Agent Teams
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Persistent named agents with file-based JSONL inboxes. Each teammate runs
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its own agent loop in a separate thread. Communication via append-only inboxes.
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Subagent (s04): spawn -> execute -> return summary -> destroyed
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Teammate (s09): spawn -> work -> idle -> work -> ... -> shutdown
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.team/config.json .team/inbox/
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+----------------------------+ +------------------+
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| {"team_name": "default", | | alice.jsonl |
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| "members": [ | | bob.jsonl |
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| {"name":"alice", | | lead.jsonl |
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| "role":"coder", | +------------------+
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| "status":"idle"} |
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| ]} | send_message("alice", "fix bug"):
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+----------------------------+ open("alice.jsonl", "a").write(msg)
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read_inbox("alice"):
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spawn_teammate("alice","coder",...) msgs = [json.loads(l) for l in ...]
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| open("alice.jsonl", "w").close()
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v return msgs # drain
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Thread: alice Thread: bob
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+------------------+ +------------------+
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| agent_loop | | agent_loop |
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| status: working | | status: idle |
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| ... runs tools | | ... waits ... |
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| status -> idle | | |
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+------------------+ +------------------+
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5 message types (all declared, not all handled here):
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+-------------------------+-----------------------------------+
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| message | Normal text message |
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| broadcast | Sent to all teammates |
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| shutdown_request | Request graceful shutdown (s10) |
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| shutdown_response | Approve/reject shutdown (s10) |
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| plan_approval_response | Approve/reject plan (s10) |
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+-------------------------+-----------------------------------+
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Key insight: "Teammates that can talk to each other."
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"""
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import json
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import os
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import subprocess
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import threading
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import time
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from pathlib import Path
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from anthropic import Anthropic
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from dotenv import load_dotenv
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load_dotenv(override=True)
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if os.getenv("ANTHROPIC_BASE_URL"):
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os.environ.pop("ANTHROPIC_AUTH_TOKEN", None)
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WORKDIR = Path.cwd()
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client = Anthropic(base_url=os.getenv("ANTHROPIC_BASE_URL"))
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MODEL = os.environ["MODEL_ID"]
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TEAM_DIR = WORKDIR / ".team"
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INBOX_DIR = TEAM_DIR / "inbox"
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SYSTEM = f"You are a team lead at {WORKDIR}. Spawn teammates and communicate via inboxes."
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VALID_MSG_TYPES = {
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"message",
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"broadcast",
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"shutdown_request",
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"shutdown_response",
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"plan_approval_response",
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}
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# -- MessageBus: JSONL inbox per teammate --
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class MessageBus:
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def __init__(self, inbox_dir: Path):
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self.dir = inbox_dir
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self.dir.mkdir(parents=True, exist_ok=True)
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def send(self, sender: str, to: str, content: str,
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msg_type: str = "message", extra: dict = None) -> str:
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if msg_type not in VALID_MSG_TYPES:
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return f"Error: Invalid type '{msg_type}'. Valid: {VALID_MSG_TYPES}"
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msg = {
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"type": msg_type,
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"from": sender,
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"content": content,
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"timestamp": time.time(),
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}
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if extra:
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msg.update(extra)
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inbox_path = self.dir / f"{to}.jsonl"
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with open(inbox_path, "a") as f:
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f.write(json.dumps(msg) + "\n")
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return f"Sent {msg_type} to {to}"
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def read_inbox(self, name: str) -> list:
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inbox_path = self.dir / f"{name}.jsonl"
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if not inbox_path.exists():
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return []
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messages = []
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for line in inbox_path.read_text().strip().splitlines():
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if line:
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messages.append(json.loads(line))
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inbox_path.write_text("")
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return messages
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def broadcast(self, sender: str, content: str, teammates: list) -> str:
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count = 0
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for name in teammates:
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if name != sender:
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self.send(sender, name, content, "broadcast")
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count += 1
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return f"Broadcast to {count} teammates"
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BUS = MessageBus(INBOX_DIR)
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# -- TeammateManager: persistent named agents with config.json --
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class TeammateManager:
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def __init__(self, team_dir: Path):
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self.dir = team_dir
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self.dir.mkdir(exist_ok=True)
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self.config_path = self.dir / "config.json"
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self.config = self._load_config()
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self.threads = {}
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def _load_config(self) -> dict:
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if self.config_path.exists():
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return json.loads(self.config_path.read_text())
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return {"team_name": "default", "members": []}
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def _save_config(self):
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self.config_path.write_text(json.dumps(self.config, indent=2))
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def _find_member(self, name: str) -> dict:
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for m in self.config["members"]:
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if m["name"] == name:
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return m
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return None
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def spawn(self, name: str, role: str, prompt: str) -> str:
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member = self._find_member(name)
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if member:
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if member["status"] not in ("idle", "shutdown"):
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return f"Error: '{name}' is currently {member['status']}"
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member["status"] = "working"
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member["role"] = role
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else:
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member = {"name": name, "role": role, "status": "working"}
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self.config["members"].append(member)
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self._save_config()
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thread = threading.Thread(
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target=self._teammate_loop,
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args=(name, role, prompt),
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daemon=True,
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)
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self.threads[name] = thread
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thread.start()
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return f"Spawned '{name}' (role: {role})"
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def _teammate_loop(self, name: str, role: str, prompt: str):
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sys_prompt = (
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f"You are '{name}', role: {role}, at {WORKDIR}. "
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f"Use send_message to communicate. Complete your task."
