Retiring and Reopening Public Mint Windows: A Local Study of Dynamic Drop Pricing and Expiry

An NFT collection with a changing issue price must synchronize that price with any external public-mint interface. NguStageExperiment explores replacing the current SeaDrop public window by first retiring its old price window and then opening a delayed replacement with new metadata. This report inspects the experimental source and evaluates it using six existing fork-test scenarios adapted to a local SeaDrop behavioral mock, plus two new boundary tests. All eight local tests passed. The examples cover first-mint synchronization, repeated price changes, stale payment rejection, direct purchase and redemption, donations, and unchanged-price behavior. Two boundaries are explicit: an expired window is not renewed when the calculated price is unchanged, and a rejected synchronization call rolls back a donation that triggered it. A local round identifier and metadata UUID do not create a new SeaDrop public-stage index. Production marketplace acceptance, indexing, deployed bytecode compatibility and social benefits remain unverified. The study separates locally observed synchronization behavior from the larger claim that a public marketplace reliably presents a changing price. Preparation of this report was assisted by Codex. The research programme is directed toward human agency, financial inclusion, and evidence-based accountability. Intended social benefits are distinguished from measured technical results in the manuscript. The manuscript and newly authored analysis are offered under CC BY 4.0. Any supplied source files retain the license terms stated in the supplement; the record license does not replace third-party source licenses.