AI Execution Safety Literature vs. the Arcstone Invariant Substrate: Downstream Actuation Mechanics, Tier Mapping, and Citation-Tree Synthesis

Document Reference: ARC-LIT-003Companion Specifications: ARC-SPEC-AGENT-HCE-001 (10.5281/zenodo.23076445) & ARC-ANL-INJ-002 (10.5281/zenodo.23076559)Governing Framework: Invariant Taxonomy (Physical, Digital, Legacy)Primary Target: Downstream Actuation Mechanics (DAM) & SynthesisTarget Master Anchor: A-77-DELTA-SHIELD-LOCKED (10.5281/zenodo.22665852) This synthesis maps 2024–2026 AI execution safety literature against the Arcstone Invariant Substrate. We define Downstream Actuation Mechanics (DAM), map external peer architectures (CaMeL, LATTICE, IETF Execution Finality, ZTPM, ActPlane) to the Invariant Taxonomy, identify Arcstone's unique bare-metal execution bounds (S_max ≤ 4096 B, τ_override ≤ 11.99 ms), detail the citation-tree synthesis connecting the master suite, and explain the epistemic origin of Errata ARC-ERR-2026-001. Key Contributions:- Downstream Actuation Mechanics (DAM): Operationalizes the runtime execution layer sitting between proposal generation and physical or digital state mutation.- Cross-Literature Mapping: Categorizes external peer architectures (DeepMind CaMeL, LATTICE, IETF Finality, ActPlane, ZTPM, NASA RTA) strictly across Physical, Digital, and Legacy tiers.- Bare-Metal Execution Bounds: Highlights Arcstone's microsecond yield clamp (τ_override ≤ 11.99 ms), static memory ceiling (S_max ≤ 4096 B), and constant-time semilattice join (O(1)).- Citation-Tree & Errata Synthesis: Explains how automated cold-start graph auditing identified POSIX exit collisions and symbol overloads, leading to ARC-ERR-2026-001.