Borrowing it
Nothing to install: this file belongs to esbmc/agent-marketplace. 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/esbmc/agent-marketplace/main/CLAUDE.mdgit clone --depth 1 https://github.com/esbmc/agent-marketplaceWrote 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/esbmc/agent-marketplace/claude-md)<a href="https://agentmods.dev/instructions/esbmc/agent-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/esbmc/agent-marketplace/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/esbmc/agent-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/esbmc/agent-marketplace/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 | $0.00687 | $0.00687 |
| Opus 5.5 | $0.00275 | $0.00275 |
| Sonnet 5.5 | $0.00137 | $0.00137 |
| Haiku 4.5 | $0.00069 | $0.00069 |
Grade A, and why
agent-marketplace 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 2mo 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 — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
This is a Claude Code plugin marketplace for ESBMC (Efficient SMT-based Context-Bounded Model Checker). It contains the esbmc-plugin which integrates ESBMC formal verification into Claude Code, enabling verification of C, C++, Python, Solidity, CUDA, and Java/Kotlin programs.
Architecture
This is a Claude Code plugin (not a traditional application). There is no build step, no tests, and no dependencies to install. The plugin consists entirely of markdown files and shell scripts that Claude Code interprets at runtime.
Commands (esbmc-plugin/commands/*.md): Define slash commands with YAML frontmatter (name, description, arguments) followed by step-by-step instructions Claude follows at invocation. Current commands: /verify <file> [checks] and /audit <file>.
Skills (esbmc-plugin/skills/*/SKILL.md): Auto-triggered by Claude Code when the user's message matches phrases listed verbatim in the skill's description frontmatter. The SKILL.md body is reference material Claude reads to guide the interaction. The description field is the trigger — changing it changes what phrases activate the skill.
Plugin manifest (esbmc-plugin/.claude-plugin/plugin.json): Declares the plugin's name, version, and author. The name field here is the plugin identifier used after @ in install commands.
Marketplace manifest (.claude-plugin/marketplace.json): Top-level registry mapping plugin names to source directories. The name field (esbmc-marketplace) is what users pass to /plugin marketplace add.
Workflow Preferences
- Never commit or push automatically. Always show proposed changes and get explicit approval first.
- When facing a non-trivial change, brainstorm approaches and present options before implementing anything.
- When intent is unclear or multiple reasonable paths exist, ask rather than assume.
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.
- 2mo ago First seen · 47 lines · 687 tokens per session scan A 8dc073d7a096
agent-marketplace CLAUDE.md is an instructions file published in the GitHub repository esbmc/agent-marketplace (5 stars, last pushed 1mo ago), licensed MIT. It adds 687 tokens to every session, about $0.0027 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 2026-08-31.
agent-marketplace CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agent-marketplace CLAUDE.mdesbmc/agent-marketplace | Instructions file | 5 | 1mo ago | MIT | A | 687 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,685 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,086 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 280k | 2d ago | MIT | A | 4,325 | Codex, OpenCode |