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#software testing Open access

dfeen87/DS-EV-Battery-Enhancement-Software: V8 BEDROCK

Oct 2026 · Zenodo (CERN European Organization for Nuclear Research)

Abstract

DS-EV v8.0.0 — BEDROCK Invariant-Driven Hardening • Deterministic Trust • Atomic State Integrity • AILEE Trust Contract 9.4 DS-EV v8.0.0 BEDROCK is a major engineering hardening release focused not on replacing the existing DS-EV architecture, but on strengthening the guarantees underneath it. Previous DS-EV releases established the broader system from the top down: battery-state mathematics, BMS middleware, torque and regenerative-energy management, vehicle integration surfaces, and AILEE-based trust governance. BEDROCK approaches that same architecture from the opposite direction. The v8.0.0 pass begins with the smallest meaningful behaviors, identifies the invariants they must preserve, tests those assumptions directly, and then works upward through the system. The architecture remains. The foundation underneath it is stronger. Core Numerical Hardening DS-EV configuration and state validation have been strengthened across the battery core. v8.0.0 now explicitly rejects non-finite and out-of-domain numerical values rather than allowing malformed state to propagate into higher-level calculations. Time deltas and sensor inputs receive deterministic validation, while numerical boundaries used throughout battery-state evolution are treated as explicit contracts rather than implicit assumptions. Energy-accounting logic was also refined to distinguish actual numerical inconsistencies from legitimate sensor-driven changes, reducing false classification while preserving meaningful residual checks. Atomic Candidate/Commit State Updates One of BEDROCK's most important changes is the introduction of stronger candidate/commit semantics within DSEnhancement and DSCoupling. State evolution now follows a clearer contract: Current State → Candidate State → Validate → Commit If candidate state fails validation, the update is rejected and the last-known-good state remains intact. This establishes a critical invariant across the DS core: A failed update must not partially mutate valid system state. The behavior is now explicitly exercised through regression testing. AILEE Trust Contract 9.4 BEDROCK strengthens the DS-EV ↔ AILEE boundary around an explicit AILEE Trust Contract 9.4 target. Trust evidence now carries stronger validity semantics through evidence_valid and evidence_count, with additional schema and domain validation applied to telemetry before trust evaluation. Malformed evidence fails closed. BMS and anomaly compartments reject malformed inputs before evaluation, while horsepower-governor and torque-management paths are more defensive against invalid numerical evidence. The governing principle is straightforward: Invalid evidence cannot silently become trusted authorization. This release documents the AILEE 9.4 trust-contract target and relevant provenance without claiming upstream binary or API conformance that has not been independently established. Deterministic Governor Boundary The deterministic C++ AILEE horsepower governor is now the dependency-free default. Python-embedded governor support remains available through the new: DS_ENABLE_PYTHON_GOVERNOR CMake option. This creates a cleaner operational boundary: core deterministic governance no longer depends on an embedded Python environment, while Python integration remains available when explicitly requested. Stronger Defensive Control Paths BEDROCK hardens several paths where validated information ultimately influences higher-level behavior. Improvements include: defensive handling of invalid numerical evidence stronger telemetry-domain validation malformed-input rejection before compartment evaluation deterministic exception behavior for invalid sensor inputs and time deltas preservation of last-known-good state following rejected updates strengthened trust evidence semantics improved torque and horsepower-governor defensive behavior These changes make previously implicit assumptions explicit and enforceable. CI Now Enforces the Tests v8.0.0 also strengthens the repository's continuous-integration contract. The CI pipeline now executes the meaningful test suite rather than relying primarily on successful compilation and smoke execution. CTest and Python unit tests are incorporated into the validation path, C++ assertions remain enabled for test targets even under Release builds, and CLI version behavior is explicitly checked. The release validation completed with: C++: 8/8 CTest targets passed Python: 14 tests passed Optional Python-extension test: 1 expected skip when pybind was not built Smoke integration: passed CLI version verification: DS-EV 8.0.0 This turns accumulated engineering assumptions into regression barriers that future releases must continue to satisfy. Installation and Integration Hardening Installer behavior has been strengthened around optional pybind artifacts, while update-source configuration and fallback URLs have been refreshed. Version metadata has also been synchronized across the project, including CMake, public C++ constants, documentation, update payload references, README material, and RAPS metadata. DS-EV now consistently identifies the current release as: v8.0.0 — BEDROCK Engineering Philosophy BEDROCK represents an evolution in how DS-EV is validated. The project has historically been developed through strong top-down systems reasoning: System → Architecture → Components → Implementation v8.0.0 adds the complementary direction: Invariant → Test → Implementation → Component → System Together: DESIGN DOWN. PROVE UP. The goal was not to make DS-EV larger. The goal was to identify what the architecture already depends upon, make those assumptions explicit, attack their boundaries, encode them as regression tests, and ensure future development cannot silently violate them. Scope and Safety Passing software tests does not establish that DS-EV is validated or certified for deployment on a physical vehicle. BEDROCK deliberately preserves the distinction between: Software Correctness → Simulation Validation → Integration Validation → Hardware Validation → Vehicle-Specific Validation → Real-World Safety Certification The v8.0.0 work strengthens the software foundation. Hardware-in-the-loop validation, OEM-specific integration, physical fault testing, and applicable vehicle safety validation remain separate requirements. v8.0.0 Summary DS-EV v8.0.0 BEDROCK delivers: stronger numerical and domain invariants atomic candidate/commit state evolution last-known-good state preservation deterministic invalid-input handling improved energy-accounting semantics hardened AILEE trust evidence fail-closed malformed-evidence behavior stronger BMS and anomaly compartment boundaries defensive torque and horsepower-governor paths dependency-free deterministic C++ governance by default optional Python governor integration improved installer resilience full CTest and Python test execution in CI Release-build test assertions synchronized v8.0.0 version metadata explicit AILEE Trust Contract 9.4 targeting expanded release and invariant documentation BEDROCK is not a new DS-EV architecture. It is the existing architecture with more of its assumptions transformed into explicit, testable, enforceable guarantees. Build the architecture from the vision. Prove the architecture from the foundation. DS-EV v8.0.0 — BEDROCK.

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