Borrowing it
Nothing to install: this file belongs to kernel/kernel-mcp-server. 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/kernel/kernel-mcp-server/main/AGENTS.mdgit clone --depth 1 https://github.com/kernel/kernel-mcp-serverWrote 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/kernel/kernel-mcp-server/agents-md)<a href="https://agentmods.dev/instructions/kernel/kernel-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/kernel/kernel-mcp-server/agents-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/kernel/kernel-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/kernel/kernel-mcp-server/agents-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 | $0.01120 | $0.01120 |
| Opus 5.5 | $0.00448 | $0.00448 |
| Sonnet 5.5 | $0.00224 | $0.00224 |
| Haiku 4.5 | $0.00112 | $0.00112 |
Grade A, and why
kernel-mcp-server AGENTS.md scanned grade A with 1 finding 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 10d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
# In another terminal, send MCP requests with curl: How it starts
The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Project Setup Guide
Package Manager
IMPORTANT: This project uses bun as the package manager. You MUST use bun for all dependency management operations.
- DO NOT use
npm,yarn, orpnpm - ALWAYS use
bun installto install dependencies - ALWAYS use
bun add <package>to add new dependencies - ALWAYS use
bun remove <package>to remove dependencies
The lock file is bun.lock - never commit changes from other package managers.
Installing Dependencies
bun install
Environment Setup
-
Copy the example environment file:
cp .env.example .env.local -
Fill in the required environment variables (values can be found in 1password > DevEnvVars > MCP section)
Development
Start the development server:
bun run dev
The server runs on port 3002 by default.
Build
Build the project for production:
bun run build
Production
Start the production server:
bun run start
Code Quality
Linting
Run ESLint (via Next.js):
bun run lint
Formatting
This project uses Prettier for code formatting.
Check formatting:
bun run format:check
Fix formatting issues:
bun run format
Prettier formats the following file types: *.ts, *.js, *.json, *.md
MCP responses
Model-facing JSON (tool results and resources) is compact: use jsonResponse or JSON.stringify(value) without indentation.
Project Structure
src/- Source code directorypublic/- Static assetsnext.config.ts- Next.js configurationtsconfig.json- TypeScript configuration
Tech Stack
- Framework: Next.js 16
- Language: TypeScript
- Styling: Tailwind CSS 4
- Authentication: Clerk
- Package Manager: Bun (required)
Cursor Cloud specific instructions
Running commands
Always use make targets instead of raw bun commands to ensure 1Password (op) injects secrets from the .env file:
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.
- 10d ago Changed · +4 lines · +30 tokens per session 685c946970cb
- 2mo ago First seen · 151 lines · 1,090 tokens per session scan A de40f303c14f
kernel-mcp-server AGENTS.md is an instructions file published in the GitHub repository kernel/kernel-mcp-server (38 stars, last pushed today), licensed MIT. It adds 1,120 tokens to every session, about $0.0045 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.