gf-sim

Automate SystemVerilog simulation with Verilator and emit GateFlow result blocks.

101|13|Updated Jan 28, 2026
One-click install
npx skills add https://github.com/codejunkie99/Gateflow-Plugin --skill gf-sim
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: gf-sim
Source: https://github.com/codejunkie99/Gateflow-Plugin/tree/main/plugins/gateflow/skills/gf-sim
Command: npx skills add https://github.com/codejunkie99/Gateflow-Plugin --skill gf-sim

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill automates SystemVerilog simulation by auto-detecting DUT and testbenches, compiling with Verilator, executing the run, and emitting a parseable GateFlow result block.

Core Features & Use Cases

  • DUT/Testbench auto-detection: Distinguishes DUT and testbench files to drive the Verilator flow.
  • Verilator-based Simulation: Compiles and runs SV sources with tracing support for waveform generation.
  • Structured Output: Returns a standardized result block that can be orchestrated by downstream tools.
  • Use Case: Plug SV projects into Claude Code to validate RTL modules and verify testbenches with a single command.

Quick Start

Use the gf-sim skill to simulate your SV project by providing sources in rtl/ and tb/ and running the simulation.

Frequently Asked Questions about gf-sim

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate SystemVerilog simulation with Verilator?▼

Automating SystemVerilog simulation with Verilator involves auto-detecting DUT and testbench files, compiling sources with tracing, and executing the run to produce a parseable GateFlow result block.

What is a parseable simulation result block and why use it for RTL verification?▼

A parseable simulation result block is a standardized output format that enables downstream orchestration tools to automatically consume and evaluate RTL verification test pass and fail statuses.

How do I structure my project to auto-detect DUT and testbench files?▼

To auto-detect DUT and testbench files, structure your project by placing RTL modules in the rtl/ directory and testbenches in the tb/ directory before running the simulation flow.

Does Verilator support waveform tracing for SystemVerilog testbenches?▼

Verilator supports waveform tracing for SystemVerilog testbenches during compilation, enabling waveform generation to help debug and validate RTL modules and assertions.

Can I use Claude Code to validate RTL modules end-to-end?▼

You can plug SystemVerilog projects into Claude Code to validate RTL modules and verify testbenches with a single command, driving end-to-end compilation and simulation.

What are the limitations of using Verilator for SystemVerilog simulation?▼

Verilator simulation is limited to SystemVerilog projects leveraging Verilator for RTL verification, requiring proper DUT and testbench classification to successfully compile and execute the run.