# Wide-power autoroute — run on your Mac (Java 23), then hand me the .ses

**File:** `hbox-watchdog-v3-PROD-wideclass.dsn` — the current board's placement + nets + B.Cu GND
plane, **unrouted**, with power net-classes injected so FreeRouting routes the rails wide:

| Class | Width | Nets |
|---|---|---|
| **PWR_HI** | **1.5 mm** | BAT_PLUS, SW_BAT, MAIN5V, VEH5V, SYS5V, VIN_SW |
| **PWR_MID** | **1.0 mm** | SW_5V, 3V3_MODEM, 5V_FAN, 24V, 24V_IN, IGN_IN, SW_FAN, SW3_NODE, FAN_RET |
| kicad_default | 0.2 mm | everything else (signals) |
| GND | — | **handled by the B.Cu plane** (exports as `(plane GND)`, not routed) |

Widths meet the `watchdog-pcb-v3-kicad-guide` §6 spec (power ≥0.5, SW_5V ≥0.8) with margin, and are
**routable** on 2 layers. Power vias reuse the 0.6/0.3 padstack (upsize in the GUI later if you want).

## 1. Route it (in `03-Architecture-Hardware/kicad/`)

**GUI (recommended — you can watch and stop it):**
```bash
cd "~/Documents/Claude/Projects/Drogheda/03-Architecture-Hardware/kicad"
java -jar freerouting-1.9.0.jar
```
File → **Open Design** → `hbox-watchdog-v3-PROD-wideclass.dsn`. It auto-routes; when the ratsnest is
gone (or it stalls), File → **Export Specctra Session File** → save `hbox-watchdog-v3-PROD-wideclass.ses`.

**Headless (one shot):**
```bash
java -jar freerouting-1.9.0.jar \
  -de hbox-watchdog-v3-PROD-wideclass.dsn \
  -do hbox-watchdog-v3-PROD-wideclass.ses -mp 100
```

## 2. Bring it back
Tell me `hbox-watchdog-v3-PROD-wideclass.ses` is ready and **I'll import it** (import_ses → refill the
GND plane → DRC → render) — same finishing I did on the 0.2 mm route. Or in KiCad: File → **Import →
Specctra Session**.

> ⚠ Importing **replaces** the current 0.2 mm routing with the new wide route (backups exist:
> `…bak-postAutoroute-20260703-202442`). It's a **fresh full route**, so expect a similar small
> straggler set (a few sensor/GND opens) to close interactively — same as before.

## 3. Tweak widths (optional)
Edit the µm values in the `.dsn`: `(width 1500)` = PWR_HI, `(width 1000)` = PWR_MID. Your project's
original spec was PWR_HI **2.5 mm** — set `(width 2500)` if you want it, but wider rails may leave
more nets unrouted on 2 layers (iterate down if so).