Borrowing it
Nothing to install: this file belongs to githubnext/rig. 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/githubnext/rig/main/AGENTS.mdgit clone --depth 1 https://github.com/githubnext/rigWrote 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/githubnext/rig/agents-md)<a href="https://agentmods.dev/instructions/githubnext/rig/agents-md"><img src="https://agentmods.dev/badge/instructions/githubnext/rig/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/githubnext/rig/agents-md"><img src="https://agentmods.dev/badge/instructions/githubnext/rig/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 | $0.01203 | $0.01203 |
| Opus 5.5 | $0.00481 | $0.00481 |
| Sonnet 5.5 | $0.00241 | $0.00241 |
| Haiku 4.5 | $0.00120 | $0.00120 |
Grade A, and why
rig 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 18d 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 — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project Overview
Rig is a minimal TypeScript agent harness. The core runtime (skills/rig/rig.ts) provides declarative agent construction with typed input/output shapes, prompt intents, and a Copilot SDK runtime.
Architecture
skills/rig/rig.ts — Core runtime (agent, p, copilotEngine, schemas)
skills/rig/samples/ — Markdown sample programs; see skills/rig/samples.md for pattern buckets and task families
src/samples/ — TypeScript examples and provider integration fixtures
skills/rig/ — Focused documentation loaded on demand from SKILL.md
src/engines/copilot.test.ts — Copilot engine unit tests (vitest)
src/rig.test.ts — Unit tests (vitest)
scripts/run-sample.test.ts — Sample runner with a stub Copilot SDK client (dry-run)
skills/rig/SKILL.md — Compact skill entry point and reference router
All imports use the "rig" path alias (resolved via tsconfig paths + vitest alias). copilotEngine is exported directly from rig for client construction.
Commands
| Task | Command |
|---|---|
| Typecheck | npm run typecheck |
| Unit tests | npm test |
| Run samples (stub) | npm run sample |
| Refresh sample catalog | npm run sample:catalog |
| Check catalog and duplicate programs | npm run sample:check |
| Run single sample (stub) | RIG_SAMPLE=02 npm run sample |
| Run a sample for real | echo "<input>" | node skills/rig/rig.ts <program-file> (npm run sample:run) |
Code Style
- Keep the core (
skills/rig/rig.ts) self-contained;@github/copilot-sdkis imported directly inskills/rig/rig.ts - Minimal comments; code should be self-explanatory
- Use
node:prefix for Node.js built-in imports - Types are colocated with the module that defines them, not in separate
.d.tsfiles - Trailing underscore on object keys (
key_) means optional field - Use
smallas the model identifier in examples, tests, and defaults - Do not add legacy compatibility bridges; update callers, samples, and docs to the current API
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.
- 18d ago Changed · +4 lines · +135 tokens per session 5ced735b7f3f
- 22d ago Changed · -13 tokens per session 6e869040442b
- 1mo ago First seen · 75 lines · 1,081 tokens per session scan A 133953ccc91c
rig AGENTS.md is an instructions file published in the GitHub repository githubnext/rig (14 stars, last pushed today), licensed MIT. It adds 1,203 tokens to every session, about $0.0048 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
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.
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).
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.