e97c0cb578
* feat: GPT tool-use steering + strip budget warnings from history
Two changes to improve tool reliability, especially for OpenAI GPT models:
1. GPT tool-use enforcement prompt: Adds GPT_TOOL_USE_GUIDANCE to the
system prompt when the model name contains 'gpt' and tools are loaded.
This addresses a known behavioral pattern where GPT models describe
intended actions ('I will run the tests') instead of actually making
tool calls. Inspired by similar steering in OpenCode (beast.txt) and
Cline (GPT-5.1 variant).
2. Budget warning history stripping: Budget pressure warnings injected by
_get_budget_warning() into tool results are now stripped when
conversation history is replayed via run_conversation(). Previously,
these turn-scoped signals persisted across turns, causing models to
avoid tool calls in all subsequent messages after any turn that hit
the 70-90% iteration threshold.
* fix: replace hardcoded ~/.hermes paths with get_hermes_home() for profile support
Prep for the upcoming profiles feature — each profile is a separate
HERMES_HOME directory, so all paths must respect the env var.
Fixes:
- gateway/platforms/matrix.py: Matrix E2EE store was hardcoded to
~/.hermes/matrix/store, ignoring HERMES_HOME. Now uses
get_hermes_home() so each profile gets its own Matrix state.
- gateway/platforms/telegram.py: Two locations reading config.yaml via
Path.home()/.hermes instead of get_hermes_home(). DM topic thread_id
persistence and hot-reload would read the wrong config in a profile.
- tools/file_tools.py: Security path for hub index blocking was
hardcoded to ~/.hermes, would miss the actual profile's hub cache.
- hermes_cli/gateway.py: Service naming now uses the profile name
(hermes-gateway-coder) instead of a cryptic hash suffix. Extracted
_profile_suffix() helper shared by systemd and launchd.
- hermes_cli/gateway.py: Launchd plist path and Label now scoped per
profile (ai.hermes.gateway-coder.plist). Previously all profiles
would collide on the same plist file on macOS.
- hermes_cli/gateway.py: Launchd plist now includes HERMES_HOME in
EnvironmentVariables — was missing entirely, making custom
HERMES_HOME broken on macOS launchd (pre-existing bug).
- All launchctl commands in gateway.py, main.py, status.py updated
to use get_launchd_label() instead of hardcoded string.
Test fixes: DM topic tests now set HERMES_HOME env var alongside
Path.home() mock. Launchd test uses get_launchd_label() for expected
commands.
522 lines
24 KiB
Python
522 lines
24 KiB
Python
#!/usr/bin/env python3
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"""File Tools Module - LLM agent file manipulation tools."""
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import errno
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import json
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import logging
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import threading
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from tools.file_operations import ShellFileOperations
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from agent.redact import redact_sensitive_text
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logger = logging.getLogger(__name__)
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_EXPECTED_WRITE_ERRNOS = {errno.EACCES, errno.EPERM, errno.EROFS}
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def _is_expected_write_exception(exc: Exception) -> bool:
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"""Return True for expected write denials that should not hit error logs."""
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if isinstance(exc, PermissionError):
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return True
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if isinstance(exc, OSError) and exc.errno in _EXPECTED_WRITE_ERRNOS:
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return True
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return False
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_file_ops_lock = threading.Lock()
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_file_ops_cache: dict = {}
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# Track files read per task to detect re-read loops after context compression.
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# Per task_id we store:
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# "last_key": the key of the most recent read/search call (or None)
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# "consecutive": how many times that exact call has been repeated in a row
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# "read_history": set of (path, offset, limit) tuples for get_read_files_summary
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_read_tracker_lock = threading.Lock()
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_read_tracker: dict = {}
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def _get_file_ops(task_id: str = "default") -> ShellFileOperations:
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"""Get or create ShellFileOperations for a terminal environment.
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Respects the TERMINAL_ENV setting -- if the task_id doesn't have an
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environment yet, creates one using the configured backend (local, docker,
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modal, etc.) rather than always defaulting to local.
