Why We Switched
We had been using Copilot for about a year and it was fine for autocomplete. But we kept hitting a ceiling - it could finish a line of code, but it could not reason about architecture, debug across files, or handle multi-step refactors.
When Claude Code launched with terminal-native workflows and deep codebase understanding, we gave it a two-week trial. That trial ended on day three when we realized we were never going back.
What Actually Changed
The biggest shift was not code generation speed - it was decision-making speed. Here is what our workflow looks like now:
Pull request turnaround dropped 40%. Not because the code writes itself, but because Claude Code handles the tedious parts - writing tests, updating types across files, generating migration scripts - so engineers spend their time on design decisions instead of boilerplate.
Code reviews got faster. We use Claude Code to do a first pass on PRs before a human reviews them. It catches type mismatches, missing error handling, and inconsistencies with existing patterns. Human reviewers can focus on architecture and business logic.
Onboarding accelerated. New engineers use Claude Code to explore unfamiliar parts of the codebase. Instead of interrupting a senior engineer to ask "how does the auth middleware work?", they ask Claude Code and get an answer grounded in the actual code.
The Setup
Our setup is straightforward:
- Every engineer runs Claude Code in their terminal alongside their editor
- We use CLAUDE.md files in each repo to give Claude Code project-specific context - coding standards, architecture decisions, deployment patterns
- MCP servers connect Claude Code to our GitHub, Linear, and internal docs
The CLAUDE.md files were the key insight. Without them, Claude Code is a smart generalist. With them, it becomes a teammate who knows your codebase.
Where It Falls Short
We are not pretending this is perfect. A few honest limitations:
- Large refactors still need human orchestration. Claude Code can execute a refactor plan brilliantly, but someone needs to define the plan and break it into the right chunks.
- It occasionally hallucinates API signatures for less popular libraries. We always verify against docs for anything outside the mainstream.
- Context window limits matter on very large monorepos. We have had to structure our work to keep relevant files within reach.
The Bottom Line
Claude Code did not replace any engineers on our team. It made every engineer meaningfully more productive. If you are a small team trying to punch above your weight - and that describes most of our clients - this is the highest-leverage tool you can adopt right now. We wrote more about how small teams ship enterprise-grade products in Small Team, Big Architecture.