Canonical Glossary of the TAGC–LQG–RG Programme: 2026 Revision

This document establishes the canonical vocabulary, hierarchical level map, and sectoral recalibration of the TAGC–LQG–RG research programme following the three sequential architectural decisions of May 2026: (i) κc = 2.04 ± 0.05 is fixed as a fundamental structural constant of the programme (HC2), not derivable from prior structure (decision of 2026-05-14); (ii) κc is reinterpreted as a universal informational admissibility condition inverting the logical direction of earlier presentations (decision of 2026-05-15); (iii) κc is read as a gradual critical onset rather than as an instantaneous switch, opening a transitional liminal regime LT between the unitary substrate L1 and the coarse-grained anchored sector L2 (decision of 2026-05-19, internal architectural audit). The hard core HC1–HC5 is restated in consolidated form, with HC4 explicitly read as effective-local in L2 (Markovian GKSL), effective non-Markovian in LT, and effectively unitary at the substrate level in L1; the hierarchy Anchoring → Accessibility is established as part of the hard-core architecture, with A[Ψ] identified as an emergent observable. An operational dictionary of the programme’s canonical magnitudes is provided, together with a prohibited-expressions table and a sectoral recalibration table covering all predictions affected by the unified normalisation. This document is not a derivation, not a summary of predictions, and not a re-statement of phenomenology: it is the canonical semantic reference under which all subsequent publications of the programme operate. The companion consolidation paper executes the architectural integration of these decisions; the present glossary is its authoritative semantic framework.