Borrowing it
Nothing to install: this file belongs to debugmcp/mcp-debugger. 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/debugmcp/mcp-debugger/main/AGENTS.mdgit clone --depth 1 https://github.com/debugmcp/mcp-debuggerWrote 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/debugmcp/mcp-debugger/agents-md)<a href="https://agentmods.dev/instructions/debugmcp/mcp-debugger/agents-md"><img src="https://agentmods.dev/badge/instructions/debugmcp/mcp-debugger/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/debugmcp/mcp-debugger/agents-md"><img src="https://agentmods.dev/badge/instructions/debugmcp/mcp-debugger/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 | $0.01479 | $0.01479 |
| Opus 5.5 | $0.00592 | $0.00592 |
| Sonnet 5.5 | $0.00296 | $0.00296 |
| Haiku 4.5 | $0.00148 | $0.00148 |
Grade A, and why
mcp-debugger AGENTS.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 15d 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 — 37 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Module Organization
src/contains the TypeScript CLI and server core that power the Debug MCP runtime.packages/hosts 19 workspace modules. Fourteen carry their ownsrc/trees (@debugmcp/shared,adapter-mock,adapter-python,adapter-ruby,adapter-javascript,adapter-rust,adapter-go,adapter-java,adapter-dotnet,adapter-cpp,adapter-cobol,adapter-dart,codelldb-common,mcp-debugger); the other five —codelldb-win32-x64,codelldb-linux-x64,codelldb-linux-arm64,codelldb-darwin-x64,codelldb-darwin-arm64— are prebuilt CodeLLDB payloads with no TypeScript in them. Apackages/logs/may linger in a checkout that ran pre-#637 builds (server logs now default toos.tmpdir()/debug-mcp-server/); it is not a package and not in the repository —.gitignore'slogs/rule covers it.tests/is grouped by scope:unit/,core/unit/,adapters/*/,integration/,e2e/, plus shared utilities intests/test-utils/and fixtures undertests/fixtures/.docs/covers design notes;examples/hosts adapter recipes;scripts/stores CI helpers.- Build artifacts land in
dist/; recorded assets and Docker helpers live inassets/anddocker/.
Build, Test, and Development Commands
pnpm installsets up the monorepo (respect the generatedpnpm-lock.yaml).pnpm buildcompiles every package and emits the aggregateddist/index.js.pnpm devlaunches the TypeScript entry point viats-nodefor quick feedback.pnpm testperforms a full build, ensures Docker images are ready, and runs Vitest across all suites.- Targeted runs:
pnpm test:unit,pnpm test:integration,pnpm test:e2e,pnpm test:coverage. pnpm lintruns ESLint oversrc/**/*.ts,packages/*/src/**/*.ts,scripts/**/*.{js,mjs,cjs}, andtools/**/*.{js,mjs,cjs}(the dev-proxy supervisor is production tooling; experimental probes go inscripts/experiments/, which is ignored).pnpm lint:fixruns the same globs with--fix.pnpm typechecktype-checks the shipped sources viatsconfig.typecheck.json(no build needed; the roottsc -p tsconfig.jsonchecks nothing).pnpm typecheck:testsruns the per-file ratchet over the test trees againsttests/typecheck-baseline.json;pnpm typecheck:tests:updatere-records that baseline andpnpm typecheck:tests:rawemits unfilteredtscoutput.pnpm typecheck:allruns both, and is the exact command pre-push and CI run.- Run the whole dev-loop gate before pushing. It is lint -> baseline committed ->
typecheck:all-> clean build ->test:unit+test:integration, and both.husky/pre-pushand CI enforce it;typecheck:allis the step most likely to block a push. It is documented once, canonically, in CONTRIBUTING.md — Dev-Loop Gate. Follow that section rather than any restatement of it.
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.
- 15d ago Changed · +5 tokens per session 8fd0d2d9dcfa
- 1mo ago Changed · +7 tokens per session 71b347d3c16c
- 1mo ago Changed · -5 tokens per session 70f5bac9a365
- 1mo ago Changed · +2 lines · +681 tokens per session 50acd31317af
- 1mo ago First seen · 35 lines · 791 tokens per session scan A 31594ba8c7f6
mcp-debugger AGENTS.md is an instructions file published in the GitHub repository debugmcp/mcp-debugger (180 stars, last pushed today), licensed MIT. It adds 1,479 tokens to every session, about $0.0059 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 2026-08-30.
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).
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.