diff --git a/README.md b/README.md
index cf77436..623bb37 100644
--- a/README.md
+++ b/README.md
@@ -350,6 +350,14 @@ Exposed to OpenClaw agents:
 - `openclaw ltm import-md [paths...] [--force] [--dry-run] [--delay-ms n] [--max-file-bytes n] [--max-files n] [--max-chunks n]` — Import existing markdown memories. With no paths, scans `memory/`, `MEMORY.md`, and `USER.md`.
 - `openclaw ltm import-md-status [paths...] [--json]` — Show per-file markdown import status: imported, changed, skipped, failed, or not imported.
 
+**Identity files (optional):** When plugin config leaves `userId` / `agentId` as `auto` (or omits them), stable IDs are stored under `<stateDir>/powermem/identity.json` (defaults) and `<stateDir>/powermem/agent-identities.json` (per OpenClaw agent key). If you set `userId` or `agentId` explicitly in `openclaw.json`, those values override the files at runtime.
+
+- `openclaw ltm identity show [--json]` — Print path and stored `userId` / `agentId` in `identity.json`.
+- `openclaw ltm identity set --user-id <id>` / `--agent-id <id>` — Set one or both (missing fields keep existing values or are auto-generated).
+- `openclaw ltm agent-identities show [--json]` — List each OpenClaw agent key and its PowerMem `userId` / `agentId`.
+- `openclaw ltm agent-identities set --agent <openclawAgentKey> --user-id <id>` / `--agent-id <id>` — Update one entry; creating a new key requires both `--user-id` and `--agent-id`.
+- `openclaw ltm sync-user-id [--user-id <id>] [--from identity|agent] [--agent <key>]` — Use a single `userId` in `identity.json` and in every `agent-identities.json` entry (each entry’s PowerMem `agentId` is unchanged). With no `--user-id`, reads the canonical id from `identity.json` (`--from identity`, default) or from one map entry (`--from agent --agent <key>`).
+
 ---
 
 ## Troubleshooting
diff --git a/README_CN.md b/README_CN.md
index 768142c..445d40b 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -351,6 +351,14 @@ openclaw ltm search "咖啡"
 - `openclaw ltm import-md [paths...] [--force] [--dry-run] [--delay-ms n] [--max-file-bytes n] [--max-files n] [--max-chunks n]` — 导入已有 markdown 记忆；不传路径时扫描 `memory/`、`MEMORY.md`、`USER.md`
 - `openclaw ltm import-md-status [paths...] [--json]` — 查看每个 markdown 文件的导入状态：已导入、已变更、跳过、失败或未导入
 
+**身份文件（可选）：** 若插件配置将 `userId` / `agentId` 设为 `auto`（或未填写），稳定 ID 会保存在 `<stateDir>/powermem/identity.json`（默认值）与 `<stateDir>/powermem/agent-identities.json`（按 OpenClaw agent key）。若在 `openclaw.json` 中显式设置了 `userId` 或 `agentId`，运行时将优先使用该配置，覆盖文件中的值。
+
+- `openclaw ltm identity show [--json]` — 打印路径及 `identity.json` 中存储的 `userId` / `agentId`。
+- `openclaw ltm identity set --user-id <id>` / `--agent-id <id>` — 设置其一或两者（未指定的字段保留已有值或自动生成）。
+- `openclaw ltm agent-identities show [--json]` — 列出每个 OpenClaw agent key 及其对应的 PowerMem `userId` / `agentId`。
+- `openclaw ltm agent-identities set --agent <openclawAgentKey> --user-id <id>` / `--agent-id <id>` — 更新一条映射；新建 key 时需同时提供 `--user-id` 与 `--agent-id`。
+- `openclaw ltm sync-user-id [--user-id <id>] [--from identity|agent] [--agent <key>]` — 在 `identity.json` 与 `agent-identities.json` 的每条记录中使用同一个 `userId`（各条目的 PowerMem `agentId` 不变）。省略 `--user-id` 时，从 `identity.json` 读取规范 id（`--from identity`，默认）或从某条映射读取（`--from agent --agent <key>`）。
+
 ---
 
