fix(packages): omit source publication payloads

scripts/publication-payload.ts

@@ -0,0 +1,27 @@
+/** Publication payload policy shared by static manifests and packed tarballs. */
+
+/** Normalize a package manifest path or npm tarball member to its payload-relative path. */
+function payloadPath(file: string): string {
+  const normalized = file.replaceAll('\\', '/').replace(/^\.\/+/, '').replace(/\/+$/, '')
+  return normalized.startsWith('package/') ? normalized.slice('package/'.length) : normalized
+}
+
+/** Whether a package payload path exposes source or declaration-map intermediates. */
+export function isForbiddenPublicationFile(file: string): boolean {
+  const normalized = payloadPath(file)
+  return normalized === 'src'
+    || normalized.startsWith('src/')
+    || normalized.endsWith('.d.ts.map')
+}
+
+/** Reject source and declaration-map members in a packed npm tarball. */
+export function validateTarballPayload(files: readonly string[], context: string): void {
+  for (const file of files) {
+    if (!isForbiddenPublicationFile(file)) continue
+    const normalized = payloadPath(file)
+    if (normalized === 'src' || normalized.startsWith('src/')) {
+      throw new Error(`${context} publishes source file ${file}`)
+    }
+    throw new Error(`${context} publishes declaration map ${file}`)
+  }
+}