Jujutsu (jj) usage
SkillDev toolsTeaches your agent to use the Jujutsu (jj) version control tool in the Carbon repository.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the Jujutsu (jj) usage skill
About this capability
Instructions for using Jujutsu (jj) for version control in the Carbon repository.
What this skill tells your AI
The instructions your AI receives, as published by carbon-language/carbon-lang in .agents/skills/jj/SKILL.md and read by ahel’s review.
Jujutsu is a Git-compatible version control system that may be used in Carbon checkouts.
[!IMPORTANT] You can detect if Jujutsu is in use by checking for a
.jjdirectory in the repository root. If present, you must usejjand must not usegit. If absent, you must not usejj.
General usage
Always use the --no-pager flag when invoking jj to prevent the command from
blocking or waiting for terminal paging.
Common commands
Syncing with remote
- Fetch from remote:
jj --no-pager git fetch - Create a new change on top of trunk:
jj --no-pager new trunk - Show repository status:
jj --no-pager status - Show commit history:
jj --no-pager log
Managing changes
- View diff of current changes:
jj --no-pager diff - Commit changes:
jj --no-pager commit- Note: Prefer using
jj commitover the combination ofjj describeandjj new.
- Note: Prefer using
- Abandon/discard current changes:
jj --no-pager abandon - Rebase current change onto trunk:
jj --no-pager rebase -o trunk
Signals
- GitHub stars
- 34k
- Forks
- 2k
- Last commit
- Sep 2026
Advanced
- Catalog kind
- skill
- Gateway key
jujutsu-jj-usage- Source
- github.com/carbon-language/carbon-lang