diff --git a/docs/concepts/multi-agent.md b/docs/concepts/multi-agent.md
index eda035e72a4..5ad5e35d7e7 100644
--- a/docs/concepts/multi-agent.md
+++ b/docs/concepts/multi-agent.md
@@ -499,6 +499,41 @@ Notes:
 - For stricter gating, set `agents.list[].groupChat.mentionPatterns` and keep
   group allowlists enabled for the channel.
 
+## Per-Agent Memory Search (QMD Extra Collections)
+
+Agents with shared workspaces already share `MEMORY.md` and `memory/*.md` files.
+However, session transcripts are indexed per-agent in separate QMD collections.
+
+To let one agent search another agent's session transcripts, add
+`memorySearch.qmd.extraCollections`:
+
+```json5
+{
+  agents: {
+    list: [
+      {
+        id: "main",
+        memorySearch: {
+          qmd: {
+            extraCollections: [
+              {
+                path: "~/.openclaw/agents/family/qmd/sessions",
+                pattern: "**/*.md",
+              },
+            ],
+          },
+        },
+      },
+      { id: "family" }, // no extraCollections: can only search its own sessions
+    ],
+  },
+}
+```
+
+This gives directional control: each agent opts in to what it can search. The
+family agent above cannot search the main agent's sessions, but main can search
+family's.
+
 ## Per-Agent Sandbox and Tool Configuration
 
 Each agent can have its own sandbox and tool restrictions:
diff --git a/docs/gateway/configuration-reference.md b/docs/gateway/configuration-reference.md
index 11ea717513a..50dca8b596f 100644
--- a/docs/gateway/configuration-reference.md
+++ b/docs/gateway/configuration-reference.md
@@ -1410,6 +1410,7 @@ scripts/sandbox-browser-setup.sh   # optional browser image
 - `runtime`: optional per-agent runtime descriptor. Use `type: "acp"` with `runtime.acp` defaults (`agent`, `backend`, `mode`, `cwd`) when the agent should default to ACP harness sessions.
 - `identity.avatar`: workspace-relative path, `http(s)` URL, or `data:` URI.
 - `identity` derives defaults: `ackReaction` from `emoji`, `mentionPatterns` from `name`/`emoji`.
+- `memorySearch.qmd.extraCollections`: additional QMD collections for this agent's memory search. Useful for cross-agent session search (for example, letting one agent search another agent's session transcripts). Each entry: `{ path, pattern?, name? }`.
 - `subagents.allowAgents`: allowlist of agent ids for `sessions_spawn` (`["*"]` = any; default: same agent only).
 - Sandbox inheritance guard: if the requester session is sandboxed, `sessions_spawn` rejects targets that would run unsandboxed.
 
diff --git a/src/config/config.schema-regressions.test.ts b/src/config/config.schema-regressions.test.ts
index 7a6053fd01c..e2c28954b28 100644
--- a/src/config/config.schema-regressions.test.ts
+++ b/src/config/config.schema-regressions.test.ts
@@ -51,6 +51,31 @@ describe("config schema regressions", () => {
     expect(res.ok).toBe(true);
   });
 
