feat: propagate Micropub deletes to ActivityPub and Bluesky

When a post is deleted from the web backend (Micropub action=delete),
call each registered syndicator's delete() method so the post is also
removed from the Fediverse (AP Delete/Tombstone) and Bluesky
(com.atproto.repo.deleteRecord).

- patch-bluesky-syndicator-delete: adds Bluesky#deletePost(bskyUrl) to
  lib/bluesky.js and BlueskySyndicator#delete(url, syndication) to
  index.js; the bsky.app URL is resolved from the syndication array
  that postData.delete() preserves in _deletedProperties
- patch-micropub-delete-propagation: patches action.js case "delete"
  to iterate publication.syndicationTargets after postContent.delete()
  and fire syndicator.delete() fire-and-forget for any syndicator that
  exposes the method (errors logged, never break the 200 response)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -5,8 +5,8 @@
   "main": "index.js",
   "scripts": {
     "preinstall": "node scripts/setup-gitea-url-rewrite.mjs",
-    "postinstall": "xattr -w com.apple.fileprovider.ignore#P 1 node_modules 2>/dev/null || true && node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-media-sharp-runtime.mjs && node scripts/patch-frontend-sharp-runtime.mjs && node scripts/patch-endpoint-files-upload-route.mjs && node scripts/patch-endpoint-files-upload-locales.mjs && node scripts/patch-endpoint-activitypub-locales.mjs && node scripts/patch-endpoint-homepage-locales.mjs && node scripts/patch-endpoint-homepage-identity-defaults.mjs && node scripts/patch-federation-unlisted-guards.mjs && node scripts/patch-endpoint-micropub-where-note-visibility.mjs && node scripts/patch-endpoint-podroll-opml-upload.mjs && node scripts/patch-frontend-serviceworker-file.mjs && node scripts/patch-endpoint-comments-locales.mjs && node scripts/patch-endpoint-posts-locales.mjs && node scripts/patch-endpoint-conversations-locales.mjs && node scripts/patch-conversations-collection-guards.mjs && node scripts/patch-indiekit-routes-rate-limits.mjs && node scripts/patch-indiekit-error-production-stack.mjs && node scripts/patch-indieauth-devmode-guard.mjs && node scripts/patch-listening-endpoint-runtime-guards.mjs && node scripts/patch-endpoint-github-changelog-categories.mjs && node scripts/patch-endpoint-github-contributions-log.mjs && node scripts/patch-store-github-error-message.mjs && node scripts/patch-store-github-update-fallback.mjs && node scripts/patch-store-github-gitea-methods.mjs && node scripts/patch-store-github-content-type.mjs && node scripts/patch-endpoint-blogroll-feeds-alias.mjs && node scripts/patch-endpoint-posts-uid-lookup.mjs && node scripts/patch-conversations-bluesky-self-filter.mjs && node scripts/patch-conversations-bluesky-cursor-fix.mjs && node scripts/patch-endpoint-micropub-source-filter.mjs && node scripts/patch-syndicate-force-checked-default.mjs && node scripts/patch-syndicate-normalize-syndication-array.mjs && node scripts/patch-endpoint-posts-fetch-diagnostic.mjs && node scripts/patch-micropub-fetch-internal-url.mjs && node scripts/patch-micropub-session-token.mjs && node scripts/patch-indiekit-endpoint-urls-protocol.mjs && node scripts/patch-webmention-sender-hentry-syntax.mjs && node scripts/patch-webmention-sender-retry.mjs && node scripts/patch-webmention-sender-livefetch.mjs && node scripts/patch-webmention-sender-empty-details.mjs && node scripts/patch-bluesky-syndicator-internal-url.mjs && node scripts/patch-bluesky-syndicator-media-type-guard.mjs && node scripts/patch-ap-skip-draft-syndication.mjs && node scripts/patch-ap-og-image.mjs && node scripts/patch-ap-webfinger-before-auth.mjs && node scripts/patch-ap-federation-bridge-base-url.mjs && node scripts/patch-ap-compose-default-checked.mjs && node scripts/patch-ap-mastodon-reply-threading.mjs && node scripts/patch-ap-mastodon-status-id.mjs && node scripts/patch-ap-interactions-send-guard.mjs && node scripts/patch-ap-syndicate-dedup.mjs && node scripts/patch-ap-mastodon-delete-fix.mjs && node scripts/patch-ap-status-reply-id.mjs && node scripts/patch-ap-inbox-publication-url.mjs && node scripts/patch-micropub-gitea-dispatch-conditional.mjs",
