CH1 · copper top CH2 · copper bottom triggered · rp2040-minimal.fragua 36 fps · 2-layer

Fragua board view: routed RP2040 minimal PCB with copper traces, QFN-56 MCU, USB-C, headers and passives

The agent lays the copper. You watch the board.

Fragua is AI-native PCB design. A coding agent drives schematic, placement, routing and DRC through a local script API — you supervise on a live canvas and ship a fab-ready zip. No KiCad. No FreeRouting. Pure Rust.

View on GitHub Install

install curl -fsSL https://raw.githubusercontent.com/mentasystems/fragua/master/scripts/install.sh | sh

Project

RP2040 minimal

Raspberry Pi Pico–class open hardware, designed end-to-end in Fragua.

Bill of materials

RP2040 QFN-56 W25Q16 flash 12 MHz crystal USB-C LDO BOOTSEL / RESET 2× 1×10 GPIO

Stack

Rust Tauri 2 API :7878

Fab output

pack fab=jlcpcb → Gerbers, drill, BOM, CPL

Same project. Board and schematic.

Real captures from the live Fragua session on the RP2040 experiment — routed copper on the board, net wires on the schematic. Not a mockup.

RP2040 minimal board with dense copper routing in Fragua

RP2040 minimal schematic with net wires in Fragua

Agent loop, human never blocked.

From a prompt or a script file to a zip you can upload to JLCPCB — every step is a tool the agent calls, streamed to the canvas as it runs.

Schematic

Symbols, nets, ERC. Decoupling and pull-ups appear as the agent commits the circuit.

Place

Electrostatic global place + SA legalisation. Edge-mount connectors face the outline on purpose.

Route

Theta* any-angle or topological engine, vias where topology needs them, organic post-pass fillets.

Pack

DRC, manufacturing rules, Gerber + Excellon + BOM + CPL in one fab zip. No external CAD.

The script API is the product surface.

Your coding agent posts plain multi-line scripts. Replies are text. The desktop window is the observation deck on the same in-memory project.

POST /script · 127.0.0.1:7878

# load the RP2040 stress project, then drive it
$ fragua run stress/rp2040-minimal.fragua

$ curl -s http://127.0.0.1:7878/script \
    -H 'content-type: application/json' \
    -d '{"script":"status\nview board\nroute max_seconds=90\ndrc\npack fab=jlcpcb"}'

[L1 ok project.status] project : 36 footprint(s)
[L2 ok view] board
[L3 ok route]  routed · budget 90s · hints on congested nets
[L4 ok drc]     clearance clean under fab-rules
[L5 ok pack]    wrote fab-jlcpcb.zip

Non-negotiables.

What Fragua will not trade away — the same rules the agent is held to.

No external CAD

No kicad-cli, no FreeRouting JAR, no pcbnew.so. Every format we read or write is our own Rust.

Agent-first

The HTTP script surface is primary. The UI exists so a human can watch, drag a part, and feed feedback back.

Human never blocked

Long routes and DRC stream progress. Pause, redirect, cancel — the agent does not own the keyboard.

Fab-honest

Adopt JLCPCB / PCBWay rules before pack. Clearance under the fab limit is reported, not hidden.

Open the project. Drive the copper.

macOS arm64/x64 and Linux x64. Windows builds on the releases page. MIT license.

GitHub · mentasystems/fragua Copy install