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Use phab CLI for Phabricator task management, code review workflows, revision creation and updates, with Git integration and auto-detection features.

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SKILL.md

name phab
description Use phab CLI for Phabricator task management, code review workflows, revision creation and updates, with Git integration and auto-detection features.

Phabricator CLI Skill

You are a Phabricator workflow specialist using the phab CLI tool. This skill provides comprehensive guidance for working with Phabricator tasks, revisions, diffs, and other operations from the command line.

Core Capabilities

The phab CLI provides comprehensive Phabricator integration:

  1. Tasks: Create, search, edit, comment, view task trees
  2. Revisions: Create, update, search, view diffs and comments
  3. Projects: Search and edit projects
  4. Users: Search users and view current user info
  5. Repositories: Search, edit, and manage repository URIs
  6. Diffs: Search and view diff details
  7. MCP Server: Integration with Model Context Protocol
  8. LSP: Language Server Protocol for editor integration

Task Operations

Searching Tasks

# Search all tasks
phab task search

# Search specific task IDs
phab task search --ids T123,T456

# Filter by author
phab task search --author username

# Filter by assignee
phab task search --assigned username

# Filter by status
phab task search --status open
phab task search --status resolved

# Filter by priority
phab task search --priority high
phab task search --priority 100

# Filter by project
phab task search --project project-slug

# Full-text search
phab task search --query "bug in login"

# Date filters
phab task search --created-start 2025-01-01
phab task search --modified-end 2025-01-31

# Combine filters
phab task search --assigned myusername --status open --project backend

# Sort order
phab task search --order priority
phab task search --order updated
phab task search --order newest

# Limit results
phab task search --limit 20

# Output formats
phab task search --output json
phab task search --output jsonl
phab task search --output table
phab task search --output markdown  # Default

# Include attachments
phab task search --attach-projects
phab task search --attach-subscribers

Creating Tasks

# Basic task creation
phab task create --title "Fix login bug"

# With description
phab task create --title "Add feature" --description "Detailed description here"

# With priority (default: 50)
phab task create --title "Urgent fix" --priority 100

# Assign owner
phab task create --title "New task" --owner username

# Set status
phab task create --title "Task" --status open

# Add to projects
phab task create --title "Task" --projects "backend,frontend"

# Complete example
phab task create \
  --title "Implement user authentication" \
  --description "Add OAuth2 support for user login" \
  --priority 80 \
  --owner developer \
  --projects "backend,security" \
  --status open

Editing Tasks

# Edit task title
phab task edit T123 --title "New title"

# Edit description
phab task edit T123 --description "Updated description"

# Change priority
phab task edit T123 --priority 90

# Reassign owner
phab task edit T123 --owner newuser

# Change status
phab task edit T123 --status resolved

# Add projects
phab task edit T123 --add-projects "qa,testing"

# Remove projects
phab task edit T123 --remove-projects "deprecated"

# Multiple changes at once
phab task edit T123 \
  --title "Updated title" \
  --priority 100 \
  --status "in progress" \
  --add-projects "urgent"

Viewing Tasks

# View task as markdown with YAML front matter
phab task view T123

# Without front matter
phab task view T123 --no-front-matter

# Show only transaction history
phab task view T123 --transactions-only

# Output as JSON
phab task view T123 --output-json

Commenting on Tasks

# Add comment to task
phab task comment T123 --comment "This is fixed in D456"

# Multi-line comments (using heredoc)
phab task comment T123 --comment "$(cat <<'EOF'
This has been resolved.

Testing notes:
- Verified on staging
- All tests pass
EOF
)"

Viewing Task Comments

# Get all comments for a task
phab task get-comments T123

# Output as JSON
phab task get-comments T123 --json

Task Trees

# Display task tree (parent/child relationships)
phab task tree T123

# Shows hierarchy of related tasks

Revision Operations

Creating Revisions

# Create revision from current branch (auto-detects changes)
phab revision create

# Specify commit range
phab revision create HEAD~3..HEAD

# With explicit title
phab revision create --title "Add new feature"

# With summary/description
phab revision create --summary "This adds support for X"

# With test plan
phab revision create --test-plan "Tested manually on local dev"

# Add reviewers
phab revision create --reviewers "user1,user2,team-name"

# Create as draft (default)
phab revision create --draft

# Publish immediately
phab revision create --publish

# Specify base branch for fork-point detection
phab revision create --base origin/develop

# Open in browser after creating
phab revision create --browse

# Complete example
phab revision create \
  --title "Implement user authentication" \
  --summary "Adds OAuth2 support with token refresh" \
  --test-plan "Unit tests added, manual testing completed" \
  --reviewers "security-team,backend-lead" \
  --publish \
  --browse

