diff --git a/packages/plugins/plugin-llm-wiki/src/ui/index.tsx b/packages/plugins/plugin-llm-wiki/src/ui/index.tsx
index e73704e3e66..8110e827bc6 100644
--- a/packages/plugins/plugin-llm-wiki/src/ui/index.tsx
+++ b/packages/plugins/plugin-llm-wiki/src/ui/index.tsx
@@ -2829,7 +2829,7 @@ function SpaceRowMenu({
 
   const handleArchive = async () => {
     if (!companyId || isDefault || busy) return;
-    if (typeof window !== "undefined" && !window.confirm(`Archive ${space.displayName}? Pages remain on disk; you can restore from settings.`)) {
+    if (typeof window !== "undefined" && !window.confirm(`Archive ${space.displayName}? Pages remain on disk; you can restore later through the plugin API or by un-archiving from the database.`)) {
       return;
     }
     setBusy(true);
@@ -6768,7 +6768,7 @@ function SpaceEditCard({
 
   async function archive() {
     if (!companyId || isDefault || isOnlySpace || archiveBusy) return;
-    if (typeof window !== "undefined" && !window.confirm(`Archive ${space.displayName}? Pages stay on disk; you can restore by un-archiving from the database.`)) {
+    if (typeof window !== "undefined" && !window.confirm(`Archive ${space.displayName}? Pages stay on disk; you can restore later through the plugin API or by un-archiving from the database.`)) {
       return;
     }
     setArchiveBusy(true);
diff --git a/packages/plugins/plugin-llm-wiki/src/wiki.ts b/packages/plugins/plugin-llm-wiki/src/wiki.ts
index bbdeb7bb3e5..d5550b7606f 100644
--- a/packages/plugins/plugin-llm-wiki/src/wiki.ts
+++ b/packages/plugins/plugin-llm-wiki/src/wiki.ts
@@ -1367,6 +1367,25 @@ export async function resolveSpace(ctx: PluginContext, input: SpaceInput): Promi
   return wikiSpaceFromRow(rows[0]);
 }
 
+async function resolveSpaceAnyStatus(ctx: PluginContext, input: SpaceInput): Promise<WikiSpace> {
+  const wikiId = normalizeWikiId(input.wikiId);
+  const slug = normalizeSpaceSlug(input.spaceSlug);
+  if (slug === DEFAULT_SPACE_SLUG) {
+    return ensureDefaultSpace(ctx, { companyId: input.companyId, wikiId });
+  }
+  const rows = await ctx.db.query<WikiSpaceRow>(
+    `SELECT id, company_id, wiki_id, slug, display_name, space_type, folder_mode, root_folder_key,
+            path_prefix, configured_root_path, access_scope, owner_user_id, owner_agent_id, team_key,
+            settings, status, created_at::text AS created_at, updated_at::text AS updated_at
+       FROM ${spaceTable(ctx)}
+      WHERE company_id = $1 AND wiki_id = $2 AND slug = $3
+      LIMIT 1`,
+    [input.companyId, wikiId, slug],
+  );
+  if (!rows[0]) throw new Error(`LLM Wiki space not found: ${slug}`);
+  return wikiSpaceFromRow(rows[0]);
+}
+
 export async function listSpaces(ctx: PluginContext, input: { companyId: string; wikiId?: string | null }): Promise<{ spaces: WikiSpace[] }> {
   const wikiId = normalizeWikiId(input.wikiId);
   await ensureDefaultSpace(ctx, { companyId: input.companyId, wikiId });
@@ -1440,12 +1459,12 @@ export async function createSpace(ctx: PluginContext, input: CreateSpaceInput):
 }
 
 export async function updateSpace(ctx: PluginContext, input: UpdateSpaceInput): Promise<{ status: "ok"; space: WikiSpace }> {
-  const space = await resolveSpace(ctx, input);
-  const nextDisplayName = stringField(input.displayName);
   const nextStatus = input.status ?? null;
   if (nextStatus !== null && nextStatus !== "active" && nextStatus !== "archived") {
     throw new Error("LLM Wiki space status must be active or archived.");
   }
+  const space = nextStatus === "active" ? await resolveSpaceAnyStatus(ctx, input) : await resolveSpace(ctx, input);
+  const nextDisplayName = stringField(input.displayName);
   if (space.slug === DEFAULT_SPACE_SLUG && nextStatus === "archived") {
     throw new Error("The default LLM Wiki space cannot be archived.");
   }
diff --git a/packages/plugins/plugin-llm-wiki/tests/plugin.spec.ts b/packages/plugins/plugin-llm-wiki/tests/plugin.spec.ts
index 22b26937f02..75592d76395 100644
--- a/packages/plugins/plugin-llm-wiki/tests/plugin.spec.ts
+++ b/packages/plugins/plugin-llm-wiki/tests/plugin.spec.ts
@@ -2867,6 +2867,52 @@ Duplicate headings receive stable suffixes.
     expect(archived).toBe(true);
   });
 
+  it("restores an archived non-default space through update-space", async () => {
+    const harness = createTestHarness({ manifest });
+    const spaceRow = wikiSpaceRow({
+      id: "77777777-7777-4777-8777-7777777777b2",
+      slug: "qa-space",
+      displayName: "QA Space",
+      pathPrefix: "spaces/qa-space",
+      status: "archived",
+    });
+    let restored = false;
+    const originalQuery = harness.ctx.db.query.bind(harness.ctx.db);
+    harness.ctx.db.query = async <T,>(sql: string, params?: unknown[]) => {
+      harness.dbQueries.push({ sql, params });
+      if (sql.includes("wiki_spaces") && params?.[2] === "qa-space") {
+        if (!restored && sql.includes("status <> 'archived'")) return [] as T[];
+        return [{
+          ...spaceRow,
+          status: restored ? "active" : "archived",
+        }] as T[];
+      }
+      return originalQuery<T>(sql, params);
+    };
+    const originalExecute = harness.ctx.db.execute.bind(harness.ctx.db);
+    harness.ctx.db.execute = async (sql: string, params?: unknown[]) => {
+      if (sql.includes("UPDATE") && sql.includes("wiki_spaces") && params?.includes("active")) restored = true;
+      return originalExecute(sql, params);
+    };
+
+    await plugin.definition.setup(harness.ctx);
+    const updated = await harness.performAction<{
+      status: string;
+      space: { slug: string; status: string };
+    }>("update-space", {
+      companyId: COMPANY_ID,
+      spaceSlug: "qa-space",
+      status: "active",
+    });
+
+    expect(updated.status).toBe("ok");
+    expect(updated.space).toMatchObject({
+      slug: "qa-space",
+      status: "active",
+    });
+    expect(restored).toBe(true);
+  });
+
   it("rejects unknown space statuses through update-space", async () => {
     const harness = createTestHarness({ manifest });
     await plugin.definition.setup(harness.ctx);