mirror of
https://github.com/NousResearch/hermes-agent.git
synced 2026-07-21 16:18:55 +00:00
7d27a31ce7
Add the flag-gated compute-host supervisor, delta/control protocol, PPID orphan guard, inline fail-open path, synthetic GIL-heavy turn seam, and AC-4 certify harness. Verified on current origin/main: 343 focused tests pass; Ruff and diff checks pass; 360s AC-4 run with six heavy lanes passes at 6.11ms serving p99 with zero stalls and valid load. Co-authored-by: Kyzcreig <9063726+Kyzcreig@users.noreply.github.com>
681 lines
26 KiB
Python
681 lines
26 KiB
Python
"""Persistent dashboard compute-host process.
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Phase 0 used this module as a deterministic line-JSON spike. Phase 1 keeps the
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same transport and turns it into the long-lived child that owns live AIAgent
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objects when ``dashboard.turn_isolation`` is enabled.
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"""
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from __future__ import annotations
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import argparse
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import concurrent.futures
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import json
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import os
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import signal
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import subprocess
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import sys
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import threading
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import time
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import uuid
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from dataclasses import dataclass, field
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from pathlib import Path
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from typing import Any, Callable
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def now_ns() -> int:
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return time.perf_counter_ns()
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@dataclass
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class SpikeAgent:
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"""A deterministic AIAgent-shaped object for pipe/interrupt measurements."""
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session_id: str
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history: list[dict[str, str]] = field(default_factory=list)
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_interrupt: threading.Event = field(default_factory=threading.Event)
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def clear_interrupt(self) -> None:
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self._interrupt.clear()
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def interrupt(self) -> None:
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self._interrupt.set()
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def run_conversation(
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self,
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prompt: str,
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*,
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conversation_history: list[dict[str, str]] | None = None,
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stream_callback: Callable[[str], None] | None = None,
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delta_count: int = 24,
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delay_s: float = 0.001,
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) -> dict[str, Any]:
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base_history = list(conversation_history if conversation_history is not None else self.history)
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chunks: list[str] = []
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interrupted = False
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for index in range(max(0, int(delta_count))):
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if self._interrupt.is_set():
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interrupted = True
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break
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chunk = f"{self.session_id}:{prompt}:{index:04d} "
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chunks.append(chunk)
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if stream_callback is not None:
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stream_callback(chunk)
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if delay_s > 0:
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time.sleep(delay_s)
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if self._interrupt.is_set():
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interrupted = True
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final = "".join(chunks)
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if interrupted:
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final += "[interrupted]"
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messages = [
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*base_history,
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{"role": "user", "content": prompt},
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{"role": "assistant", "content": final},
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]
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self.history = messages
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return {"final_response": final, "messages": messages, "interrupted": interrupted}
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@dataclass
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class HostSession:
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sid: str
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agent: SpikeAgent
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history_version: int = 0
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running: bool = False
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lock: threading.Lock = field(default_factory=threading.Lock)
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class _HostTransport:
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def __init__(self, emit: Callable[[dict[str, Any]], None]) -> None:
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self._emit = emit
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def write(self, obj: dict) -> bool:
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sid = ""
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try:
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if obj.get("method") == "event":
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sid = str(((obj.get("params") or {}).get("session_id")) or "")
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except Exception:
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sid = ""
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self._emit({"type": "rpc", "sid": sid, "message": obj})
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return True
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def close(self) -> None:
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return None
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def _repo_root() -> Path:
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return Path(__file__).resolve().parents[1]
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def _build_sha() -> str:
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try:
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return subprocess.check_output(
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["git", "rev-parse", "HEAD"],
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cwd=str(_repo_root()),
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text=True,
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stderr=subprocess.DEVNULL,
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timeout=2,
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).strip()
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except Exception:
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return "unknown"
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class ComputeHost:
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def __init__(
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self,
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*,
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stdout: Any = None,
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max_workers: int | None = None,
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heartbeat_secs: int | float | None = None,
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) -> None:
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self._stdout = stdout or sys.stdout
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self._write_lock = threading.Lock()
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self._sessions: dict[str, HostSession] = {}
