Mikhail Shilkov • 10/1/2025

Claude Code 2.0 System Prompt Changes

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This article analyzes the specific changes between Claude Code 1.x and 2.0's system prompts, which power Anthropic's coding assistant. It details how rigid rules were softened into guidelines, certain sections were removed as behaviors were baked into the Sonnet 4.5 model, and the overall prompt became less hand-holding, reflecting increased trust in the AI's judgment for software engineering tasks.

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#ai coding #Claude Code #Anthropic
Claude Code 2.0 System Prompt Changes

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