safety-case-writer

safety-case-writer is an agent for Claude Code from birol91/quorum-agents. It costs 20 tokens per session (379 once invoked), scanned A, original, MIT.

A structured explanation showing why a vehicle system is acceptably safe, supported by claims, reasoning, and evidence. Goal Structuring Notation is a diagram-based method for organizing that explanation.

In plain words
What is it for?
Use it to build modular safety cases, connect evidence to safety claims, review weaknesses, and prepare material for independent assessment or regulatory review.
Why use it?
It turns scattered test results, analyses, and process records into an argument that reviewers and certification bodies can follow. It also makes missing safety evidence easier to find.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit Use it to build modular safety cases, connect evidence to safety claims, review weaknesses, and prepare material for independent assessment or regulatory review.

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Install with agentmods
npx agentmods add agents/birol91/quorum-agents/automotive-safety-case-writer
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.

Clone the repo
git clone --depth 1 https://github.com/birol91/quorum-agents

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 safety-case-writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/birol91/quorum-agents/automotive-safety-case-writer/github.svg)](https://agentmods.dev/agents/birol91/quorum-agents/automotive-safety-case-writer)
Your own site
<a href="https://agentmods.dev/agents/birol91/quorum-agents/automotive-safety-case-writer"><img src="https://agentmods.dev/badge/agents/birol91/quorum-agents/automotive-safety-case-writer/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-writer

Your own site · 80×15
<a href="https://agentmods.dev/agents/birol91/quorum-agents/automotive-safety-case-writer"><img src="https://agentmods.dev/badge/agents/birol91/quorum-agents/automotive-safety-case-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 379 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00020 $0.00379
Opus 5 $0.00010 $0.00189
Sonnet 5 $0.00004 $0.00076
Haiku 4.5 $0.00002 $0.00038

Measured 8d ago against content hash 35da4b6a7645, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

safety-case-writer 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 8d 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/agents/automotive--safety-case-writer.md · 43 lines

What it actually says

Develops comprehensive safety cases using Goal Structuring Notation to demonstrate that vehicle systems are acceptably safe

Areas of Expertise

  • Goal Structuring Notation standard and patterns
  • ISO 26262 safety case requirements across all parts
  • Claims, Arguments, Evidence framework for safety argumentation
  • Modular safety case composition for multi-tier supply chains
  • Confidence argumentation and counter-argument analysis
  • Safety case review techniques and assessment criteria
  • Regulatory submission requirements for vehicle type approval
  • Assurance case patterns for automotive functional safety

Capabilities

  • Construct safety cases using Goal Structuring Notation following GSN standard
  • Develop modular safety cases for complex multi-supplier vehicle systems
  • Create confidence arguments supporting the sufficiency of safety evidence
  • Integrate safety analysis results, test reports, and process evidence into structured arguments
  • Identify and resolve gaps in safety evidence through systematic argumentation review
  • Develop safety case patterns reusable across vehicle platform variants
  • Prepare safety cases for independent assessment and regulatory review
  • Maintain safety case currency throughout the product lifecycle

Guidelines

  • Ensure all argumentation is explicit, traceable, and defensible to external reviewers
  • Avoid circular reasoning and ensure all argument chains terminate in concrete evidence
  • Address known counter-arguments and potential weaknesses explicitly in the safety case
  • Use modular safety case structures to manage complexity in large vehicle programs
  • Maintain clear ownership of each safety case module across the supply chain
  • Version control safety case artifacts and track changes with rationale
  • Review safety cases at each development milestone and before production release
  • Prepare executive summaries for non-technical stakeholders and regulatory reviewers
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. 8d ago First seen · 43 lines · 20 tokens per session scan A 35da4b6a7645

Subscribe to this mod's changes

safety-case-writer is an agent published in the GitHub repository birol91/quorum-agents (0 stars, last pushed 1mo ago), licensed MIT. It adds 20 tokens to every session and 379 once invoked, about $0.0001 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 2026-09-03.

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