-    "serve": "export NODE_ENV=${NODE_ENV:-production} INDIEKIT_DEBUG=${INDIEKIT_DEBUG:-0} && node scripts/preflight-production-security.mjs && node scripts/preflight-mongo-connection.mjs && node scripts/preflight-activitypub-rsa-key.mjs && node scripts/preflight-activitypub-profile-urls.mjs && node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-media-sharp-runtime.mjs && node scripts/patch-frontend-sharp-runtime.mjs && node scripts/patch-endpoint-files-upload-route.mjs && node scripts/patch-endpoint-files-upload-locales.mjs && node scripts/patch-endpoint-activitypub-locales.mjs && node scripts/patch-endpoint-homepage-locales.mjs && node scripts/patch-endpoint-homepage-identity-defaults.mjs && node scripts/patch-federation-unlisted-guards.mjs && node scripts/patch-endpoint-micropub-where-note-visibility.mjs && node scripts/patch-endpoint-podroll-opml-upload.mjs && node scripts/patch-frontend-serviceworker-file.mjs && node scripts/patch-endpoint-comments-locales.mjs && node scripts/patch-endpoint-posts-locales.mjs && node scripts/patch-endpoint-conversations-locales.mjs && node scripts/patch-conversations-collection-guards.mjs && node scripts/patch-indiekit-routes-rate-limits.mjs && node scripts/patch-indiekit-error-production-stack.mjs && node scripts/patch-indieauth-devmode-guard.mjs && node scripts/patch-listening-endpoint-runtime-guards.mjs && node scripts/patch-endpoint-github-changelog-categories.mjs && node scripts/patch-endpoint-github-contributions-log.mjs && node scripts/patch-store-github-error-message.mjs && node scripts/patch-store-github-update-fallback.mjs && node scripts/patch-store-github-gitea-methods.mjs && node scripts/patch-store-github-content-type.mjs && node scripts/patch-microsub-reader-ap-dispatch.mjs && node scripts/patch-microsub-compose-draft-guard.mjs && node scripts/patch-endpoint-blogroll-feeds-alias.mjs && node scripts/patch-endpoint-posts-uid-lookup.mjs && node scripts/patch-conversations-bluesky-self-filter.mjs && node scripts/patch-conversations-bluesky-cursor-fix.mjs && node scripts/patch-endpoint-micropub-source-filter.mjs && node scripts/patch-syndicate-force-checked-default.mjs && node scripts/patch-syndicate-normalize-syndication-array.mjs && node scripts/patch-endpoint-posts-fetch-diagnostic.mjs && node scripts/patch-micropub-fetch-internal-url.mjs && node scripts/patch-micropub-session-token.mjs && node scripts/patch-indiekit-endpoint-urls-protocol.mjs && node scripts/patch-webmention-sender-hentry-syntax.mjs && node scripts/patch-webmention-sender-retry.mjs && node scripts/patch-webmention-sender-livefetch.mjs && node scripts/patch-webmention-sender-empty-details.mjs && node scripts/patch-bluesky-syndicator-internal-url.mjs && node scripts/patch-bluesky-syndicator-media-type-guard.mjs && node scripts/patch-ap-skip-draft-syndication.mjs && node scripts/patch-ap-og-image.mjs && node scripts/patch-ap-webfinger-before-auth.mjs && node scripts/patch-ap-federation-bridge-base-url.mjs && node scripts/patch-ap-compose-default-checked.mjs && node scripts/patch-ap-mastodon-reply-threading.mjs && node scripts/patch-ap-mastodon-status-id.mjs && node scripts/patch-ap-interactions-send-guard.mjs && node scripts/patch-ap-syndicate-dedup.mjs && node scripts/patch-ap-mastodon-delete-fix.mjs && node scripts/patch-ap-status-reply-id.mjs && node scripts/patch-ap-inbox-publication-url.mjs && node --require ./metrics-shim.cjs node_modules/@indiekit/indiekit/bin/cli.js serve --config indiekit.config.mjs",
