fix memory wiki empty related blocks (#78399)

Co-authored-by: Alex Knight <15041791+amknight@users.noreply.github.com>

CHANGELOG.md

@@ -121,6 +121,7 @@ Docs: https://docs.openclaw.ai
 - Dependencies: override transitive `ip-address` to `10.2.0` so the runtime lockfile no longer includes the vulnerable `10.1.0` build flagged by Dependabot alert 109. Thanks @vincentkoc.
 - Plugins/install: apply OpenClaw's npm security overrides inside managed external plugin npm roots so hoisted plugin dependencies inherit the host package hardening. Thanks @vincentkoc.
 - Feishu: hydrate missing native topic starter thread IDs before session routing so first turns and follow-ups stay in the same topic session. Fixes #78262. Thanks @joeyzenghuan.
+- Memory Wiki: skip empty and whitespace-only source pages when refreshing generated Related blocks, preventing blank pages from being rewritten into Related-only stubs. Fixes #78121. Thanks @amknight.
 - LINE: reject `dmPolicy: "open"` configs without wildcard `allowFrom` so webhook DMs fail validation instead of being acknowledged and silently blocked before inbound processing. Fixes #78316.
 - Telegram/Codex: keep message-tool-only progress drafts visible and render native Codex tool progress once per tool instead of duplicating item/tool draft lines. Fixes #75641. (#77949) Thanks @keshavbotagent.
 - Providers/xAI: stop sending OpenAI-style reasoning effort controls to native Grok Responses models, so `xai/grok-4.3` no longer fails live Docker/Gateway runs with `Invalid reasoning effort`.

extensions/memory-wiki/src/compile.test.ts

@@ -170,6 +170,24 @@ describe("compileMemoryWikiVault", () => {
     );
   });
 
+  it("does not rewrite empty source pages into related-only stubs", async () => {
+    const { rootDir, config } = await createVault({
+      rootDir: nextCaseRoot(),
+      initialize: true,
+    });
+    const emptySourcePath = path.join(rootDir, "sources", "empty.md");
+    const whitespaceSourcePath = path.join(rootDir, "sources", "whitespace.md");
+    await fs.writeFile(emptySourcePath, "", "utf8");
+    await fs.writeFile(whitespaceSourcePath, " \n\t", "utf8");
+
+    const result = await compileMemoryWikiVault(config);
+
+    await expect(fs.readFile(emptySourcePath, "utf8")).resolves.toBe("");
+    await expect(fs.readFile(whitespaceSourcePath, "utf8")).resolves.toBe(" \n\t");
+    expect(result.updatedFiles).not.toContain(emptySourcePath);
+    expect(result.updatedFiles).not.toContain(whitespaceSourcePath);
+  });
+
   it("does not relate every page through a broad shared source", async () => {
     const { rootDir, config } = await createVault({
       rootDir: nextCaseRoot(),

extensions/memory-wiki/src/compile.ts

@@ -776,6 +776,9 @@ async function refreshPageRelatedBlocks(params: {
       continue;
     }
     const original = await root.readText(page.relativePath);
+    if (original.trim().length === 0) {
+      continue;
+    }
     const updated = withTrailingNewline(
       replaceManagedMarkdownBlock({
         original,