Babel: Skill for Claude Code

.claude/skills/bb-invoke-yosys/SKILL.md

bb-invoke-yosys is a skill for Claude Code from amoslee2026/Babel. It costs 144 tokens per session (2,300 once invoked), scanned A, original, GPL-3.0.

A hardware-design workflow that uses Yosys 0.35 to turn RTL—code describing digital circuits—into a gate-level netlist mapped to ASAP7 standard cells. It also produces a quality report and can run several synthesis jobs in parallel.

In plain words
What is it for?
Use it to generate a netlist after timing and clock-domain checks, or to re-synthesize RTL when physical-design feedback shows that area or path limits are exceeded.
Why use it?
It removes the manual work of creating synthesis scripts, checking results, and repeating synthesis when area or timing targets are missed.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

This is amoslee2026/Babel's own configuration. It tells Claude Code how to work on Babel itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Babel configures →

Reuse

Borrowing it

Nothing to install: this file belongs to amoslee2026/Babel. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/amoslee2026/Babel/master/.claude/skills/bb-invoke-yosys/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/amoslee2026/Babel

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for bb-invoke-yosys

README.md
[![agentmods](https://agentmods.dev/badge/skills/amoslee2026/babel/bb-invoke-yosys/github.svg)](https://agentmods.dev/skills/amoslee2026/babel/bb-invoke-yosys)
Your own site
<a href="https://agentmods.dev/skills/amoslee2026/babel/bb-invoke-yosys"><img src="https://agentmods.dev/badge/skills/amoslee2026/babel/bb-invoke-yosys/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for bb-invoke-yosys

Your own site · 80×15
<a href="https://agentmods.dev/skills/amoslee2026/babel/bb-invoke-yosys"><img src="https://agentmods.dev/badge/skills/amoslee2026/babel/bb-invoke-yosys.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 144 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,300 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00144 $0.02300
Opus 5 $0.00072 $0.01150
Sonnet 5 $0.00029 $0.00460
Haiku 4.5 $0.00014 $0.00230

Measured 3d ago against content hash 5d01fc221da3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

bb-invoke-yosys scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (scripts/generate_synthesis_config.py, scripts/parse_qor.py, scripts/render_yosys_tcl.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/bb-invoke-yosys/SKILL.md · 194 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 194 lines · 144 tokens per session scan A 5d01fc221da3

Subscribe to this mod's changes

bb-invoke-yosys is a skill published in the GitHub repository amoslee2026/Babel (42 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 144 tokens to every session and 2,300 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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