+  it("accepts per-agent memorySearch.qmd.extraCollections", () => {
+    const res = validateConfigObject({
+      agents: {
+        list: [
+          {
+            id: "agent-b",
+            memorySearch: {
+              qmd: {
+                extraCollections: [
+                  {
+                    name: "family-sessions",
+                    path: "~/.openclaw/agents/family/qmd/sessions",
+                    pattern: "**/*.md",
+                  },
+                ],
+              },
+            },
+          },
+        ],
+      },
+    });
+
+    expect(res.ok).toBe(true);
+  });
+
   it("accepts safe iMessage remoteHost", () => {
     const res = validateConfigObject({
       channels: {
diff --git a/src/config/schema.help.ts b/src/config/schema.help.ts
index 947726bd7e8..4386ce2c364 100644
--- a/src/config/schema.help.ts
+++ b/src/config/schema.help.ts
@@ -788,6 +788,8 @@ export const FIELD_HELP: Record<string, string> = {
     'Selects which multimodal file types are indexed from extraPaths: "image", "audio", or "all". Keep this narrow to avoid indexing large binary corpora unintentionally.',
   "agents.defaults.memorySearch.multimodal.maxFileBytes":
     "Sets the maximum bytes allowed per multimodal file before it is skipped during memory indexing. Use this to cap upload cost and indexing latency, or raise it for short high-quality audio clips.",
+  "agents.list[].memorySearch.qmd.extraCollections":
+    "Per-agent extra QMD collections to include in memory search.",
   "agents.defaults.memorySearch.experimental.sessionMemory":
     "Indexes session transcripts into memory search so responses can reference prior chat turns. Keep this off unless transcript recall is needed, because indexing cost and storage usage both increase.",
   "agents.defaults.memorySearch.provider":
diff --git a/src/config/schema.labels.ts b/src/config/schema.labels.ts
index 53317e2fcd2..9f234f605fd 100644
--- a/src/config/schema.labels.ts
+++ b/src/config/schema.labels.ts
@@ -319,6 +319,7 @@ export const FIELD_LABELS: Record<string, string> = {
   "agents.defaults.memorySearch.multimodal.enabled": "Enable Memory Search Multimodal",
   "agents.defaults.memorySearch.multimodal.modalities": "Memory Search Multimodal Modalities",
   "agents.defaults.memorySearch.multimodal.maxFileBytes": "Memory Search Multimodal Max File Bytes",
+  "agents.list[].memorySearch.qmd.extraCollections": "Agent QMD Extra Collections",
   "agents.defaults.memorySearch.experimental.sessionMemory":
     "Memory Search Session Index (Experimental)",
   "agents.defaults.memorySearch.provider": "Memory Search Provider",
diff --git a/src/config/types.tools.ts b/src/config/types.tools.ts
index f42fa365f6f..f5cc5da842c 100644
--- a/src/config/types.tools.ts
+++ b/src/config/types.tools.ts
@@ -328,6 +328,14 @@ export type MemorySearchConfig = {
     /** Max bytes allowed per multimodal file before it is skipped. */
     maxFileBytes?: number;
   };
+  /** Per-agent QMD extra collections. */
+  qmd?: {
+    extraCollections?: Array<{
+      name?: string;
+      path: string;
+      pattern?: string;
+    }>;
+  };
   /** Experimental memory search settings. */
   experimental?: {
     /** Enable session transcript indexing (experimental, default: false). */
diff --git a/src/config/zod-schema.agent-runtime.ts b/src/config/zod-schema.agent-runtime.ts
index 10f0f8637e9..7e4be3b1e94 100644
--- a/src/config/zod-schema.agent-runtime.ts
+++ b/src/config/zod-schema.agent-runtime.ts
@@ -598,6 +598,22 @@ export const MemorySearchSchema = z
       })
       .strict()
       .optional(),
+    qmd: z
+      .object({
+        extraCollections: z
+          .array(
+            z
+              .object({
+                name: z.string().optional(),
+                path: z.string(),
+                pattern: z.string().optional(),
+              })
+              .strict(),
+          )
+          .optional(),
+      })
+      .strict()
+      .optional(),
     experimental: z
       .object({
         sessionMemory: z.boolean().optional(),
diff --git a/src/memory/backend-config.test.ts b/src/memory/backend-config.test.ts
index 61fa62f9316..542652860af 100644
--- a/src/memory/backend-config.test.ts
+++ b/src/memory/backend-config.test.ts
@@ -108,6 +108,103 @@ describe("resolveMemoryBackendConfig", () => {
     expect(devNames.has("workspace-dev")).toBe(true);
   });
 
