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hermes-agent/hermes_constants.py
Alexander Whitestone b211122291
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fix: Expand tilde in get_hermes_home() when HERMES_HOME=~/...
Closes #478. Uses Path.expanduser() to expand ~ to user's home directory.
2026-04-14 01:36:07 +00:00

116 lines
3.8 KiB
Python

"""Shared constants for Hermes Agent.
Import-safe module with no dependencies — can be imported from anywhere
without risk of circular imports.
"""
import os
from pathlib import Path
def get_hermes_home() -> Path:
"""Return the Hermes home directory (default: ~/.hermes).
Reads HERMES_HOME env var, falls back to ~/.hermes.
Expands ~ to user's home directory if present.
This is the single source of truth — all other copies should import this.
"""
hermes_home = os.getenv("HERMES_HOME")
if hermes_home:
# Expand ~ to user's home directory
return Path(hermes_home).expanduser()
return Path.home() / ".hermes"
def get_optional_skills_dir(default: Path | None = None) -> Path:
"""Return the optional-skills directory, honoring package-manager wrappers.
Packaged installs may ship ``optional-skills`` outside the Python package
tree and expose it via ``HERMES_OPTIONAL_SKILLS``.
"""
override = os.getenv("HERMES_OPTIONAL_SKILLS", "").strip()
if override:
return Path(override)
if default is not None:
return default
return get_hermes_home() / "optional-skills"
def get_hermes_dir(new_subpath: str, old_name: str) -> Path:
"""Resolve a Hermes subdirectory with backward compatibility.
New installs get the consolidated layout (e.g. ``cache/images``).
Existing installs that already have the old path (e.g. ``image_cache``)
keep using it — no migration required.
Args:
new_subpath: Preferred path relative to HERMES_HOME (e.g. ``"cache/images"``).
old_name: Legacy path relative to HERMES_HOME (e.g. ``"image_cache"``).
Returns:
Absolute ``Path`` — old location if it exists on disk, otherwise the new one.
"""
home = get_hermes_home()
old_path = home / old_name
if old_path.exists():
return old_path
return home / new_subpath
def display_hermes_home() -> str:
"""Return a user-friendly display string for the current HERMES_HOME.
Uses ``~/`` shorthand for readability::
default: ``~/.hermes``
profile: ``~/.hermes/profiles/coder``
custom: ``/opt/hermes-custom``
Use this in **user-facing** print/log messages instead of hardcoding
``~/.hermes``. For code that needs a real ``Path``, use
:func:`get_hermes_home` instead.
"""
home = get_hermes_home()
try:
return "~/" + str(home.relative_to(Path.home()))
except ValueError:
return str(home)
VALID_REASONING_EFFORTS = ("xhigh", "high", "medium", "low", "minimal")
def parse_reasoning_effort(effort: str) -> dict | None:
"""Parse a reasoning effort level into a config dict.
Valid levels: "xhigh", "high", "medium", "low", "minimal", "none".
Returns None when the input is empty or unrecognized (caller uses default).
Returns {"enabled": False} for "none".
Returns {"enabled": True, "effort": <level>} for valid effort levels.
"""
if not effort or not effort.strip():
return None
effort = effort.strip().lower()
if effort == "none":
return {"enabled": False}
if effort in VALID_REASONING_EFFORTS:
return {"enabled": True, "effort": effort}
return None
OPENROUTER_BASE_URL = "https://openrouter.ai/api/v1"
OPENROUTER_MODELS_URL = f"{OPENROUTER_BASE_URL}/models"
OPENROUTER_CHAT_URL = f"{OPENROUTER_BASE_URL}/chat/completions"
AI_GATEWAY_BASE_URL = "https://ai-gateway.vercel.sh/v1"
AI_GATEWAY_MODELS_URL = f"{AI_GATEWAY_BASE_URL}/models"
AI_GATEWAY_CHAT_URL = f"{AI_GATEWAY_BASE_URL}/chat/completions"
NOUS_API_BASE_URL = "https://inference-api.nousresearch.com/v1"
NOUS_API_CHAT_URL = f"{NOUS_API_BASE_URL}/chat/completions"
# Guardrails
HERMES_MAX_TOKENS_PER_SESSION = int(os.getenv("HERMES_MAX_TOKENS", "50000"))
HERMES_MAX_TOOL_CALLS_PER_TURN = int(os.getenv("HERMES_MAX_TOOL_CALLS", "10"))