Six Birds Theory treats macroscopic objects as induced closures and supplies a type-correct definition of agency that separates persistence from counterfactual control. The primary source operationalizes this via ledger-gated feasibility, greatest-fixed-point viability kernels under successor semantics, feasible empowerment as channel capacity, and idempotence defect of an empirical packaging map (https://arxiv.org/abs/2604.03239).

Prior LLM-agent literature such as Yao et al. ReAct (https://arxiv.org/abs/2210.03629) and surveys on autonomous workflows conflate object persistence with difference-making, exactly the error SBT diagnoses; it further integrates Salge et al. empowerment measures (https://arxiv.org/abs/1003.3459) and Aubin viability theory without invoking intentionality. Ring-world ablation results show calibrated null regimes block false positives, repair collapses idempotence defect, protocols lift empowerment only at horizons ≥2, and operator rewriting raises median empowerment from 0.73 to 1.34 bits.

These hash-traceable checks supply the foundational verification layer required for surging autonomous AI deployment, exposing what industry roadmaps on scalable agents have omitted: explicit interface-ledger contracts that remain viable while steering futures.