LandedSpec open construction-import data — 2026.07.19

First versioned public distribution of three LandedSpec buyer-side registers: aluminium profile tooling and finish acceptance, supplier document requirements, and FOB/CIF/DAP construction quote comparison. The authoritative HTML landing pages, source context, reuse terms, and professional-confirmation boundaries are linked from the README. LandedSpec-authored layers are CC BY 4.0; underlying source data remains subject to provider terms.