fix: Address plan review feedback - imports and test coverage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/superpowers/plans/2026-03-18-config-file-support.md

@@ -28,6 +28,13 @@
 - Create: `src/zzpyjenkins/config.py`
 - Create: `tests/test_config.py`
 
+- [ ] **Step 0: Create tests directory**
+
+```bash
+mkdir -p tests
+touch tests/__init__.py
+```
+
 - [ ] **Step 1: Write the failing test for load_config with missing file**
 
 ```python
@@ -98,6 +105,27 @@ def load_config(config_path: Path) -> dict:
 Run: `uv run pytest tests/test_config.py -v`
 Expected: PASS
 
+- [ ] **Step 4.5: Add test for invalid TOML syntax**
+
+```python
+# Add to tests/test_config.py
+import tempfile
+
+
+def test_load_config_invalid_toml():
+    """Test load_config raises error for invalid TOML syntax."""
+    with tempfile.NamedTemporaryFile(mode="w", suffix=".toml", delete=False) as f:
+        f.write("invalid toml [[[[")
+        temp_path = Path(f.name)
+
+    try:
+        with pytest.raises(ConfigError) as exc_info:
+            load_config(temp_path)
+        assert "Invalid TOML syntax" in str(exc_info.value)
+    finally:
+        temp_path.unlink()
+```
+
 - [ ] **Step 5: Commit**
 
 ```bash
@@ -117,6 +145,9 @@ git commit -m "feat: add config module with load_config function"
 
 ```python
 # Add to tests/test_config.py
+# Update import to include get_server_config:
+from zzpyjenkins.config import load_config, ConfigError, get_server_config
+
 
 def test_get_server_config_success():
     """Test getting a valid server config."""
@@ -231,6 +262,14 @@ git commit -m "feat: add get_server_config function with validation"
 
 ```python
 # Add to tests/test_config.py
+# Update import to include get_default_config_path:
+from zzpyjenkins.config import (
+    load_config,
+    ConfigError,
+    get_server_config,
+    get_default_config_path,
+)
+
 
 def test_get_default_config_path():
     """Test default config path is correct."""
@@ -374,9 +413,7 @@ git commit -m "feat: replace credential options with --server config option"
 
 ```python
 # Add to tests/test_config.py
-
+# tempfile is already imported in Task 1
-import tempfile
-
 
 def test_full_config_flow():
     """Test complete config loading flow with temp file."""