Cognitohazard

Use when writing or editing LTspice circuit netlists (.cir, .net, .sp), working with LTspice schematics (.asc), or interpreting simulation results (.raw, .log). Covers LTspice-specific SPICE syntax, behavioral sources, waveform sources, .MEAS, parameters, convergence, and common gotchas that cause silent errors. Use this skill whenever the user mentions LTspice, circuit simulation, filter design, frequency response, transient analysis, or any SPICE netlist work targeting LTspice.

Use when writing or editing ngspice circuit netlists (.cir, .sp, .spice), working with ngspice scripting (.control blocks), or interpreting simulation results. Covers ngspice-specific SPICE syntax, behavioral sources, .control scripting, Monte Carlo via control loops, parameters, XSPICE, .save, .MEAS, convergence, and common gotchas that cause silent errors. Use this skill whenever the user mentions ngspice, or is writing SPICE netlists targeting ngspice rather than LTspice.