agentmods.dev

vtchat: Instructions file for Codex

AGENTS.md

vtchat AGENTS.md is an instructions file for Codex, OpenCode from vinhnx/vtchat. It costs 3,323 tokens per session, scanned A, a copy of vtchat copilot-instructions.md, MIT.

A project guide for AI coding assistants working on vtchat. It defines the repository's monorepo layout, technology stack, package-management rules, naming and formatting conventions, and UI practices.

In plain words
What is it for?
Use it to guide edits in the web app and shared packages, especially package commands, environment variables, exports, code formatting, and component conventions.
Why use it?
It provides shared rules for making changes that fit the existing codebase rather than introducing different tools or styles.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions AGENTS.md; mentions OpenCode.

This is vinhnx/vtchat's own configuration. It tells Codex and OpenCode how to work on vtchat itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything vtchat configures →

not rated 59repo 1mo ago A scan 3,323 tokens copy · 89% MIT
View source ↗ vinhnx/vtchat
Reuse

Borrowing it

Nothing to install: this file belongs to vinhnx/vtchat. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/vinhnx/vtchat/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/vinhnx/vtchat

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for vtchat AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/vinhnx/vtchat/agents-md/github.svg)](https://agentmods.dev/instructions/vinhnx/vtchat/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/vinhnx/vtchat/agents-md"><img src="https://agentmods.dev/badge/instructions/vinhnx/vtchat/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.

agentmods 80×15 button for vtchat AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/vinhnx/vtchat/agents-md"><img src="https://agentmods.dev/badge/instructions/vinhnx/vtchat/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3,323 This file is loaded in full into every session.
When invoked 3,323 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 89% copy Near-identical to another mod 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 5.1 $0.03323 $0.03323
Opus 5.5 $0.01329 $0.01329
Sonnet 5.5 $0.00665 $0.00665
Haiku 4.5 $0.00332 $0.00332

Measured today against content hash f12f66daf8ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

vtchat 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 today.

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.

Origin

This is a copy

89% identical to vtchat copilot-instructions.md — 15 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 340 lines

How it starts

The opening of the file, as written. The whole thing — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Tech Stack & Project Overview

  • Monorepo: Turborepo-managed, with apps/ (main: Next.js web app) and packages/ (shared code: common, shared, ai, ui, etc.).
  • Core Technologies: Next.js 15 (App Router), React 19.0.0, TypeScript, Tailwind CSS, shadcn/ui, Zustand, Drizzle ORM (Neon PostgreSQL), Better-Auth, Framer Motion, Lucide icons.
  • AI/Agents: Agentic Graph System in packages/ai/ (supports OpenAI, Anthropic, Google, Groq, etc.).
  • Best Practices: Use environment variables, enums for string keys, named exports, shadcn/ui for UI, Bun for all scripts, and document changes in memory-bank/.

Package Management

  • Use bun instead of npm for all operations

Code Style

  • Make sure no string in #codebase, use enum pattern.
  • Don't hard code values in the codebase.
  • Use environment variables for configuration (e.g., API keys, product IDs, ADMIN_USER_IDS for Better-Auth admin access - supports comma-separated user IDs)
  • Use centralize enum for custom reusable keys.
  • 4-space indentation, single quotes, 100 char line length
  • PascalCase components, camelCase hooks/utils, kebab-case files
  • Named exports preferred over default exports
  • Use oxlint for fast comprehensive linting (run bun run lint)
  • Use dprint for code formatting (run bun run fmt)
  • Use Prettier for markdown files only (run bun run format)

UI/UX Design Principles

  • Minimal Design: Follow shadcn/ui principles with clean, minimal aesthetics
  • No Colors: Use only black/white/muted colors (avoid gradients, bright colors)
  • Minimal Icons: Reduce icon usage to essentials only
  • Clean Typography: Rely on typography hierarchy over visual decorations
  • Neutral Palette: Use text-muted-foreground, bg-muted, standard shadcn colors
  • Simple Interactions: Avoid flashy animations or complex visual effects

Development Workflow

  • Make sure you DO NOT CREATE ANY debug and test FILES IN ./ ROOT DIRECTORY. Only use files in /temps or apps/web/app/tests/ or /scripts.
  • Make sure you run bun dev and check the app console to see if there are any errors before starting to work on anothers task. fix it first.
  • Plan first, then implement. For substantial changes, request maintainer feedback on the plan before coding.
  • REQUIRED: Run bun run fmt to auto-fix formatting issues with dprint
  • NEVER commit changes yourself - DO NOT execute git commit unless you have my approval
  • Run bun run lint (oxlint) for comprehensive error checking
  • Run bun run build to verify compilation before major changes
  • Test core functionality after significant changes

Read the full file on GitHub · 340 lines

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. today First seen · 340 lines · 3,323 tokens per session scan A f12f66daf8ef

Subscribe to this mod's changes

vtchat AGENTS.md is an instructions file published in the GitHub repository vinhnx/vtchat (59 stars, last pushed 1mo ago), licensed MIT. It adds 3,323 tokens to every session, about $0.0133 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to vtchat copilot-instructions.md, differing in 15 lines, and is treated as a copy.

Building agentsLLMaiaisdkchatbotnextjsshadcn-ui
Related

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).

microsoft/vscode · 9,649 tokens

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.

vercel/next.js · 7,257 tokens

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).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

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.

deepseek-ai/deepseek-harness · 4,159 tokens

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).

microsoft/vscode · 2,731 tokens