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.
Borrowing it
Nothing to install: this file belongs to 0-AI-UG/cate. 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/0-AI-UG/cate/main/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/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.
<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="Reviewed on agentmods" width="80" 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 | $0.03985 | $0.03985 |
| Opus 5.5 | $0.01594 | $0.01594 |
| Sonnet 5.5 | $0.00797 | $0.00797 |
| Haiku 4.5 | $0.00398 | $0.00398 |
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 11d 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 — 145 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 — 288 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 terminal, editor, browser and review panels float spatially (similar to Figma/Miro, but for coding), next to classic docked layouts. Built with Electron + React + TypeScript, styled with Tailwind CSS.
Each open workspace is served by its own runtime daemon, which holds the
workspace's state and does all its work (files, git, terminals, agents,
the cate API). The desktop app and the iOS app are clients of those
runtimes; other devices connect to the same runtime after pairing, and every
client sees one live workspace.
docs/architecture.md is the model: what every module is, where it lives,
what it owns and how the pieces talk. Read the sections for the area you touch
before changing it. Where the code disagrees with the document, the document
wins.
Build System
The Electron app lives at the project root. It uses electron-vite for the desktop shell and esbuild for the daemon and the CLI.
npm install # install dependencies
npm run dev # bundle the daemon, then start the app with hot reload (CDP on 9222; CATE_CDP_PORT=0 turns it off)
npm run build # production build of the desktop shell
npm run build:runtime # bundle the daemon to dist-runtime/runtime.cjs
npm run build:mobile # bundle the iOS app's client core to ios/Cate/Core/Web/core.js
npm run runtime:tarball # build the runtime tarball (daemon, Node, cate CLI, skills)
npm run runtime:dev # install this checkout's runtime into ~/.cate/runtime/<build>/ (no tarball; run by predev)
npm run typecheck # tsc --noEmit
npm run lint # eslint
npm run lint:deps # dependency-cruiser: layer, side and entry rules
npm test # vitest suite
npm run test:e2e # playwright e2e suite (e2e/)
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.
- 11d ago Changed · +183 lines · +2,655 tokens per session 0f2437e0f195
- 1mo ago Changed · +2 tokens per session e845bcaddbf9
- 1mo ago Changed · -3 lines · -59 tokens per session fdc21cec3e1e
- 2mo 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 (2,212 stars, last pushed yesterday), licensed MIT. It adds 3,985 tokens to every session, about $0.0159 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to cate AGENTS.md, differing in 145 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).
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.
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).
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 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).
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.