dfeen87/AILEE-Trust-Layer: V8.1 Brooks Calibration

Abstract

AILEE Trust Layer — V8.1 Release Note (Calibration + Hardened Brooks Domain Validation) Date: September 16, 2026 Author: Don Michael License: MIT Location: Warrington, PA Disclaimer: This release note describes independent exploratory work. It is not acknowledged, approved, or endorsed by Brooks Instrument and does not represent official Brooks Instrument software, product direction, or engineering commitments. Takeaway AILEE V8.1 introduces a tightly scoped, production‑ready Calibration Layer and a comprehensive Brooks domain hardening pass. Together, these improvements refine trust scoring, strengthen determinism, enforce fail‑closed behavior, and extend the Brooks V8 foundation without altering its core semantics. Overview AILEE V8.1 builds directly on the Brooks V8 release by adding: A structured, auditable calibration model for trust/confidence outputs A hardened Brooks domain evaluation pipeline Expanded fail‑closed validation across multiple Brooks measurement domains Strengthened telemetry schema enforcement Additional regression coverage for malformed or unsafe inputs This release remains intentionally narrow, stable, and aligned with existing architecture conventions. Key Enhancements Calibration Layer Introduces a deterministic calibration model that adjusts trust/confidence outputs using contextual thresholds, grace margins, uncertainty zones, and peer consensus signals. Calibration wraps existing V8 scoring logic without modifying its core behavior. Threshold Handling Adds explicit logic for minimum/maximum bounds, uncertainty bands, and calibrated fallback behavior. Thresholds now support deterministic fail‑safe paths when calibration metadata is missing or malformed. Consensus Integration Incorporates peer‑based agreement checks where supported by the repository's existing design. Consensus signals are now included in calibration metadata and logged deterministically. Fail‑Safe Behavior Ensures predictable fallback paths when calibration inputs are malformed, missing, non‑finite, or out of range. Calibration failures revert to V8's deterministic baseline. Deterministic Logging Extends metadata serialization for calibration events, threshold decisions, consensus checks, and fallback triggers when structured logging is already supported. Brooks Domain Hardening (New in V8.1) Telemetry Validation Fail‑closed handling for malformed or future telemetry timestamps Rejection of invalid heartbeat settings Enforcement of non‑negative, finite process values Validation of sampling intervals Invalid process targets now enter the pipeline through a safe zero target Measurement Domain Guards Added fail‑closed validation to: ramp zero‑drift pressure differential‑pressure gas‑transition Including rejection of: negative or non‑finite flow values unknown or unsupported source gases Fieldbus Serialization Hardening EtherNet/IP and EtherCAT serialization now reject invalid telemetry before encoding, preventing propagation of malformed or unsafe data. Regression Coverage Expanded regression tests to cover: invalid guard inputs malformed fieldbus data non‑finite telemetry values future timestamps safe fallback behavior across Brooks measurement domains Testing Improvements V8.1 includes comprehensive test coverage for: Normal calibration flows Threshold boundary conditions Uncertainty zone behavior Missing or malformed calibration metadata Fail‑safe fallback behavior Hardened Brooks domain validation Fieldbus serialization rejection paths Deterministic output consistency across runs All tests follow existing repository conventions and run cleanly under lint, type‑check, and formatting commands. Documentation New documentation explains: The calibration objective and design Interaction between calibration and Brooks V8 trust semantics API/configuration parameters Expected behavior under normal and degraded conditions Hardened Brooks domain validation rules Telemetry schema requirements Examples of calibrated vs. uncalibrated outputs Guidelines for future calibration tuning (V8.2+) Documentation is included in the PR and linked from the main README. Architecture Notes No broad refactors No changes to core V8 scoring logic Calibration is layered, not invasive Hardened validation follows existing domain conventions All behavior remains deterministic and auditable PR adheres to repository naming, structure, and commit conventions If infrastructure gaps exist, V8.1 provides a calibration foundation (interfaces, configuration, tests, documentation) without introducing incompatible behavior PR Summary Title: AILEE V8.1 — Calibration Layer, Trust Refinement, and Hardened Brooks Domain Validation Description: This PR introduces a calibration‑focused increment to the AILEE Trust Layer following the Brooks V8 release. It adds a deterministic calibration model, threshold logic, consensus integration, fail‑safe behavior, hardened Brooks domain validation, expanded telemetry schema enforcement, fieldbus serialization safeguards, regression coverage, and documentation. All V8 behavior is preserved. Future work includes calibration tuning and expanded consensus sources.