+    "postinstall": "xattr -w com.apple.fileprovider.ignore#P 1 node_modules 2>/dev/null || true && node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-media-sharp-runtime.mjs && node scripts/patch-frontend-sharp-runtime.mjs && node scripts/patch-endpoint-files-upload-route.mjs && node scripts/patch-endpoint-files-upload-locales.mjs && node scripts/patch-endpoint-activitypub-locales.mjs && node scripts/patch-endpoint-homepage-locales.mjs && node scripts/patch-endpoint-homepage-identity-defaults.mjs && node scripts/patch-federation-unlisted-guards.mjs && node scripts/patch-endpoint-micropub-where-note-visibility.mjs && node scripts/patch-endpoint-podroll-opml-upload.mjs && node scripts/patch-frontend-serviceworker-file.mjs && node scripts/patch-endpoint-comments-locales.mjs && node scripts/patch-endpoint-posts-locales.mjs && node scripts/patch-endpoint-conversations-locales.mjs && node scripts/patch-conversations-collection-guards.mjs && node scripts/patch-indiekit-routes-rate-limits.mjs && node scripts/patch-indiekit-error-production-stack.mjs && node scripts/patch-indieauth-devmode-guard.mjs && node scripts/patch-listening-endpoint-runtime-guards.mjs && node scripts/patch-endpoint-github-changelog-categories.mjs && node scripts/patch-endpoint-github-contributions-log.mjs && node scripts/patch-store-github-error-message.mjs && node scripts/patch-store-github-update-fallback.mjs && node scripts/patch-store-github-gitea-methods.mjs && node scripts/patch-store-github-content-type.mjs && node scripts/patch-endpoint-blogroll-feeds-alias.mjs && node scripts/patch-endpoint-posts-uid-lookup.mjs && node scripts/patch-conversations-bluesky-self-filter.mjs && node scripts/patch-conversations-bluesky-cursor-fix.mjs && node scripts/patch-endpoint-micropub-source-filter.mjs && node scripts/patch-syndicate-force-checked-default.mjs && node scripts/patch-syndicate-normalize-syndication-array.mjs && node scripts/patch-endpoint-posts-fetch-diagnostic.mjs && node scripts/patch-micropub-fetch-internal-url.mjs && node scripts/patch-micropub-session-token.mjs && node scripts/patch-indiekit-endpoint-urls-protocol.mjs && node scripts/patch-webmention-sender-hentry-syntax.mjs && node scripts/patch-webmention-sender-retry.mjs && node scripts/patch-webmention-sender-livefetch.mjs && node scripts/patch-webmention-sender-empty-details.mjs && node scripts/patch-bluesky-syndicator-internal-url.mjs && node scripts/patch-bluesky-syndicator-media-type-guard.mjs && node scripts/patch-ap-skip-draft-syndication.mjs && node scripts/patch-ap-og-image.mjs && node scripts/patch-ap-webfinger-before-auth.mjs && node scripts/patch-ap-federation-bridge-base-url.mjs && node scripts/patch-ap-compose-default-checked.mjs && node scripts/patch-ap-mastodon-reply-threading.mjs && node scripts/patch-ap-mastodon-status-id.mjs && node scripts/patch-ap-interactions-send-guard.mjs && node scripts/patch-ap-syndicate-dedup.mjs && node scripts/patch-ap-mastodon-delete-fix.mjs && node scripts/patch-ap-status-reply-id.mjs && node scripts/patch-ap-inbox-publication-url.mjs && node scripts/patch-bluesky-syndicator-delete.mjs && node scripts/patch-micropub-delete-propagation.mjs && node scripts/patch-micropub-gitea-dispatch-conditional.mjs",
+    "serve": "export NODE_ENV=${NODE_ENV:-production} INDIEKIT_DEBUG=${INDIEKIT_DEBUG:-0} && node scripts/preflight-production-security.mjs && node scripts/preflight-mongo-connection.mjs && node scripts/preflight-activitypub-rsa-key.mjs && node scripts/preflight-activitypub-profile-urls.mjs && node scripts/patch-lightningcss.mjs && node scripts/patch-endpoint-media-scope.mjs && node scripts/patch-endpoint-media-sharp-runtime.mjs && node scripts/patch-frontend-sharp-runtime.mjs && node scripts/patch-endpoint-files-upload-route.mjs && node scripts/patch-endpoint-files-upload-locales.mjs && node scripts/patch-endpoint-activitypub-locales.mjs && node