Thoughts on Claude Code - Slava Akhmechet

The post argues that Claude Code is most useful as a programming partner for medium-complexity work. It helped with refactors, design choices, and parser tasks, but still got stuck on a few harder edge cases. The author says it made coding faster and more enjoyable without replacing the need to understand the problem.

Reading notes

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• The author built Beep during winter break and wrote most of it with Claude Code/Opus 4.5.
• For lexical scoping and shadowing, Claude suggested changing the interpreter to return the current frame along with the value, which removed the need for explicit state tracking.
• For dynamic scoping, Claude suggested adding a set to each lexical binding frame so the interpreter can track which dynamic variables were introduced there.
• Claude was especially strong on parser work, including adding new syntax and fixing keyword parsing issues in ts-parsec.
• The author says Claude did not make the codebase well-structured on its own, but it was very effective at obscure parser tasks and type-system-heavy code.
• Claude got stuck on newline sensitivity in the grammar because the underlying parser library lacked support for keeping newlines.
• Claude also failed to resolve an npm publishing issue for a scoped package, which the author eventually fixed by reading the docs.
• The author argues that AI lowers the cost of refactors, brainstorming, and annoying maintenance work, and that this made the project better than it would have been otherwise.
• He concludes that Claude Code is a strong companion for problems at about a good undergraduate level, even though it still has clear limits.