Change default location for config from XDG statndatd to use the platform-specific folder we use for the db as well

docs/configuration.md

@@ -30,7 +30,10 @@ This creates a `haiku.rag.yaml` file in your current directory with all availabl
 
 1. Path specified via `--config` flag: `haiku-rag --config /path/to/config.yaml <command>`
 2. `./haiku.rag.yaml` (current directory)
-3. `~/.config/haiku.rag/config.yaml` (user config directory)
+3. Platform-specific user directory:
+    - **Linux**: `~/.local/share/haiku.rag/config.yaml`
+    - **macOS**: `~/Library/Application Support/haiku.rag/config.yaml`
+    - **Windows**: `C:/Users/<USER>/AppData/Roaming/haiku.rag/config.yaml`
 
 ## Minimal Configuration
 

src/haiku/rag/config/loader.py

@@ -10,7 +10,7 @@ def find_config_file(cli_path: Path | None = None) -> Path | None:
     Search order:
     1. CLI-provided path (via HAIKU_RAG_CONFIG_PATH env var or parameter)
     2. ./haiku.rag.yaml (current directory)
-    3. ~/.config/haiku.rag/config.yaml (user config)
+    3. Platform-specific user config directory
 
     Returns None if no config file is found.
     """
@@ -29,8 +29,10 @@ def find_config_file(cli_path: Path | None = None) -> Path | None:
     if cwd_config.exists():
         return cwd_config
 
-    user_config_dir = Path.home() / ".config" / "haiku.rag"
-    user_config = user_config_dir / "config.yaml"
+    # Use same directory as data storage for config
+    from haiku.rag.utils import get_default_data_dir
+
+    user_config = get_default_data_dir() / "config.yaml"
     if user_config.exists():
         return user_config
 

tests/test_config_loader.py

@@ -1,5 +1,4 @@
 import os
-from pathlib import Path
 
 import pytest
 
@@ -42,13 +41,17 @@ def test_find_config_file_cwd(tmp_path, monkeypatch):
 def test_find_config_file_user_config(tmp_path, monkeypatch):
     """Test finding config in user config directory."""
     monkeypatch.chdir(tmp_path)
-    user_config_dir = tmp_path / ".config" / "haiku.rag"
-    user_config_dir.mkdir(parents=True)
-    config_file = user_config_dir / "config.yaml"
-    config_file.write_text("environment: production")
 
-    # Mock home directory
-    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+    # Mock get_default_data_dir to return tmp_path
+    def mock_get_default_data_dir():
+        return tmp_path
+
+    monkeypatch.setattr(
+        "haiku.rag.utils.get_default_data_dir", mock_get_default_data_dir
+    )
+
+    config_file = tmp_path / "config.yaml"
+    config_file.write_text("environment: production")
 
     found = find_config_file()
     assert found == config_file
@@ -77,7 +80,14 @@ def test_find_config_file_env_var(tmp_path, monkeypatch):
 def test_find_config_file_not_found(tmp_path, monkeypatch):
     """Test returning None when no config found."""
     monkeypatch.chdir(tmp_path)
-    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+
+    # Mock get_default_data_dir to return tmp_path
+    def mock_get_default_data_dir():
+        return tmp_path
+
+    monkeypatch.setattr(
+        "haiku.rag.utils.get_default_data_dir", mock_get_default_data_dir
+    )
 
     found = find_config_file()
     assert found is None
@@ -152,23 +162,28 @@ def test_load_config_from_env_empty():
 def test_config_precedence_cwd_over_user(tmp_path, monkeypatch):
     """Test that cwd config takes precedence over user config."""
     monkeypatch.chdir(tmp_path)
-    monkeypatch.setattr(Path, "home", lambda: tmp_path)
+
+    # Mock get_default_data_dir to return tmp_path
+    def mock_get_default_data_dir():
+        return tmp_path
+
+    monkeypatch.setattr(
+        "haiku.rag.utils.get_default_data_dir", mock_get_default_data_dir
+    )
 
     # Create both configs
     cwd_config = tmp_path / "haiku.rag.yaml"
     cwd_config.write_text("environment: from-cwd")
 
-    user_config_dir = tmp_path / ".config" / "haiku.rag"
-    user_config_dir.mkdir(parents=True)
-    user_config = user_config_dir / "config.yaml"
+    user_config = tmp_path / "config.yaml"
     user_config.write_text("environment: from-user")
 
     found = find_config_file()
     assert found == cwd_config
     assert found is not None
 
-    config = load_yaml_config(found)
-    assert config["environment"] == "from-cwd"
+    config_data = load_yaml_config(found)
+    assert config_data["environment"] == "from-cwd"
 
 
 def test_config_precedence_env_var_over_cwd(tmp_path, monkeypatch):