A workflow for documenting signal contracts and calculating Karnaugh maps, diagrams used to simplify Boolean decision logic, in spreadsheet workbooks. It mirrors the logic from RTL hardware code and checks that references have not drifted.

Use it when documenting or reviewing decision logic in hardware engines, schedulers, or arbiters.

It makes interface behavior and combinational decisions easier to review while detecting when the workbook no longer matches the source code.

How sean-galloway/RTLDesignSherpa configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sean-galloway/RTLDesignSherpa. 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/sean-galloway/RTLDesignSherpa/main/.claude/skills/kmaps/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/sean-galloway/RTLDesignSherpa

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/sean-galloway/rtldesignsherpa/kmaps/github.svg)](https://agentmods.dev/skills/sean-galloway/rtldesignsherpa/kmaps)

Your own site

<a href="https://agentmods.dev/skills/sean-galloway/rtldesignsherpa/kmaps"><img src="https://agentmods.dev/badge/skills/sean-galloway/rtldesignsherpa/kmaps/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/sean-galloway/rtldesignsherpa/kmaps"><img src="https://agentmods.dev/badge/skills/sean-galloway/rtldesignsherpa/kmaps.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 172 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 original 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	$0.00048	$0.00172
Opus 5	$0.00024	$0.00086
Sonnet 5	$0.00010	$0.00034
Haiku 4.5	$0.00005	$0.00017

Measured 9d ago against content hash 671cb2033764, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

kmaps 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 9d 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/kmaps/SKILL.md · 14 lines

What it actually says

kmaps

READ FIRST: vault/handbook/design/signal-contracts-and-kmaps.md (the handbook is the repo's memory; this skill is the signpost). Maps are COMPUTED from mirrored RTL with a citation-drift check. Methodology: bin/SIGNAL_CONTRACTS_KMAPS.md.

The handbook root is vault/handbook/INDEX.md - design/, dv/, fpga/ areas, atomic notes, wikilinked. When you learn a durable lesson in this domain, ADD IT TO THE HANDBOOK NOTE, not to this skill.

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.

9d ago First seen · 14 lines · 48 tokens per session scan A 671cb2033764

Subscribe to this mod's changes

kmaps is a skill published in the GitHub repository sean-galloway/RTLDesignSherpa (23 stars, last pushed today), licensed MIT. It adds 48 tokens to every session and 172 once invoked, about $0.0002 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 2026-08-30.

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Build discounted cash flow valuation workbooks in Excel.

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Audit a spreadsheet for formula accuracy, errors, and common mistakes. Scopes to a selected range, a single sheet, or the entire model (including financial-model integrity checks like BS balance, cash tie-out, and logic sanity). Triggers on "audit this sheet", "check my formulas", "find formula errors", "QA this…

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RTLDesignSherpa: Skill for Claude Code