AI Tooling and Harness Engineering

Archive of posts about AI tooling, harness engineering, permission boundaries, and verification flow design.

Harness Engineering 10. From Documents to an Observable Harness

2026-04-19 5 minute read

A practical roadmap for moving from document-centered operations to an observable harness.

2026-04-18 5 minute read

Explains why agent systems become unstable when approval boundaries and guardrails are missing.

2026-04-17 5 minute read

Explains why results alone are not enough and why trace matters for operations, debugging, and evaluation.

2026-04-16 5 minute read

Explains how to turn natural-language principles into concrete system rules and enforcement.

2026-04-15 4 minute read

Explains why multi-agent setups are not the default answer and when a single agent is the better baseline.

2026-04-14 4 minute read

Explains why build and test alone are not enough to validate an agent and what extra checks are needed.

2026-04-13 6 minute read

Explains why handoffs should move from free-form prose to schema-based contracts and how to design them.

2026-04-12 6 minute read

Explores what a project instruction file should own and where it should stop inside a larger harness.

2026-04-11 6 minute read

Explains harness engineering as the design of the tools, permissions, and verification around AI.

2026-04-11 9 minute read

Explains why AI coding tools produce different results by looking beyond prompts to the execution environment.