Agentjj

agentjj - Agent-First Version Control

An agent-oriented porcelain for Jujutsu (jj) version control. Designed to make AI agents love version control.

Zero-install: agentjj embeds jj-lib directly - no separate jj installation required.

Git-compatible: Automatically colocates with existing git repos. Git continues to work normally.

Quick Start

# In any git repo - agentjj auto-initializes jj colocated
agentjj orient                  # Get complete repo orientation

# Optional: create agent manifest for permissions/invariants
agentjj init                    # Create .agent/manifest.toml

Core Philosophy

1. Everything is JSON - Use --json for machine-parseable output
2. Self-documenting - agentjj schema shows all output formats
3. Safe by default - Checkpoints and undo for easy recovery
4. Batch-friendly - Bulk operations for efficiency
5. Context-rich - Get exactly what you need without bloat

Essential Commands

Orient (Start Here)

agentjj orient                  # Complete repo briefing
agentjj --json orient           # As structured JSON

Returns: current state, codebase stats, recent changes, capabilities, quick start guide.

Status & Discovery

agentjj status                  # Current change, operation, files
agentjj suggest                 # What should I do next?
agentjj validate                # Are my changes ready to push?

Reading Code

agentjj read src/main.rs                    # Read file
agentjj symbol src/api.py                   # List all symbols
agentjj symbol src/api.py::process          # Get specific symbol
agentjj context src/api.py::process         # Minimal context to use symbol
agentjj affected src/api.py::process        # Impact analysis

Bulk Operations (10x Efficiency)

agentjj bulk read src/a.rs src/b.rs src/c.rs
agentjj bulk symbols "src/**/*.rs"
agentjj bulk symbols "src/**/*.rs" --public-only
agentjj bulk context src/a.rs::foo src/b.rs::bar

Files & Structure

agentjj files                               # List all files
agentjj files --pattern "src/**/*.rs"       # Filter by pattern
agentjj files --pattern "*.py" --symbols    # Include symbol counts

Checkpoints & Recovery

agentjj checkpoint before-refactor          # Create checkpoint
agentjj checkpoint wip -d "work in progress"
agentjj undo                                # Undo last operation
agentjj undo --steps 3                      # Undo 3 operations
agentjj undo --to before-refactor           # Restore to named checkpoint
agentjj undo --dry-run                      # Preview what would be undone

Committing Changes

agentjj commit -m "feat: add auth endpoint"                     # Basic commit
agentjj commit -m "fix: null check" --type behavioral           # Typed commit
agentjj commit -m "refactor: extract parser" --type refactor    # Refactor type

Types: behavioral, refactor, schema, docs, deps, config, test

Changes & Diffs

agentjj diff                                # Show current diff
agentjj diff --against @                    # Working copy changes
agentjj diff --explain                      # With semantic summary
agentjj diff --against @--                  # Compare to 2 changes ago

Typed Changes

agentjj change set -i "Add auth" -t behavioral -c feature
agentjj change list
agentjj change show <change_id>

Types: behavioral, refactor, schema, docs, deps, config, test Categories: feature, fix, perf, security, breaking, deprecation, chore

Apply & Push

agentjj apply \
  --intent "Fix null check" \
  --type behavioral \
  --category fix \
  --patch fix.patch

agentjj push                               # Push to remote
agentjj push --pr --title "Fix bug"        # Create PR

Self-Documentation

agentjj schema                             # List all output schemas
agentjj schema --type context              # Show specific schema
agentjj schema --type orient               # See orient output format
agentjj skill                              # Full skill documentation
agentjj quickstart                         # Concise getting-started guide

JSON Mode

Always use --json for programmatic access:

agentjj --json status
agentjj --json orient
agentjj --json context src/main.rs::main
agentjj --json bulk read file1.rs file2.rs
agentjj --json affected src/api.rs::handler

Errors also return JSON:

{"error": true, "message": "Symbol path must be path/to/file::symbol_name"}

Exit codes: 0 = success, 1 = error

Workflow Example

# 1. Orient yourself
agentjj orient

# 2. Create a checkpoint before making changes
agentjj checkpoint before-auth-refactor

# 3. Make code changes, then review
agentjj status                              # See what changed
agentjj diff                                # Review the diff

# 4. Commit
agentjj commit -m "feat: add OAuth login support"

# 5. Create another checkpoint, continue working
agentjj checkpoint after-auth

# 6. Push when ready
agentjj push --branch main

Command Reference

All commands support --json for structured output.

Supported Languages

Symbol extraction: Python, Rust, JavaScript, TypeScript

Pro Tips

1. Start with orient - It tells you everything about the repo
2. Use --json always - Reliable parsing, never breaks
3. Checkpoint before risky changes - Easy recovery
4. Use bulk for efficiency - One call, many results
5. Check affected before changing - Know the blast radius
6. suggest when stuck - Let the tool guide you
7. validate before pushing - Catch issues early
8. skill for full docs - The binary is the documentation
9. quickstart for onboarding - 6 steps to productivity

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