Borrowing it
Nothing to install: this file belongs to zaber-dev/free-ai-gateway. 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/zaber-dev/free-ai-gateway/main/AGENTS.mdgit clone --depth 1 https://github.com/zaber-dev/free-ai-gatewayWrote 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/zaber-dev/free-ai-gateway/agents-md)<a href="https://agentmods.dev/instructions/zaber-dev/free-ai-gateway/agents-md"><img src="https://agentmods.dev/badge/instructions/zaber-dev/free-ai-gateway/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 | $0.00955 | $0.00955 |
| Opus 5 | $0.00477 | $0.00477 |
| Sonnet 5 | $0.00191 | $0.00191 |
| Haiku 4.5 | $0.00096 | $0.00096 |
Grade A, and why
free-ai-gateway 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 7d 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 — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
🤖 Free-AI Gateway - Agentic Development Guidelines
Target Audience: AI Coding Assistants, Autonomous Agents, and Pair Programmers (Antigravity, Claude Code, Cursor, GitHub Copilot, Codex, Gemini).
🏛️ Monorepo Architecture & Package Boundaries
This repository is organized as an Enterprise TypeScript Monorepo using npm workspaces. Every agent working in this codebase MUST respect the strict architectural separation between layers:
free-ai-gateway/ (Monorepo Root)
├── packages/
│ ├── core/ → @free-ai-gateway/core (Pure, protocol-neutral AI orchestration engine)
│ ├── mcp/ → @free-ai-gateway/mcp (Model Context Protocol server for AI agents)
│ ├── skills/ → @free-ai-gateway/skills (Agentic IDE skills & installer CLI)
│ └── cli/ → @free-ai-gateway/cli (Developer CLI & terminal AI assistant)
├── apps/
│ └── gateway/ → @free-ai-gateway/gateway (Fastify HTTP server with OpenAI-compatible API)
└── tests/
└── e2e/ → Cross-package end-to-end integration tests
🛑 Strict Architectural Rules for Agents
-
Core HTTP Boundary:
@free-ai-gateway/coreMUST NEVER import or depend on HTTP server frameworks (e.g. Fastify, Express, Koa).- Core only contains client transport (
HttpClient) for upstream provider communication.
-
No Background Timers in Core:
- Core must remain synchronous, deterministic, and pure.
- Background workers (like
JobSchedulerandreverify.ts) belong exclusively toapps/gateway.
-
Single Public Entrypoint Imports:
- Downstream packages (
packages/mcp,packages/skills,apps/gateway) MUST ONLY import from@free-ai-gateway/corepublic exports (packages/core/src/index.ts). - Deep imports into internal files (e.g.
@free-ai-gateway/core/src/resilience/circuit-breaker) are strictly prohibited.
- Downstream packages (
-
Protocol-Neutral Representations:
- Core works exclusively with
UnifiedRequestandUnifiedResponse. - Protocol-specific adaptations (e.g., OpenAI chat completion format) happen in
apps/gateway/src/adapters/openai.ts.
- Core works exclusively with
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.
- 7d ago First seen · 93 lines · 955 tokens per session scan A 4ca05046616f
free-ai-gateway AGENTS.md is an instructions file published in the GitHub repository zaber-dev/free-ai-gateway (13 stars, last pushed 14d ago), licensed MIT. It adds 955 tokens to every session, about $0.0048 per session on Opus 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
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).
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.
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 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).
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.