+  it("adds per-agent qmd extra collections only for the configured agent", () => {
+    const cfg = {
+      agents: {
+        defaults: { workspace: "/workspace/root" },
+        list: [
+          {
+            id: "main",
+            default: true,
+            workspace: "/workspace/root",
+          },
+          {
+            id: "agent-b",
+            workspace: "/workspace/agent-b",
+            memorySearch: {
+              qmd: {
+                extraCollections: [
+                  {
+                    name: "family-sessions",
+                    path: "/workspace/family/qmd/sessions",
+                    pattern: "**/*.md",
+                  },
+                ],
+              },
+            },
+          },
+        ],
+      },
+      memory: {
+        backend: "qmd",
+        qmd: {
+          includeDefaultMemory: false,
+        },
+      },
+    } as OpenClawConfig;
+
+    const mainResolved = resolveMemoryBackendConfig({ cfg, agentId: "main" });
+    const agentBResolved = resolveMemoryBackendConfig({ cfg, agentId: "agent-b" });
+
+    const mainPaths = new Set((mainResolved.qmd?.collections ?? []).map((entry) => entry.path));
+    const agentBCollections = agentBResolved.qmd?.collections ?? [];
+
+    const expectedPath = path.resolve("/workspace/family/qmd/sessions");
+    expect(mainPaths.has(expectedPath)).toBe(false);
+    expect(
+      agentBCollections.some(
+        (entry) =>
+          entry.path === expectedPath && entry.pattern === "**/*.md" && entry.kind === "custom",
+      ),
+    ).toBe(true);
+  });
+
+  it("uses explicit extraCollection names without agent-scoping", () => {
+    const cfg = {
+      agents: {
+        defaults: { workspace: "/tmp/memory-test" },
+        list: [
+          {
+            id: "main",
+            default: true,
+            workspace: "/workspace/main",
+            memorySearch: {
+              qmd: {
+                extraCollections: [
+                  {
+                    name: "sessions-family",
+                    path: "/workspace/family/sessions",
+                    pattern: "**/*.md",
+                  },
+                  {
+                    path: "/workspace/auto-named",
+                  },
+                ],
+              },
+            },
+          },
+        ],
+      },
+      memory: {
+        backend: "qmd",
+        qmd: {
+          includeDefaultMemory: false,
+        },
+      },
+    } as OpenClawConfig;
+
+    const resolved = resolveMemoryBackendConfig({ cfg, agentId: "main" });
+    const collections = resolved.qmd?.collections ?? [];
+
+    const explicit = collections.find((c) => c.path === path.resolve("/workspace/family/sessions"));
+    expect(explicit).toBeDefined();
+    expect(explicit?.name).toBe("sessions-family");
+
+    const autoNamed = collections.find((c) => c.path === path.resolve("/workspace/auto-named"));
+    expect(autoNamed).toBeDefined();
+    expect(autoNamed?.name).toContain("main");
+  });
+
   it("resolves qmd update timeout overrides", () => {
     const cfg = {
       agents: { defaults: { workspace: "/tmp/memory-test" } },
diff --git a/src/memory/backend-config.ts b/src/memory/backend-config.ts
index da1c13819a3..82583015ce9 100644
--- a/src/memory/backend-config.ts
+++ b/src/memory/backend-config.ts
@@ -1,5 +1,5 @@
 import path from "node:path";
-import { resolveAgentWorkspaceDir } from "../agents/agent-scope.js";
+import { resolveAgentConfig, resolveAgentWorkspaceDir } from "../agents/agent-scope.js";
 import { parseDurationMs } from "../cli/parse-duration.js";
 import type { OpenClawConfig } from "../config/config.js";
 import type { SessionSendPolicyConfig } from "../config/types.base.js";
@@ -272,6 +272,43 @@ function resolveMcporterConfig(raw?: MemoryQmdMcporterConfig): ResolvedQmdMcport
   return parsed;
 }
 
+function resolveAgentExtraCollections(
+  rawCollections: Array<{ name?: string; path: string; pattern?: string }> | undefined,
+  workspaceDir: string,
+  existing: Set<string>,
+  agentId: string,
+): ResolvedQmdCollection[] {
+  if (!rawCollections?.length) {
+    return [];
+  }
+  const collections: ResolvedQmdCollection[] = [];
+  rawCollections.forEach((entry, index) => {
+    const trimmedPath = entry?.path?.trim();
+    if (!trimmedPath) {
+      return;
+    }
+    let resolved: string;
+    try {
+      resolved = resolvePath(trimmedPath, workspaceDir);
+    } catch {
+      return;
+    }
+    const pattern = entry.pattern?.trim() || "**/*.md";
+    const explicitName = entry.name?.trim();
+    const baseName = explicitName
+      ? sanitizeName(explicitName)
+      : scopeCollectionBase(`agent-extra-${index + 1}`, agentId);
+    const name = ensureUniqueName(baseName, existing);
+    collections.push({
+      name,
+      path: resolved,
+      pattern,
+      kind: "custom",
+    });
+  });
+  return collections;
+}
+
 function resolveDefaultCollections(
   include: boolean,
   workspaceDir: string,
@@ -308,9 +345,17 @@ export function resolveMemoryBackendConfig(params: {
   const qmdCfg = params.cfg.memory?.qmd;
   const includeDefaultMemory = qmdCfg?.includeDefaultMemory !== false;
   const nameSet = new Set<string>();
+  const agentQmdExtraCollections = resolveAgentConfig(params.cfg, params.agentId)?.memorySearch?.qmd
+    ?.extraCollections;
   const collections = [
     ...resolveDefaultCollections(includeDefaultMemory, workspaceDir, nameSet, params.agentId),
     ...resolveCustomPaths(qmdCfg?.paths, workspaceDir, nameSet, params.agentId),
+    ...resolveAgentExtraCollections(
+      agentQmdExtraCollections,
+      workspaceDir,
+      nameSet,
+      params.agentId,
+    ),
   ];
 
