v10.4.3

Four truths an agent reads got sharper. A share recorded twice is one
share, a feature map that points at source without the feature is a lie,
and a stale corpus snapshot makes both worse.

• extension_shares dedupes localOnly by artifactId and counts distinct
  shares in its hint; the append-only record file is untouched and
  localRecord reports entries beside shares so both readings stay
  available.
• add_feature stops pointing options and devtools at a template that
  carries neither surface, returning the full plan with an honest note
  instead of a wrong reference; the vue, svelte and preact sidebar rows
  point at their real in-framework files. A guard test now validates
  every mapping against the bundled snapshot.
• The offline template snapshot moves from the July 16 corpus to the
  current nightly: 52 templates, the renamed sidebar-monorepo-turborepo,
  sane surface data.
• @extension.dev/urls moves from 0.3.0 to the published 0.6.0, ending
  the last published-versus-checkout divergence the provenance guard
  tracked.