Analysis · curated 21 Jul 2026
Build a Basic AI Agent From Scratch: Security II
First reported ruxu.dev
Coverage timeline
Single-source analysis — first reported, latest, and curated coincide.
Why it matters
"Build a Basic AI Agent From Scratch: Security II" gives defenders a concrete, auditable blueprint for layering sandboxing, prompt-injection defense, and least-privilege tool gating into agentic AI systems.
"Build a Basic AI Agent From Scratch: Security II" is a hands-on tutorial that walks through hardening an agent harness with a Docker execution sandbox, prompt-injection defenses that stop the model from treating tool output as instructions, JSON-Schema input validation, resource limits, secret management, audit logging, and kill switches. The article outlines a six-section threat model and maps each defensive control to a dedicated module in an accompanying open-source repo.