scripts/patch-endpoint-homepage-locales.mjs && node scripts/patch-endpoint-homepage-identity-defaults.mjs && node scripts/patch-federation-unlisted-guards.mjs && node scripts/patch-endpoint-micropub-where-note-visibility.mjs && node scripts/patch-endpoint-podroll-opml-upload.mjs && node scripts/patch-frontend-serviceworker-file.mjs && node scripts/patch-endpoint-comments-locales.mjs && node scripts/patch-endpoint-posts-locales.mjs && node scripts/patch-endpoint-conversations-locales.mjs && node scripts/patch-conversations-collection-guards.mjs && node scripts/patch-indiekit-routes-rate-limits.mjs && node scripts/patch-indiekit-error-production-stack.mjs && node scripts/patch-indieauth-devmode-guard.mjs && node scripts/patch-listening-endpoint-runtime-guards.mjs && node scripts/patch-endpoint-github-changelog-categories.mjs && node scripts/patch-endpoint-github-contributions-log.mjs && node scripts/patch-store-github-error-message.mjs && node scripts/patch-store-github-update-fallback.mjs && node scripts/patch-store-github-gitea-methods.mjs && node scripts/patch-store-github-content-type.mjs && node scripts/patch-microsub-reader-ap-dispatch.mjs && node scripts/patch-microsub-compose-draft-guard.mjs && node scripts/patch-endpoint-blogroll-feeds-alias.mjs && node scripts/patch-endpoint-posts-uid-lookup.mjs && node scripts/patch-conversations-bluesky-self-filter.mjs && node scripts/patch-conversations-bluesky-cursor-fix.mjs && node scripts/patch-endpoint-micropub-source-filter.mjs && node scripts/patch-syndicate-force-checked-default.mjs && node scripts/patch-syndicate-normalize-syndication-array.mjs && node scripts/patch-endpoint-posts-fetch-diagnostic.mjs && node scripts/patch-micropub-fetch-internal-url.mjs && node scripts/patch-micropub-session-token.mjs && node scripts/patch-indiekit-endpoint-urls-protocol.mjs && node scripts/patch-webmention-sender-hentry-syntax.mjs && node scripts/patch-webmention-sender-retry.mjs && node scripts/patch-webmention-sender-livefetch.mjs && node scripts/patch-webmention-sender-empty-details.mjs && node scripts/patch-bluesky-syndicator-internal-url.mjs && node scripts/patch-bluesky-syndicator-media-type-guard.mjs && node scripts/patch-ap-skip-draft-syndication.mjs && node scripts/patch-ap-og-image.mjs && node scripts/patch-ap-webfinger-before-auth.mjs && node scripts/patch-ap-federation-bridge-base-url.mjs && node scripts/patch-ap-compose-default-checked.mjs && node scripts/patch-ap-mastodon-reply-threading.mjs && node scripts/patch-ap-mastodon-status-id.mjs && node scripts/patch-ap-interactions-send-guard.mjs && node scripts/patch-ap-syndicate-dedup.mjs && node scripts/patch-ap-mastodon-delete-fix.mjs && node scripts/patch-ap-status-reply-id.mjs && node scripts/patch-ap-inbox-publication-url.mjs && node scripts/patch-bluesky-syndicator-delete.mjs && node scripts/patch-micropub-delete-propagation.mjs && node --require ./metrics-shim.cjs node_modules/@indiekit/indiekit/bin/cli.js serve --config indiekit.config.mjs",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],

scripts/patch-bluesky-syndicator-delete.mjs

@@ -0,0 +1,165 @@
+/**
+ * Patch: add delete() support to the Bluesky syndicator.
+ *
+ * When a Micropub delete fires, Indiekit should be able to call
+ * syndicator.delete(url, syndication) to remove the corresponding post from
+ * Bluesky.  This syndicator currently has no delete() method at all.
+ *
+ * Fix A (bluesky.js):
+ *   Add Bluesky#deletePost(bskyUrl) — resolves the AT-URI from the bsky.app
+ *   profile URL (using the existing getPostParts helper) and calls
+ *   com.atproto.repo.deleteRecord to permanently delete the record.
+ *
+ * Fix B (index.js):
+ *   Add BlueskySyndicator#delete(url, syndication) — finds the bsky.app URL
+ *   in the syndication array passed by the Micropub delete action and delegates
+ *   to Bluesky#deletePost().