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)
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messages = [{"role": "user", "content": prompt}]
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tools = self._teammate_tools()
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for _ in range(50):
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inbox = BUS.read_inbox(name)
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for msg in inbox:
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messages.append({"role": "user", "content": json.dumps(msg)})
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try:
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response = client.messages.create(
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model=MODEL,
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system=sys_prompt,
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messages=messages,
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tools=tools,
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max_tokens=8000,
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)
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except Exception:
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break
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messages.append({"role": "assistant", "content": response.content})
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if response.stop_reason != "tool_use":
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break
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results = []
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for block in response.content:
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if block.type == "tool_use":
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output = self._exec(name, block.name, block.input)
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print(f" [{name}] {block.name}: {str(output)[:120]}")
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results.append({
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"type": "tool_result",
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"tool_use_id": block.id,
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"content": str(output),
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})
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messages.append({"role": "user", "content": results})
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member = self._find_member(name)
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if member and member["status"] != "shutdown":
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member["status"] = "idle"
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self._save_config()
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def _exec(self, sender: str, tool_name: str, args: dict) -> str:
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# these base tools are unchanged from s02
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if tool_name == "bash":
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return _run_bash(args["command"])
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if tool_name == "read_file":
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return _run_read(args["path"])
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if tool_name == "write_file":
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return _run_write(args["path"], args["content"])
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if tool_name == "edit_file":
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return _run_edit(args["path"], args["old_text"], args["new_text"])
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if tool_name == "send_message":
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return BUS.send(sender, args["to"], args["content"], args.get("msg_type", "message"))
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if tool_name == "read_inbox":
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return json.dumps(BUS.read_inbox(sender), indent=2)
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return f"Unknown tool: {tool_name}"
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def _teammate_tools(self) -> list:
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# these base tools are unchanged from s02
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return [
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{"name": "bash", "description": "Run a shell command.",
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"input_schema": {"type": "object", "properties": {"command": {"type": "string"}}, "required": ["command"]}},
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{"name": "read_file", "description": "Read file contents.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}}, "required": ["path"]}},
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{"name": "write_file", "description": "Write content to file.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "content": {"type": "string"}}, "required": ["path", "content"]}},
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{"name": "edit_file", "description": "Replace exact text in file.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "old_text": {"type": "string"}, "new_text": {"type": "string"}}, "required": ["path", "old_text", "new_text"]}},
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{"name": "send_message", "description": "Send message to a teammate.",
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"input_schema": {"type": "object", "properties": {"to": {"type": "string"}, "content": {"type": "string"}, "msg_type": {"type": "string", "enum": list(VALID_MSG_TYPES)}}, "required": ["to", "content"]}},
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{"name": "read_inbox", "description": "Read and drain your inbox.",
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"input_schema": {"type": "object", "properties": {}}},
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]
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def list_all(self) -> str:
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if not self.config["members"]:
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return "No teammates."
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lines = [f"Team: {self.config['team_name']}"]
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for m in self.config["members"]:
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lines.append(f" {m['name']} ({m['role']}): {m['status']}")
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return "\n".join(lines)
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def member_names(self) -> list:
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return [m["name"] for m in self.config["members"]]
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TEAM = TeammateManager(TEAM_DIR)
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# -- Base tool implementations (these base tools are unchanged from s02) --
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def _safe_path(p: str) -> Path:
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path = (WORKDIR / p).resolve()
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if not path.is_relative_to(WORKDIR):
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raise ValueError(f"Path escapes workspace: {p}")
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return path
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def _run_bash(command: str) -> str:
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dangerous = ["rm -rf /", "sudo", "shutdown", "reboot"]
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if any(d in command for d in dangerous):
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return "Error: Dangerous command blocked"
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try:
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r = subprocess.run(
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command, shell=True, cwd=WORKDIR,
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capture_output=True, text=True, timeout=120,
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)
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out = (r.stdout + r.stderr).strip()
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return out[:50000] if out else "(no output)"
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except subprocess.TimeoutExpired:
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return "Error: Timeout (120s)"
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def _run_read(path: str, limit: int = None) -> str:
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try:
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lines = _safe_path(path).read_text().splitlines()
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if limit and limit < len(lines):
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lines = lines[:limit] + [f"... ({len(lines) - limit} more)"]
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return "\n".join(lines)[:50000]
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except Exception as e:
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return f"Error: {e}"
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def _run_write(path: str, content: str) -> str:
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try:
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fp = _safe_path(path)
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fp.parent.mkdir(parents=True, exist_ok=True)
