Borrowing it
Nothing to install: this file belongs to eupassarin/simplesign. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/eupassarin/simplesign/main/CLAUDE.mdgit clone --depth 1 https://github.com/eupassarin/simplesignWrote 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.
[](https://agentmods.dev/instructions/eupassarin/simplesign/claude-md)<a href="https://agentmods.dev/instructions/eupassarin/simplesign/claude-md"><img src="https://agentmods.dev/badge/instructions/eupassarin/simplesign/claude-md/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.
<a href="https://agentmods.dev/instructions/eupassarin/simplesign/claude-md"><img src="https://agentmods.dev/badge/instructions/eupassarin/simplesign/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01154 | $0.01154 |
| Opus 5.5 | $0.00462 | $0.00462 |
| Sonnet 5.5 | $0.00231 | $0.00231 |
| Haiku 4.5 | $0.00115 | $0.00115 |
Grade A, and why
simplesign CLAUDE.md 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 13d 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.
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md — Claude Code Project Instructions
Project Overview
SimpleSign is a .NET library for PAdES (PDF Advanced Electronic Signatures). It signs, validates, and inspects digitally signed PDF documents following ETSI EN 319 142 standards.
Key principle: All cryptography uses System.Security.Cryptography from the .NET BCL — no BouncyCastle, no third-party crypto.
Build & Test Commands
# Build everything
dotnet build
# Run all unit tests (~1,600 tests)
dotnet test tests/unit/
# Run specific test project
dotnet test tests/unit/SimpleSign.PAdES.Tests
dotnet test tests/unit/SimpleSign.Core.Tests
dotnet test tests/unit/SimpleSign.Pdf.Tests
dotnet test tests/unit/SimpleSign.Brasil.Tests
dotnet test tests/unit/SimpleSign.HtmlToPdf.Tests
# Integration tests (requires network for TSA/OCSP)
dotnet test tests/integration/
# Interop tests (cross-platform signature verification)
dotnet test tests/interop/
# AOT smoke test
dotnet publish tests/smoke/SimpleSign.AotSmokeTest -r linux-x64
# Mutation testing
dotnet stryker
Architecture
src/
├── SimpleSign/ Meta-package
├── SimpleSign.Core/ Crypto primitives: CMS, TSA, OCSP, CRL, hashing
├── SimpleSign.Pdf/ PDF structure: xref, objects, incremental save, fields
├── SimpleSign.PAdES/ PAdES signing, validation, inspection (main package)
├── SimpleSign.CAdES/ standalone CMS/PKCS#7 signing & validation
├── SimpleSign.Brasil/ ICP-Brasil: chain validation, CPF/CNPJ, Gov.br
├── SimpleSign.HtmlToPdf/ HTML→PDF layout engine (independent, no signing)
├── SimpleSign.Cli/ CLI tool
└── SimpleSign.HostSigner/ Signing service host
Coding Conventions
- Target frameworks: net8.0 and net10.0 (multi-target)
- Language version: C# 13
- Nullable: enabled globally
- Analysis:
AnalysisMode=All,TreatWarningsAsErrors=true,EnforceCodeStyleInBuild=true - Style rules enforced as errors: IDE0022 (expression bodies), IDE0011 (braces required on if/foreach), IDE0055 (formatting)
- AOT compatible: no reflection-based serialization, no
dynamic - No unsafe code:
AllowUnsafeBlocks=false - Documentation: all public APIs must have XML docs (
GenerateDocumentationFile=true)
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.
- 13d ago First seen · 136 lines · 1,154 tokens per session scan A f962a7e8d8d7
simplesign CLAUDE.md is an instructions file published in the GitHub repository eupassarin/simplesign (18 stars, last pushed yesterday), licensed MIT. It adds 1,154 tokens to every session, about $0.0046 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 2026-10-14.
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