Bearing capacity (IS 6403 / Terzaghi-Vesic), settlement (IS 8009 / Schmertmann), piles — bored, driven (Hiley), group, lateral (Reese p-y), downdrag, well foundation (IS 2911 / IRC 45), liquefaction (Boulanger-Idriss / NCEER), seismic site class (IS 1893), automated equivalent-linear (SHAKE-type) site response with a G/Gmax–damping curve library, soil AND rock slope stability (Bishop · Spencer · Morgenstern-Price, plus Wyllie & Mah planar / wedge / toppling), seepage and FE seepage (including transient unsaturated Richards / van Genuchten flow), retaining / braced / sheet / secant / contiguous-pile / MSE / soil-nail walls, ground improvement (stone columns, vibro, deep mixing), pavements (IRC 37 · IRC 58 · AASHTO 93), tunnel convergence-confinement (Hoek), collapsible soils (ASTM D5333), and full in-situ interpretation — CPT (Robertson), flat dilatometer DMT (Marchetti / TC16) and Ménard pressuremeter (NF P94-261). The pavement family includes a time-stepping Pavement-ME / MEPDG performance predictor (month-by-month rutting, fatigue, thermal cracking, IRI and design reliability), the Burmister multilayer-elastic solver, a finite-element plate-on-Winkler slab, a two-dimensional elasto-plastic footing bearing-capacity BVP (Mohr-Coulomb + Hardening-Soil stiffness, Prandtl/Vesić cross-checked) and strength-reduction slope solvers. Code-checked to IS, Eurocode 7, NF P94-261, BS, AASHTO, ASTM and IRC. Results identify the method and available reference context, and every module is covered by the golden test suite; 203 cited suites document published-value benchmarks or formula-fidelity checks, with dedicated external-value coverage still being extended engine by engine. The whole suite has also survived a 16-agent adversarial stress-test for invalid and boundary inputs (5,199+ engine tests).