What is agent-kit AGENTS.md?

A set of project instructions describing the repository, its folders, development setup, and important commands. AGENTS.md is a file that tells coding agents how to work in a project.

Use it to understand the repository layout, set up development tools, and find conventions for skills, agents, MCP servers, and infrastructure.

It gives an agent the project context and local rules needed to navigate the codebase consistently.

How mitodl/agent-kit configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to mitodl/agent-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/mitodl/agent-kit/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/mitodl/agent-kit

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/mitodl/agent-kit/agents-md/github.svg)](https://agentmods.dev/instructions/mitodl/agent-kit/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/mitodl/agent-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/mitodl/agent-kit/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/mitodl/agent-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/mitodl/agent-kit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3,068 This file is loaded in full into every session.

When invoked 3,068 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.03068	$0.03068
Opus 5.5	$0.01227	$0.01227
Sonnet 5.5	$0.00614	$0.00614
Haiku 4.5	$0.00307	$0.00307

Measured today against content hash db3bec7b7322, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-kit 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 today.

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.

AGENTS.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project Overview

A shared toolkit of AI agent utilities for the mitodl team: reusable skills, custom agent definitions, MCP server configurations, and sample agent configs. The primary artifact is a catalog of SKILL.md files, plus MCP server registrations, installed declaratively via agent-config-kit (agent-kit) and this repo's agent-config.toml manifest.

Repository Layout

skills/          # Reusable skills (SKILL.md per skill), organized by category
  python/        # uv, cyclopts CLI conventions
  dagster/       # dg-based code location structure
  infrastructure/ # Pulumi IaC, Vault K8s auth
  containers/    # Docker image builds with uv
  workflow/      # validate-before-commit, skill authoring
  process/       # GitHub issues/PRs/RFCs, standup, dependency management
custom-agents/   # Agent definitions for Claude Code and GitHub Copilot
mcp/             # MCP server install helpers and config snippets
  servers/witan/         # Graph-structured memory MCP server (Python)
    ui/                  # Its web UI (TypeScript/Vite) -- built into witan/ui_dist,
                         # shipped inside the wheel, NOT independently versioned
  servers/witan-code/    # Tree-sitter code-graph MCP server (Python)
  servers/toolhive-swe/  # ToolHive SWE MCP config (per-tier: ci/qa/prod)
packages/        # Standalone, independently-versioned Python libraries
  agent-config-kit/      # Cross-agent MCP/skill/hook registration library
  agent-kit/              # PyPI meta-package (ol-agent-kit): agent-config-kit[cli] + witan + witan-code
configs/         # Sample / reference agent configurations
docs/            # The witan-context documentation site (Zensical -> Read the Docs)
  getting-started/  # Tutorials (handwritten)
  guides/           # How-to (mostly MIRRORED from the packages by bin/gen_docs.py)
  reference/        # GENERATED from live code by bin/gen_docs.py -- never edit
  explanation/      # Architecture, memory model, coordination, ADRs
  internals/        # Historical design docs and implementation specs

Read the full file on GitHub · 136 lines

Changes

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.

today Changed db3bec7b7322
1mo ago Changed e13fefcf9e7c
1mo ago Changed · +5 lines · +183 tokens per session 662c2adc0c6f
1mo ago Changed · +21 lines · +618 tokens per session 0991b39e002d
2mo ago First seen · 110 lines · 2,267 tokens per session scan A c36065c382b6

Subscribe to this mod's changes

agent-kit AGENTS.md is an instructions file published in the GitHub repository mitodl/agent-kit (5 stars, last pushed today), licensed BSD-3-Clause. It adds 3,068 tokens to every session, about $0.0123 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.

agent-kit AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agent-kit AGENTS.mdmitodl/agent-kit	Instructions file	5	today	BSD-3-Clause	A	3,068	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,649	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	1,907	GitHub Copilot

agent-kit: Instructions file for Codex