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Thread-safe: uses the same per-task creation locks as terminal_tool to
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prevent duplicate sandbox creation from concurrent tool calls.
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"""
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from tools.terminal_tool import (
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_active_environments, _env_lock, _create_environment,
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_get_env_config, _last_activity, _start_cleanup_thread,
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_creation_locks,
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_creation_locks_lock,
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)
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import time
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# Fast path: check cache -- but also verify the underlying environment
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# is still alive (it may have been killed by the cleanup thread).
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with _file_ops_lock:
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cached = _file_ops_cache.get(task_id)
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if cached is not None:
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with _env_lock:
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if task_id in _active_environments:
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_last_activity[task_id] = time.time()
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return cached
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else:
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# Environment was cleaned up -- invalidate stale cache entry
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with _file_ops_lock:
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_file_ops_cache.pop(task_id, None)
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# Need to ensure the environment exists before building file_ops.
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# Acquire per-task lock so only one thread creates the sandbox.
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with _creation_locks_lock:
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if task_id not in _creation_locks:
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_creation_locks[task_id] = threading.Lock()
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task_lock = _creation_locks[task_id]
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with task_lock:
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# Double-check: another thread may have created it while we waited
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with _env_lock:
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if task_id in _active_environments:
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_last_activity[task_id] = time.time()
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terminal_env = _active_environments[task_id]
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else:
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terminal_env = None
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if terminal_env is None:
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from tools.terminal_tool import _task_env_overrides
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config = _get_env_config()
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env_type = config["env_type"]
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overrides = _task_env_overrides.get(task_id, {})
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if env_type == "docker":
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image = overrides.get("docker_image") or config["docker_image"]
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elif env_type == "singularity":
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image = overrides.get("singularity_image") or config["singularity_image"]
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elif env_type == "modal":
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image = overrides.get("modal_image") or config["modal_image"]
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elif env_type == "daytona":
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image = overrides.get("daytona_image") or config["daytona_image"]
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else:
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image = ""
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cwd = overrides.get("cwd") or config["cwd"]
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logger.info("Creating new %s environment for task %s...", env_type, task_id[:8])
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container_config = None
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if env_type in ("docker", "singularity", "modal", "daytona"):
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container_config = {
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"container_cpu": config.get("container_cpu", 1),
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"container_memory": config.get("container_memory", 5120),
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"container_disk": config.get("container_disk", 51200),
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"container_persistent": config.get("container_persistent", True),
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"docker_volumes": config.get("docker_volumes", []),
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}
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ssh_config = None
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if env_type == "ssh":
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ssh_config = {
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"host": config.get("ssh_host", ""),
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"user": config.get("ssh_user", ""),
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"port": config.get("ssh_port", 22),
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"key": config.get("ssh_key", ""),
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"persistent": config.get("ssh_persistent", False),
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}
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local_config = None
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if env_type == "local":
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local_config = {
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"persistent": config.get("local_persistent", False),
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}
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terminal_env = _create_environment(
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env_type=env_type,
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image=image,
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cwd=cwd,
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timeout=config["timeout"],
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ssh_config=ssh_config,
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container_config=container_config,
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local_config=local_config,
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task_id=task_id,
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host_cwd=config.get("host_cwd"),
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)
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with _env_lock:
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_active_environments[task_id] = terminal_env
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_last_activity[task_id] = time.time()
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_start_cleanup_thread()
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logger.info("%s environment ready for task %s", env_type, task_id[:8])
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# Build file_ops from the (guaranteed live) environment and cache it
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file_ops = ShellFileOperations(terminal_env)
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with _file_ops_lock:
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_file_ops_cache[task_id] = file_ops
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return file_ops
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def clear_file_ops_cache(task_id: str = None):
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"""Clear the file operations cache."""
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with _file_ops_lock:
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if task_id:
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_file_ops_cache.pop(task_id, None)
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else:
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_file_ops_cache.clear()
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def read_file_tool(path: str, offset: int = 1, limit: int = 500, task_id: str = "default") -> str:
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"""Read a file with pagination and line numbers."""
