Open-Source Attest Framework Replays Agent Calls in CI with Zero Model Costs

The open-source Attest framework (Apache-2.0) records every model call an Agent makes and replays them in CI, enabling tests with zero real model calls and zero cost; version 1.1 adds incident replay gating and mutation testing showing output-only tests caught 0 of 29 faults.

2026-11-15 ~ 2026-11-15 · 2 related posts

• Attest 1.1: replay-based agent testing gates, mutants expose 0/29 catch rate for output-only tests — tom_mathews · 2026-11-15
• Attest: record agent runs once, replay in CI with zero model calls — tom_mathews · 2026-11-15