Skill UI

Practical reference to validate and correct n8n expressions, covering {{ }} usage, $json/$node/$now/$env variables, webhook payload access, and common pitfalls so workflow authors write error-free automations.

SimPO (Simple Preference Optimization) is a state-of-the-art, reference-free method designed for aligning Large Language Models (LLMs) using human preference data. It is an efficient alternative to DPO and PPO, notably outperforming DPO without requiring a separate reference model. It is ideal for practitioners who need faster, simpler, and more resource-efficient fine-tuning for preference alignment.

Step-by-step reference for detecting and exploiting server-side template injection (SSTI), covering injection point discovery, template engine fingerprinting, and payloads for Jinja2/Twig/Freemarker so authorized penetration tests can reach remote code execution.