cc.dev

Turn good code into
great code 20x faster

Command Center is the fastest code-review and refactoring agent that lets any engineer turn good code into great code 20x faster. If AIs can write code 100× faster, why aren't teams shipping 100× faster?

$npx @command-center/command-center@latest

Join Discord

Expand Demo

See the Refactor Agent in action

Works with Claude Code, Codex, and more. Your setup, nothing to migrate.

src/main/java/.../MaxFreeAllocator.java

-12 lines+8 lines1 method extracted

BEFORE

1 @Override

2 public TempBlockMeta allocateBlock(long userId, long blockId) {

3 ...

4 long maxFreeBytes = blockSize;

6 for (StorageDir dir : tier.getStorageDirs()) {

7 if (dir.getAvailableBytes() > maxFreeBytes) {

8 maxFreeBytes = dir.getAvailableBytes();

9 candidateDir = dir;

10 }

11 }

12 ...

18 // ... similar logic repeated ...

19 for (StorageDir dir : tier.getStorageDirs()) {

20 if (dir.getAvailableBytes() > maxFreeBytes) {

21 ...

22 }

23 }

x2 DUPLICATED

AFTER

1 @Override

2 public TempBlockMeta allocateBlock(long userId, long blockId) {

3 ...

7 candidateDir = getCandidateDirInTier(tier, blockSize);

··· continued in same file ···

New Methodsame file, line 98

98private StorageDir getCandidateDirInTier(StorageDirTier tier) {

99 StorageDir candidateDir = null;

100  long maxFreeBytes = blockSize - 1;
101  for (StorageDir dir : tier.getStorageDirs()) {
102    if (dir.getAvailableBytes() > maxFreeBytes) {
103      maxFreeBytes = dir.getAvailableBytes();
104      candidateDir = dir;
105    }
106  }

107 return candidateDir;

108}

Scroll back up to replay

Don't just code. Understand.

Stop the guesswork when reviewing AI-generated changes. Get full context in seconds.

Shipping Blindly

Relying on "luck" when merging massive AI-generated PRs.

✓

Done! I just edited 50 files

Build with Context

Every edit explained. Every change justified. Human understanding, AI speed.

Automatic code walkthroughs for every PR

Contextual explanation of architectural changes

Interactive terminal UI that devs actually love

Zero configuration — works with any framework

$npx @command-center/command-center@latest

Join Discord

Make AI code quality code

Refactor Agent Powered by 60 years of software design research.

The Agent uses the same material used to train 350+ engineers at Google, Meta, Stripe, Apple, Microsoft + more

See Examples

See the difference

Drag the slider to refactor the code.

legacy_module.ts

// REFACTORED (CLEAN)

export const processUserData = async (users: User[]) => {
  return users
    .filter(isValidUser)
    .map(transformUser)
    .reduce((acc, user) => acc + user.score, 0);
};

// Helper functions extracted for clarity
const isValidUser = (u) => u.isActive && u.hasPermission;
const transformUser = (u) => ({ ...u, score: calculateScore(u) });

// LEGACY (MESSY)

export const processUserData = async (users: User[]) => {
  let totalScore = 0;
  for (let i = 0; i < users.length; i++) {
    const user = users[i];
    if (user.isActive) {
      if (user.hasPermission) {
        // Complex logic nested deep...
        let score = 0;
        if (user.type === 'admin') {
          score = user.base * 2;
        } else {
          score = user.base;
        }
        // Side effects...
        console.log('Processing', user.id);
        totalScore += score;
      }
    }
  }
  return totalScore;
};