README: window unknown states, what configuration changes do to the learned model, inputs_changed tolerances, coefficient confidence, model_changes, and Model Error vs Forecast Error. docs/MODEL.md: configuration-change table, confidence semantics, both validation modes. CHANGELOG gains an Unreleased section (version unchanged); AUDIT and ROADMAP record findings, evidence and remaining risks. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>