diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 0000000..aa0afdc
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,206 @@
+# Copilot Instructions for Meshtastic Python
+
+## Project Overview
+
+This is the Meshtastic Python library and CLI - a Python API for interacting with Meshtastic mesh radio devices. It supports communication via Serial, TCP, and BLE interfaces.
+
+## Technology Stack
+
+- **Language**: Python 3.9 - 3.14
+- **Package Manager**: Poetry
+- **Testing**: pytest with hypothesis for property-based testing
+- **Linting**: pylint
+- **Type Checking**: mypy (working toward strict mode)
+- **Documentation**: pdoc3
+- **License**: GPL-3.0
+
+## Project Structure
+
+```
+meshtastic/           # Main library package
+├── __init__.py       # Core interface classes and pub/sub topics
+├── __main__.py       # CLI entry point
+├── mesh_interface.py # Base interface class for all connection types
+├── serial_interface.py
+├── tcp_interface.py
+├── ble_interface.py
+├── node.py           # Node representation and configuration
+├── protobuf/         # Generated Protocol Buffer files (*_pb2.py, *_pb2.pyi)
+├── tests/            # Unit and integration tests
+├── powermon/         # Power monitoring tools
+└── analysis/         # Data analysis tools
+examples/             # Usage examples
+protobufs/            # Protocol Buffer source definitions
+```
+
+## Coding Standards
+
+### Style Guidelines
+
+- Follow PEP 8 style conventions
+- Use type hints for function parameters and return values
+- Document public functions and classes with docstrings
+- Prefer explicit imports over wildcard imports
+- Use `logging` module instead of print statements for debug output
+
+### Type Annotations
+
+- Add type hints to all new code
+- Use `Optional[T]` for nullable types
+- Use `Dict`, `List`, `Tuple` from `typing` module for Python 3.9 compatibility
+- Protobuf types are in `meshtastic.protobuf.*_pb2` modules
+
+### Naming Conventions
+
+- Classes: `PascalCase` (e.g., `MeshInterface`, `SerialInterface`)
+- Functions/methods: `camelCase` for public API (e.g., `sendText`, `sendData`)
+- Internal functions: `snake_case` with leading underscore (e.g., `_send_packet`)
+- Constants: `UPPER_SNAKE_CASE` (e.g., `BROADCAST_ADDR`, `LOCAL_ADDR`)
+
+### Error Handling
+
+- Use custom exception classes when appropriate (e.g., `MeshInterface.MeshInterfaceError`)
+- Provide meaningful error messages
+- Use `our_exit()` from `meshtastic.util` for CLI exits with error codes
+
+## Testing
+
+### Test Organization
+
+Tests are in `meshtastic/tests/` and use pytest markers:
+
+- `@pytest.mark.unit` - Fast unit tests (default)
+- `@pytest.mark.unitslow` - Slower unit tests
+- `@pytest.mark.int` - Integration tests
+- `@pytest.mark.smoke1` - Single device smoke tests
+- `@pytest.mark.smoke2` - Two device smoke tests
+- `@pytest.mark.smokevirt` - Virtual device smoke tests
+- `@pytest.mark.examples` - Example validation tests
+
+### Running Tests
+
+```bash
+# Run unit tests only (default)
+make test
+# or
+pytest -m unit
+
+# Run all tests
+pytest
+
+# Run with coverage
+make cov
+```
+
+### Writing Tests
+
+- Use `pytest` fixtures from `conftest.py`
+- Use `hypothesis` for property-based testing where appropriate
+- Mock external dependencies (serial ports, network connections)
+- Test file naming: `test_<module_name>.py`
+
+## Pub/Sub Events
+
+The library uses pypubsub for event handling. Key topics:
+
+- `meshtastic.connection.established` - Connection successful
+- `meshtastic.connection.lost` - Connection lost
+- `meshtastic.receive.text(packet)` - Text message received
+- `meshtastic.receive.position(packet)` - Position update received
+- `meshtastic.receive.data.portnum(packet)` - Data packet by port number
+- `meshtastic.node.updated(node)` - Node database changed
+- `meshtastic.log.line(line)` - Raw log line from device
+
+## Protocol Buffers
+
+- Protobuf definitions are in `protobufs/meshtastic/`
+- Generated Python files are in `meshtastic/protobuf/`
+- Never edit `*_pb2.py` or `*_pb2.pyi` files directly
+- Regenerate with: `make protobufs` or `./bin/regen-protobufs.sh`
+
+## Common Patterns
+
+### Creating an Interface
+
+```python
+import meshtastic.serial_interface
+
+# Auto-detect device
+iface = meshtastic.serial_interface.SerialInterface()
+
+# Specific device
+iface = meshtastic.serial_interface.SerialInterface(devPath="/dev/ttyUSB0")
+
+# Always close when done
+iface.close()
+
+# Or use context manager
+with meshtastic.serial_interface.SerialInterface() as iface:
+    iface.sendText("Hello mesh")
+```
+
+### Sending Messages
+
+```python
+# Text message (broadcast)
+iface.sendText("Hello")
+
+# Text message to specific node
+iface.sendText("Hello", destinationId="!abcd1234")
+
+# Binary data
+iface.sendData(data, portNum=portnums_pb2.PRIVATE_APP)
+```
+
+### Subscribing to Events
+
+```python
+from pubsub import pub
+
+def on_receive(packet, interface):
+    print(f"Received: {packet}")
+
+pub.subscribe(on_receive, "meshtastic.receive")
+```
+
+## Development Workflow
+
+1. Install dependencies: `poetry install --all-extras --with dev`
+2. Make changes
+3. Run linting: `poetry run pylint meshtastic examples/`
+4. Run type checking: `poetry run mypy meshtastic/`
+5. Run tests: `poetry run pytest -m unit`
+6. Update documentation if needed
+
+## CLI Development
+
+The CLI is in `meshtastic/__main__.py`. When adding new CLI commands:
+
+- Use argparse for argument parsing
+- Support `--dest` for specifying target node
+- Provide `--help` documentation
+- Handle errors gracefully with meaningful messages
+
+## Dependencies
+
+### Required
+- `pyserial` - Serial port communication
+- `protobuf` - Protocol Buffers
+- `pypubsub` - Pub/sub messaging
+- `bleak` - BLE communication
+- `tabulate` - Table formatting
+- `pyyaml` - YAML config support
+- `requests` - HTTP requests
+
+### Optional (extras)
+- `cli` extra: `pyqrcode`, `print-color`, `dotmap`, `argcomplete`
+- `tunnel` extra: `pytap2`
+- `analysis` extra: `dash`, `pandas`
+
+## Important Notes
+
+- Always test with actual Meshtastic hardware when possible
+- Be mindful of radio regulations in your region
+- The nodedb (`interface.nodes`) is read-only
+- Packet IDs are random 32-bit integers
+- Default timeout is 300 seconds for operations
diff --git a/.github/workflows/update_protobufs.yml b/.github/workflows/update_protobufs.yml
index c7b9375..b9c7558 100644
--- a/.github/workflows/update_protobufs.yml
+++ b/.github/workflows/update_protobufs.yml
@@ -1,6 +1,9 @@
 name: "Update protobufs"
 on: workflow_dispatch
 