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self._executor = concurrent.futures.ThreadPoolExecutor(
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max_workers=max_workers or _default_workers(),
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thread_name_prefix="compute-host-turn",
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)
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self._closed = threading.Event()
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self._parent_pid = os.getppid()
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self._boot_id = uuid.uuid4().hex
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self._progress_counter = 0
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self._progress_lock = threading.Lock()
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self._turn_futures: set[concurrent.futures.Future] = set()
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self._turn_futures_lock = threading.Lock()
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self._transport = _HostTransport(self.emit)
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self._heartbeat_secs = (
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float(heartbeat_secs)
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if heartbeat_secs is not None
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else float(os.environ.get("HERMES_COMPUTE_HOST_HEARTBEAT_SECS") or "15")
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)
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if self._heartbeat_secs > 0:
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threading.Thread(target=self._heartbeat_loop, name="compute-host-heartbeat", daemon=True).start()
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threading.Thread(target=self._parent_guard_loop, name="compute-host-ppid-guard", daemon=True).start()
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def emit(self, frame: dict[str, Any]) -> None:
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frame.setdefault("host_ns", now_ns())
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data = json.dumps(frame, separators=(",", ":"), ensure_ascii=False)
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with self._write_lock:
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print(data, file=self._stdout, flush=True)
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def close(self) -> None:
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self._closed.set()
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self._executor.shutdown(wait=False, cancel_futures=True)
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def shutdown(self, *, reason: str = "shutdown", wait: float = 10.0) -> None:
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self._closed.set()
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self.flush_all_sessions(reason=reason)
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deadline = time.monotonic() + max(0.0, wait)
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while time.monotonic() < deadline:
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with self._turn_futures_lock:
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pending = [f for f in self._turn_futures if not f.done()]
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if not pending:
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break
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time.sleep(0.05)
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self._executor.shutdown(wait=False, cancel_futures=True)
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def flush_all_sessions(self, *, reason: str = "shutdown") -> None:
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try:
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from tui_gateway import server
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except Exception:
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return
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for session in list(getattr(server, "_sessions", {}).values()):
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try:
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server._finalize_session(session, end_reason=f"compute_host_{reason}")
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except Exception:
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pass
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def handle_frame(self, frame: dict[str, Any]) -> None:
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kind = str(frame.get("type") or "")
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if kind == "session.seed":
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self._handle_seed(frame)
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elif kind == "turn.start":
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self._handle_turn_start(frame)
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elif kind == "interrupt":
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self._handle_interrupt(frame)
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elif kind == "reload_mcp":
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self._handle_reload_mcp(frame)
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elif kind == "control":
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self._handle_control(frame)
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elif kind == "shutdown":
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self.emit({"type": "shutdown.ack", "request_id": frame.get("request_id")})
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# Explicit supervisor/test shutdown is a clean child-process close;
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# SIGTERM and orphan paths are the durability flush paths.
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self._closed.set()
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self._executor.shutdown(wait=False, cancel_futures=True)
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else:
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self.emit(
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{
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"type": "error",
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"request_id": frame.get("request_id"),
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"message": f"unknown frame type: {kind}",
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}
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)
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# ── Phase-0 deterministic spike frames ─────────────────────────────
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def _handle_seed(self, frame: dict[str, Any]) -> None:
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sid = str(frame.get("sid") or "")
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if not sid:
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self.emit({"type": "error", "request_id": frame.get("request_id"), "message": "sid required"})
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return
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history = frame.get("history")
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if not isinstance(history, list):
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history = []
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self._sessions[sid] = HostSession(sid=sid, agent=SpikeAgent(sid, list(history)))
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self.emit({"type": "session.seeded", "sid": sid, "request_id": frame.get("request_id")})
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def _handle_turn_start(self, frame: dict[str, Any]) -> None:
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sid = str(frame.get("sid") or "")
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if sid in self._sessions:
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self._handle_spike_turn_start(frame)
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return
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future = self._executor.submit(self._run_real_turn, dict(frame))
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with self._turn_futures_lock:
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self._turn_futures.add(future)
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future.add_done_callback(self._turn_futures.discard)
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def _handle_spike_turn_start(self, frame: dict[str, Any]) -> None:
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sid = str(frame.get("sid") or "")
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session = self._sessions.get(sid)
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if session is None:
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self.emit({"type": "turn.error", "sid": sid, "request_id": frame.get("request_id"), "message": "unknown session"})
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return
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with session.lock:
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if session.running:
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self.emit({"type": "turn.error", "sid": sid, "request_id": frame.get("request_id"), "message": "session busy"})
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return
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session.running = True
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future = self._executor.submit(self._run_spike_turn, session, dict(frame))
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with self._turn_futures_lock:
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self._turn_futures.add(future)
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future.add_done_callback(self._turn_futures.discard)
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def _handle_interrupt(self, frame: dict[str, Any]) -> None:
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sid = str(frame.get("sid") or "")
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spike = self._sessions.get(sid)
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if spike is not None:
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spike.agent.interrupt()
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self.emit(
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{
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"type": "interrupt.ack",
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"sid": sid,
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"request_id": frame.get("request_id"),
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"applied": True,
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"applied_ns": now_ns(),
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}
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)
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return
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try:
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from tui_gateway import server
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session = server._sessions.get(sid)
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if session is None:
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self.emit({"type": "interrupt.ack", "sid": sid, "request_id": frame.get("request_id"), "applied": False})
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return
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agent = session.get("agent")
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if agent is not None and hasattr(agent, "interrupt"):
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agent.interrupt()
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with session.get("history_lock", threading.Lock()):
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session["_turn_cancel_requested"] = True
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session["queued_prompt"] = None
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self.emit({"type": "interrupt.ack", "sid": sid, "request_id": frame.get("request_id"), "applied": True, "applied_ns": now_ns()})
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except Exception as exc:
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self.emit({"type": "interrupt.ack", "sid": sid, "request_id": frame.get("request_id"), "applied": False, "message": str(exc)})
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def _run_spike_turn(self, session: HostSession, frame: dict[str, Any]) -> None:
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request_id = frame.get("request_id") or uuid.uuid4().hex
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prompt = str(frame.get("prompt") or frame.get("text") or "")
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try:
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delta_count = int(frame.get("delta_count", 24))
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except (TypeError, ValueError):
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delta_count = 24
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try:
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delay_s = float(frame.get("delay_s", 0.001))
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except (TypeError, ValueError):
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delay_s = 0.001
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with session.lock:
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history = list(session.agent.history)
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session.agent.clear_interrupt()
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self.emit({"type": "turn.started", "sid": session.sid, "request_id": request_id, "started_ns": now_ns()})
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def stream(delta: str) -> None:
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self._bump_progress()
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self.emit(
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{
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"type": "delta",
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"sid": session.sid,
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"request_id": request_id,
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"text": delta,
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"emitted_ns": now_ns(),
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}
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)
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try:
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result = session.agent.run_conversation(
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prompt,
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conversation_history=history,
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stream_callback=stream,
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delta_count=delta_count,
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delay_s=delay_s,
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)
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with session.lock:
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session.history_version += 1
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session.running = False
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history_version = session.history_version
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self._bump_progress()
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self.emit(
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{
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"type": "turn.end",
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"sid": session.sid,
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"request_id": request_id,
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"history_version": history_version,
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"message_count": len(result.get("messages") or []),
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"interrupted": bool(result.get("interrupted")),
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"ended_ns": now_ns(),
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}
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)
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except Exception as exc: # pragma: no cover - defensive host boundary
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with session.lock:
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session.running = False
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self.emit({"type": "turn.error", "sid": session.sid, "request_id": request_id, "message": str(exc)})
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# ── Real dashboard turn path ───────────────────────────────────────
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def _run_real_turn(self, frame: dict[str, Any]) -> None:
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sid = str(frame.get("sid") or "")
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request_id = str(frame.get("request_id") or uuid.uuid4().hex)
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if not sid:
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self.emit({"type": "turn.error", "sid": sid, "request_id": request_id, "message": "sid required"})
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return
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try:
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from tui_gateway import server
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session = self._ensure_server_session(server, frame)
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with session["history_lock"]:
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if session.get("running"):
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self.emit({"type": "turn.error", "sid": sid, "request_id": request_id, "message": "session busy"})
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return
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session["running"] = True
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session["_turn_cancel_requested"] = False
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session["last_active"] = time.time()
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server._start_inflight_turn(session, frame.get("text") if "text" in frame else frame.get("prompt"))
