RSIT Geometric Construction Package: Golden Spiral as Ruler and Generator of the Locked Marks (2 November 2026)

Working package, not a journal paper. Not a detection. Not a joint MCMC. Does not revise the locked core. Prior deposits are not replaced. The golden spiral construction (unit square of side 1, successive squares scaled by 1/φ, 1/φ², 1/φ³, …) is presented as the generative ruler of the locked geometric door. The sequence supplies both the measure and the demonstration: • w₀ = −φ/2 = −cos 36° ≈ −0.809 • wₐ = −1/φ = −2 sin 18° ≈ −0.618 • crossing at z = 1/√5 ≈ 0.447 where w = −1 The residual class A ≈ 0.040 (window [0.03, 0.05]) remains the beginning mark of unfinished first-moment coverage. After the start the house grows and stretches; the digit is not hunted later. Interface I recovers general relativity and the Standard Model when the residual gate is closed. Zero extra free parameters. No fourth door. Cover shows four stages of the construction (unit mark, φ-power squares, spiral + complex-plane hint, 36°/45° families with pentagon and golden triangle) plus micro-explainers. Second page is the dense connection statement linking the construction to the locked marks and to the selective-retention operator Retained = Select(Options | Conditions). Selected prior deposits (late September–October 2026) are named and linked; this package is its own deposit. Explainers and links are connections only. Assembly and algebra check: Grok (xAI), editor line only. Not a co-author claim.