jj:split

Split the current commit into multiple commits grouped by function

majiayu000/claude-skill-registry-data·0installs23starsDevOps & CI/CD

SKILL.md

Full skill instructions

Split Commit by Function

Split a commit into multiple commits, grouping changes by functional purpose.

Process

Run jj status to check if splitting @ (has changes) or @- (working copy empty)
Run jj show <rev> --summary and jj diff -r <rev> --stat for overview
Analyze changes:
- Small (≤5 files, ≤200 lines): run jj diff -r <rev> directly
- Large: use /jj-context to group changes by purpose
Propose functional groups (implementation+tests together, config separate, migrations separate)
Ask user for approval via AskUserQuestion

Execute splits with one-line descriptions:

jj split -r <rev> -m "<description>" file1 file2

Describe the last group (no split needed):
```
jj describe -r @- -m "<description>"
```

IMPORTANT: Always use single-line commit messages. Never use multi-line descriptions or bullet points.

Common Groupings

Core feature + its tests together
Configuration/infrastructure separate
Database migrations separate
Refactoring/cleanup separate
API changes vs UI changes

Example

# Split auth files into new commit
jj split -r @- -m "src/auth: add user authentication" src/auth.py test/test_auth.py

# Split API files
jj split -r @- -m "services/api: add rate limiting" src/api/rate_limit.py test/test_rate_limit.py

# Describe the remaining migration
jj describe -r @- -m "db/migrations: add users table"

Note: After each split, revision ID changes. Use @- for subsequent splits.

Install skill

Copy and run in your terminal

npx -y skills add https://github.com/majiayu000/claude-skill-registry-data --skill jj-split-jbott-nix-config

View on GitHub

data/jj-split-jbott-nix-config/SKILL.md

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