How to Code Claude Code in 200 Lines of Code

4 months ago

AI coding assistants simplify coding by interpreting user requests and generating functional code.
The core functionality of these tools can be built with about 200 lines of Python.
A coding agent operates as a conversation with an LLM that has access to tools like reading, listing, and editing files.
Key tools include reading file contents, listing directory contents, and editing files by replacing text.
The system dynamically generates tool descriptions from function signatures and docstrings for the LLM to use.
The agent loop involves the LLM deciding which tools to call, executing them, and returning results.
Production agents may include additional capabilities like grep, bash, and web search.
The example provided uses Claude's API but can be adapted for any LLM provider.
The architecture is simple: LLM decides actions, code executes them, and results are fed back.

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