 ## 常见问题
diff --git a/src/dual-write-client.ts b/src/dual-write-client.ts
index 17538b7..dac46fc 100644
--- a/src/dual-write-client.ts
+++ b/src/dual-write-client.ts
@@ -371,12 +371,18 @@ export class DualWriteClient {
             this.syncMaxDelayMs,
             this.syncBaseDelayMs * Math.pow(2, row.retries),
           );
-          const nextRetryAt = new Date(Date.now() + delay).toISOString();
+          const nextRetry = new Date(Date.now() + delay);
+          const nextRetryAt = nextRetry.toISOString();
+          const nextRetryAtLog = nextRetry.toLocaleString(undefined, {
+            dateStyle: "medium",
+            timeStyle: "medium",
+            timeZoneName: "short",
+          });
           const reasonRaw = err instanceof Error ? err.message : String(err);
           const reason = reasonRaw.slice(0, 500);
           this.local.scheduleRetries([row.id], nextRetryAt, reason);
           this.logger?.warn?.(
-            `dual-write: pending id=${row.id} retry scheduled at ${nextRetryAt}, reason=${reason}`,
+            `dual-write: pending id=${row.id} retry scheduled at ${nextRetryAtLog}, reason=${reason}`,
           );
           break;
         }
diff --git a/src/index.ts b/src/index.ts
index fe7e6c0..fab33da 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -164,6 +164,41 @@ function saveAgentIdentityMap(
   }
 }
 
+type StoredIdentityFile = { userId?: string; agentId?: string };
+
+function readStoredIdentityFile(identityPath: string): StoredIdentityFile {
+  try {
+    const raw = readFileSync(identityPath, "utf-8");
+    const parsed = JSON.parse(raw) as unknown;
+    if (parsed && typeof parsed === "object" && !Array.isArray(parsed)) {
+      const o = parsed as Record<string, unknown>;
+      return {
+        userId: typeof o.userId === "string" ? o.userId : undefined,
+        agentId: typeof o.agentId === "string" ? o.agentId : undefined,
+      };
+    }
+  } catch {
+    /* missing or invalid */
+  }
+  return {};
+}
+
+function writeStoredIdentityFile(
+  powermemDir: string,
+  identityPath: string,
+  data: { userId: string; agentId: string },
+  logger: Logger,
+): boolean {
+  try {
+    mkdirSync(powermemDir, { recursive: true });
+    writeFileSync(identityPath, JSON.stringify(data, null, 2), "utf-8");
+    return true;
+  } catch (err) {
+    logger.warn?.(`memory-powermem: failed to write identity.json: ${String(err)}`);
+    return false;
+  }
+}
+
 type MemoryClient = {
   health: () => Promise<{ status: string; error?: string }>;
   add: (
@@ -266,7 +301,9 @@ const memoryPlugin = {
         : undefined;
 
     const defaultIdentity: AgentIdentity = { userId, agentId };
-    const agentIdentityPath = join(stateDir, "powermem", "agent-identities.json");
+    const powermemDir = join(stateDir, "powermem");
+    const identityPath = join(powermemDir, "identity.json");
+    const agentIdentityPath = join(powermemDir, "agent-identities.json");
     const agentIdentityMap = loadAgentIdentityMap(agentIdentityPath, api.logger);
     let defaultIdentityBound = agentIdentityMap.size > 0;
 
@@ -1391,6 +1428,218 @@ const memoryPlugin = {
           .command("ltm")
           .description("PowerMem long-term memory plugin commands");
 
