SDK-first (legacy alias)

redirect mandatory

Renamed to `reuse-first` per `policies-RFC-001-reuse-first-hierarchy.md`. This stub keeps existing references resolving while the sweep updates callers. New refs should target `policies/reuse-first.kmd`.

This policy was renamed to reuse-first. Same decision tree, same pre-Write protocol, same promotion pipeline — wider name, plus a Category column in the canonical pattern table and a sub-policy directory under policies/reuse/ for the categorical rules (versioning discipline, a11y baseline, build-time determinism, wire compatibility, …) that used to live implicitly.

See meta/docs/stack/rfcs/policies-RFC-001-reuse-first-hierarchy.md for the rationale and migration plan.

For new code and new references, use policies/reuse-first.kmd directly. This file is scheduled for removal after two release cycles (target: 2026-08), once the reference sweep (RFC §5 Phase 3) has updated all in-tree callers.