HarnessTax

Everything Fervor AI has published that touches HarnessTax — 2 pieces, newest first.

• HarnessTax Says Your Coding Agent Harness Costs 2x for 2 Points, and the Bill Starts on the First Call

  Harness choice is a cost decision that has been sold as a feature decision, and HarnessTax shows the cheapest place to measure it is the size of the very first model…

• Briefing · September 17, 2026 · morning

  The layer between the model and the task, the harness and the handoff artifacts it writes, is where this week's cost and risk numbers landed, from a doubled bill for the…