Write a coding agent from first principles: better tools
SMRTR summary
Upgrade a basic coding agent by swapping custom file tools for Anthropic's native text editor and bash tools, which models are specifically trained on for better, more consistent tool calls. The tutorial walks through implementing persistent bash sessions, file editing commands, CWD access restrictions, backup decorators, output truncation, and command approval logic — all in roughly 300 lines of Python.
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