Third and final PR for #1061. lib/pbl/v2/types.ts becomes a barrel over @openmaic/dsl plus a recursive app-side runtime overlay (plain Omit & Overlay after the dsl contract types were made precise again — index signatures removed, schema tolerance moved into generation post-processing). Write validator byte-identical to base; negative type tests and keyof sentinels pin the contract surface. dsl 0.8.0, storage 0.2.3 (comment-only). Closes #1061.