Engineering guides and deep dives on Harness - short how-tos and long-form breakdowns.
On the one adversarial task its line-36 rule existed to prevent, a 129-instruction CLAUDE.md returned the same one-word reply as a harness with no instructions at all.
A minimal Claude Code harness fits in ten files - a lean CLAUDE.md skeleton, a verifiable definition-of-done loop, three read-only subagents, a pre-ship security audit, and credential deny rules. One npx command installs the set.
Google's 2026 SDLC whitepaper draws the line between vibe coding and agentic engineering at verification, not AI use - and the harness around the model decides which side you're on.