Design Blueprint: Cockroach Gel Dot Grid

Design blueprint derived from the source paper (DOI 10.5281/zenodo.24121580): Gel bait is applied as small dots near harbourages, and tubes are sold with little guidance on how far apart the dots may sit. This study models 20 m of kitchen harbourage line, a mean nightly foraging distance that gives each dot 1.1 m of effective coverage, a starting population of 400 German cockroaches, and a nightly population projection including reproduction and secondary transfer through faeces and remains. At 1.1 m spacing, 19 dots using 1.9 g of gel costing USD 0.89 bring the population below 10 percent of its starting size in 21 days. At 1.6 m spacing the same point takes 38 days; a 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.