github-router AGENTS.md

Repository instructions for github-router, a reverse proxy that makes GitHub Copilot available through APIs compatible with OpenAI and Anthropic.

In plain words
What is it for?
Building, developing, linting, testing, type-checking, and starting github-router while following its code style.
Why use it?
They give coding agents the project’s required commands, TypeScript rules, formatting conventions, and error-handling expectations.

Instructions file for CodexOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/animeshkundu/github-router/agents-md
Clone the repo
git clone --depth 1 https://github.com/animeshkundu/github-router

Made for: Codex, OpenCode.

Per session 443 This file is loaded in full into every session.
When invoked 443 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00443 $0.00443
Opus 5 $0.00221 $0.00221
Sonnet 5 $0.00089 $0.00089
Haiku 4.5 $0.00044 $0.00044

Measured 3d ago against content hash 4132fa46d2f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

github-router 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 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.

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.

AGENTS.md · 50 lines

What it actually says

github-router

A reverse proxy that exposes GitHub Copilot as OpenAI and Anthropic compatible API endpoints.

Build, Lint, and Test Commands

  • Build: bun run build (uses tsdown)
  • Dev: bun run dev
  • Lint: bun run lint (uses typescript-eslint + eslint-config-prettier)
  • Lint all: bun run lint:all
  • Lint & Fix staged files: bunx lint-staged
  • Test all: bun test
  • Test single file: bun test tests/create-chat-completions.test.ts
  • Typecheck: bun run typecheck
  • Start (prod): bun run start

Code Style Guidelines

  • Imports: Use ESNext syntax. Prefer absolute imports via ~/* for src/* (see tsconfig.json).
  • Formatting: Follows Prettier (with prettier-plugin-packagejson). Run bun run lint to auto-fix.
  • Types: Strict TypeScript (strict: true). Avoid any; use explicit types and interfaces.
  • Naming: Use camelCase for variables/functions, PascalCase for types/classes.
  • Error Handling: Use explicit error classes (see src/lib/error.ts). Avoid silent failures.
  • Unused: Unused imports/variables are errors (noUnusedLocals, noUnusedParameters).
  • Switches: No fallthrough in switch statements.
  • Modules: Use ESNext modules, no CommonJS.
  • Testing: Use Bun's built-in test runner. Place tests in tests/, name as *.test.ts.
  • Linting: Uses typescript-eslint + eslint-config-prettier. Includes TypeScript-aware linting and consistent formatting.
  • Paths: Use path aliases (~/*) for imports from src/.
Changes

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.

  1. 3d ago First seen · 50 lines · 443 tokens per session scan A 4132fa46d2f5

Subscribe to this mod's changes

github-router AGENTS.md is an instructions file published in the GitHub repository animeshkundu/github-router (5 stars, last pushed 3d ago), licensed MIT. It adds 443 tokens to every session, about $0.0022 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 2026-08-31.