Kit-State Lifecycle: A Reversible Modal-to-Actual Bridge for Dynamical Energy Bookkeeping

The Kit-State Lifecycle (KSL) is presented as a reversible, bidirectional modal-to-actual bridge over one constrained dynamical inventory. The working paper distinguishes quantum-modal and classical-instantiated descriptions; formalizes typed QKBU (Quantum Kit Budget Units)/CKBU (Classical Kit Budget Units) bookkeeping; develops spectral eligibility, a context-indexed actualization register, finite-context Born-compatible bijections, event-level conservation requirements, and a selected-source constitutive-gravity ansatz; and studies a conditional four-form bridge-flux treatment of vacuum energy. The worked Born and Bell constructions are finite-context compatibility results that import the quantum joint measure; they are not yet a Lorentz-covariant causal bridge law. Selected-source gravity, the high-compression source map, the sequestered gap selector, the bridge-flux normalization, radiative protection, and parameter-frozen empirical discriminants remain open derivation and falsification gates. No claim of singularity resolution, ultraviolet completion, or a completed solution of the cosmological-constant problem is made. Version 1.8.1 corrects the reduced-Planck-mass exponent in the sequestered selector, context-indexes the actualization register, sharpens Bell/covariance and Bianchi-conservation boundaries, date-scopes the cited 2025 cosmology comparisons, externalizes all 50 references into a structured BibTeX database with bracketed numerical citations, and adds reproducible archival preflight, XMP, Unicode, font, checksum, and Zenodo metadata support.