   const rawCommand = qmdCfg?.command?.trim() || "qmd";
diff --git a/src/memory/qmd-manager.test.ts b/src/memory/qmd-manager.test.ts
index f283459c61d..aa98819a887 100644
--- a/src/memory/qmd-manager.test.ts
+++ b/src/memory/qmd-manager.test.ts
@@ -450,6 +450,77 @@ describe("QmdMemoryManager", () => {
     expect(addCalls).toHaveLength(0);
   });
 
+  it("remaps extra collections to existing qmd collection names when add conflicts on path", async () => {
+    const familySessionsPath = path.join(tmpRoot, "family-sessions");
+    await fs.mkdir(familySessionsPath, { recursive: true });
+    cfg = {
+      agents: {
+        list: [
+          {
+            id: agentId,
+            default: true,
+            workspace: workspaceDir,
+            memorySearch: {
+              qmd: {
+                extraCollections: [{ path: familySessionsPath, pattern: "**/*.md" }],
+              },
+            },
+          },
+        ],
+      },
+      memory: {
+        backend: "qmd",
+        qmd: {
+          includeDefaultMemory: false,
+          update: { interval: "0s", debounceMs: 60_000, onBoot: false },
+          paths: [{ path: workspaceDir, pattern: "**/*.md", name: "workspace" }],
+        },
+      },
+    } as OpenClawConfig;
+
+    spawnMock.mockImplementation((_cmd: string, args: string[]) => {
+      if (args[0] === "collection" && args[1] === "list") {
+        const child = createMockChild({ autoClose: false });
+        const jsonData = JSON.stringify([
+          { name: "workspace-main", path: workspaceDir, pattern: "**/*.md" },
+          { name: "sessions-family", path: familySessionsPath, pattern: "**/*.md" },
+        ]);
+        emitAndClose(child, "stdout", jsonData, 0);
+        return child;
+      }
+      if (args[0] === "collection" && args[1] === "add") {
+        const pathArg = args[2] ?? "";
+        if (path.resolve(pathArg) === path.resolve(familySessionsPath)) {
+          const child = createMockChild({ autoClose: false });
+          emitAndClose(child, "stderr", "A collection already exists for this path and pattern", 1);
+          return child;
+        }
+        return createMockChild();
+      }
+      if (args[0] === "collection" && args[1] === "remove") {
+        // Rebind attempt: simulate removal failure to trigger alias fallback.
+        const child = createMockChild({ autoClose: false });
+        emitAndClose(child, "stderr", "collection not found", 1);
+        return child;
+      }
+      return createMockChild();
+    });
+
+    const { manager } = await createManager({ mode: "full" });
+
+    // Verify the remap was logged
+    expect(logInfoMock).toHaveBeenCalledWith(
+      expect.stringContaining("remapped to existing collection sessions-family"),
+    );
+
+    // Verify the aliased QMD-side name is in collectionRoots so search results
+    // from that collection won't be silently dropped by toDocLocation().
+    const roots = (manager as unknown as { collectionRoots: Map<string, unknown> }).collectionRoots;
+    expect(roots.has("sessions-family")).toBe(true);
+
+    await manager.close();
+  });
+
   it("migrates unscoped legacy collections before adding scoped names", async () => {
     cfg = {
       ...cfg,
diff --git a/src/memory/qmd-manager.ts b/src/memory/qmd-manager.ts
index 46a80156677..d4bf5f3a70d 100644
--- a/src/memory/qmd-manager.ts
+++ b/src/memory/qmd-manager.ts
@@ -28,6 +28,7 @@ import type {
 type SqliteDatabase = import("node:sqlite").DatabaseSync;
 import type {
   ResolvedMemoryBackendConfig,
+  ResolvedQmdCollection,
   ResolvedQmdConfig,
   ResolvedQmdMcporterConfig,
 } from "./backend-config.js";
@@ -147,8 +148,9 @@ export class QmdMemoryManager implements MemorySearchManager {
   private readonly xdgCacheHome: string;
   private readonly indexPath: string;
   private readonly env: NodeJS.ProcessEnv;
-  private readonly managedCollectionNames: string[];
+  private managedCollectionNames: string[];
   private readonly collectionRoots = new Map<string, CollectionRoot>();
+  private readonly collectionAliases = new Map<string, string>();
   private readonly sources = new Set<MemorySource>();
   private readonly docPathCache = new Map<
     string,
@@ -275,10 +277,12 @@ export class QmdMemoryManager implements MemorySearchManager {
 
