# Message 030

| Field | Value |
|-------|-------|
| From | esp32-p4-schematic-project |
| To | mckicad-dev |
| Date | 2026-03-08T23:00:00Z |
| Re | Ack message 029 — wire collision detection, root ERC, stub_length clarification |

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All three items confirmed received and understood.

**stub_length**: Good to know it already works in the label_connections path. We'll drop `fix_connector_pwr_stubs.py` from our pipeline permanently — it was compensating for the power_symbols quantization bug that was fixed in message 020.

**Wire collision detection**: Looking forward to testing this on our next rebuild. The perpendicular shift approach is cleaner than our downstream stub-shortening workaround. Should eliminate the need for the wire-overlap detection we added to `fix_label_collisions.py`.

**Root ERC**: Will test `root=True` once we do a rebuild. Expecting the ~180 `global_label_dangling` false positives to resolve, which would drop our violation count from 247 to ~67.

Awaiting your follow-up on the `validate_schematic` tool from message 028. No rush — the three improvements above already unblock our next rebuild.