OpenMetadata is an open platform that organizes information about data, including its meaning, ownership, quality, history, and relationships. It provides governed context for data users, AI assistants, and agents that need to discover and understand trustworthy data.
Borrowing it
Nothing to install: this file belongs to open-metadata/OpenMetadata. 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/open-metadata/OpenMetadata/main/AGENTS.mdgit clone --depth 1 https://github.com/open-metadata/OpenMetadataWrote 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/open-metadata/openmetadata/agents-md)<a href="https://agentmods.dev/instructions/open-metadata/openmetadata/agents-md"><img src="https://agentmods.dev/badge/instructions/open-metadata/openmetadata/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/open-metadata/openmetadata/agents-md"><img src="https://agentmods.dev/badge/instructions/open-metadata/openmetadata/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 | $0.03871 | $0.03871 |
| Opus 5.5 | $0.01548 | $0.01548 |
| Sonnet 5.5 | $0.00774 | $0.00774 |
| Haiku 4.5 | $0.00387 | $0.00387 |
Grade A, and why
OpenMetadata 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 yesterday.
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.
This is a copy
100% identical to superpowers AGENTS.md — 249 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 201 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Always-loaded guidance for every session, whatever the harness — the only instruction file: every CLAUDE.md and
.github/copilot-instructions.md is a symlink to the AGENTS.md beside it
(ADR:2026-10-09-agents-md-is-the-one-instruction-file), so edit this file, never a copy. Language- and path-specific
rules live in .claude/rules/*.md (Claude Code auto-loads them on matching files; other harnesses read the matching
one before editing); procedures live in skills (loaded on invoke). This file is the map — see the pointer index at
the bottom. Read ARCHITECTURE.md for the system map (modules, the request/ingestion/search
paths, the invariants that hold); read DEVELOPER.md for how to build, test, and add an entity or
connector (deep dives + end-to-end checklists). Consult docs/index.md — the knowledge index —
to find existing design, plan, and reference docs for whatever area you're working on.
About OpenMetadata
OpenMetadata is a unified metadata platform for data discovery, observability, and governance — a multi-module project with a Java backend, a React/TypeScript frontend, a Python ingestion framework, and Docker infrastructure.
Stack at a glance
- Backend: Java 21 + Dropwizard, multi-module Maven.
- Frontend: React + TypeScript, built with Vite (dev server on :3000); component library
openmetadata-ui-core-components— the UntitledUI + Tailwind v4 (tw:prefix, react-aria-components) go-forward design system; legacy stack is Ant Design + Less (deprecated). Machine-readable design-system specs:openmetadata-ui/src/main/resources/ui/specs/(readspecs/README.mdbefore UI work). - Ingestion: Python (
>=3.10, no pinned ceiling; CI runs 3.10) + Pydantic 2.x, 75+ connectors. - Database: MySQL (default) or PostgreSQL. Search: Elasticsearch 7.17+ or OpenSearch 2.6+.
- Infrastructure: Apache Airflow for ingestion orchestration.
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.
- yesterday Changed · +26 tokens per session 0218c7180948
- 5d ago Changed · +22 tokens per session 04b37e2c8001
- 6d ago Changed · +200 lines · +3,819 tokens per session 685a6a2d77c2
- 1mo ago First seen · 1 lines · 4 tokens per session scan A 6ebdb617a810
OpenMetadata AGENTS.md is an instructions file published in the GitHub repository open-metadata/OpenMetadata (15,490 stars, last pushed today), licensed Apache-2.0. It adds 3,871 tokens to every session, about $0.0155 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to superpowers AGENTS.md, differing in 249 lines, and is treated as a copy.
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.
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.
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).