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llm-mechanics

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Ayushman125 / react-agent-from-first-principles

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Pure Python implementation of a ReAct agent loop, vector routing, memory tracking, and cost analytics from first principles. Mirrors a 6-page "AI by Hand" worksheet with handwritten scans, programmatically verifying sequential reasoning tokens, tool matching via explicit cosine similarity, and context explosion costs without frameworks.

first-principles cosine-similarity pure-python causal-inference react-agent ai-by-hand llm-mechanics agent-loop
  • Updated Jun 9, 2026
  • Python

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