Git

If you have run two Claude Code sessions against the same repository at the same time, you already know the problem. One session rewrites a service file, the other reads a stale version of it, and you end up with broken logic split across an uncommitted diff that neither session produced intentionally. With 115,000 or more developers now using Claude Code and 195 million lines of code processed every week, this collision pattern has become one of the most reported friction points in agentic development workflows. Worktrees are the structural fix. Claude Code’s built-in worktree support gives each session its own isolated working directory backed by a single shared .git folder, so two agents can write simultaneously to a codebase without ever touching the same file state. ...

Aider is a free, open-source AI coding assistant that runs in your terminal, automatically commits every AI-generated edit to git, and supports 75+ model providers — including local models via Ollama and LM Studio. For developers who live in the command line, it’s the most practical AI pair programmer available in 2026. What Is Aider? Terminal-Native AI Pair Programming Aider is an open-source AI coding assistant built for developers who prefer the terminal over GUI editors. Unlike Cursor or GitHub Copilot, which integrate into visual IDEs, Aider operates entirely from the command line — you invoke it, describe what you want, and it reads your codebase, generates changes across multiple files, and commits every edit automatically with a meaningful git message. Released under the Apache 2.0 license, Aider has accumulated over 40,000 GitHub stars as of 2026, placing it among the most popular open-source AI developer tools globally. The tool supports 75+ model providers — OpenAI, Anthropic, Google Gemini, Mistral, and local models via Ollama or LM Studio — giving developers model freedom that vendor-locked tools cannot match. Aider earns a 4.2/5 overall rating in comprehensive 2026 reviews. Its core philosophy is simple: AI-assisted coding should feel like pair programming with a senior developer, not like babysitting an autocomplete engine. That philosophy, combined with its git-native design and multi-file context awareness, is why Aider has maintained a loyal following despite stiff competition from well-funded GUI alternatives. ...