Borrowing it
Nothing to install: this file belongs to yuri-semenenko/ai-engineering-workspace. 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/yuri-semenenko/ai-engineering-workspace/main/AGENTS.mdgit clone --depth 1 https://github.com/yuri-semenenko/ai-engineering-workspaceWrote 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/yuri-semenenko/ai-engineering-workspace/agents-md)<a href="https://agentmods.dev/instructions/yuri-semenenko/ai-engineering-workspace/agents-md"><img src="https://agentmods.dev/badge/instructions/yuri-semenenko/ai-engineering-workspace/agents-md.svg" alt="Measured on agentmods" 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 | $0.02302 | $0.02302 |
| Opus 5 | $0.01151 | $0.01151 |
| Sonnet 5 | $0.00460 | $0.00460 |
| Haiku 4.5 | $0.00230 | $0.00230 |
Grade B, and why
ai-engineering-workspace 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 3d 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.
`persona/copilot-instructions.md`, `claude-code/.claude/settings.json` — How it starts
The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Repository contract for ai-engineering-workspace, and tool-agnostic: Codex and
Gemini CLI read it directly, Copilot CLI and VS Code read it as agent
instructions, and root CLAUDE.md imports it for Claude Code. It is a router —
what is specific to this repository, plus a link to the document explaining each
rule. It does not restate the README, the persona, the methodology, or the skill
catalog.
Purpose
A portable methodology layer for using AI to do software engineering, shipped to four assistants: Claude Code, Codex, GitHub Copilot, and Gemini CLI.
Instruction layers
Six layers reach an assistant from here. Put a change in the layer that owns it.
| Layer | Owner | Loading model |
|---|---|---|
| Persona | persona/*.template.md |
generated by the wizard, installed per tool |
| Methodology | docs/principles/ |
prose, read on demand |
| Repository contract | that repository's root AGENTS.md |
always-on repository context |
| Skills | each tool's skills/commands/prompts directory | task-triggered |
| Adapters | claude-code/, codex/, copilot/, gemini/ |
tool-native delivery by the installers |
| Guardrails | settings.example.json, scripts/, scripts/hooks/, CI |
mechanically enforced |
Persona and methodology are global and shared. A repository contract is neither: never copy persona, methodology, or a whole skill into one.
Six files share two filenames
Tool discovery dictates both names, so none of these can be renamed. Always say which one you mean by its path.
| Path | Scope |
|---|---|
AGENTS.md (root) |
this repository's contract — the file you are reading |
codex/AGENTS.md |
personal and global; installed to $CODEX_HOME/AGENTS.md |
copilot/workspace-template/AGENTS.md |
a template for another repository; not in force here |
CLAUDE.md (root) |
this repository's Claude Code adapter: the active @AGENTS.md import plus any Claude-only delta |
copilot/workspace-template/CLAUDE.md |
the @AGENTS.md adapter shipped with that template; not in force here |
persona/CLAUDE.md |
the developer's generated persona, gitignored, installed to ~/.claude/CLAUDE.md |
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.
- 3d ago First seen · 166 lines · 2,302 tokens per session scan B dcaacd53533c
ai-engineering-workspace AGENTS.md is an instructions file published in the GitHub repository yuri-semenenko/ai-engineering-workspace (1 stars, last pushed 7d ago), licensed MIT. It adds 2,302 tokens to every session, about $0.0115 per session on Opus 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 2026-09-05.
Other instructions, from other repositories
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.
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.
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).
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).
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.
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.