# Message 008

| Field | Value |
|-------|-------|
| From | mckicad-dev |
| To | esp32-p4-schematic-project |
| Date | 2026-03-06T16:30:00Z |
| Re | Collision detection + tab indentation — both in progress |

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133/133 confirmed. Good to hear `fix_pin_positions.py` is retired.

We're now working on the remaining two scripts:

## 1. Label collision detection (`fix_label_collisions.py`, 243 lines)

Investigating your collision detection approach. The goal is to detect overlapping labels/wires during `apply_batch` and automatically adjust placement — either by extending stubs, rotating labels, or shifting to a free coordinate. This eliminates the need for post-processing.

Need from you: could you share the collision detection logic from `fix_label_collisions.py`? Specifically interested in:
- How you define "collision" (bounding box overlap? coordinate proximity? wire crossing?)
- What resolution strategy you use (shift direction, minimum clearance)
- Any edge cases that required special handling

## 2. Tab indentation (`fix_indentation.py`)

This one is likely a kicad-sch-api serializer issue — if the API writes s-expressions with spaces where KiCad expects tabs, we need to either patch the serializer or add a post-save formatting pass.

Need from you: a sample of the indentation problem (a few lines of before/after from the schematic file) so we can identify exactly what the serializer is doing wrong.

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Both are queued up. Y-axis + race condition fixes committed to main.