   private bootstrapCollections(): void {
     this.collectionRoots.clear();
+    this.collectionAliases.clear();
     this.sources.clear();
     for (const collection of this.qmd.collections) {
       const kind: MemorySource = collection.kind === "sessions" ? "sessions" : "memory";
       this.collectionRoots.set(collection.name, { path: collection.path, kind });
+      this.collectionAliases.set(collection.name, collection.name);
       this.sources.add(kind);
     }
   }
@@ -322,13 +326,29 @@ export class QmdMemoryManager implements MemorySearchManager {
             addErrorMessage: message,
           });
           if (!rebound) {
-            log.warn(`qmd collection add skipped for ${collection.name}: ${message}`);
+            // Fallback: try path-only alias (less strict than path+pattern rebind).
+            const aliasName = this.findCollectionByPath(collection, existing);
+            if (aliasName) {
+              this.collectionAliases.set(collection.name, aliasName);
+              if (!this.collectionRoots.has(aliasName)) {
+                const rootKind: MemorySource =
+                  collection.kind === "sessions" ? "sessions" : "memory";
+                this.collectionRoots.set(aliasName, { path: collection.path, kind: rootKind });
+              }
+              log.info(
+                `qmd collection ${collection.name} remapped to existing collection ${aliasName} (same path)`,
+              );
+            } else {
+              log.warn(`qmd collection add skipped for ${collection.name}: ${message}`);
+            }
           }
           continue;
         }
         log.warn(`qmd collection add failed for ${collection.name}: ${message}`);
       }
     }
+    // Recompute managed names after potential alias discoveries.
+    this.managedCollectionNames = this.computeManagedCollectionNames();
   }
 
   private async listCollectionsBestEffort(): Promise<Map<string, ListedCollection>> {
@@ -366,6 +386,22 @@ export class QmdMemoryManager implements MemorySearchManager {
     return null;
   }
 
+  private findCollectionByPath(
+    target: ResolvedQmdCollection,
+    existing: Map<string, ListedCollection>,
+  ): string | undefined {
+    const normalizedPath = path.resolve(target.path);
+    for (const [name, details] of existing) {
+      if (name === target.name) {
+        continue;
+      }
+      if (details.path && path.resolve(details.path) === normalizedPath) {
+        return name;
+      }
+    }
+    return undefined;
+  }
+
   private async tryRebindConflictingCollection(params: {
     collection: ManagedCollection;
     existing: Map<string, ListedCollection>;
@@ -2037,12 +2073,16 @@ export class QmdMemoryManager implements MemorySearchManager {
     const seen = new Set<string>();
     const names: string[] = [];
     for (const collection of this.qmd.collections) {
-      const name = collection.name?.trim();
-      if (!name || seen.has(name)) {
+      const configName = collection.name?.trim();
+      if (!configName) {
         continue;
       }
-      seen.add(name);
-      names.push(name);
+      const resolved = this.collectionAliases.get(configName) ?? configName;
+      if (seen.has(resolved)) {
+        continue;
+      }
+      seen.add(resolved);
+      names.push(resolved);
     }
     return names;
   }