+ */
+
+import { access, readFile, writeFile } from "node:fs/promises";
+
+const MARKER = "// [patch] bluesky-syndicator-delete";
+
+// ── Fix A: bluesky.js — add deletePost() method ───────────────────────────────
+
+const blueskyClassCandidates = [
+  "node_modules/@rmdes/indiekit-syndicator-bluesky/lib/bluesky.js",
+];
+
+const OLD_POST_REPOST = `  async postRepost(postUrl) {
+    const client = await this.#client();
+    const post = await this.getPost(postUrl);
+    const repost = await client.repost(post.uri, post.cid);
+    return uriToPostUrl(this.profileUrl, repost.uri);
+  }
+
+  /**
+   * Post a quote post`;
+
+const NEW_POST_REPOST = `  async postRepost(postUrl) {
+    const client = await this.#client();
+    const post = await this.getPost(postUrl);
+    const repost = await client.repost(post.uri, post.cid);
+    return uriToPostUrl(this.profileUrl, repost.uri);
+  }
+
+  /**
+   * Delete a Bluesky post by its bsky.app profile URL. ${MARKER}
+   * @param {string} bskyUrl - bsky.app post URL (e.g. https://bsky.app/profile/handle/post/rkey)
+   * @returns {Promise<void>}
+   */
+  async deletePost(bskyUrl) { ${MARKER}
+    const client = await this.#client();
+    const postParts = getPostParts(bskyUrl);
+    await client.com.atproto.repo.deleteRecord({
+      repo: postParts.did,
+      collection: "app.bsky.feed.post",
+      rkey: postParts.rkey,
+    });
+  }
+
+  /**
+   * Post a quote post`;
+
+// ── Fix B: index.js — add delete() method to BlueskySyndicator ───────────────
+
+const indexCandidates = [
+  "node_modules/@rmdes/indiekit-syndicator-bluesky/index.js",
+];
+
+const OLD_SYNDICATE_END = `    } catch (error) {
+      throw new IndiekitError(error.message, {
+        cause: error,
+        plugin: this.name,
+        status: error.statusCode,
+      });
+    }
+  }
+
+  init(Indiekit) {`;
+
+const NEW_SYNDICATE_END = `    } catch (error) {
+      throw new IndiekitError(error.message, {
+        cause: error,
+        plugin: this.name,
+        status: error.statusCode,
+      });
+    }
+  }
+
+  /**
+   * Delete a previously syndicated post from Bluesky. ${MARKER}
+   * @param {string} url - Original blog post URL (unused, for API parity)
+   * @param {string[]} [syndication=[]] - Array of syndication URLs from the deleted post
+   * @returns {Promise<void>}
+   */
+  async delete(url, syndication = []) { ${MARKER}
+    try {
+      const bskyUrl = syndication.find((s) => s.includes("bsky.app"));
+      if (!bskyUrl) {
+        console.warn(\`[Bluesky] No Bluesky URL found in syndication for \${url} — skipping delete\`);
+        return;
+      }
+      const bluesky = new Bluesky({
+        identifier: this.options?.handle,
+        password: this.options?.password,
+        profileUrl: this.#profileUrl,
+        serviceUrl: this.#serviceUrl,
+      });
+      await bluesky.deletePost(bskyUrl);
+      console.log(\`[Bluesky] Deleted syndicated post: \${bskyUrl}\`);
+    } catch (error) {
+      throw new IndiekitError(error.message, {
+        cause: error,
+        plugin: this.name,
+        status: error.statusCode,
+      });
+    }
+  }
+
+  init(Indiekit) {`;
+
+async function exists(p) {
+  try { await access(p); return true; } catch { return false; }
+}
+
+async function applyPatch(candidates, oldSnippet, newSnippet, label) {
+  let checked = 0;
+  let patched = 0;
+
+  for (const filePath of candidates) {
+    if (!(await exists(filePath))) continue;
+    checked++;
+
+    const source = await readFile(filePath, "utf8");
+    if (source.includes(MARKER)) {
+      console.log(`[postinstall] patch-bluesky-syndicator-delete: ${label} already applied to ${filePath}`);
+      continue;
+    }
+
+    if (!source.includes(oldSnippet)) {
+      console.warn(`[postinstall] patch-bluesky-syndicator-delete: ${label} snippet not found in ${filePath}`);
+      continue;
+    }
+
+    await writeFile(filePath, source.replace(oldSnippet, newSnippet), "utf8");
+    patched++;
+    console.log(`[postinstall] Applied patch-bluesky-syndicator-delete (${label}) to ${filePath}`);
+  }
+
+  return { checked, patched };
+}
+
+const a = await applyPatch(blueskyClassCandidates, OLD_POST_REPOST, NEW_POST_REPOST, "Bluesky#deletePost");
+const b = await applyPatch(indexCandidates, OLD_SYNDICATE_END, NEW_SYNDICATE_END, "BlueskySyndicator#delete");
+
+const totalChecked = a.checked + b.checked;
+const totalPatched = a.patched + b.patched;
+
+if (totalChecked === 0) {
+  console.log("[postinstall] patch-bluesky-syndicator-delete: no target files found");
+} else if (totalPatched === 0) {
+  console.log("[postinstall] patch-bluesky-syndicator-delete: already up to date");
+} else {
+  console.log(`[postinstall] patch-bluesky-syndicator-delete: patched ${totalPatched} file(s)`);
+}

scripts/patch-micropub-delete-propagation.mjs

@@ -0,0 +1,85 @@
+/**
+ * Patch: propagate Micropub deletes to registered syndicators.
