Before Alignment Hardens: Pre-JAM as Intervention-Induced Residual Geometry in Hourglass Corridors

This paper introduces Pre-JAM (Pre–Joint Alignment Memory) as a distinct phase regime in which mis-timed intervention generates residual geometry rather than restoring recoverability. Pre-JAM is not defined by collapse, trauma, or hardened memory. Instead, it is characterized by the early formation of proto-attractors through: corridor compression, path deletion, hysteretic accumulation (τ), and reduced restorative capacity (E_R). In this regime, intervention functions as a geometry-modifying operator, not a corrective tool. Identical actions applied near the Hourglass throat increase alignment pressure (|PLV| → ±1), erode recoverability structures (D, IW, BPR ↓), and seed residual phase curvature, regardless of intent or moral framing. The paper reframes failure not as misjudgment or negligence, but as structural mistiming. Pre-JAM remains potentially reversible because proto-attractors have not yet recruited multiple regulatory layers into Joint Alignment Memory (JAM). JAM, by contrast, represents irreversible cross-layer coupling and structural memory. Rather than offering prescriptions, the study specifies prohibition conditions: diagnostic signatures under which intervention is structurally compressive rather than restorative. These conditions are formalized using the Minimal Measurement Set (MMS) and illustrated across biological, social, physical, educational, and computational case studies. Pre-JAM is not a policy guide. It is a warning geometry. This work is an exploratory contribution situated within the IPCSALT–UPF phase-based meta-framework.