This paper presents the ψ-Pavilion as a fully developed architectural state grounded in the principle of retention without intervention. The pavilion is not conceived as a cultural object, an educational facility, or an experiential installation. Instead, it operates as a spatial proof of non-violation: a public environment capable of maintaining coherence, accessibility, and institutional admissibility without extracting data, guiding behaviour, producing metrics, or inducing transformation. Within the ψ-Architecture Research Series, the ψ-Pavilion formalises the conditions under which a public space can remain open and ethically neutral while refusing all forms of optimisation — cognitive, emotional, behavioural, sensory, pedagogical, or therapeutic. Retentive structures such as Ξ-nodes, the Δψ-Field, and ψ-LUX illumination create a mode of architectural presence that does not escalate stimulation or impose narrative meaning. The framework introduces formal mathematical boundaries for architectural non-interference, including the Logacheva Drift Limit (M < 0. 6), the Retentive Differential Condition d|Δψ|/dt 0, and the Ξ-Stability Integral ⏨ Δψ ds = 0. These constraints demonstrate that stability can be produced through structural retention rather than behavioural influence. The ψ-Pavilion rejects pedagogical, curatorial, and experiential functions. It is non-directive, non-adaptive, and leaves no trace on the visitor. Its architectural classification is terminal rather than scalable: any attempt to replicate or expand it transforms its nature and nullifies its ψ-status. This work establishes the ψ-Pavilion as the first fully articulated example of retentive, non-violative public architecture — a space defined not by action, but by non-action; not by stimulation, but by structural quietness; not by intervention, but by the persistence of form itself.
Logacheva Yulia (Tue,) studied this question.