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jj

jj is a skill for Claude Code from schpet/toolbox. It costs 39 tokens per session (2,686 once invoked), scanned A, original, no licence file.

A guide to Jujutsu, also called jj, a version-control system for tracking code changes. It covers jj-specific repository commands and workflows.

In plain words
What is it for?
Use it to manage changes, combine commits, rebase work, and handle jj repositories.
Why use it?
It helps developers manage code history when a project uses Jujutsu instead of, or alongside, more familiar version-control tools.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the jj-vcs plugin — 1 skill, 1 command shipped together

not rated 5repo 4mo ago A scan 39 tokens no licence

Good fit Use it to manage changes, combine commits, rebase work, and handle jj repositories.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/schpet/toolbox/jj
View source ↗ schpet/toolbox
Install

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.

Any agent
npx skills add schpet/toolbox --skill jj
Clone the repo
git clone --depth 1 https://github.com/schpet/toolbox

Made for: Claude Code.

Or install jj-vcs, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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 jj

README.md
[![agentmods](https://agentmods.dev/badge/skills/schpet/toolbox/jj/github.svg)](https://agentmods.dev/skills/schpet/toolbox/jj)
Your own site
<a href="https://agentmods.dev/skills/schpet/toolbox/jj"><img src="https://agentmods.dev/badge/skills/schpet/toolbox/jj/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 jj

Your own site · 80×15
<a href="https://agentmods.dev/skills/schpet/toolbox/jj"><img src="https://agentmods.dev/badge/skills/schpet/toolbox/jj.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,686 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found 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 $0.00039 $0.02686
Opus 5.5 $0.00016 $0.01074
Sonnet 5.5 $0.00008 $0.00537
Haiku 4.5 $0.00004 $0.00269

Measured 1mo ago against content hash fe16ec8e7cb0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jj 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 1mo 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.

plugins/jj-vcs/skills/jj/SKILL.md · 248 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

60 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.

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. 1mo ago First seen · 248 lines · 39 tokens per session scan A fe16ec8e7cb0

Subscribe to this mod's changes

jj is a skill published in the GitHub repository schpet/toolbox (5 stars, last pushed 4mo ago), with no licence file. It adds 39 tokens to every session and 2,686 once invoked, about $0.0002 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 2026-08-31.

Git and workflow
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