Babel: Skill for Claude Code

.claude/skills/bb-rtl-coder/SKILL.md

bb-rtl-coder is a skill for Claude Code from amoslee2026/Babel. It costs 70 tokens per session (7,705 once invoked), scanned B, original, GPL-3.0.

A skill for writing synthesizable SystemVerilog RTL from microarchitecture documents. RTL is the hardware logic that can be turned into a circuit, and synthesizable code is suitable for that process.

In plain words
What is it for?
Use it to implement finite-state machines, datapaths, and other RTL described in MAS or similar microarchitecture documents.
Why use it?
It helps turn a hardware design plan into implementation code while keeping the result suitable for hardware synthesis.

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-rtl-coder/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-rtl-coder

README.md
[![agentmods](https://agentmods.dev/badge/skills/amoslee2026/babel/bb-rtl-coder.svg)](https://agentmods.dev/skills/amoslee2026/babel/bb-rtl-coder)
Your own site
<a href="https://agentmods.dev/skills/amoslee2026/babel/bb-rtl-coder"><img src="https://agentmods.dev/badge/skills/amoslee2026/babel/bb-rtl-coder.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,705 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00070 $0.07705
Opus 5 $0.00035 $0.03853
Sonnet 5 $0.00014 $0.01541
Haiku 4.5 $0.00007 $0.00771

Measured yesterday against content hash 7bc10e891e2c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade B, and why

bb-rtl-coder scanned grade B with 1 finding 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 yesterday.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/compute_spec_hash.py, scripts/generate_regmap_assertions.py, scripts/generate_regmap_doc.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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

cat ~/.claude/ctx_budget.env 2>/dev/null || echo "SAFE_TOKENS=100000"
.claude/skills/bb-rtl-coder/SKILL.md · 935 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. yesterday First seen · 935 lines · 70 tokens per session scan B 7bc10e891e2c

Subscribe to this mod's changes

bb-rtl-coder is a skill published in the GitHub repository amoslee2026/Babel (42 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 70 tokens to every session and 7,705 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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