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Writing and refactoring code with AI

For writing and refactoring code with AI, choose an agent that matches how you work: Claude Code for terminal-driven, whole-task changes; Cursor or GitHub Copilot for in-editor edits; Cline, Aider, or Continue for open-source, step-approved control. The best results come from clear instructions plus a success check — tests or type-checks — the agent can run to self-correct.

Claude Code, Cursor, GitHub Copilot, Cline, Aider, and Continue.

Curated by Joaquin FuentesLast updated: June 14, 2026

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Claude Code Beginner Tips & Tricks

The one-page desktop reference every new Claude Code user wants.

Twelve uniform tiles covering sessions, the closed-loop workflow, file handling, plugins, mid-flight steering, permission modes, agents, memory, and context health — each command and tip verified against the official docs.

Claude CodeFreeVibeVersityBeginner
getting-startedworkflowcommandsmemory
When to use & gotchas

When to use Keep it open while you learn the surface area — sessions, permission modes, memory, and the closed-loop workflow — until the muscle memory sticks.

Gotcha The single biggest beginner win is permission modes: start in plan mode (Shift+Tab) so the agent proposes before it edits, then approve.

Model Context Protocol — Reference Servers

Filesystem, Git, Fetch, Memory, and more, maintained by Anthropic.

The canonical reference implementations of MCP. Start here to understand the protocol and to wire up filesystem, git, and fetch access for any MCP-capable client.

Any toolFreeOfficialBeginner
mcpfilesystemgitreference
When to use & gotchas

When to use Start here before any third-party server — the filesystem and fetch references teach you how MCP wiring, scopes, and approvals actually behave.

Gotcha Give a server the narrowest filesystem scope that works. A broad root means the agent can read more of your machine than you intended.

Claude Code

Anthropic's agentic coding tool — terminal, IDE, and web.

The agent this whole hub is built around: a coding agent that reads your repo, runs commands, edits files, and ships. Included with Claude paid plans; also available via API.

Any toolFreemiumOfficialBeginner
agentcliide
When to use & gotchas

When to use Reach for it when you want an agent that owns a whole task end-to-end — read the repo, run the tests, fix, and open the PR — not just autocomplete.

Gotcha It's only as good as the loop you give it: a clear success check (a test or build it can run) is what lets it self-correct instead of guessing.

Cursor

The AI-native code editor (VS Code fork).

A full editor built around AI: multi-file edits, codebase chat, and agent mode. Free tier with usage limits; paid plans unlock higher limits and frontier models.

CursorFreemiumOfficialBeginner
editoragentautocomplete
When to use & gotchas

When to use Pick it if you want AI woven into the editor itself — inline edits, codebase chat, and agent mode — rather than a separate terminal tool.

GitHub Copilot

In-editor completions, chat, and agents across IDEs.

GitHub's assistant for VS Code, JetBrains, and more — completions, chat, and a coding agent. Free tier available; Pro and enterprise plans add capacity and model choice.

Any toolFreemiumOfficialBeginner
autocompletechatagent
When to use & gotchas

When to use A safe default if your team spans VS Code and JetBrains and you mainly want fast, in-line completions with chat on the side.

Cline

Open-source autonomous coding agent for VS Code.

A transparent, open-source agent extension: it plans, edits, and runs commands with your approval at each step, and works with the model provider of your choice.

Any toolFreeOpen sourceIntermediate
agentvscodeopen-source
When to use & gotchas

When to use Choose it when you want to watch every step and bring your own model/key — its approve-each-action flow makes the agent's reasoning visible.

Aider

AI pair programming in your terminal, git-native.

A command-line agent that edits your repo and makes a clean git commit per change. Model-agnostic and fully open source — a favorite for scriptable, reviewable workflows.

Any toolFreeOpen sourceIntermediate
cligitopen-source
When to use & gotchas

When to use Great when you value a clean git history — it makes one focused commit per change, so every AI edit is easy to review and revert.

Continue

Open-source, configurable assistant for VS Code & JetBrains.

An open-source autopilot you fully configure — bring your own models, rules, and context providers. Strong choice when you want control over what the assistant sees.

Any toolFreeOpen sourceIntermediate
autocompletechatopen-source
When to use & gotchas

When to use Reach for it when you need to govern exactly which models and context an assistant uses — useful for privacy-sensitive or self-hosted setups.

Frequently asked questions

What's the best AI tool for refactoring?

Any of the agentic tools handle refactors well; Claude Code and Aider make clean, reviewable commits, which matters most when a change spans many files.

Open-source or commercial?

Cline, Aider, and Continue are open source and model-agnostic. Claude Code, Cursor, and Copilot are commercial, each with a free way to try them first.

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