A coding guide for Pyrope, LiveHD’s hardware description language (HDL). HDL is a programming language used to describe electronic circuits, and the guide covers .prp files, Verilog conversion, and Pyrope syntax.

Use it when creating or changing .prp files, converting Verilog to or from Pyrope, or answering Pyrope syntax questions.

It gives an agent the rules needed to write or edit Pyrope code correctly instead of treating it like ordinary software.

How masc-ucsc/livehd configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to masc-ucsc/livehd. 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/masc-ucsc/livehd/master/.claude/skills/pyrope/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/masc-ucsc/livehd

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/masc-ucsc/livehd/pyrope/github.svg)](https://agentmods.dev/skills/masc-ucsc/livehd/pyrope)

Your own site

<a href="https://agentmods.dev/skills/masc-ucsc/livehd/pyrope"><img src="https://agentmods.dev/badge/skills/masc-ucsc/livehd/pyrope/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/masc-ucsc/livehd/pyrope"><img src="https://agentmods.dev/badge/skills/masc-ucsc/livehd/pyrope.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 664 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.

Model	Per session	Once invoked
Fable 5.1	$0.00088	$0.00664
Opus 5.5	$0.00035	$0.00266
Sonnet 5.5	$0.00018	$0.00133
Haiku 4.5	$0.00009	$0.00066

Measured 25d ago against content hash 21ce18c12d5a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pyrope 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 25d ago.

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/pyrope/SKILL.md · 39 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

25d ago Changed · -1,011 lines · +49 tokens per session 21ce18c12d5a
1mo ago Changed · +376 lines 6b5445b6c096
1mo ago Changed 46d320fa12f9
1mo ago Changed · +4 lines 62c4e6b09bbe
1mo ago Changed · +2 lines 86efb35ce2ef
2mo ago Changed · +18 lines d5edff1a0126
2mo ago First seen · 650 lines · 39 tokens per session scan A ca70cd46e795

Subscribe to this mod's changes

pyrope is a skill published in the GitHub repository masc-ucsc/livehd (255 stars, last pushed today), with no licence file. It adds 88 tokens to every session and 664 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-30.

Hardware and IoT asic fpga hdl live simulation synthesis

pyrope next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pyropemasc-ucsc/livehd	Skill	255	today	none	A	88	Claude Code
hsb-ip-packetizerNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	40	Claude Code, Codex
hsb-ip-create-topNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	37	Claude Code, Codex
evaluating-cosmos-policyOrchestra-Research/AI-Research-SKILLs	Skill	14k	27d ago	MIT	A	51	Claude Code
hsb-ip-defNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	62	Claude Code, Codex
dart-iodartsim/dart	Skill	1.2k	yesterday	BSD-2-Clause	A	27	Claude Code, Codex
vivado-cdc-auditmapleleavessssssss-wq/vivado-mcp	Skill	172	4d ago	Apache-2.0	A	58	Claude Code, Codex

livehd: Skill for Claude Code