system prompt

A system prompt is a system-level instruction that sets an AI model’s role and behavioral rules.

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A system prompt is a system-level instruction that sets a language model’s role, behavioral rules and constraints. Unlike a user prompt for a particular request, it establishes baseline behavior and generally takes precedence over user instructions. It can specify tool-use rules or response formats for chatbots and AI agents.

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Anthropic says it cut more than 80% of the Claude Code system prompt, the standing instructions the model reads before every task, with no measurable drop on co…

A system prompt, the standing instructions given to a model, is the wrong place to enforce this.

A persistent system prompt—a standing instruction applied across a conversation—may still contain phrases such as “think carefully before answering.” In tests d…

Anthropic has streamlined portions of its default system prompts and released a plugin evaluation suite to test whether custom tools and skills help or constrai…


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