#Goal

- Delete all existing PCB traces/routing geometry for the BoomPack Dual ESP32 Audio Pod while preserving schematic connectivity, component placements, board dimensions (75x75mm), and a 4-layer stackup and then reroute the board from scratch.

#Implementation plan

1. Inspect existing PCB layout

1. Identify and locate all stale routing objects including traces, vias, smart-vias, copper fills, floating copper, and dangling traces.

2. Confirm that schematic connectivity, component placement, board outline, and stackup are intact.

2. Remove stale routing objects

1. Batch delete all traces, vias, and copper elements that are flagged as stale or inactive.

2. Ensure that only essential elements (component pads, board outline, schematic nets) are retained.

3. Verify cleanup

1. Run a DRC inspection to confirm removal of all dangling traces, floating copper, and redundant routing objects.

2. Confirm that airwires remain as expected because the board is unrouted post-deletion.

4. Reconfigure and plan routing

1. Set up routing widths and parameters for differing signal types, including power/GND, UART/I2S, and control signals.

2. Use phase-based autorouting: route power and ground first, then critical signal pairs (UART/I2S), followed by remaining controls and headers.

5. Final verification

1. Re-run DRC to ensure there are no overlapping copper areas, stray airwires, or remaining stale objects.

2. Iterate cleanup actions until the board meets manufacturing criteria.

#Success criteria

- All stale routing objects are completely removed and the board is free from dangling traces and floating copper as verified by DRC.

- The board remains at 75x75mm with a 4-layer stackup and maintained component placements and schematic connectivity.

- All nets are outcome-routed based on defined routing priorities with a clear and manufacturable layout.