How to Build an AI Agent
How to Build an AI Agent
s11

Autonomous Agents

Collaboration

Scan Board, Claim Tasks

499 LOC14 toolsTask board polling + timeout-based self-governance
Teammates scan the board and claim tasks themselves; no need for the lead to assign each one

s01 > s02 > s03 > s04 > s05 > s06 | s07 > s08 > s09 > s10 > [ s11 ] s12

"Teammates scan the board and claim tasks themselves" -- no need for the lead to assign each one.

Problem

In s09-s10, teammates only work when explicitly told to. The lead must spawn each one with a specific prompt. 10 unclaimed tasks on the board? The lead assigns each one manually. Doesn't scale.

True autonomy: teammates scan the task board themselves, claim unclaimed tasks, work on them, then look for more.

One subtlety: after context compression (s06), the agent might forget who it is. Identity re-injection fixes this.

Solution

Teammate lifecycle with idle cycle:

+-------+
| spawn |
+---+---+
    |
    v
+-------+   tool_use     +-------+
| WORK  | <------------- |  LLM  |
+---+---+                +-------+
    |
    | stop_reason != tool_use (or idle tool called)
    v
+--------+
|  IDLE  |  poll every 5s for up to 60s
+---+----+
    |
    +---> check inbox --> message? ----------> WORK
    |
    +---> scan .tasks/ --> unclaimed? -------> claim -> WORK
    |
    +---> 60s timeout ----------------------> SHUTDOWN

Identity re-injection after compression:
  if len(messages) <= 3:
    messages.insert(0, identity_block)

How It Works

  1. The teammate loop has two phases: WORK and IDLE. When the LLM stops calling tools (or calls idle), the teammate enters IDLE.
def _loop(self, name, role, prompt):
    while True:
        # -- WORK PHASE --
        messages = [{"role": "user", "content": prompt}]
        for _ in range(50):
            response = client.messages.create(...)
            if response.stop_reason != "tool_use":
                break
            # execute tools...
            if idle_requested:
                break

        # -- IDLE PHASE --
        self._set_status(name, "idle")
        resume = self._idle_poll(name, messages)
        if not resume:
            self._set_status(name, "shutdown")
            return
        self._set_status(name, "working")
  1. The idle phase polls inbox and task board in a loop.
def _idle_poll(self, name, messages):
    for _ in range(IDLE_TIMEOUT // POLL_INTERVAL):  # 60s / 5s = 12
        time.sleep(POLL_INTERVAL)
        inbox = BUS.read_inbox(name)
        if inbox:
            messages.append({"role": "user",
                "content": f"<inbox>{inbox}</inbox>"})
            return True
        unclaimed = scan_unclaimed_tasks()
        if unclaimed:
            claim_task(unclaimed[0]["id"], name)
            messages.append({"role": "user",
                "content": f"<auto-claimed>Task #{unclaimed[0]['id']}: "
                           f"{unclaimed[0]['subject']}</auto-claimed>"})
            return True
    return False  # timeout -> shutdown
  1. Task board scanning: find pending, unowned, unblocked tasks.
def scan_unclaimed_tasks() -> list:
    unclaimed = []
    for f in sorted(TASKS_DIR.glob("task_*.json")):
        task = json.loads(f.read_text())
        if (task.get("status") == "pending"
                and not task.get("owner")
                and not task.get("blockedBy")):
            unclaimed.append(task)
    return unclaimed
  1. Identity re-injection: when context is too short (compression happened), insert an identity block.
if len(messages) <= 3:
    messages.insert(0, {"role": "user",
        "content": f"<identity>You are '{name}', role: {role}, "
                   f"team: {team_name}. Continue your work.</identity>"})
    messages.insert(1, {"role": "assistant",
        "content": f"I am {name}. Continuing."})

What Changed From s10

ComponentBefore (s10)After (s11)
Tools1214 (+idle, +claim_task)
AutonomyLead-directedSelf-organizing
Idle phaseNonePoll inbox + task board
Task claimingManual onlyAuto-claim unclaimed tasks
IdentitySystem prompt+ re-injection after compress
TimeoutNone60s idle -> auto shutdown

Try It

python agents/s11_autonomous_agents.py
  1. Create 3 tasks on the board, then spawn alice and bob. Watch them auto-claim.
  2. Spawn a coder teammate and let it find work from the task board itself
  3. Create tasks with dependencies. Watch teammates respect the blocked order.
  4. Type /tasks to see the task board with owners
  5. Type /team to monitor who is working vs idle