Cline

Cline is an open-source coding agent that gives you real autonomy. It reads your entire project structure, makes coordinated edits across files, and runs terminal commands while monitoring linters and compilers. You can use it as a VS Code extension, JetBrains plugin, CLI tool, or even a Kanban board for parallel agents. The Plan mode asks clarifying questions; Act mode executes with diffs and approvals. Auto-approve toggle lets it run fully autonomously. Cline works with practically any LLM provider — Anthropic, OpenAI, Google, OpenRouter, local models via Ollama/LM Studio. The SDK lets you build custom plugins and multi-agent teams. When to pick this: when you want an agent that can edit multiple files, run bash commands, and handle complex tasks across your codebase. It's also great if you want to avoid vendor lock-in by choosing your own model. When to pass: if you prefer a managed service with no setup, or if you need a simple autocomplete tool. Running arbitrary bash commands can be a security risk in sensitive environments. Closest alternative: GitHub Copilot (commercial) — Cline is open-source, more flexible, but requires more setup and model cost management. Cline can be run locally with Ollama for free, but for advanced models you'll pay API costs. Real-world caveats: you need to supply your own API keys for cloud models. The Kanban board is still evolving; for complex multi-agent workflows, expect some rough edges. Also, because it's open-source, you're responsible for updates and security patches.