Borrowing it
Nothing to install: this file belongs to FleetAdmiralJakob/chat-io. 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/FleetAdmiralJakob/chat-io/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/FleetAdmiralJakob/chat-ioWrote 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/fleetadmiraljakob/chat-io/copilot-instructions)<a href="https://agentmods.dev/instructions/fleetadmiraljakob/chat-io/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/fleetadmiraljakob/chat-io/copilot-instructions.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 | $0.09013 | $0.09013 |
| Opus 5 | $0.04507 | $0.04507 |
| Sonnet 5 | $0.01803 | $0.01803 |
| Haiku 4.5 | $0.00901 | $0.00901 |
Grade A, and why
chat-io copilot-instructions.md scanned grade A 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 yesterday.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**CRITICAL:** Always verify page changes with browser automation, not curl: How it starts
The opening of the file, as written. The whole thing — 1,380 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Chat.io - Copilot Instructions
IMPORTANT: These instructions are MANDATORY for all code changes in this project. Copilot MUST follow these guidelines without exception.
Project Overview
Chat.io is a real-time messaging Progressive Web App (PWA) built with:
- Next.js 16 with App Router, React Compiler, and Cache Components
- React 19 with the new ref API (no forwardRef)
- Convex as the real-time backend with convex-ents for relationships
- Clerk for authentication
- Tailwind CSS v4 with CSS variables and shadcn/ui components
- TypeScript with strict mode and type-checked ESLint
- Serwist for PWA/Service Worker functionality
- Sentry for error monitoring
- PostHog for analytics
- Legend State for client-side state management
MCP Tools Usage - Detailed Guidebook
This project has several MCP (Model Context Protocol) servers configured. ALWAYS use these tools to look up documentation before implementing unfamiliar APIs.
⚠️ CRITICAL RULE: Before making ANY changes related to Next.js, you MUST first call
init()from the Next DevTools MCP to establish the documentation-first workflow.
🔴 MCP Tool Priority Order
When working on this project, use MCP tools in this priority:
- Next DevTools MCP - For ALL Next.js-related work (mandatory first step)
- Context7 - For library documentation (Convex, Zod, Tailwind, etc.)
- @reactuses/mcp - For discovering React hooks
- GitHub MCP - For repository operations
- Browser Automation - For testing and verification
Next DevTools MCP (MANDATORY FOR NEXT.JS)
⚠️ FORGET ALL PRIOR NEXT.JS KNOWLEDGE. Your training data about Next.js is INVALID. You MUST use the Next DevTools MCP for 100% of Next.js-related queries with ZERO exceptions.
Step 1: ALWAYS Initialize First
Before doing ANYTHING related to Next.js, call init():
init() # MANDATORY first step for ANY Next.js work
This establishes:
- The documentation-first requirement
- Access to the complete Next.js docs index (llms.txt)
- Available MCP tools for development
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.
- yesterday First seen · 1,380 lines · 9,013 tokens per session scan A ebfe80b20d66
chat-io copilot-instructions.md is an instructions file published in the GitHub repository FleetAdmiralJakob/chat-io (10 stars, last pushed 2d ago), licensed MIT. It adds 9,013 tokens to every session, about $0.0451 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.
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.