sync: re-link a local plugin when it was removed from the profile even if its hash is unchanged

lib/sync.mjs

@@ -285,6 +285,13 @@ export function allowed(name, { allow = [], deny = [] } = {}) {
   return true
 }
 
+/** True when the profile still lists `name` as a bundle linked to `dir` (survives manual edits). */
+export function isLinked(name, dir) {
+  const pkg = readJson(path.join(profileDir(), 'package.json'))
+  if (!pkg || !dir || !fs.existsSync(dir)) return false
+  return pkg.dependencies?.[name] === `link:${dir}` && (pkg.dsh?.profile?.bundles || []).includes(name)
+}
+
 /** Link-spec install of a local plugin dir into the profile (package.json + bundles list). */
 export function linkLocalBundle(name, dir) {
   const prof = profileDir()