74849160b7
The cma authoring-form harness (experiments/2026-05-12-cross-model-authoring) is milestone-complete but its corpus went schema-dead: the implicit-cutover made param_modes/ret_mode mandatory, so today's ail check rejects 100% of the master examples + reference solutions and the renderer crashes on load. This spec revives the corpus to the current language and gets a mock run green. Scope (corpus-first, method-form-later per #68): minimal field-completion preserving existing modes; two new author-facing examples (loop/recur, new); spec.md section 4 rewritten to own/borrow with the borrow-over-value rule surfaced under the parse-gate; spec_completeness allowlists the non-authorable Term::Intrinsic out; mock fixture migrated so harness score assertions hold. No live IONOS call. Old specs 0017/0018 left intact as closed-milestone history.