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try:
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# Security: block direct reads of internal Hermes cache/index files
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# to prevent prompt injection via catalog or hub metadata files.
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import pathlib as _pathlib
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from hermes_constants import get_hermes_home as _get_hh
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_resolved = _pathlib.Path(path).expanduser().resolve()
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_hermes_home = _get_hh().resolve()
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_blocked_dirs = [
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_hermes_home / "skills" / ".hub" / "index-cache",
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_hermes_home / "skills" / ".hub",
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]
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for _blocked in _blocked_dirs:
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try:
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_resolved.relative_to(_blocked)
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return json.dumps({
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"error": (
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f"Access denied: {path} is an internal Hermes cache file "
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"and cannot be read directly to prevent prompt injection. "
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"Use the skills_list or skill_view tools instead."
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)
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})
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except ValueError:
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pass
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file_ops = _get_file_ops(task_id)
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result = file_ops.read_file(path, offset, limit)
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if result.content:
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result.content = redact_sensitive_text(result.content)
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result_dict = result.to_dict()
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# Track reads to detect *consecutive* re-read loops.
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# The counter resets whenever any other tool is called in between,
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# so only truly back-to-back identical reads trigger warnings/blocks.
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read_key = ("read", path, offset, limit)
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with _read_tracker_lock:
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task_data = _read_tracker.setdefault(task_id, {
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"last_key": None, "consecutive": 0, "read_history": set(),
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})
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task_data["read_history"].add((path, offset, limit))
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if task_data["last_key"] == read_key:
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task_data["consecutive"] += 1
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else:
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task_data["last_key"] = read_key
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task_data["consecutive"] = 1
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count = task_data["consecutive"]
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if count >= 4:
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# Hard block: stop returning content to break the loop
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return json.dumps({
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"error": (
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f"BLOCKED: You have read this exact file region {count} times in a row. "
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"The content has NOT changed. You already have this information. "
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"STOP re-reading and proceed with your task."
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),
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"path": path,
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"already_read": count,
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}, ensure_ascii=False)
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elif count >= 3:
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result_dict["_warning"] = (
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f"You have read this exact file region {count} times consecutively. "
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"The content has not changed since your last read. Use the information you already have. "
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"If you are stuck in a loop, stop reading and proceed with writing or responding."
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)
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return json.dumps(result_dict, ensure_ascii=False)
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except Exception as e:
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return json.dumps({"error": str(e)}, ensure_ascii=False)
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def get_read_files_summary(task_id: str = "default") -> list:
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"""Return a list of files read in this session for the given task.
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Used by context compression to preserve file-read history across
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compression boundaries.
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"""
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with _read_tracker_lock:
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task_data = _read_tracker.get(task_id, {})
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read_history = task_data.get("read_history", set())
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seen_paths: dict = {}
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for (path, offset, limit) in read_history:
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if path not in seen_paths:
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seen_paths[path] = []
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seen_paths[path].append(f"lines {offset}-{offset + limit - 1}")
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return [
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{"path": p, "regions": regions}
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for p, regions in sorted(seen_paths.items())
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]
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def clear_read_tracker(task_id: str = None):
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"""Clear the read tracker.
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Call with a task_id to clear just that task, or without to clear all.
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Should be called when a session is destroyed to prevent memory leaks
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in long-running gateway processes.
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"""
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with _read_tracker_lock:
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if task_id:
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_read_tracker.pop(task_id, None)
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else:
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_read_tracker.clear()
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def notify_other_tool_call(task_id: str = "default"):
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"""Reset consecutive read/search counter for a task.
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Called by the tool dispatcher (model_tools.py) whenever a tool OTHER
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than read_file / search_files is executed. This ensures we only warn
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or block on *truly consecutive* repeated reads — if the agent does
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anything else in between (write, patch, terminal, etc.) the counter
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resets and the next read is treated as fresh.
