fix(acp): normalize Windows cwd for WSL tool execution

tests/acp/test_session.py

@@ -8,6 +8,7 @@ from types import SimpleNamespace
 import pytest
 from unittest.mock import MagicMock, patch
 
+from acp_adapter import session as acp_session
 from acp_adapter.session import SessionManager, SessionState
 from hermes_state import SessionDB
 
@@ -42,6 +43,27 @@ class TestCreateSession:
         state = manager.create_session(cwd="/tmp/work")
         assert calls == [(state.session_id, "/tmp/work")]
 
+
+    def test_register_task_cwd_translates_windows_drive_for_wsl_tools(self, monkeypatch):
+        captured = {}
+
+        def fake_register_task_env_overrides(task_id, overrides):
+            captured["task_id"] = task_id
+            captured["overrides"] = overrides
+
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+        monkeypatch.setattr(
+            "tools.terminal_tool.register_task_env_overrides",
+            fake_register_task_env_overrides,
+        )
+
+        acp_session._register_task_cwd("session-1", r"E:\Projects\AI\paperclip")
+
+        assert captured == {
+            "task_id": "session-1",
+            "overrides": {"cwd": "/mnt/e/Projects/AI/paperclip"},
+        }
+
     def test_session_ids_are_unique(self, manager):
         s1 = manager.create_session()
         s2 = manager.create_session()
@@ -56,6 +78,59 @@ class TestCreateSession:
         assert manager.get_session("does-not-exist") is None
 
 
+
+
+# ---------------------------------------------------------------------------
+# WSL cwd translation
+# ---------------------------------------------------------------------------
+
+
+class TestWslCwdTranslation:
+    def test_translate_acp_cwd_converts_windows_drive_path_when_wsl(self, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+
+        assert acp_session._translate_acp_cwd(r"E:\Projects\AI\paperclip") == "/mnt/e/Projects/AI/paperclip"
+
+    def test_translate_acp_cwd_handles_forward_slashes_when_wsl(self, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+
+        assert acp_session._translate_acp_cwd("D:/work/project") == "/mnt/d/work/project"
+
+    def test_translate_acp_cwd_leaves_windows_drive_path_unchanged_off_wsl(self, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", False)
+
+        assert acp_session._translate_acp_cwd(r"E:\Projects\AI\paperclip") == r"E:\Projects\AI\paperclip"
+
+    def test_translate_acp_cwd_leaves_posix_path_unchanged_on_wsl(self, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+
+        assert acp_session._translate_acp_cwd("/mnt/e/Projects/AI/paperclip") == "/mnt/e/Projects/AI/paperclip"
+
+    def test_create_session_stores_translated_cwd_on_wsl(self, manager, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+
+        state = manager.create_session(cwd=r"E:\Projects\AI\paperclip")
+
+        assert state.cwd == "/mnt/e/Projects/AI/paperclip"
+
+    def test_fork_session_stores_translated_cwd_on_wsl(self, manager, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+        original = manager.create_session(cwd="/tmp/base")
+
+        forked = manager.fork_session(original.session_id, cwd=r"D:\work\project")
+
+        assert forked is not None
+        assert forked.cwd == "/mnt/d/work/project"
+
+    def test_update_cwd_stores_translated_cwd_on_wsl(self, manager, monkeypatch):
+        monkeypatch.setattr("hermes_constants._wsl_detected", True)
+        state = manager.create_session(cwd="/tmp/old")
+
+        updated = manager.update_cwd(state.session_id, cwd=r"C:\Users\foo\project")
+
+        assert updated is not None
+        assert updated.cwd == "/mnt/c/Users/foo/project"
+
 # ---------------------------------------------------------------------------
 # fork
 # ---------------------------------------------------------------------------