Want the full 46-page handbook? Promptfoo for QA: The Complete Engineer's Handbook (2026 Edition) by Himanshu Agarwal covers everything below in production depth — runnable code in every chapter, RAG/agent/red-team playbooks, and a full capstone repo.
Get it here: https://himanshuai.gumroad.com/l/Promptfoo-for-QA-The-2026-Engineers-Handbook






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