analysis_claude_code/agents/s09_agent_teams.py
CrazyBoyM a9c71002d2 the model is the agent, the code is the harness
Comprehensive rewrite establishing the harness engineering narrative
across the entire repository.

README (EN/ZH/JA): added "The Model IS the Agent" manifesto with
historical proof (DQN, OpenAI Five, AlphaStar, Tencent Jueyu),
"What an Agent Is NOT" critique, harness engineer role definition,
"Why Claude Code" as masterclass in harness design, and universe
vision. Consistent framing: model = driver, harness = vehicle.

docs (36 files, 3 languages): injected one-line "Harness layer"
callout after the motto in every session document (s01-s12).

agents (13 Python files): added harness framing comment before
each module docstring.

skills/agent-philosophy.md: full rewrite aligned with harness
narrative.
2026-03-18 01:19:34 +08:00

407 lines
17 KiB
Python

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