Hermes-agent

agent/runtime_cwd.py

@@ -0,0 +1,62 @@
+"""Single source of truth for the agent working directory.
+
+`TERMINAL_CWD` is the runtime carrier for the configured working directory
+(design #19214/#19242: `terminal.cwd` is bridged once to `TERMINAL_CWD` at
+gateway/cron startup). The local-CLI backend deliberately leaves it unset and
+relies on the launch dir. Reading it in one place keeps the system prompt, the
+tool surfaces, and context-file discovery agreeing on where the agent lives.
+
+Multi-session gateways can pin a logical cwd via the `_SESSION_CWD`
+contextvar; CLI/cron fall through to `TERMINAL_CWD`/launch cwd.
+"""
+
+import os
+from contextvars import ContextVar, Token
+from pathlib import Path
+from typing import Any
+
+_UNSET: Any = object()
+
+_SESSION_CWD: ContextVar = ContextVar("HERMES_SESSION_CWD", default=_UNSET)
+
+
+def set_session_cwd(cwd: str | None) -> Token:
+    """Pin the logical cwd for the current context."""
+    return _SESSION_CWD.set((cwd or "").strip())
+
+
+def clear_session_cwd() -> None:
+    _SESSION_CWD.set("")
+
+
+def _session_cwd_override() -> str:
+    value = _SESSION_CWD.get()
+    if value is _UNSET:
+        return ""
+    return str(value).strip()
+
+
+def resolve_agent_cwd() -> Path:
+    override = _session_cwd_override()
+    if override:
+        p = Path(override).expanduser()
+        if p.is_dir():
+            return p
+    raw = os.environ.get("TERMINAL_CWD", "").strip()
+    if raw:
+        p = Path(raw).expanduser()
+        if p.is_dir():
+            return p
+    return Path(os.getcwd())
+
+
+def resolve_context_cwd() -> Path | None:
+    # None means "no configured cwd": build_context_files_prompt then falls back
+    # to the launch dir (os.getcwd()) — correct for the local CLI. The gateway
+    # avoids slurping its install dir by setting TERMINAL_CWD (see system_prompt.py)
+    # or, per session, the _SESSION_CWD contextvar above.
+    override = _session_cwd_override()
+    if override:
+        return Path(override).expanduser()
+    raw = os.environ.get("TERMINAL_CWD", "").strip()
+    return Path(raw).expanduser() if raw else None