Agentic Tools is a marketplace of plugins and skills for managing Meta Social Technologies applications, including settings, webhooks, compliance, app review, and API health. Developers use it with coding agents such as Claude Code, Cursor, and Codex through Meta's remote MCP server. The catalogue contains the project's agent add-ons.
Borrowing it
Nothing to install: this file belongs to facebook/agentic-tools. 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/facebook/agentic-tools/main/AGENTS.mdgit clone --depth 1 https://github.com/facebook/agentic-toolsWrote 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/facebook/agentic-tools/agents-md)<a href="https://agentmods.dev/instructions/facebook/agentic-tools/agents-md"><img src="https://agentmods.dev/badge/instructions/facebook/agentic-tools/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/facebook/agentic-tools/agents-md"><img src="https://agentmods.dev/badge/instructions/facebook/agentic-tools/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 | $0.02062 | $0.02062 |
| Opus 5.5 | $0.00825 | $0.00825 |
| Sonnet 5.5 | $0.00412 | $0.00412 |
| Haiku 4.5 | $0.00206 | $0.00206 |
Grade B, and why
agentic-tools AGENTS.md scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- **Codex**: install via `$skill-installer`, and add the MCP to `~/.codex/config.toml` (see README). How it starts
The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Guide — Agentic Tools
This file helps AI agents navigate and use this repository effectively.
What this repo is
A skills repository for AI coding agents that provides workflow-oriented guidance for the Meta Social Technologies Developer Platform. Skills wrap the Meta Social Technologies MCP server tools into higher-level workflows for app management, webhook configuration, compliance auditing, app review preparation, API health monitoring, and documentation search.
Naming
These names are user-facing and easy to conflate. Use them exactly as written; do not invent variants.
| Thing | Canonical name | Notes |
|---|---|---|
| This repo / marketplace | Meta Agentic Tools | displayName in both marketplace manifests. Docs headings use the shorter "Agentic Tools", since the facebook/agentic-tools repo path already supplies the "Meta". |
The plugin (devtools) |
Meta Social Technologies Developer | Never append "plugin" to the name itself; write "the Meta Social Technologies Developer plugin". |
| The platform | Meta Social Technologies Developer Platform | developers.facebook.com. Also known as "Meta for Developers: Social Technologies". Note the plugin name is a prefix of this one, so avoid using both in the same sentence. |
| The MCP server | Meta Social Technologies MCP | Formerly "Meta Developer Tools MCP". Server id is still devtools; tools are still prefixed devtools_. |
| The skills | kebab-case ids | app-health-check, webhook-setup, etc. No branding in skill names. |
The plugin description is a single shared string, byte-identical across all five manifests. Change it in one place and propagate it to the other four.
devtools is a frozen identifier, not a name. It is the plugin id, the MCP server key in every mcp.json, the mcp__devtools__devtools_* tool namespace in all nine skills' allowed-tools, the plugins/devtools/ path, and the devtools@facebook install target. It is pinned to the MCP endpoint https://mcp.facebook.com/devtools, so it does not follow display-name changes. Renaming it breaks existing installs.
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.
- 6d ago Changed · +4 lines · +55 tokens per session 009cc47d00a5
- 1mo ago Changed · +16 lines · +423 tokens per session 3f20f45bc257
- 1mo ago First seen · 94 lines · 1,584 tokens per session scan B 2ce37fb90f2d
agentic-tools AGENTS.md is an instructions file published in the GitHub repository facebook/agentic-tools (15 stars, last pushed 6d ago), licensed MIT. It adds 2,062 tokens to every session, about $0.0082 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). 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.