Borrowing it
Nothing to install: this file belongs to vibeeval/vibecosystem. 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/vibeeval/vibecosystem/main/AGENTS.mdgit clone --depth 1 https://github.com/vibeeval/vibecosystemWrote 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/vibeeval/vibecosystem/agents-md)<a href="https://agentmods.dev/instructions/vibeeval/vibecosystem/agents-md"><img src="https://agentmods.dev/badge/instructions/vibeeval/vibecosystem/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/vibeeval/vibecosystem/agents-md"><img src="https://agentmods.dev/badge/instructions/vibeeval/vibecosystem/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 | $0.00241 | $0.00241 |
| Opus 5.5 | $0.00096 | $0.00096 |
| Sonnet 5.5 | $0.00048 | $0.00048 |
| Haiku 4.5 | $0.00024 | $0.00024 |
Grade A, and why
vibecosystem 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 1mo 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.
What it actually says
vibecosystem
This repository contains Claude runtime components and a Codex luna_worker adapter.
The default runtime is core; full is opt-in. Do not treat the number of files in
the repository as the number of components injected into a session.
Working rules
- Inspect the relevant files and configuration before editing.
- Keep changes within the requested repository and task scope.
- Preserve unrelated user changes and do not expose credentials.
- Do not start swarm, memory, learner, or model-routing automation unless explicitly requested.
- The Codex worker uses
gpt-5.6-lunawithmaxreasoning. Project config must not override it. - Claude-only
opusandsonnetmetadata must not be used by Codex. - Prefer the smallest complete change and run focused verification afterward.
- Stop before destructive actions, external messages, or irreversible migrations that were not requested.
Validation
For hook changes run cd hooks && npm run check && npm test.
For installer or config changes run the dry-run path with a temporary HOME and parse all JSON/TOML.
Report changed paths, checks performed, and unresolved caveats.
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.
- 1mo ago First seen · 23 lines · 241 tokens per session scan A a6af64ffcb1a
vibecosystem AGENTS.md is an instructions file published in the GitHub repository vibeeval/vibecosystem (541 stars, last pushed 2mo ago), licensed MIT. It adds 241 tokens to every session, about $0.0010 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 2026-08-30.
Other instructions, from other repositories
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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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.