Step 7: Placement

place the parts for routability, current and heat; the binary packs, checks courtyards and lands moves; reserve visible space for connector labels and the two-sided service silkscreen; the switch-node check refuses switch copper under another part or a switch loop longer than the spec allows, and sends the AI back here

Visits

• 2026-11-09T01:22:18Z
• 2026-11-09T02:48:09Z (a return: router could not escape the STM32: matrix pins faced the board edge and decoupling caps boxed the chip in on all sides; turning U1 180 deg and moving caps to their supply pins)
• 2026-11-09T03:20:47Z (a return: Freerouting left U1 pins 11 (COL1) and 39 (COL12) unrouted: C8/C9 blocked the right-side escape of pins 10-12; caps moved to open it)
• 2026-11-09T03:33:51Z
• 2026-11-09T04:01:34Z (a return: Fields: decoupling caps C3/C5 3.5-5 mm from their STM32 supply pins; power traces came out 0.2 mm because widths were only in the AI Flow spec, not KiCad netclasses)
• 2026-11-09T06:33:51Z (a return: re-record proofs after the rules revisit; board and spec unchanged)
• 2026-11-09T08:10:42Z (a return: Aesthetic redesign requested: symmetric controller area around the centred USB-C (ESD below the connector, STM32 right, power block left))
• 2026-11-10T04:13:03Z
• 2026-11-10T04:14:50Z (a return: re-verify the placements with the rev B board open in KiCad (the first check ran with no editor open))

What the binary checked

place-land

• accepted: 171
• boardSha256: d8c06d62d879243a3e4a8d65b621fe3f7b6209a8eee92f3ffbe6b68821d91078
• mode: verified-existing
• ok: True
• parts: 171
• pass: True
• report: aiflow-run/placement-verify.json
• revision: 84adc23e66d31a7470ae46668ee58e4265bb4ae40f7eae01385e89df81018455
• specSha256: 3c6cb429db62bd6c2fb859767941a8381c9201ec43902deea5218deca62224bd

Screenshots and drawings

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Clips