This field guide introduces Threat‑Informed Detection Engineering, a structured approach to building, validating, and deploying detection pipelines. It explains how intelligence and threat modeling serve as critical inputs, shifting detection creation from ad hoc methods to an engineering‑driven discipline. The guide emphasizes treating detections as code to improve reliability, consistency, and scalability, and it outlines how applying software development and DevOps principles enhances security operations. By aligning detection engineering with real adversary behavior, organizations can create more resilient, adaptable defenses.

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