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 skills add 0-AI-UG/cate --skill cate-cligit 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/skills/0-ai-ug/cate/cate-cli)<a href="https://agentmods.dev/skills/0-ai-ug/cate/cate-cli"><img src="https://agentmods.dev/badge/skills/0-ai-ug/cate/cate-cli/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/skills/0-ai-ug/cate/cate-cli"><img src="https://agentmods.dev/badge/skills/0-ai-ug/cate/cate-cli.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00169 | $0.01329 |
| Opus 5.5 | $0.00068 | $0.00532 |
| Sonnet 5.5 | $0.00034 | $0.00266 |
| Haiku 4.5 | $0.00017 | $0.00133 |
Grade A, and why
cate-cli 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cate CLI
cate talks to the workspace's runtime over the local socket named by
CATE_SOCKET, authenticated by CATE_TOKEN, a per-terminal token that also
names the calling panel. It works the same when the workspace lives on
another machine. If either variable is missing, cate exits 3 and says so:
you are not in a Cate terminal, so this skill does not apply.
Reference files
Read the one for your task before its first command:
references/browser.md: the browser panel. Snapshots and element ids, clicking and typing, tabs, uploads, dialogs, saved logins and sign-ups, console and network logs, screenshots.references/agents.md: starting other coding agents, sending them prompts, waiting for and reading their answers, and typing into terminals that have no agent.
Panels, terminals, editors and Review panels are covered below.
Permissions
Each area needs its permission in the workspace's Settings → CLI: the master switch "Command-line control (cate CLI)" plus a Read and a Control cell per area (Browser, Browser passwords, Terminal, Panels, Files, Agents & reviews). Sending keystrokes to terminals (Terminal, Control) and using saved browser passwords are off by default. A denied call fails with an error naming the setting: tell the person which one to turn on instead of working around it.
Help, output and exit codes
The CLI's own help is the reference for exact syntax. Check it before guessing a flag:
cate --help # command groups and global flags
cate panel --help # the commands of one group (or just: cate panel)
cate review note add --help # one command: arguments, flags and defaults
A mistyped command suggests the closest one. Lists print as aligned tables,
other results as key value lines, structured reports as indented JSON.
Add --json to any command when you parse the result or need full ids.
Every error says what to do next.
Exit codes: 0 ok, 1 the call failed, 2 usage error (Cate was not contacted), 3 not connected to Cate.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago Changed · -1 lines 69da5d7aff8d
- 10d ago Changed · -158 lines · +133 tokens per session f853d20362b3
- 11d ago Changed · +91 lines · -1 tokens per session ec631e3fe6df
- 28d ago Changed · +6 lines 1bfcefe6b053
- 1mo ago Changed · -21 lines 1d359f4c5187
- 1mo ago Changed · +4 lines e591f12d3048
- 1mo ago Changed · +29 lines e2c93c569b4d
- 1mo ago Changed · -45 lines 7f94479f8f66
- 1mo ago Changed · +39 lines · +2 tokens per session 7b3255e56133
- 1mo ago First seen · 196 lines · 35 tokens per session scan A 6463326d42af
cate-cli is a skill published in the GitHub repository 0-AI-UG/cate (2,212 stars, last pushed yesterday), licensed MIT. It adds 169 tokens to every session and 1,329 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-08-30.
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