+ *
+ * Bug:
+ *   action.js case "delete" only calls postData.delete() + postContent.delete().
+ *   It never notifies syndicators, so deleting a post from the web backend
+ *   leaves orphaned copies on ActivityPub (Fediverse) and Bluesky.
+ *
+ * Fix:
+ *   After postContent.delete() returns, iterate publication.syndicationTargets
+ *   and call syndicator.delete(url, syndication) on any syndicator that exposes
+ *   the method.  The syndication URLs are read from data._deletedProperties
+ *   (preserved by postData.delete() before stripping the properties).
+ *
+ *   Errors from individual syndicators are caught and logged — a failed remote
+ *   delete must never break the 200 response for the local delete.
+ */
+
+import { access, readFile, writeFile } from "node:fs/promises";
+
+const MARKER = "// [patch] micropub-delete-propagation";
+
+const candidates = [
+  "node_modules/@indiekit/endpoint-micropub/lib/controllers/action.js",
+];
+
+const OLD_DELETE_CASE = `      case "delete": {
+        data = await postData.delete(application, publication, url);
+        content = await postContent.delete(publication, data);
+        break;
+      }`;
+
+const NEW_DELETE_CASE = `      case "delete": { ${MARKER}
+        data = await postData.delete(application, publication, url);
+        content = await postContent.delete(publication, data);
+        // Propagate delete to syndicators (AP, Bluesky, …) ${MARKER}
+        const _deletedSyndication = data?._deletedProperties?.syndication
+          ? [data._deletedProperties.syndication].flat()
+          : [];
+        if (_deletedSyndication.length > 0 && publication.syndicationTargets?.length > 0) {
+          for (const _syndicator of publication.syndicationTargets) {
+            if (typeof _syndicator.delete === "function") {
+              _syndicator.delete(url, _deletedSyndication).catch((err) =>
+                console.warn(\`[Micropub] Syndicator delete failed (\${_syndicator.name}): \${err.message}\`),
+              );
+            }
+          }
+        }
+        break;
+      }`;
+
+async function exists(p) {
+  try { await access(p); return true; } catch { return false; }
+}
+
+let checked = 0;
+let patched = 0;
+
+for (const filePath of candidates) {
+  if (!(await exists(filePath))) continue;
+  checked++;
+
+  const source = await readFile(filePath, "utf8");
+  if (source.includes(MARKER)) {
+    console.log(`[postinstall] patch-micropub-delete-propagation: already applied to ${filePath}`);
+    continue;
+  }
+
+  if (!source.includes(OLD_DELETE_CASE)) {
+    console.warn(`[postinstall] patch-micropub-delete-propagation: snippet not found in ${filePath}`);
+    continue;
+  }
+
+  await writeFile(filePath, source.replace(OLD_DELETE_CASE, NEW_DELETE_CASE), "utf8");
+  patched++;
+  console.log(`[postinstall] Applied patch-micropub-delete-propagation to ${filePath}`);
+}
+
+if (checked === 0) {
+  console.log("[postinstall] patch-micropub-delete-propagation: no target files found");
+} else if (patched === 0) {
+  console.log("[postinstall] patch-micropub-delete-propagation: already up to date");
+} else {
+  console.log(`[postinstall] patch-micropub-delete-propagation: patched ${patched} file(s)`);
+}