Claude Code
  • is Anthropic’s AI-powered coding assistant designed to work directly from your terminal or command line

Internals of Claude Code LLM

LLMs can increase context window by:

  • chunking
  • indexing
  • iterating

Claude builds a mental index (not a full snapshot) of the code base by:

  • summarizing files
  • extract symbols (functions, classes, APIs)
  • keeps compressed representations instead of raw code
  • e.g. “There is a `UserService` that validates auth tokens and calls `BillingClient`”

Claude rereads the code file when needed

Claude Code is like “A very fast engineer who can only have 200k tokens open on their desk, but can walk back to the bookshelf unlimited times

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