SPICE Simulation Skill

Automatically generates and runs SPICE testbenches for circuit subcircuits detected by the kicad skill's schematic analyzer. Supports ngspice, LTspice, and Xyce (auto-detected). Validates calculated values (filter frequencies, divider ratios, opamp gains) against actual simulation results and produces a structured report.

This skill inverts the typical simulation workflow: instead of requiring users to create simulation sources and configure analysis (which ~2.5% of KiCad users do), it generates targeted testbenches automatically from the analyzer's subcircuit detections.

Related Skills

Handoff guidance: The kicad skill's analyze_schematic.py produces the analysis JSON with subcircuit detections in the flat findings[] array (filtered by detector field). This skill reads that JSON, generates SPICE testbenches for simulatable subcircuits, runs the detected simulator (ngspice/LTspice/Xyce), and produces a structured verification report. Always run the schematic analyzer first. During a design review, run simulation after the analyzer and before writing the final report — simulation results should appear as a verification section in the report. The emc skill reuses this skill's simulator backend for SPICE-enhanced PDN impedance and EMI filter insertion loss checks — when ngspice is available, the EMC skill's --spice-enhanced flag activates these checks automatically.