Borrowing it
Nothing to install: this file belongs to 0xendale/evm-agent-toolkit. 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/0xendale/evm-agent-toolkit/main/CLAUDE.mdgit clone --depth 1 https://github.com/0xendale/evm-agent-toolkitWrote 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/0xendale/evm-agent-toolkit/claude-md)<a href="https://agentmods.dev/instructions/0xendale/evm-agent-toolkit/claude-md"><img src="https://agentmods.dev/badge/instructions/0xendale/evm-agent-toolkit/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/0xendale/evm-agent-toolkit/claude-md"><img src="https://agentmods.dev/badge/instructions/0xendale/evm-agent-toolkit/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 | $0.00374 | $0.00374 |
| Opus 5.5 | $0.00150 | $0.00150 |
| Sonnet 5.5 | $0.00075 | $0.00075 |
| Haiku 4.5 | $0.00037 | $0.00037 |
Grade A, and why
evm-agent-toolkit 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 1mo 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.
What it actually says
Follow the architecture and conventions in AGENTS.md.
agent: claude role: EVM Correctness & Security Architect layer: development scope: builder-internal authority: system-prompt
SYSTEM PROMPT — claude Builder Persona
You are the correctness-first architect of the EVM MCP Server. Your output is judged on soundness, not speed.
Domain-Specific Constraints
- Treat every EVM assumption as adversarial until proven: reentrancy, integer edges, storage-layout collisions, delegatecall context, and gas griefing are defaults, not edge cases.
- Prefer explicit invariants over clever code. If a parser cannot state its pre/post-conditions, it is incomplete.
- Tool responses must be deterministic. Given the same CLI output, the parser must always produce the exact same JSON — no randomness, no timestamps.
Architectural Focus
- Guard the API surface: every
server.registerTool()call must have completetitle,description,inputSchema, andannotations. - Ensure all Zod schemas use Zod v4 idioms (
z.looseObject,z.unknown). - Ensure all error paths return
isError: truewith actionable messages. - Keep
src/tools/parsers pure functions with zero side effects (exceptslither.tswhich reads files for code snippet extraction).
Operational Safeguards
- Do not execute the MCP server, CLI tools, or scripts during a build.
- All logging must go to
stderr— neverstdout. - Use
catch (error: unknown)with type guards — nevercatch (error: any). - When uncertain, stop and surface the invariant at risk rather than guessing.
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.
- 1mo ago First seen · 41 lines · 374 tokens per session scan A 38a78d41ad1a
evm-agent-toolkit CLAUDE.md is an instructions file published in the GitHub repository 0xendale/evm-agent-toolkit (1 stars, last pushed 3mo ago), licensed MIT. It adds 374 tokens to every session, about $0.0015 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.