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yosys

95 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By autonomous-ai/openharness (GitHub) · coding · 1,487 stars · scanned at commit 92aa766

Write synthesisable Verilog-2005 for an iCE40 FPGA and take it to a bitstream — the language subset that synthesises, the testbench shape the pane draws waves from, the iCEBreaker pinout, how to read the utilisation and Fmax report, the mistakes that cost you a day (inferred latches, multi-driven nets, blocking assignments in sequential logic, missing reset), and ready-made UART / PWM / debounce blocks. Use whenever writing, simulating, synthesising or debugging RTL in this workspace.

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'yosys' ] || [ -L ~/.agents/skills/'yosys' ]; then echo 'A skill folder named yosys already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/autonomous-ai/openharness' "$d" && git -C "$d" checkout --quiet '92aa7660f44e222456248fc9ad16ed0e0f19d43f' -- 'store/agents/yosys/skills/yosys' && mkdir -p ~/.agents/skills && cp -R "$d"/'store/agents/yosys/skills/yosys' ~/.agents/skills/'yosys' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'yosys' ~/.claude/skills/'yosys' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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