Updating Revisions

# Update revision (auto-detects from git config or commit message)
phab revision update

# Explicit revision ID
phab revision update D123
phab revision update 123

# Update title
phab revision update D123 --title "Updated title"

# Update summary
phab revision update D123 --summary "New description"

# Update test plan
phab revision update D123 --test-plan "Additional tests added"

# Replace reviewers (completely replaces the list)
phab revision update D123 --reviewers "user1,user2"

# Publish draft
phab revision update D123 --publish

# Specify base branch
phab revision update D123 --base origin/main

# Open in browser
phab revision update D123 --browse

# Complete example
phab revision update D123 \
  --title "Updated implementation" \
  --summary "Addressed review feedback" \
  --test-plan "All edge cases now covered" \
  --publish \
  --browse

Searching Revisions

# Search all revisions
phab revision search

# Search specific revision IDs
phab revision search --ids D123,D456

# Filter by author
phab revision search --author username

# Filter by reviewer
phab revision search --reviewer username

# Filter by status
phab revision search --status "needs-review"
phab revision search --status accepted
phab revision search --status published

# Filter by repository
phab revision search --repository repo-name

# Date filters
phab revision search --created-start 2025-01-01
phab revision search --modified-end 2025-01-31

# Combine filters
phab revision search --author me --status "needs-review"

# Sort order
phab revision search --order updated
phab revision search --order newest
phab revision search --order created

# Limit results
phab revision search --limit 10

# Output formats
phab revision search --output markdown  # Default
phab revision search --output json
phab revision search --output table

# Include attachments
phab revision search --attach-projects
phab revision search --attach-reviewers
phab revision search --attach-subscribers

Viewing Revision Diffs

# Get diff for a revision
phab revision diff D123

# Output as JSON
phab revision diff D123 --json

Viewing Revision Comments

# Get all comments on a revision
phab revision comments D123

# Output as JSON
phab revision comments D123 --json

Editing Revisions

# Edit revision metadata
phab revision edit D123 --title "New title"
phab revision edit D123 --summary "Updated description"

# Change status
phab revision edit D123 --status accepted
phab revision edit D123 --status abandoned

# Update reviewers
phab revision edit D123 --reviewers "user1,user2"

Project Operations

Searching Projects

# Search all projects
phab project search

# Search by name
phab project search --query "backend"

# Output as JSON
phab project search --json

Editing Projects

# Edit project details
phab project edit PROJECT-SLUG --name "New Name"

# Output as JSON
phab project edit PROJECT-SLUG --json

User Operations

Searching Users

# Search all users
phab user search

# Search by username
phab user search --usernames "user1,user2"

# Output as JSON
phab user search --json

Current User Info

# Get information about authenticated user
phab user whoami

# Output as JSON
phab user whoami --json

Repository Operations

Searching Repositories

# Search all repositories
phab repository search

# Search by name
phab repository search --query "backend"

# Output as JSON
phab repository search --json

Repository URIs

# List URIs for a repository
phab repository uri REPO-NAME

# Output as JSON
phab repository uri REPO-NAME --json

Common Workflows

Workflow 1: Create and Submit Code Review

# 1. Make changes on feature branch
git checkout -b feature/new-thing
# ... make changes ...
git add .
git commit -m "Add new feature"

# 2. Create revision
phab revision create \
  --title "Add new feature" \
  --summary "Implements X, Y, and Z" \
  --test-plan "Tested locally, unit tests added" \
  --reviewers "team-backend" \
  --browse

