Aider — AI Pair Programming in Terminal

Introduction

Aider brings AI coding assistance directly to your terminal, integrating with your editor and git workflow. It's ideal for developers preferring command-line work and wanting git-aware AI suggestions. This guide covers setup and usage.

Installation
Quick Start
Key Features
Configuration
Core Workflow
Git Integration
Best Use Cases
Advanced Features
Tips for Success
Comparison to GUI Tools
Practical Workflow
Limitations
When Aider Shines
Conclusion
FAQ

Installation

pip install aider-chat
aider --help

Quick Start

# Start with your project
aider

# In chat:
# "Add error handling to api.py"
# "Write tests for this function"
# "Refactor for performance"

Key Features

Git integration: Changes automatically committed
Terminal native: Works in any shell
Multiple files: Edit across entire projects
Model flexibility: Use GPT-4, Claude, local models
Free and open-source: MIT licensed

Configuration

~/.aider.conf.yml

model: claude-3-5-sonnet
api-key: sk-ant-...

Core Workflow

aider [files]

# Interactive chat:
# Enter prompts naturally
# Aider modifies files
# Changes shown in diff
# Commit changes to git

Git Integration

Aider automatically:

Creates commits for changes
Shows diffs before applying
Allows reviewing changes
Integrates with your workflow

Best Use Cases

Terminal developers: Natural workflow
SSH remote work: Works over SSH
Git-centric: Leverages version control
Minimal overhead: No IDE setup needed
Scripting: Automation friendly

Advanced Features

Multi-file refactoring: Reference multiple files in prompts

Git history: Aider understands your project evolution

Undo changes: Use git to revert aider modifications

Cost-effective: Only pay for tokens used

Tips for Success

Describe changes clearly
Reference specific files
Let Aider make mistakes—git handles undo
Use for focused tasks (single feature)
Review changes before committing

Comparison to GUI Tools

Feature	Aider	Copilot	Cursor
Terminal	Yes	No	No
Git-aware	Yes	Limited	Limited
Free option	Yes	No	Trial
Learning curve	Low	Low	Medium

Practical Workflow

# Start with feature branch
git checkout -b feature/auth

# Open aider
aider src/auth.py src/tests/test_auth.py

# Chat naturally:
# "Add JWT authentication"
# "Write tests for endpoints"
# "Add error handling"

# Review diffs, commit, merge

Limitations

Terminal-only (some prefer GUI)
Less code context than Cursor
Single-model at a time
Newer, smaller community

When Aider Shines

Terminal-first developers
SSH remote sessions
Git-heavy workflows
Simple focused features
Cost-conscious teams

Conclusion

Aider fills a unique niche for terminal developers wanting AI assistance without leaving their environment. Its git integration and cost-effectiveness make it excellent for agile development. For developers comfortable in terminal, Aider is highly recommended.

FAQ

Q: Does Aider work over SSH? A: Yes, works perfectly over remote connections—major advantage over GUI tools.

Q: Can I undo Aider's changes? A: Yes, use git revert or reset. Aider commits every change.

Q: Is Aider free? A: Tool is free/open-source. Costs depend on API provider (OpenAI, Anthropic, etc.).