Your AI Agent Can Outgrow Its Editor: Hardware Design Workflows Beyond EDA and CAD Features
An EDA or CAD editor gives you features: a router, a length tuner, a simulator, a rule check, a stress analysis. Each feature does one job. In Flux, the AI agent uses all of them in one project, for the board and the mechanical design, and combines them into a complete engineering workflow. You ask for the result. The agent routes, tunes, simulates, checks, and changes the design until the result meets your target.
That is work that no single editor feature does. Your agent has outgrown its editor.
Every editor feature stops at its own edge
Think about what a real engineering question needs. "Will this DDR interface meet timing?" is not a routing question, a length-tuning question, or a simulation question. It is all three, in order, with a decision after each step.
A length tuner does not know the timing budget. A simulator does not know which trace to change when the eye closes. A rule check does not know that the enclosure moved a connector. A stress analysis does not know that the bracket also has to clear a cable and a heatsink.
In a desktop tool, the engineer is the glue between these features. Export the board. Set up the solver. Read the plot. Go back to the layout. Change the route. Run it all again. Then do the same for the mechanical design in a second tool. A question like this takes days, and many teams skip it and let the first prototype be the test.
In Flux, the agent is the glue
Flux is AI first. The agent reads your requirement and your project: the schematic, the routed copper, the stackup, the datasheets, the parts and assemblies. It picks the steps that the question needs and runs them in order. After each step it reads the result and decides the next one. When a result misses the target, it changes the design and runs the check again.
So the list of what Flux can do is not the list of buttons in the editor. If the agent can get there by combining routing, length tuning, simulation, and checks, Flux does it. A new workflow does not wait for a new feature release. You describe it in the chat, and the agent runs it today.
This is also why agents need direct access to the design and simulation tools, not a remote control for a desktop app. Read why driving KiCad or Fusion through MCP is like sucking a pizza through a straw.
Six workflows that no single feature provides
Here is what that looks like on professional devices. Each workflow is one request in the chat. Each one combines several Flux capabilities that a desktop editor keeps in separate menus, or in separate tools.
1. High-speed interfaces: from a timing budget to a simulated eye
An engineer designs a compute module with an SoC, a DDR memory, and a PCIe link to a camera bridge. She asks: "Route the DDR byte lanes and the PCIe lanes so that they meet timing, and show me the proof."
The agent reads the memory and SoC datasheets and turns their timing into length and skew targets for this stackup. It routes DQ0 to DQ7 as a length-matched bus to the strobe, tunes each lane with trombone meanders to the target within the tolerance, and reports every lane length and the bus skew. It routes the PCIe lanes as 85 Ω differential pairs from the stackup and keeps each pair's skew below the limit. Then it runs a full-wave simulation of the routed copper: SDD11, SDD21, differential impedance, and an eye diagram at the link rate. When you upload the Touchstone file of the connector vendor, the agent compares it with the routed pair.
Routing, length tuning, a timing budget, and signal-integrity simulation: four features in a desktop tool, one request in Flux.
2. EMC review of a routed board
An industrial controller has a 24 V buck converter, a fast SPI bus, and an Ethernet port in the same corner of a four-layer board. Before the first build, the engineer asks: "Review this board for EMC risks and fix what you find."
The agent finds the aggressors: the switching node of the buck, the SPI clock, the edge-rate-heavy nets. It runs the switching power stage check on the converter layout. It simulates crosstalk from SPI_CLK to the Ethernet pair and to the analog inputs across the frequency band. Where the coupling is too high, it moves the clock to an inner layer next to its reference plane, reroutes it away from the victims, and simulates the coupling again. You get the before and after plots and the changed routes in the same chat.
3. Power and heat, from the copper to the enclosure
A motor drive must deliver 10 A in a sealed enclosure with one fan. The engineer asks: "Make sure the power path and the thermal design hold at full load."
The agent sets the rail widths for the current and routes them. It analyzes PDN impedance with the vendor models of the capacitors, including their ESR and ESL, chooses decoupling capacitors for the target impedance, and simulates the voltage droop on a load step. Then it calculates the board temperatures from the component powers and simulates the air flow through the enclosure, with the vents, the fan, and the heatsink. When a part runs too hot, the agent changes the copper, the heatsink, or the vents, and runs the analysis again.
That workflow crosses the board and the mechanical design. In Flux, both are in the same project.
4. A mount that takes the load and still fits
A camera head on a robot arm sits on a machined aluminum bracket. The engineer asks: "Make the bracket lighter, but keep the deflection under 0.1 mm at the rated load, and make sure it still fits."
