diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34087d86c28..8b5eceabcc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -44,6 +44,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Memory: keep `memory_search` result `corpus` labels aligned with the hit source, so session transcript hits surface as `sessions` and memory-file hits stay `memory`. Fixes #72885. (#71898, #72886) Thanks @rubencu.
 - Google/Gemini: normalize retired nested Gemini 3 Pro Preview ids while converting manifest catalog rows into emitted provider config, so `google/gemini-3.1-pro-preview` is used for testing instead of `google/gemini-3-pro-preview`.
 - Native apps: advertise the Gateway protocol compatibility range so chat and node sessions can connect to v3 gateways after additive v4 client updates.
 - Gateway/agents: keep stale `sessions_send` ACP manager and `web_fetch` runtime chunks importable after package updates, preventing live gateways from breaking before restart. Fixes #78804. Thanks @Gomesy72.
diff --git a/extensions/memory-core/src/tools.test.ts b/extensions/memory-core/src/tools.test.ts
index e0336eadbf0..9db5e8e1790 100644
--- a/extensions/memory-core/src/tools.test.ts
+++ b/extensions/memory-core/src/tools.test.ts
@@ -1,4 +1,4 @@
-import { beforeEach, describe, expect, it } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 import {
   getMemorySearchManagerMockConfigs,
   getMemorySearchManagerMockParams,
@@ -13,6 +13,26 @@ import {
   expectUnavailableMemorySearchDetails,
 } from "./tools.test-helpers.js";
 
+const sessionStore = vi.hoisted(() => ({
+  "agent:main:main": {
+    sessionId: "thread-1",
+    updatedAt: 1,
+    sessionFile: "/tmp/sessions/thread-1.jsonl",
+  },
+}));
+
+vi.mock("openclaw/plugin-sdk/session-transcript-hit", async (importOriginal) => {
+  const actual =
+    await importOriginal<typeof import("openclaw/plugin-sdk/session-transcript-hit")>();
+  return {
+    ...actual,
+    loadCombinedSessionStoreForGateway: vi.fn(() => ({
+      storePath: "(test)",
+      store: sessionStore,
+    })),
+  };
+});
+
 describe("memory_search unavailable payloads", () => {
   beforeEach(() => {
     resetMemoryToolMockState({ searchImpl: async () => [] });
@@ -107,6 +127,12 @@ describe("memory_search unavailable payloads", () => {
       (result.details as { debug?: { searchMs?: number } }).debug?.searchMs,
     ).toBeGreaterThanOrEqual(0);
   });
+});
+
+describe("memory_search corpus labels", () => {
+  beforeEach(() => {
+    resetMemoryToolMockState({ searchImpl: async () => [] });
+  });
 
   it("uses explicit plugin context agent over synthetic active-memory session keys", async () => {
     const tool = createMemorySearchToolOrThrow({
@@ -170,4 +196,57 @@ describe("memory_search unavailable payloads", () => {
 
     expect(getMemorySearchManagerMockConfigs()).toEqual([patchedConfig]);
   });
+
+  it("preserves source corpus labels for memory and session transcript hits", async () => {
+    setMemorySearchImpl(async () => [
+      {
+        path: "MEMORY.md",
+        startLine: 3,
+        endLine: 4,
+        score: 0.95,
+        snippet: "Durable memory note",
+        source: "memory" as const,
+      },
+      {
+        path: "sessions/thread-1.jsonl",
+        startLine: 1,
+        endLine: 2,
+        score: 0.9,
+        snippet: "Thread transcript note",
+        source: "sessions" as const,
+      },
+    ]);
+
+    const tool = createMemorySearchToolOrThrow({
+      config: {
+        agents: { list: [{ id: "main", default: true }] },
+        memory: { citations: "off" },
+        tools: { sessions: { visibility: "all" } },
+      },
+      agentSessionKey: "agent:main:main",
+    });
+    const result = await tool.execute("mixed", { query: "thread note" });
+    const details = result.details as { results: Array<{ corpus: string; path: string }> };
+
+    expect(details.results).toEqual([
+      {
+        corpus: "memory",
+        path: "MEMORY.md",
+        startLine: 3,
+        endLine: 4,
+        score: 0.95,
+        snippet: "Durable memory note",
+        source: "memory",
+      },
+      {
+        corpus: "sessions",
+        path: "sessions/thread-1.jsonl",
+        startLine: 1,
+        endLine: 2,
+        score: 0.9,
+        snippet: "Thread transcript note",
+        source: "sessions",
+      },
+    ]);
+  });
 });
diff --git a/extensions/memory-core/src/tools.ts b/extensions/memory-core/src/tools.ts
index 56216bf932e..c9a7fba1295 100644
--- a/extensions/memory-core/src/tools.ts
+++ b/extensions/memory-core/src/tools.ts
@@ -37,7 +37,7 @@ import {
 } from "./tools.shared.js";
 
 type MemorySearchToolResult =
-  | (Record<string, unknown> & { corpus: "memory"; score: number; path: string })
+  | (MemorySearchResult & { corpus: MemorySource })
   | MemoryCorpusSearchResult;
 
 function sortMemorySearchToolResults<T extends { score: number; path: string }>(results: T[]): T[] {
@@ -267,9 +267,7 @@ export function createMemorySearchTool(options: {
           });
           const searchStartedAt = Date.now();
           let rawResults: MemorySearchResult[] = [];
-          let surfacedMemoryResults: Array<
-            Record<string, unknown> & { corpus: "memory"; score: number; path: string }
-          > = [];
+          let surfacedMemoryResults: Array<MemorySearchResult & { corpus: MemorySource }> = [];
           let provider: string | undefined;
           let model: string | undefined;
           let fallback: unknown;
@@ -326,7 +324,7 @@ export function createMemorySearchTool(options: {
                 : decorated;
             surfacedMemoryResults = memoryResults.map((result) => ({
               ...result,
-              corpus: "memory" as const,
+              corpus: result.source,
             }));
             const sleepTimezone = resolveMemoryDeepDreamingConfig({
               pluginConfig: resolveMemoryCorePluginConfig(cfg),
diff --git a/src/media/image-ops.tempdir.test.ts b/src/media/image-ops.tempdir.test.ts
index 83090cd736c..5ef0de93c52 100644
--- a/src/media/image-ops.tempdir.test.ts
+++ b/src/media/image-ops.tempdir.test.ts
@@ -34,7 +34,7 @@ describe("image-ops temp dir", () => {
     expect(prefix?.endsWith("-")).toBe(true);
     const uuid = prefix?.slice(uuidPrefix.length, -1) ?? "";
     expect(uuid).toHaveLength(36);
-    expect(Array.from(uuid).every((char) => /[0-9a-f-]/u.test(char))).toBe(true);
+    expect(/^[0-9a-f-]+$/u.test(uuid)).toBe(true);
     expect([8, 13, 18, 23].map((index) => uuid[index])).toEqual(["-", "-", "-", "-"]);
     expect(path.dirname(prefix ?? "")).toBe(secureRoot);
     expect(createdTempDir.startsWith(prefix ?? "")).toBe(true);