https://blog.baifan.site/en/tags/system-prompt/Recent content in System Prompt on ByF (BaiFan) · Daily Deep ThinkHugo -- gohugo.ioenblog@baifan.site (ByF (BaiFan))blog@baifan.site (ByF (BaiFan))CC BY-NC 4.0Sat, 16 May 2026 09:00:00 +0800https://blog.baifan.site/en/claude-code-system-prompt-engineering/Sat, 16 May 2026 09:00:00 +0800blog@baifan.site (ByF (BaiFan))https://blog.baifan.site/en/claude-code-system-prompt-engineering/<!-- more --> <p>If you think a system prompt is just &ldquo;giving the AI a persona&rdquo;, Claude Code&rsquo;s system prompt will upend that notion.</p> <p>It isn&rsquo;t a few sentences. It&rsquo;s a <strong>thousand-line template engine</strong> made of multiple layers, each responsible for something different: identity definition, behavioral constraints, tool documentation, project context, memory injection, skill loading. Some layers are static (identical every time); others are dynamic (injected in real time based on the project, the session, user preferences).</p>