+permissions:
+  contents: write
+
 jobs:
   update-protobufs:
     runs-on: ubuntu-latest
@@ -9,23 +12,34 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
+          fetch-depth: 0
           submodules: true
 
-      - name: Update Submodule
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install Poetry
         run: |
-          git pull --recurse-submodules
+          python -m pip install --upgrade pip
+          python -m pip install poetry
+
+      - name: Update protobuf submodule
+        run: |
+          git submodule sync --recursive
+          git submodule update --init --recursive
           git submodule update --remote --recursive
 
       - name: Download nanopb
         run: |
-          wget https://jpa.kapsi.fi/nanopb/download/nanopb-0.4.8-linux-x86.tar.gz
+          curl -L -o nanopb-0.4.8-linux-x86.tar.gz https://jpa.kapsi.fi/nanopb/download/nanopb-0.4.8-linux-x86.tar.gz
           tar xvzf nanopb-0.4.8-linux-x86.tar.gz
           mv nanopb-0.4.8-linux-x86 nanopb-0.4.8
 
-      - name: Install poetry (needed by regen-protobufs.sh)
+      - name: Install Python dependencies
         run: |
-          python -m pip install --upgrade pip
-          pip3 install poetry
+          poetry install --with dev
 
       - name: Re-generate protocol buffers
         run: |
@@ -38,4 +52,9 @@ jobs:
           git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}
           git add protobufs
           git add meshtastic/protobuf
-          git commit -m "Update protobuf submodule" && git push || echo "No changes to commit"
+          if [[ -n "$(git status --porcelain)" ]]; then
+            git commit -m "Update protobufs"
+            git push
+          else
+            echo "No changes to commit"
+          fi