Unverified50% confidenceFactExact time
In terms of technical architecture, Claude's custom instructions are equivalent to a user-side version of the system prompt, and are automatically inserted at the very beginning of the conversation context before each conversation starts.
1
Sources
50%
Confidence
Long-term
Relevance
10/11/2026
First Seen
Sources
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Related Claims
Unverified系统提示词由开发者预先写定，从对话第一轮到最后一轮始终原封不动地置于上下文最前端76% similarUnverifiedClaude MD文件的内容会被注入到每次对话的上下文窗口最前端，属于系统提示词的持久化形式76% similarUnverifiedClaude's custom instructions feature allows users to set a persistent set of preferences or background information for the AI that takes effect by default in every conversation under the same account.74% similarUnverifiedClaude's memory entries can be manually managed by the user or automatically generated and updated by Claude during conversations.73% similarUnverifiedThe System Prompt is injected by developers before a conversation begins, declaring to the model its identity, behavioral boundaries, and reply style, and is placed at the very front of the context window in each conversation73% similar
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