feat: Add comprehensive documentation to all modules

README.md

@@ -341,6 +341,47 @@ See **SETUP_CREDENTIALS.md** for API credential issues.
 
 ---
 
+## Developer Guide
+
+This section provides instructions for setting up a development environment, running tests, and understanding the project's internal structure.
+
+### Development Environment Setup
+
+1.  **Clone the repository:**
+    ```bash
+    git clone https://github.com/your-repo/K1_Lightwave.git
+    cd K1_Lightwave
+    ```
+
+2.  **Create a virtual environment:**
+    ```bash
+    python3 -m venv .venv
+    source .venv/bin/activate
+    ```
+
+3.  **Install dependencies:**
+    ```bash
+    pip install -r requirements.txt
+    ```
+
+### Running Tests
+
+To run the test suite, use the following command:
+```bash
+python3 -m unittest discover -s tests
+```
+
+### Project Structure Overview
+
+-   `elite_pcb_designer.py`: The main entry point and orchestrator for the PCB design process.
+-   `design_preparation.py`: Handles the initial loading and preparation of the design files.
+-   `component_placement.py`: Manages the intelligent placement of components.
+-   `automated_routing.py`: Orchestrates the automated routing process.
+-   `design_validation.py`: Performs final validation and generates manufacturing files.
+-   `tests/`: Contains the unit tests for the project.
+
+---
+
 ## License & Credits
 
 K1 Lightwave design pipeline. Built with KiCad, Python, Claude AI, and open-source EDA tools.

agent/dfm/checker.py

@@ -19,12 +19,23 @@ class DFMCheck:
     """Single DFM check result."""
 
     def __init__(self, rule: str, message: str, status: str = "PASS", severity: str = "INFO"):
+        """Initializes a new DFM check.
+        Args:
+            rule (str): The name of the rule being checked.
+            message (str): A description of the check.
+            status (str): The status of the check (PASS or FAIL).
+            severity (str): The severity of the check (INFO, WARNING, or ERROR).
+        """
         self.rule = rule
         self.message = message
         self.status = status  # PASS or FAIL
         self.severity = severity  # INFO, WARNING, ERROR
 
     def to_dict(self) -> Dict[str, Any]:
+        """Converts the DFM check to a dictionary.
+        Returns:
+            Dict[str, Any]: A dictionary representation of the DFM check.
+        """
         return {
             "rule": self.rule,
             "message": self.message,

agent/drivers/kicad_cli.py

@@ -20,7 +20,6 @@
 
 class KiCadCLIError(Exception):
     """Raised when a kicad-cli command fails."""
-    pass
 
 
 def _run_cmd(args, description=""):

agent/orchestrator/run.py

@@ -35,26 +35,32 @@
 
 class OrchestratorError(Exception):
     """Raised when orchestrator encounters a fatal error."""
-    pass
 
 
 class Phase:
     """Context manager for tracking phase execution."""
 
     def __init__(self, phase_num, description):
+        """Initializes a new phase.
+        Args:
+            phase_num (int): The number of the phase.
+            description (str): A description of the phase.
+        """
         self.phase_num = phase_num
         self.description = description
         self.start_time = None
         self.end_time = None
 
     def __enter__(self):
+        """Starts the phase and prints a header."""
         self.start_time = datetime.now()
         print(f"\n{'=' * 70}")
         print(f"PHASE {self.phase_num}: {self.description}")
         print(f"{'=' * 70}")
         return self
 
     def __exit__(self, exc_type, exc_val, exc_tb):
+        """Ends the phase and prints a summary."""
         self.end_time = datetime.now()
         elapsed = (self.end_time - self.start_time).total_seconds()
         if exc_type is None:

agent/routing/freerouting.py

@@ -19,7 +19,6 @@
 
 class FreeRoutingError(Exception):
     """Raised when FreeRouting operation fails."""
-    pass
 
 
 def route(jar_path, dsn_file, ses_output, timeout_s=1800, max_retries=1):