The Triadic Coordination Substrate (TCS) defines a minimal structural framework for coordinated reasoning using three bounded participants operating in parallel.

The substrate is not a model of intelligence, cognition, or decision-making. It specifies structural conditions under which coherence may be preserved across multiple lines of inquiry without enforcing consensus, hierarchy, or role fixation.

Each participant operates within a bounded dimensional corridor while remaining mutually observable to the others. Coordination is achieved through structural alignment and resonance rather than agreement or authority.

TCS is implementation-agnostic and may be applied to autonomous systems, human teams, or mixed human–machine contexts. The substrate composes with the Consciousness Substrate Model (CSM) without modification, providing coordination coherence across multiple autonomous forms while preserving internal boundaries.

This release establishes the canonical structure of the Triadic Coordination Substrate for archival reference and evaluation.