safety-case

safety-case is a skill for Claude Code from jassics/awesome-claude-security. It costs 63 tokens per session (535 once invoked), scanned A, original, GPL-3.0.

A structured safety argument for deploying an AI system, supported by evidence about harms, evaluations, safeguards, fairness, and governance.

In plain words
What is it for?
Use it to support a go/no-go decision, formal sign-off, or audit for an AI system.
Why use it?
It turns a deployment decision into a documented case that can be reviewed or audited.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ai-safety-engineer plugin — 2 skills, 1 command, 1 agent shipped together

Good fit Use it to support a go/no-go decision, formal sign-off, or audit for an AI system.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jassics/awesome-claude-security/safety-case
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 jassics/awesome-claude-security --skill safety-case
Clone the repo
git clone --depth 1 https://github.com/jassics/awesome-claude-security

Made for: Claude Code.

Or install ai-safety-engineer, the plugin that ships this one along with the rest of its 2 skills, 1 command, 1 agent.

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 safety-case

README.md
[![agentmods](https://agentmods.dev/badge/skills/jassics/awesome-claude-security/safety-case/github.svg)](https://agentmods.dev/skills/jassics/awesome-claude-security/safety-case)
Your own site
<a href="https://agentmods.dev/skills/jassics/awesome-claude-security/safety-case"><img src="https://agentmods.dev/badge/skills/jassics/awesome-claude-security/safety-case/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 safety-case

Your own site · 80×15
<a href="https://agentmods.dev/skills/jassics/awesome-claude-security/safety-case"><img src="https://agentmods.dev/badge/skills/jassics/awesome-claude-security/safety-case.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 535 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 $0.00063 $0.00535
Opus 5 $0.00032 $0.00267
Sonnet 5 $0.00013 $0.00107
Haiku 4.5 $0.00006 $0.00053

Measured 9d ago against content hash 18107d18537c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

safety-case 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.

plugins/ai-safety-engineer/skills/safety-case/SKILL.md · 52 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. 9d ago First seen · 52 lines · 63 tokens per session scan A 18107d18537c

Subscribe to this mod's changes

safety-case is a skill published in the GitHub repository jassics/awesome-claude-security (6 stars, last pushed 1mo ago), licensed GPL-3.0. It adds 63 tokens to every session and 535 once invoked, about $0.0003 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 2026-08-31.

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