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self.emit({"type": "turn.started", "sid": sid, "request_id": request_id, "started_ns": now_ns()})
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try:
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server._ensure_session_db_row(session)
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except Exception:
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pass
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try:
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import hermes_undo
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hermes_undo.on_user_message_appended(session["session_key"])
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except Exception:
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pass
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try:
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server._persist_branch_seed(session)
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except Exception:
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pass
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text = frame.get("text") if "text" in frame else frame.get("prompt", "")
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server._run_prompt_submit(request_id, sid, session, text)
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run_thread = session.get("_run_thread")
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if run_thread is not None and hasattr(run_thread, "join"):
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run_thread.join()
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with session["history_lock"]:
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history_version = int(session.get("history_version", 0))
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message_count = len(session.get("history") or [])
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interrupted = bool(session.get("_turn_cancel_requested"))
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session_key = str(session.get("session_key") or "")
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session_info = server._session_info(session.get("agent"), session)
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self._bump_progress()
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self.emit(
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{
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"type": "turn.end",
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"sid": sid,
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"request_id": request_id,
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"history_version": history_version,
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"session_key": session_key,
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"message_count": message_count,
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"interrupted": interrupted,
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"ended_ns": now_ns(),
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"session_info": session_info,
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"session_info_emitted": True,
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}
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)
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except Exception as exc:
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try:
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from tui_gateway import server
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session = server._sessions.get(sid)
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if session is not None:
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with session.get("history_lock", threading.Lock()):
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session["running"] = False
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server._clear_inflight_turn(session)
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except Exception:
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pass
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self.emit({"type": "turn.error", "sid": sid, "request_id": request_id, "reason": "exception", "message": str(exc)})
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def _ensure_server_session(self, server: Any, frame: dict[str, Any]) -> dict:
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sid = str(frame.get("sid") or "")
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key = str(frame.get("session_key") or sid)
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session = server._sessions.get(sid)
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if session is not None:
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session["transport"] = self._transport
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if frame.get("cols") is not None:
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session["cols"] = int(frame.get("cols") or 80)
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if frame.get("cwd"):
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session["cwd"] = str(frame.get("cwd"))
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if frame.get("profile_home"):
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session["profile_home"] = str(frame.get("profile_home"))
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if isinstance(frame.get("attached_images"), list):
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session["attached_images"] = list(frame.get("attached_images") or [])
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return session
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history = frame.get("history") if isinstance(frame.get("history"), list) else []
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profile_home = str(frame.get("profile_home") or "")
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session_db = None
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home_token = None
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try:
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if profile_home:
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from hermes_constants import set_hermes_home_override
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from hermes_state import SessionDB
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home_token = set_hermes_home_override(profile_home)
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session_db = SessionDB(db_path=Path(profile_home) / "state.db")
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agent = server._make_agent(
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sid,
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key,
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session_id=key,
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model_override=frame.get("model_override"),
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reasoning_config_override=frame.get("reasoning_config_override"),
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service_tier_override=frame.get("service_tier_override"),
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platform_override=frame.get("source"),
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session_db=session_db,
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)
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finally:
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if home_token is not None:
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try:
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from hermes_constants import reset_hermes_home_override
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reset_hermes_home_override(home_token)
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except Exception:
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pass
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try:
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from tui_gateway.transport import bind_transport, reset_transport
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token = bind_transport(self._transport)
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try:
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server._init_session(
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sid,
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key,
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agent,
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list(history),
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cols=int(frame.get("cols") or 80),
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cwd=str(frame.get("cwd") or "") or None,
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session_db=session_db,
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source=frame.get("source"),
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)
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finally:
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reset_transport(token)
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except Exception:
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# If _init_session's side machinery (slash worker, approval notify) is
