system prompts

Every Qurtoo article on system prompts, newest first.

Techniques
GPT-5.6 Pays You to Delete Your System Prompt: State Every Rule Once and Stop Repeating Yourself
OpenAI's own tests show trimming duplicated instructions raises scores 10-15% while cutting tokens up to 66%. Your old scaffolding is now a tax.
Brian GagneJuly 20, 2026
Techniques
What Leaked System Prompts From GPT-5.4, Claude 4.6, and Gemini 3.1 Teach You About Writing Your Own
The biggest AI labs just showed us their playbook. Here's how to steal their system prompt patterns for your own workflows
Brian GagneApril 13, 2026
Development
The System Prompt Architecture for Coding Agents: What Claude Code and Cursor Get Right
Reverse-engineering the prompt patterns behind production coding agents
Brian GagneMarch 28, 2026

GPT-5.6 Pays You to Delete Your System Prompt: State Every Rule Once and Stop Repeating Yourself