create-gsn-diagram

create-gsn-diagram is a skill for Claude Code from grahama1970/agent-skills. It costs 54 tokens per session (1,362 once invoked), scanned A, original, no licence file.

A compliance-diagram tool for creating GSN argument diagrams and exporting them as SACM 2.2 XML. GSN shows how claims, evidence, and reasoning support a goal.

In plain words
What is it for?
It is for mapping taxonomy context, linking OSCAL evidence, and attaching Lean4 proof references to compliance arguments.
Why use it?
It helps organize compliance claims and their supporting evidence in a structured diagram and exchange that model in a standards-based format.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit It is for mapping taxonomy context, linking OSCAL evidence, and attaching Lean4 proof references to compliance arguments.

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Install with agentmods
npx agentmods add skills/grahama1970/agent-skills/create-gsn-diagram
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add grahama1970/agent-skills --skill create-gsn-diagram
Clone the repo
git clone --depth 1 https://github.com/grahama1970/agent-skills

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 create-gsn-diagram

README.md
[![agentmods](https://agentmods.dev/badge/skills/grahama1970/agent-skills/create-gsn-diagram/github.svg)](https://agentmods.dev/skills/grahama1970/agent-skills/create-gsn-diagram)
Your own site
<a href="https://agentmods.dev/skills/grahama1970/agent-skills/create-gsn-diagram"><img src="https://agentmods.dev/badge/skills/grahama1970/agent-skills/create-gsn-diagram/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 create-gsn-diagram

Your own site · 80×15
<a href="https://agentmods.dev/skills/grahama1970/agent-skills/create-gsn-diagram"><img src="https://agentmods.dev/badge/skills/grahama1970/agent-skills/create-gsn-diagram.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,362 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00054 $0.01362
Opus 5 $0.00027 $0.00681
Sonnet 5 $0.00011 $0.00272
Haiku 4.5 $0.00005 $0.00136

Measured 9d ago against content hash 195794301abd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

create-gsn-diagram scanned grade A 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 9d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (run.sh, sanity.sh), 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

# Or verify: curl -s http://127.0.0.1:8529/_api/version
skills/create-gsn-diagram/SKILL.md · 177 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

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.

  1. 9d ago First seen · 177 lines · 54 tokens per session scan A 195794301abd

Subscribe to this mod's changes

create-gsn-diagram is a skill published in the GitHub repository grahama1970/agent-skills (6 stars, last pushed today), with no licence file. It adds 54 tokens to every session and 1,362 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.