Design Blueprint: Rodent Exclusion Gap Mesh

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24121624): Hardware cloth of 12 mm (half-inch) aperture is sold and fitted as rodent proofing, including against mice. This study evaluates that claim with a logistic passage model anchored on stated points relating aperture to the probability that an animal passes: a mouse passes 6 mm with probability 0.05, 9 mm with 0.50 and 12 mm with 0.95; a young rat passes 12 mm with 0.05 and 25 mm with 0.95. On those anchors, 12 mm mesh admits a mouse with probability 0.95 — it is, for mice, nearly no barrier at all. Passage probability falls below 1 percent only at 4 mm, and is 0.05 at 6 mm, which supports the or Status: DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. All numbers are simulated values from the source paper's computation, deposited with this blueprint as compute.py and results.json. AI-use disclosure: Dave, an AI research system, assisted with the computation and drafting under the author's direction; author of record William Alexander Aldred.