The agent runs a stress and deflection analysis of the bracket, removes material where the stress is low, and runs the analysis again until it meets the deflection target. It recalculates the mass and the center of mass for the joint loads of the arm. It checks fit and clearance against the board, the cable, and the arm, and runs a tolerance stack-up on the mounting holes. Then it checks the bracket against the limits of CNC milling, so the part you get back is a part a shop can make.
5. A late enclosure change, carried through the whole device
The industrial design of a handheld gateway changes late. The new enclosure moves the antenna connector 4 mm and makes the board outline narrower. The engineer asks: "Take the new enclosure and update the device."
The agent checks the fit of the board in the new enclosure and finds the parts that now collide. It moves the connector, reroutes only the affected nets, and keeps every other route as it is. It routes the 50 Ω feed again with no vias and rounded bends, and simulates S11 and the input impedance of the new feed. Then it runs the design rule check and the fit check on the assembled device. One change in the mechanical design, carried through placement, routing, simulation, and checks, without a meeting between two teams.
6. A release check across the board and the mechanical parts
On Friday, the team wants to order the first build of a sensor gateway: the board, a 3D-printed enclosure, and a CNC-machined heat spreader. The engineer asks: "Check everything for manufacturing and get me quotes."
The agent runs the electrical and design rule checks against the manufacturer's rules, and checks every part against its datasheet. It exports the fabrication files and checks them: copper gaps in the Gerbers against the fabricator's minimum spacing, the silkscreen, the board outline, and the BOM and pick-and-place files against the board. It checks the enclosure for SLA printing and the heat spreader for CNC milling. It packages the results and the layer images in a report. Then it gets quotes for the board and the mechanical parts, in the same project.
Before and with Flux
| Workflow | Before | With Flux |
|---|---|---|
| DDR and PCIe timing | Budget in a spreadsheet, meanders by hand, export to a field solver, days | One request: routed, tuned, and simulated in hours |
| EMC review | A review meeting, then manual reroutes and a second simulation round | The agent finds, simulates, reroutes, and simulates again |
| Power and thermal | PDN tool, thermal tool, and airflow tool, each set up by hand | One analysis from the copper to the enclosure air flow |
| Bracket redesign | CAD change, FEA setup, fit review, and a DFM review, a week | Lighter, checked, and machinable in an afternoon |
| Late enclosure change | STEP files back and forth between teams for days | Fit, reroute, simulate, and check in one project |
| Release check | Checklists, a Gerber viewer, and quote requests by email | One report and quotes for the board and the mechanical parts |
Why this only works in an AI-first tool
In a desktop editor, a capability exists when the vendor ships a dialog for it. In Flux, a capability exists when the agent can reach it. The agent has the router, the length tuner, the circuit, electromagnetic, thermal, flow, and structural simulations, the design rule checks, the fit checks, and the manufacturing checks, all on the same live project. Every combination of them is a workflow you can ask for.
That changes the question you ask about a tool. Not "does it have a button for this?" but "can it get me the result?" And the result is what counts: a device that works when it is built. Read how to evaluate AI PCB design, and see the building blocks in agentic routing and EM simulation of your routed board.
Prompts to try
- "Route the DDR byte lanes to the strobe within 0.25 mm of skew, then simulate the eye at the data rate."
- "Route the PCIe lanes as 85 Ω pairs, then compare SDD21 with the connector vendor's .s2p file."
- "Review this board for EMC risks. Simulate crosstalk from SPI_CLK to the Ethernet pair, and reroute what fails."
- "Check the power path at 10 A: trace widths, PDN impedance, load-step droop, and board temperature."
- "Simulate the air flow through the enclosure with the fan at full speed, and change the vents if the MCU runs above 85 °C."
- "Make the bracket lighter, keep the deflection under 0.1 mm at 50 N, and check it for CNC milling."
- "Take the new enclosure, fix every part that collides, reroute the affected nets, and run the fit check."
- "Check the board, the enclosure, and the heat spreader for manufacturing, and get quotes for all three."
Read more in the docs: Route with Flux and Simulation.
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FAQ
An editor feature does one job, such as routing, length tuning, or simulation. The Flux agent combines those jobs into one workflow. It routes, tunes, simulates, checks, and changes the design until the result meets your target, for the board and the mechanical parts.
Yes. Ask Flux to route the byte lanes and the differential pairs to your timing targets. Flux matches lengths and skew within your tolerance, reports the lane lengths, and simulates the routed copper with S-parameters, differential impedance, and an eye diagram.
Yes. Ask Flux to review the board for EMC risks. Flux finds the noisy nets, checks the switching power stages, simulates crosstalk to the sensitive nets, reroutes where the coupling is too high, and simulates again.
Yes. Flux analyzes stress, deflection, mass, fit, clearance, tolerance stack-ups, and air flow in the enclosure, and checks mechanical parts for 3D printing and CNC milling. The board and the mechanical design are in one project, so one request can change both.
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