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"""
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with _read_tracker_lock:
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task_data = _read_tracker.get(task_id)
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if task_data:
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task_data["last_key"] = None
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task_data["consecutive"] = 0
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def write_file_tool(path: str, content: str, task_id: str = "default") -> str:
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"""Write content to a file."""
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try:
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file_ops = _get_file_ops(task_id)
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result = file_ops.write_file(path, content)
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return json.dumps(result.to_dict(), ensure_ascii=False)
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except Exception as e:
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if _is_expected_write_exception(e):
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logger.debug("write_file expected denial: %s: %s", type(e).__name__, e)
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else:
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logger.error("write_file error: %s: %s", type(e).__name__, e, exc_info=True)
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return json.dumps({"error": str(e)}, ensure_ascii=False)
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def patch_tool(mode: str = "replace", path: str = None, old_string: str = None,
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new_string: str = None, replace_all: bool = False, patch: str = None,
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task_id: str = "default") -> str:
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"""Patch a file using replace mode or V4A patch format."""
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try:
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file_ops = _get_file_ops(task_id)
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if mode == "replace":
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if not path:
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return json.dumps({"error": "path required"})
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if old_string is None or new_string is None:
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return json.dumps({"error": "old_string and new_string required"})
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result = file_ops.patch_replace(path, old_string, new_string, replace_all)
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elif mode == "patch":
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if not patch:
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return json.dumps({"error": "patch content required"})
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result = file_ops.patch_v4a(patch)
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else:
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return json.dumps({"error": f"Unknown mode: {mode}"})
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result_dict = result.to_dict()
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result_json = json.dumps(result_dict, ensure_ascii=False)
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# Hint when old_string not found — saves iterations where the agent
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# retries with stale content instead of re-reading the file.
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if result_dict.get("error") and "Could not find" in str(result_dict["error"]):
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result_json += "\n\n[Hint: old_string not found. Use read_file to verify the current content, or search_files to locate the text.]"
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return result_json
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except Exception as e:
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return json.dumps({"error": str(e)}, ensure_ascii=False)
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def search_tool(pattern: str, target: str = "content", path: str = ".",
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file_glob: str = None, limit: int = 50, offset: int = 0,
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output_mode: str = "content", context: int = 0,
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task_id: str = "default") -> str:
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"""Search for content or files."""
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try:
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# Track searches to detect *consecutive* repeated search loops.
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# Include pagination args so users can page through truncated
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# results without tripping the repeated-search guard.
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search_key = (
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"search",
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pattern,
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target,
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str(path),
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file_glob or "",
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limit,
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offset,
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)
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with _read_tracker_lock:
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task_data = _read_tracker.setdefault(task_id, {
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"last_key": None, "consecutive": 0, "read_history": set(),
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})
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if task_data["last_key"] == search_key:
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task_data["consecutive"] += 1
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else:
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task_data["last_key"] = search_key
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task_data["consecutive"] = 1
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count = task_data["consecutive"]
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if count >= 4:
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return json.dumps({
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"error": (
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f"BLOCKED: You have run this exact search {count} times in a row. "
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"The results have NOT changed. You already have this information. "
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"STOP re-searching and proceed with your task."
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),
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"pattern": pattern,
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"already_searched": count,
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}, ensure_ascii=False)
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file_ops = _get_file_ops(task_id)
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result = file_ops.search(
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pattern=pattern, path=path, target=target, file_glob=file_glob,
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limit=limit, offset=offset, output_mode=output_mode, context=context
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)
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if hasattr(result, 'matches'):
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for m in result.matches:
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if hasattr(m, 'content') and m.content:
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m.content = redact_sensitive_text(m.content)
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result_dict = result.to_dict()
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if count >= 3:
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result_dict["_warning"] = (
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f"You have run this exact search {count} times consecutively. "
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"The results have not changed. Use the information you already have."
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)
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result_json = json.dumps(result_dict, ensure_ascii=False)
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# Hint when results were truncated — explicit next offset is clearer
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# than relying on the model to infer it from total_count vs match count.
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if result_dict.get("truncated"):
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next_offset = offset + limit
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result_json += f"\n\n[Hint: Results truncated. Use offset={next_offset} to see more, or narrow with a more specific pattern or file_glob.]"
