Expired60% confidenceFactExact time
Claude Code's system prompts are hardcoded by Anthropic and define the model's identity, tone, coding standards, and safety rules; developers cannot directly modify this layer.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Deep Dive into How Claude Code Works: Prompt Assembly, Permission Control, and the Skills Mechanism
bilibili63号炼金工坊5/28/2026
Related Claims
UnverifiedClaude Code's source code contains a "Stealth Mode" that intentionally makes generated code variable names rough and removes comments, in order to prevent AI-generated code from contaminating training data.73% similarUnverifiedClaude Code can understand developer intent through natural language, automatically construct request bodies that conform to API specifications, and eliminate the hassle of manually writing JSON payloads and handling authentication processes.73% similar
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