Cate is an infinite, zoomable coding workspace that combines terminals, editors, and browsers while showing the status of multiple coding agents. It is for developers who run Claude Code, Codex, or other agent command-line tools in parallel and organize their branches with separate Git worktrees. The catalogue add-ons provide skills, agents, and instructions for using Cate.
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.
npx agentmods add instructions/0-ai-ug/cate/claude-mdgit clone --depth 1 https://github.com/0-AI-UG/cateWrote 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/0-ai-ug/cate/claude-md)<a href="https://agentmods.dev/instructions/0-ai-ug/cate/claude-md"><img src="https://agentmods.dev/badge/instructions/0-ai-ug/cate/claude-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 | $0.01387 | $0.01387 |
| Opus 5 | $0.00694 | $0.00694 |
| Sonnet 5 | $0.00277 | $0.00277 |
| Haiku 4.5 | $0.00139 | $0.00139 |
Grade A, and why
cate CLAUDE.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 6d 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.
This is a copy
89% identical to cate AGENTS.md — 14 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.
How it starts
The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Before You Code
Read and follow the karpathy-guidelines skill (.claude/skills/karpathy-guidelines) when writing, reviewing, or refactoring code here — surface assumptions, make surgical changes, keep it simple, and define verifiable success criteria.
Project Overview
Cate is a desktop application that provides an infinite zoomable canvas where editor panels, terminal panels, and browser panels float spatially (similar to Figma/Miro, but for coding). Built with Electron + React + TypeScript, styled with Tailwind CSS.
Build System
The Electron app lives at the project root. Uses electron-vite for bundling.
npm install # install dependencies
npm run dev # start dev server with hot reload
npm run build # production build
npm test # run vitest suite
Tests use Vitest and live alongside the code they cover (*.test.ts / *.test.tsx). A few git-touching tests assume a clean working repo and may fail when the dev tree has a branch named main or local modifications — those failures are environmental, not regressions.
Dependencies
Managed via npm (package.json):
- Electron — desktop shell (Chromium + Node.js)
- React 18 + react-dom — UI framework
- xterm.js (
@xterm/xterm) — terminal emulator with WebGL addon - node-pty — native PTY for terminal backend
- Monaco Editor — code editor (VS Code's editor component)
- zustand — lightweight state management
- chokidar — filesystem watching
- simple-git — git operations
- @phosphor-icons/react — icons
- electron-updater — auto-update (GitHub Releases)
Architecture
Process Model (Electron)
- Main process (
src/main/) — window management, IPC handlers, native APIs - Preload (
src/preload/) — secure bridge exposing IPC to renderer - Renderer (
src/renderer/) — React app with canvas UI
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.
- 6d ago First seen · 108 lines · 1,387 tokens per session scan A 62d965cbe0c5
cate CLAUDE.md is an instructions file published in the GitHub repository 0-AI-UG/cate (2,117 stars, last pushed today), licensed MIT. It adds 1,387 tokens to every session, about $0.0069 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to cate AGENTS.md, differing in 14 lines, and is treated as a copy.
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).
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 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.
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.