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return result_json
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except Exception as e:
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return json.dumps({"error": str(e)}, ensure_ascii=False)
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FILE_TOOLS = [
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{"name": "read_file", "function": read_file_tool},
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{"name": "write_file", "function": write_file_tool},
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{"name": "patch", "function": patch_tool},
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{"name": "search_files", "function": search_tool}
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]
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def get_file_tools():
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"""Get the list of file tool definitions."""
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return FILE_TOOLS
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# ---------------------------------------------------------------------------
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# Schemas + Registry
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# ---------------------------------------------------------------------------
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from tools.registry import registry
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def _check_file_reqs():
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"""Lazy wrapper to avoid circular import with tools/__init__.py."""
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from tools import check_file_requirements
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return check_file_requirements()
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READ_FILE_SCHEMA = {
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"name": "read_file",
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"description": "Read a text file with line numbers and pagination. Use this instead of cat/head/tail in terminal. Output format: 'LINE_NUM|CONTENT'. Suggests similar filenames if not found. Use offset and limit for large files. NOTE: Cannot read images or binary files — use vision_analyze for images.",
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"parameters": {
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"type": "object",
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"properties": {
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"path": {"type": "string", "description": "Path to the file to read (absolute, relative, or ~/path)"},
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"offset": {"type": "integer", "description": "Line number to start reading from (1-indexed, default: 1)", "default": 1, "minimum": 1},
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"limit": {"type": "integer", "description": "Maximum number of lines to read (default: 500, max: 2000)", "default": 500, "maximum": 2000}
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},
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|
"required": ["path"]
|
|
}
|
|
}
|
|
|
|
WRITE_FILE_SCHEMA = {
|
|
"name": "write_file",
|
|
"description": "Write content to a file, completely replacing existing content. Use this instead of echo/cat heredoc in terminal. Creates parent directories automatically. OVERWRITES the entire file — use 'patch' for targeted edits.",
|
|
"parameters": {
|
|
"type": "object",
|
|
"properties": {
|
|
"path": {"type": "string", "description": "Path to the file to write (will be created if it doesn't exist, overwritten if it does)"},
|
|
"content": {"type": "string", "description": "Complete content to write to the file"}
|
|
},
|
|
"required": ["path", "content"]
|
|
}
|
|
}
|
|
|
|
PATCH_SCHEMA = {
|
|
"name": "patch",
|
|
"description": "Targeted find-and-replace edits in files. Use this instead of sed/awk in terminal. Uses fuzzy matching (9 strategies) so minor whitespace/indentation differences won't break it. Returns a unified diff. Auto-runs syntax checks after editing.\n\nReplace mode (default): find a unique string and replace it.\nPatch mode: apply V4A multi-file patches for bulk changes.",
|
|
"parameters": {
|
|
"type": "object",
|
|
"properties": {
|
|
"mode": {"type": "string", "enum": ["replace", "patch"], "description": "Edit mode: 'replace' for targeted find-and-replace, 'patch' for V4A multi-file patches", "default": "replace"},
|
|