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|
# unavailable, keep a minimal host-owned session rather than failing
|
|
# the turn after the expensive agent build succeeded.
|
|
server._sessions[sid] = {
|
|
"agent": agent,
|
|
"session_key": key,
|
|
"history": list(history),
|
|
"history_lock": threading.Lock(),
|
|
"history_version": int(frame.get("history_version") or 0),
|
|
"inflight_turn": None,
|
|
"created_at": time.time(),
|
|
"last_active": time.time(),
|
|
"running": False,
|
|
"attached_images": [],
|
|
"image_counter": 0,
|
|
"cwd": str(frame.get("cwd") or os.getcwd()),
|
|
"cols": int(frame.get("cols") or 80),
|
|
"slash_worker": None,
|
|
"show_reasoning": server._load_show_reasoning(),
|
|
"tool_progress_mode": server._load_tool_progress_mode(),
|
|
"edit_snapshots": {},
|
|
"tool_started_at": {},
|
|
"model_override": frame.get("model_override"),
|
|
"source": server._sanitize_client_source(frame.get("source")),
|
|
"transport": self._transport,
|
|
}
|
|
session = server._sessions[sid]
|
|
session["transport"] = self._transport
|
|
session["profile_home"] = profile_home or session.get("profile_home")
|
|
if isinstance(frame.get("attached_images"), list):
|
|
session["attached_images"] = list(frame.get("attached_images") or [])
|
|
if frame.get("model_override") is not None:
|
|
session["model_override"] = frame.get("model_override")
|
|
return session
|
|
|
|
def _handle_reload_mcp(self, frame: dict[str, Any]) -> None:
|
|
sid = str(frame.get("sid") or "")
|
|
request_id = frame.get("request_id")
|
|
try:
|
|
from tui_gateway import server
|
|
|
|
resp = server.handle_request({"id": request_id, "method": "reload.mcp", "params": {"session_id": sid, "confirm": True}})
|
|
self.emit({"type": "reload_mcp.ack", "sid": sid, "request_id": request_id, "response": resp})
|
|
except Exception as exc:
|
|
self.emit({"type": "control.error", "sid": sid, "request_id": request_id, "message": str(exc)})
|
|
|
|
def _handle_control(self, frame: dict[str, Any]) -> None:
|
|
sid = str(frame.get("sid") or "")
|
|
request_id = frame.get("request_id")
|
|
route_name = str(frame.get("route_name") or "")
|
|
try:
|
|
from tui_gateway import server
|
|
from tui_gateway.host_supervisor import MUTATOR_ROUTE_TABLE
|
|
|
|
route = MUTATOR_ROUTE_TABLE.get(route_name)
|
|
if route is None:
|
|
self.emit({"type": "control.error", "sid": sid, "request_id": request_id, "message": f"unclassified route: {route_name}"})
|
|
return
|
|
session = server._sessions.get(sid)
|
|
if session is None:
|
|
self.emit({"type": "control.error", "sid": sid, "request_id": request_id, "message": "session not found"})
|
|
return
|
|
if route == "idle-gated" and session.get("running"):
|
|
self.emit({"type": "control.error", "sid": sid, "request_id": request_id, "message": "session busy"})
|
|
return
|
|
if route_name == "reload.mcp":
|
|
self._handle_reload_mcp({**frame, "type": "reload_mcp"})
|
|
return
|
|
command = str(frame.get("command") or "")
|
|
output = ""
|
|
if command:
|
|
output = server._mirror_slash_side_effects(sid, session, command)
|
|
with session["history_lock"]:
|
|
history_version = int(session.get("history_version", 0))
|
|
message_count = len(session.get("history") or [])
|
|
session_key = str(session.get("session_key") or "")
|
|
self.emit(
|
|
{
|
|
"type": "control.ack",
|
|
"sid": sid,
|
|
"request_id": request_id,
|
|
"route_name": route_name,
|
|
"output": output,
|
|
"session_key": session_key,
