💻 Professional guide

AI for developers

From autocomplete to agentic development: how to use Claude and Claude Code to review, test, document and delegate whole tasks — while you keep control of the architecture.

Where it actually saves time

Agentic development with Claude Code. The real productivity jump isn't autocompleting lines — it's delegating complete tasks: "implement this feature, add tests and run them until they pass". With Sonnet 5 and 1M context by default, Claude Code can reason over entire repositories.

Systematic code review. A tireless second pair of eyes that reviews every PR for bugs, security risks and performance issues before your human teammates — who save their time for the architectural questions.

Tests and documentation. The two eternally postponed tasks: generating test suites with edge cases in minutes, and keeping READMEs, docstrings and ADRs current as a natural part of the flow.

Debugging and legacy code. Pasting a stack trace plus the relevant context often cuts hours of searching. And for someone else's (or old) code, ask for a map of the flow before touching anything.

// Prompts

Prompts ready for your workflow

Claude Code

Full task with a plan first

Implement [FEATURE] in this repository. Before writing code: 1) Explore the structure and locate affected files 2) Propose a brief plan and wait for my OK Then: implement, add tests, run them and fix until they pass. Constraints: touch nothing outside the scope, follow the repo's existing conventions.
Review

Code review by severity

Act as a senior engineer doing code review. Analyze this diff and return, by severity: 1) Bugs and security risks (CRITICAL/HIGH/MEDIUM) 2) Performance issues with real impact 3) Readability only where it hurts maintainability For each finding: why it's a problem and the proposed fix. No style nitpicks — that's the linter's job. [PASTE THE DIFF]
Tests

Test suite with edge cases

Generate tests for this function/module using [FRAMEWORK]: - Happy paths: the 2-3 normal uses - Edge cases: empty, null, unexpected types, extreme values, concurrency if relevant - Error cases: what must fail and how Descriptive test names (given_when_then). If you spot ambiguous behavior in the code, list your questions before assuming anything. [PASTE THE CODE]
Legacy

Legacy code map

Don't modify anything yet. Analyze this code and give me: 1) What it does, in 3 sentences 2) Main flow: input → transformations → output 3) External dependencies and side effects 4) Risk zones: coupling, global state, undocumented assumptions 5) Where you'd start a safe refactor I'll then ask for changes step by step. [PASTE THE CODE]

Staying in control

You're the architect. AI executes well-defined tasks very well; architecture decisions, trade-offs and "that's not how we do it here" are yours. An approved plan before every big task prevents 90% of the drift.

Read the code you accept. Generated code you don't understand is instant technical debt. If you can't explain it in review, it shouldn't reach main.

Watch secrets and data. Never paste credentials, keys or production data into a prompt. Use environment variables, and on teams, plans with no-training guarantees (Team/Enterprise, API).

// FAQ

Frequently asked questions

Claude Code or the regular chat for programming?
For one-off questions and snippets, chat is plenty. For working on a real repository — multiple files, running tests, iterating until the suite passes — Claude Code is a different category: it operates directly in your terminal with whole-project context. Our Claude for free guide explains how to try it.
Which model should I use for coding?
Sonnet 5 is today's default balance for development (and Claude Code's default model). For very long agentic tasks or complex architectural reasoning, the higher-tier models perform better. Compare prices in our model table or answer 5 questions in the selector.
Will AI replace programmers?
The work shifts: less time writing mechanical code, more weight on design, review, product judgment and agent orchestration. Industry data shows smaller teams shipping more — the differential skill now is directing AI well, not out-typing it.

More resources: the best Claude Code repositories, the guide to building your own skills and the rest of the profession guides.