Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/microsoft/agents-for-js/claude-mdgit clone --depth 1 https://github.com/microsoft/Agents-for-jsWhat 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 | $0.02627 | $0.02627 |
| Opus 5 | $0.01314 | $0.01314 |
| Sonnet 5 | $0.00525 | $0.00525 |
| Haiku 4.5 | $0.00263 | $0.00263 |
Grade A, and why
Agents-for-js 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 2d 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 — 267 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 the Microsoft 365 Agents SDK for JavaScript/TypeScript (formerly known as BotFramework SDK v5). It provides a comprehensive framework for building enterprise-grade conversational agents that work across M365, Teams, Copilot Studio, Webchat, and other platforms.
The repository is a monorepo using npm workspaces with multiple interconnected packages.
Repository Structure
Core Packages (in packages/)
- agents-activity: Activity protocol types, validators, and schema definitions using Zod. Replaces
botframework-schema. - agents-hosting: Core hosting components including ActivityHandler, TurnContext, CloudAdapter, authentication, and state management. Replaces
botbuilder. - agents-hosting-express: Express.js integration for hosting agents.
- agents-hosting-fastify: Fastify integration for hosting agents.
- agents-hosting-dialogs: Dialog system for building conversational flows. Replaces
botbuilder-dialogs. - agents-hosting-directline-namedpipes: Direct Line transport over named pipes.
- agents-hosting-extensions-msteams: Teams-specific features (TaskModules, Messaging Extensions).
- agents-hosting-extensions-slack: Slack-specific integration and extensions.
- agents-hosting-extensions-teams: Deprecated legacy Teams extension retained for backward compatibility.
- agents-hosting-storage-blob: Azure Blob Storage adapter. Replaces
botbuilder-azure. - agents-hosting-storage-cosmos: CosmosDB storage adapter. Replaces
botbuilder-azure. - agents-copilotstudio-client: Direct-to-Engine client for interacting with Copilot Studio agents.
- agents-telemetry: Shared telemetry instrumentation for Microsoft 365 Agents SDK packages.
Test Agents (in test-agents/)
Sample agents used for internal testing ("samples"). For learning examples, refer to https://github.com/Microsoft/Agents.
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.
- 2d ago First seen · 267 lines · 2,627 tokens per session scan A 85ee61367b82
Agents-for-js CLAUDE.md is an instructions file published in the GitHub repository microsoft/Agents-for-js (87 stars, last pushed 5d ago), licensed MIT. It adds 2,627 tokens to every session, about $0.0131 per session on Opus 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).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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 oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.