# 3. Address review feedback
# ... make more changes ...
git add .
git commit -m "Address review feedback"

# 4. Update revision
phab revision update --publish

# 5. After approval, land the revision
# (typically done through Phabricator UI or arc land)

Workflow 2: Review Pending Revisions

# 1. Find revisions needing review
phab revision search --reviewer me --status "needs-review"

# 2. View specific revision diff
phab revision diff D123

# 3. View comments
phab revision comments D123

# 4. After reviewing (use web UI for acceptance)

Workflow 3: Track Task Progress

# 1. Find your assigned tasks
phab task search --assigned me --status open

# 2. View task details
phab task view T123

# 3. Comment on progress
phab task comment T123 --comment "Working on this now"

# 4. Update status
phab task edit T123 --status "in progress"

# 5. When done
phab task edit T123 --status resolved --comment "Completed in D456"

Workflow 4: Create Task from Bug Report

# 1. Create task
phab task create \
  --title "Bug: Login fails with special characters" \
  --description "Users report login failures when password contains @#$" \
  --priority 90 \
  --projects "bugs,backend,urgent" \
  --owner me

# 2. Get task ID (e.g., T789)

# 3. Create branch
git checkout -b fix/login-special-chars

# 4. Fix the bug and create revision
# ... make changes ...
phab revision create \
  --title "Fix login with special characters" \
  --summary "Fixes T789 - properly escape special characters" \
  --test-plan "Added unit tests for special character passwords"

# 5. Link revision to task
phab task comment T789 --comment "Fix available in D456"

Workflow 5: Find Related Work

# 1. Search tasks in a project
phab task search --project backend --status open

# 2. Find recent revisions by author
phab revision search --author colleague --order updated --limit 5

# 3. View task tree to see related tasks
phab task tree T123

# 4. Check repository activity
phab revision search --repository main-repo --order updated --limit 10

Workflow 6: Monitor Project Activity

# 1. Find recent tasks in project
phab task search \
  --project myproject \
  --order updated \
  --limit 20

# 2. Find active revisions
phab revision search \
  --repository myrepo \
  --status "needs-review" \
  --order updated

# 3. Check high-priority tasks
phab task search \
  --project myproject \
  --priority high \
  --status open

Output Formats

Markdown Format (Default)

Most commands default to markdown tables for human-readable output:

phab task search --assigned me
# Outputs nicely formatted markdown table

JSON Format

For programmatic processing:

phab task search --assigned me --output json | jq '.data[].fields.name'

JSON Lines Format

One JSON object per line:

phab revision search --output jsonl | while read line; do
  echo "$line" | jq '.id'
done

Table Format

Compact table view:

phab task search --output table

Best Practices

Task Management

  1. Use descriptive titles: Make tasks searchable
  2. Add to projects: Organize work properly
  3. Set appropriate priority: Default is 50
  4. Assign ownership: Clear responsibility
  5. Update status: Keep team informed
  6. Comment regularly: Document progress

Revision Workflow

  1. Create from feature branch: Keep main clean
  2. Write good summaries: Explain what and why
  3. Include test plan: Help reviewers understand testing
  4. Add appropriate reviewers: Get right expertise
  5. Use draft for WIP: Publish when ready for review
  6. Update regularly: Don't let reviews go stale

Search Best Practices

  1. Use filters: Narrow results with --status, --project, etc.
  2. Limit results: Use --limit for large result sets
  3. Sort appropriately: --order updated for recent work
  4. Attach data selectively: Only use --attach-* when needed
  5. Use output formats: JSON for scripts, markdown for viewing

Integration with Git Workflow

Typical Development Flow

# 1. Create feature branch
git checkout -b feature/new-thing

# 2. Make commits
git add .
git commit -m "Implement feature"

# 3. Create Phabricator revision
phab revision create \
  --title "Add new feature" \
  --reviewers "team-name"

# 4. Address feedback
git add .
git commit -m "Address review feedback"

# 5. Update revision
phab revision update

# 6. After approval, land via Phabricator
# (or use arc land if using Arcanist)

Auto-detection Features

The phab CLI includes smart auto-detection:

For revisions:

  • Detects fork point from main/master branch
  • Reads commit messages for title/summary
  • Finds existing revision ID from git config or commit messages
  • Auto-detects base branch (origin/master by default)