"path": {"type": "string", "description": "File path to edit (required for 'replace' mode)"},
|
|
"old_string": {"type": "string", "description": "Text to find in the file (required for 'replace' mode). Must be unique in the file unless replace_all=true. Include enough surrounding context to ensure uniqueness."},
|
|
"new_string": {"type": "string", "description": "Replacement text (required for 'replace' mode). Can be empty string to delete the matched text."},
|
|
"replace_all": {"type": "boolean", "description": "Replace all occurrences instead of requiring a unique match (default: false)", "default": False},
|
|
"patch": {"type": "string", "description": "V4A format patch content (required for 'patch' mode). Format:\n*** Begin Patch\n*** Update File: path/to/file\n@@ context hint @@\n context line\n-removed line\n+added line\n*** End Patch"}
|
|
},
|
|
"required": ["mode"]
|
|
}
|
|
}
|
|
|
|
SEARCH_FILES_SCHEMA = {
|
|
"name": "search_files",
|
|
"description": "Search file contents or find files by name. Use this instead of grep/rg/find/ls in terminal. Ripgrep-backed, faster than shell equivalents.\n\nContent search (target='content'): Regex search inside files. Output modes: full matches with line numbers, file paths only, or match counts.\n\nFile search (target='files'): Find files by glob pattern (e.g., '*.py', '*config*'). Also use this instead of ls — results sorted by modification time.",
|
|
"parameters": {
|
|
"type": "object",
|
|
"properties": {
|
|
"pattern": {"type": "string", "description": "Regex pattern for content search, or glob pattern (e.g., '*.py') for file search"},
|
|
"target": {"type": "string", "enum": ["content", "files"], "description": "'content' searches inside file contents, 'files' searches for files by name", "default": "content"},
|
|
"path": {"type": "string", "description": "Directory or file to search in (default: current working directory)", "default": "."},
|
|
"file_glob": {"type": "string", "description": "Filter files by pattern in grep mode (e.g., '*.py' to only search Python files)"},
|
|
"limit": {"type": "integer", "description": "Maximum number of results to return (default: 50)", "default": 50},
|
|
"offset": {"type": "integer", "description": "Skip first N results for pagination (default: 0)", "default": 0},
|
|
"output_mode": {"type": "string", "enum": ["content", "files_only", "count"], "description": "Output format for grep mode: 'content' shows matching lines with line numbers, 'files_only' lists file paths, 'count' shows match counts per file", "default": "content"},
|
|
"context": {"type": "integer", "description": "Number of context lines before and after each match (grep mode only)", "default": 0}
|
|
},
|
|
"required": ["pattern"]
|
|
}
|
|
}
|
|
|
|
|
|
def _handle_read_file(args, **kw):
|
|
tid = kw.get("task_id") or "default"
|
|
return read_file_tool(path=args.get("path", ""), offset=args.get("offset", 1), limit=args.get("limit", 500), task_id=tid)
|
|
|
|
|
|
def _handle_write_file(args, **kw):
|
|
tid = kw.get("task_id") or "default"
|
|
return write_file_tool(path=args.get("path", ""), content=args.get("content", ""), task_id=tid)
|
|
|
|
|
|
def _handle_patch(args, **kw):
|
|
tid = kw.get("task_id") or "default"
|
|
return patch_tool(
|
|
mode=args.get("mode", "replace"), path=args.get("path"),
|
|
old_string=args.get("old_string"), new_string=args.get("new_string"),
|
|
replace_all=args.get("replace_all", False), patch=args.get("patch"), task_id=tid)
|
|
|
|
|
|
def _handle_search_files(args, **kw):
|
|
tid = kw.get("task_id") or "default"
|
|
target_map = {"grep": "content", "find": "files"}
|
|
raw_target = args.get("target", "content")
|
|
target = target_map.get(raw_target, raw_target)
|
|
return search_tool(
|
|
pattern=args.get("pattern", ""), target=target, path=args.get("path", "."),
|
|
file_glob=args.get("file_glob"), limit=args.get("limit", 50), offset=args.get("offset", 0),
|
|
output_mode=args.get("output_mode", "content"), context=args.get("context", 0), task_id=tid)
|
|
|
|
|
|
registry.register(name="read_file", toolset="file", schema=READ_FILE_SCHEMA, handler=_handle_read_file, check_fn=_check_file_reqs, emoji="📖")
|
|
registry.register(name="write_file", toolset="file", schema=WRITE_FILE_SCHEMA, handler=_handle_write_file, check_fn=_check_file_reqs, emoji="✍️")
|
|
registry.register(name="patch", toolset="file", schema=PATCH_SCHEMA, handler=_handle_patch, check_fn=_check_file_reqs, emoji="🔧")
|
|
registry.register(name="search_files", toolset="file", schema=SEARCH_FILES_SCHEMA, handler=_handle_search_files, check_fn=_check_file_reqs, emoji="🔎")
|