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fp.write_text(content)
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return f"Wrote {len(content)} bytes"
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except Exception as e:
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return f"Error: {e}"
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def _run_edit(path: str, old_text: str, new_text: str) -> str:
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try:
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fp = _safe_path(path)
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c = fp.read_text()
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if old_text not in c:
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return f"Error: Text not found in {path}"
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fp.write_text(c.replace(old_text, new_text, 1))
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return f"Edited {path}"
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except Exception as e:
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return f"Error: {e}"
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# -- Lead tool dispatch (9 tools) --
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TOOL_HANDLERS = {
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"bash": lambda **kw: _run_bash(kw["command"]),
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"read_file": lambda **kw: _run_read(kw["path"], kw.get("limit")),
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"write_file": lambda **kw: _run_write(kw["path"], kw["content"]),
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"edit_file": lambda **kw: _run_edit(kw["path"], kw["old_text"], kw["new_text"]),
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"spawn_teammate": lambda **kw: TEAM.spawn(kw["name"], kw["role"], kw["prompt"]),
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"list_teammates": lambda **kw: TEAM.list_all(),
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"send_message": lambda **kw: BUS.send("lead", kw["to"], kw["content"], kw.get("msg_type", "message")),
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"read_inbox": lambda **kw: json.dumps(BUS.read_inbox("lead"), indent=2),
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"broadcast": lambda **kw: BUS.broadcast("lead", kw["content"], TEAM.member_names()),
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}
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# these base tools are unchanged from s02
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TOOLS = [
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{"name": "bash", "description": "Run a shell command.",
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"input_schema": {"type": "object", "properties": {"command": {"type": "string"}}, "required": ["command"]}},
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{"name": "read_file", "description": "Read file contents.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "limit": {"type": "integer"}}, "required": ["path"]}},
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{"name": "write_file", "description": "Write content to file.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "content": {"type": "string"}}, "required": ["path", "content"]}},
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{"name": "edit_file", "description": "Replace exact text in file.",
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"input_schema": {"type": "object", "properties": {"path": {"type": "string"}, "old_text": {"type": "string"}, "new_text": {"type": "string"}}, "required": ["path", "old_text", "new_text"]}},
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{"name": "spawn_teammate", "description": "Spawn a persistent teammate that runs in its own thread.",
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"input_schema": {"type": "object", "properties": {"name": {"type": "string"}, "role": {"type": "string"}, "prompt": {"type": "string"}}, "required": ["name", "role", "prompt"]}},
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{"name": "list_teammates", "description": "List all teammates with name, role, status.",
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"input_schema": {"type": "object", "properties": {}}},
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{"name": "send_message", "description": "Send a message to a teammate's inbox.",
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"input_schema": {"type": "object", "properties": {"to": {"type": "string"}, "content": {"type": "string"}, "msg_type": {"type": "string", "enum": list(VALID_MSG_TYPES)}}, "required": ["to", "content"]}},
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{"name": "read_inbox", "description": "Read and drain the lead's inbox.",
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"input_schema": {"type": "object", "properties": {}}},
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{"name": "broadcast", "description": "Send a message to all teammates.",
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"input_schema": {"type": "object", "properties": {"content": {"type": "string"}}, "required": ["content"]}},
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]
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def agent_loop(messages: list):
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while True:
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inbox = BUS.read_inbox("lead")
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if inbox:
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messages.append({
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"role": "user",
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"content": f"<inbox>{json.dumps(inbox, indent=2)}</inbox>",
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})
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messages.append({
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"role": "assistant",
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"content": "Noted inbox messages.",
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})
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response = client.messages.create(
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model=MODEL,
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system=SYSTEM,
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messages=messages,
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tools=TOOLS,
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max_tokens=8000,
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)
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messages.append({"role": "assistant", "content": response.content})
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if response.stop_reason != "tool_use":
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return
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results = []
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for block in response.content:
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if block.type == "tool_use":
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handler = TOOL_HANDLERS.get(block.name)
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try:
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output = handler(**block.input) if handler else f"Unknown tool: {block.name}"
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except Exception as e:
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output = f"Error: {e}"
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print(f"> {block.name}: {str(output)[:200]}")
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results.append({
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"type": "tool_result",
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"tool_use_id": block.id,
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"content": str(output),
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})
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messages.append({"role": "user", "content": results})
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if __name__ == "__main__":
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history = []
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while True:
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try:
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query = input("\033[36ms09 >> \033[0m")
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except (EOFError, KeyboardInterrupt):
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break
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if query.strip().lower() in ("q", "exit", ""):
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break
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if query.strip() == "/team":
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print(TEAM.list_all())
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continue
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if query.strip() == "/inbox":
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print(json.dumps(BUS.read_inbox("lead"), indent=2))
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continue
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history.append({"role": "user", "content": query})
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agent_loop(history)
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print()
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