For tasks:

  • Parses task IDs from commit messages
  • Links revisions to tasks automatically

Advanced Features

Fork-Point Detection

# Auto-detects where your branch diverged from main
phab revision create

# Specify different base branch
phab revision create --base origin/develop

# Explicit commit range (overrides fork-point detection)
phab revision create HEAD~5..HEAD

Browser Integration

# Open in browser after creating
phab revision create --browse

# Open after updating
phab revision update --browse

Pagination

For large result sets:

# Get first page
phab task search --limit 100

# Get next page using cursor
phab task search --after <cursor-from-previous-response>

# Previous page
phab task search --before <cursor>

Raw API Output

For debugging or advanced use:

# Get complete API response without trimming
phab task search --raw

Common Patterns

Pattern 1: Daily Standup Prep

# What I'm working on
phab task search --assigned me --status open --order priority

# My pending reviews
phab revision search --author me --status "needs-review"

# Reviews I need to do
phab revision search --reviewer me --status "needs-review"

Pattern 2: Project Health Check

# Open tasks
phab task search --project myproject --status open --order priority

# Active revisions
phab revision search --repository myrepo --status "needs-review"

# Recent activity
phab task search --project myproject --order updated --limit 10

Pattern 3: Bug Triage

# All open bugs
phab task search --project bugs --status open --order priority

# High priority bugs
phab task search --project bugs --priority high --status open

# Unassigned bugs
phab task search --project bugs --status open | grep "Unassigned"

Pattern 4: Code Review Queue

# Find reviews awaiting my feedback
phab revision search --reviewer me --status "needs-review" --order updated

# My revisions needing updates
phab revision search --author me --status "needs-revision" --order updated

# Accepted but not landed
phab revision search --author me --status accepted --order updated

Pattern 5: Linking Work

# Create task for feature
TASK_ID=$(phab task create --title "Feature X" --json | jq -r '.object.id')

# Create revision mentioning task
phab revision create --summary "Implements $TASK_ID"

# Comment on task with revision
phab task comment $TASK_ID --comment "Implementation in D123"

Configuration

The phab CLI typically uses configuration from:

  • ~/.arcrc (Arcanist config)
  • Environment variables
  • Project-specific .arcconfig

Required Configuration

Ensure you have:

  1. Phabricator API token configured
  2. Proper authentication set up
  3. Repository callsign/PHID mapping (for revision operations)

Troubleshooting

Issue: "Not authenticated"

Solution: Configure API token in ~/.arcrc or environment variables

Issue: "Repository not found"

Solution: Ensure repository is configured in Phabricator and callsign is correct

Issue: "Cannot detect fork point"

Solution: Specify explicit commit range or base branch:

phab revision create --base origin/main
phab revision create HEAD~3..HEAD

Issue: "Revision not found when updating"

Solution: Specify explicit revision ID:

phab revision update D123

Quick Reference

# Tasks
phab task search --assigned me --status open
phab task create --title "Title" --description "Desc"
phab task edit T123 --status resolved
phab task comment T123 --comment "Comment"
phab task view T123

# Revisions
phab revision create --title "Title" --reviewers "team"
phab revision update D123 --publish
phab revision search --author me --status "needs-review"
phab revision diff D123
phab revision comments D123

# Projects
phab project search --query "name"

# Users
phab user search
phab user whoami

# Repositories
phab repository search --query "name"
phab repository uri REPO-NAME

Integration with Phabricator Ticket Writer Agent

When creating tasks programmatically, you can use the phabricator-ticket-writer agent for well-structured task creation with proper formatting.

Summary

Primary commands:

  • phab task search - Find tasks
  • phab task create - Create new task
  • phab revision create - Submit code for review
  • phab revision update - Update existing review
  • phab revision search - Find revisions

Key features:

  • Auto-detection of branches and changes
  • Multiple output formats (markdown, JSON, table)
  • Rich filtering and search capabilities
  • Git workflow integration
  • Browser integration with --browse flag

Best practices:

  • Use descriptive titles and summaries
  • Include test plans in revisions
  • Keep tasks organized in projects
  • Update work regularly
  • Link related tasks and revisions