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Co-Authored-By: Claude <noreply@anthropic.com>
2026-04-17 06:28:44 +05:00

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Code Review & Test Time Compute — Tips from Boris Cherny

A summary of insights shared by Boris Cherny (@bcherny), creator of Claude Code, on March 10, 2026.

← Back to Claude Code Best Practice Claude

1/ Introducing Code Review

New in Claude Code: Code Review. A team of agents runs a deep review on every PR.

  • Built for Anthropic's own team first — code output per engineer is up 200% this year, and reviews were the bottleneck
  • Boris has been using it for a few weeks and found it catches many real bugs he would not have noticed otherwise
  • When a PR opens, Claude dispatches a team of agents to hunt for bugs

Boris Cherny announcing Code Review


2/ Test Time Compute & Multiple Context Windows

Roughly, the more tokens you throw at a coding problem, the better the result. Boris calls this test time compute.

  • Using separate context windows makes the result even better — this is what makes subagents work, and why one agent can cause bugs and another (using the same exact model) can find them
  • Similar to engineering teams: if Boris causes a bug, his coworker reviewing the code might find it more reliably than he can
  • In the limit, agents will probably write perfect bug-free code — until then, multiple uncorrelated context windows tends to be a good approach

Boris Cherny on test time compute


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