|
|
"history_version": history_version,
|
|
"message_count": message_count,
|
|
"session_info": server._session_info(session.get("agent"), session),
|
|
}
|
|
)
|
|
except Exception as exc:
|
|
self.emit({"type": "control.error", "sid": sid, "request_id": request_id, "message": str(exc)})
|
|
|
|
def _bump_progress(self) -> None:
|
|
with self._progress_lock:
|
|
self._progress_counter += 1
|
|
|
|
def _heartbeat_loop(self) -> None:
|
|
while not self._closed.wait(self._heartbeat_secs):
|
|
with self._turn_futures_lock:
|
|
active_turns = sum(1 for f in self._turn_futures if not f.done())
|
|
with self._progress_lock:
|
|
counter = self._progress_counter
|
|
self.emit(
|
|
{
|
|
"type": "hb",
|
|
"active_turns": active_turns,
|
|
"progress_counter": counter,
|
|
"rss_mb": _rss_mb(os.getpid()),
|
|
}
|
|
)
|
|
|
|
def _parent_guard_loop(self) -> None:
|
|
while not self._closed.wait(1.0):
|
|
ppid = os.getppid()
|
|
if ppid in {0, 1} or (self._parent_pid and ppid != self._parent_pid):
|
|
self.emit({"type": "orphan", "old_ppid": self._parent_pid, "ppid": ppid})
|
|
self.shutdown(reason="orphan")
|
|
os._exit(0)
|
|
|
|
|
|
def _rss_mb(pid: int) -> float:
|
|
try:
|
|
out = subprocess.check_output(["ps", "-o", "rss=", "-p", str(pid)], text=True, stderr=subprocess.DEVNULL, timeout=2).strip()
|
|
return int(out.splitlines()[-1].strip()) / 1024.0 if out else 0.0
|
|
except Exception:
|
|
return 0.0
|
|
|
|
|
|
def _default_workers() -> int:
|
|
try:
|
|
return max(2, int(os.environ.get("HERMES_TUI_RPC_POOL_WORKERS") or "8"))
|
|
except (TypeError, ValueError):
|
|
return 8
|
|
|
|
|
|
def run_host(stdin: Any = None, stdout: Any = None) -> None:
|
|
os.environ["HERMES_COMPUTE_HOST_CHILD"] = "1"
|
|
stdin = stdin or sys.stdin
|
|
host = ComputeHost(stdout=stdout or sys.stdout)
|
|
shutting_down = threading.Event()
|
|
|
|
def _signal_handler(_signum, _frame) -> None:
|
|
if shutting_down.is_set():
|
|
return
|
|
shutting_down.set()
|
|
host.shutdown(reason="sigterm")
|
|
raise SystemExit(0)
|
|
|
|
try:
|
|
signal.signal(signal.SIGTERM, _signal_handler)
|
|
signal.signal(signal.SIGINT, _signal_handler)
|
|
except Exception:
|
|
pass
|
|
|
|
host.emit(
|
|
{
|
|
"type": "hello",
|
|
"host_pid": os.getpid(),
|
|
"boot_id": host._boot_id,
|
|
"build_sha": _build_sha(),
|
|
"cwd": os.getcwd(),
|
|
"hermes_home": os.environ.get("HERMES_HOME", ""),
|
|
}
|
|
)
|
|
|
|
def _reader() -> None:
|
|
for raw in stdin:
|
|
if host._closed.is_set():
|
|
break
|
|
try:
|
|
frame = json.loads(raw)
|
|
except json.JSONDecodeError as exc:
|
|
host.emit({"type": "error", "message": f"invalid json: {exc}"})
|
|
continue
|
|
if not isinstance(frame, dict):
|
|
host.emit({"type": "error", "message": "frame must be an object"})
|
|
continue
|
|
host.handle_frame(frame)
|
|
if frame.get("type") == "shutdown":
|
|
os._exit(0)
|
|
if host._closed.is_set():
|
|
break
|
|
|
|
reader = threading.Thread(target=_reader, name="compute-host-control-reader", daemon=True)
|
|
reader.start()
|
|
try:
|
|
while not host._closed.wait(0.2):
|
|
if not reader.is_alive():
|
|
break
|
|
finally:
|
|
host.shutdown(reason="stdin_closed", wait=2.0)
|
|
|
|
|
|
def main(argv: list[str] | None = None) -> int:
|
|
parser = argparse.ArgumentParser(description="Dashboard compute-host process")
|
|
parser.parse_args(argv)
|
|
run_host()
|
|
return 0
|
|
|
|
|
|
if __name__ == "__main__": # pragma: no cover
|
|
raise SystemExit(main())
|