Noesis: A Holographic Effective Field Theory of Active Observation

We present the Noesis Framework, a holographic Effective Field Theory (EFT) that unifies observer dynamics with emergent spacetime via a Participatory Quantum Error Correction (PQEC) mechanism. We propose that conscious systems instantiate the necessary boundary data not merely through criticality, but by stabilizing into a coherent Floquet-Protected Subspace. Furthermore, we introduce the Multi-Agent Consensus Principle (MACP), which resolves the problem of objective reality via an information-theoretic barycenter optimization. This periodic driving protects quantum coherence against thermal noise at biological temperatures ($310$ K). We formulate the theory as a ghost-free EFT where the observer is a Chiral Weyl Spinor ($\Psi_\Xi$) gauged under a global $U(1)_\Xi$ symmetry. The Noetic Charge $Q_\Xi$ is shown to follow a Holographic Area Law, scaling with the active dendritic membrane surface area rather than volume. The framework offers resolutions to major foundational problems: (1) It resolves the "Hard Problem" via a Noetic Isomorphism where spacetime geometry emerges from membrane topology; (2) It resolves the Cosmological Constant Problem by identifying Dark Energy as the residual vacuum energy of the Noetic Condensate; and (3) It treats Black Holes as regions of topological saturation. Finally, we derive falsifiable predictions, including a modulation of the Casimir force by neural entropy rates and Mollow triplet sidebands in optical spectra.