+        const identityCmd = ltm
+          .command("identity")
+          .description(
+            "Read or edit <stateDir>/powermem/identity.json (default user/agent ids when config uses auto)",
+          );
+
+        identityCmd
+          .command("show")
+          .description("Print identity.json path and stored userId / agentId")
+          .option("--json", "Machine-readable JSON only")
+          .action((...args: unknown[]) => {
+            const opts = (args[0] ?? {}) as { json?: boolean };
+            const stored = readStoredIdentityFile(identityPath);
+            if (opts.json === true) {
+              console.log(JSON.stringify({ path: identityPath, ...stored }, null, 2));
+              return;
+            }
+            console.log(`path: ${identityPath}`);
+            console.log(`userId: ${stored.userId ?? "(unset)"}`);
+            console.log(`agentId: ${stored.agentId ?? "(unset)"}`);
+          });
+
+        identityCmd
+          .command("set")
+          .description("Set userId and/or agentId in identity.json (omitted fields keep existing or auto-generate)")
+          .option("--user-id <id>", "PowerMem user id")
+          .option("--agent-id <id>", "PowerMem agent id")
+          .action(async (...args: unknown[]) => {
+            const opts = (args[0] ?? {}) as { userId?: string; agentId?: string };
+            const rawUser = opts.userId?.trim();
+            const rawAgent = opts.agentId?.trim();
+            if (!rawUser && !rawAgent) {
+              console.error("Provide at least one of --user-id or --agent-id.");
+              process.exitCode = 1;
+              return;
+            }
+            const stored = readStoredIdentityFile(identityPath);
+            const nextUserId =
+              rawUser ?? stored.userId?.trim() ?? `user-${randomUUID()}`;
+            const nextAgentId =
+              rawAgent ?? stored.agentId?.trim() ?? `agent-${randomUUID()}`;
+            if (
+              !writeStoredIdentityFile(powermemDir, identityPath, { userId: nextUserId, agentId: nextAgentId }, api.logger)
+            ) {
+              process.exitCode = 1;
+              return;
+            }
+            console.log(`Updated ${identityPath}`);
+            console.log(JSON.stringify({ userId: nextUserId, agentId: nextAgentId }, null, 2));
+          });
+
+        const agentIdentitiesCmd = ltm
+          .command("agent-identities")
+          .description(
+            "Read or edit <stateDir>/powermem/agent-identities.json (per OpenClaw agent → PowerMem ids)",
+          );
+
+        agentIdentitiesCmd
+          .command("show")
+          .description("List OpenClaw agent keys and their PowerMem userId / agentId")
+          .option("--json", "Machine-readable JSON only")
+          .action((...args: unknown[]) => {
+            const opts = (args[0] ?? {}) as { json?: boolean };
+            const map = loadAgentIdentityMap(agentIdentityPath, api.logger);
+            const agents: Record<string, AgentIdentity> = {};
+            for (const [k, v] of map.entries()) {
+              agents[k] = v;
+            }
+            if (opts.json === true) {
+              console.log(JSON.stringify({ path: agentIdentityPath, agents }, null, 2));
+              return;
+            }
+            console.log(`path: ${agentIdentityPath}`);
+            const keys = Object.keys(agents);
+            if (keys.length === 0) {
+              console.log("(no entries)");
+              return;
+            }
+            for (const key of keys) {
+              const v = agents[key];
+              console.log(`${key}\tuserId=${v.userId}\tagentId=${v.agentId}`);
+            }
+          });
+
+        agentIdentitiesCmd
+          .command("set")
+          .description(
+            "Set PowerMem userId and/or agentId for one OpenClaw agent key (creates entry only if both ids are provided when missing)",
+          )
+          .option("--agent <key>", "OpenClaw agent id (JSON object key)", "")
+          .option("--user-id <id>", "PowerMem user id")
+          .option("--agent-id <id>", "PowerMem agent id")
+          .action(async (...args: unknown[]) => {
+            const opts = (args[0] ?? {}) as {
+              agent?: string;
+              userId?: string;
+              agentId?: string;
+            };
+            const key = opts.agent?.trim();
+            const rawUser = opts.userId?.trim();
+            const rawAgent = opts.agentId?.trim();
+            if (!key) {
+              console.error("Missing --agent.");
+              process.exitCode = 1;
+              return;
+            }
+            if (!rawUser && !rawAgent) {
+              console.error("Provide at least one of --user-id or --agent-id.");
+              process.exitCode = 1;
+              return;
+            }
+            const map = loadAgentIdentityMap(agentIdentityPath, api.logger);
+            const existing = map.get(key);
+            if (!existing) {
+              if (!rawUser || !rawAgent) {
+                console.error(
+                  "No existing entry for this --agent; provide both --user-id and --agent-id to create one.",
+                );
+                process.exitCode = 1;
+                return;
+              }
+              map.set(key, { userId: rawUser, agentId: rawAgent });
+            } else {
+              map.set(key, {
+                userId: rawUser ?? existing.userId,
+                agentId: rawAgent ?? existing.agentId,
+              });
+            }
+            saveAgentIdentityMap(agentIdentityPath, map, api.logger);
+            const updated = map.get(key)!;
+            console.log(`Updated ${agentIdentityPath} entry "${key}"`);
+            console.log(JSON.stringify(updated, null, 2));
+          });
+
+        ltm
+          .command("sync-user-id")
+          .description(
+            "Use one userId in identity.json and in every agent-identities.json entry (PowerMem agent ids unchanged)",
+          )
+          .option("--user-id <id>", "Use this user id everywhere")
+          .option(
+            "--from <mode>",
+            "Where to read the canonical user id when --user-id is omitted: identity | agent",
+            "identity",
+          )
+          .option("--agent <key>", "OpenClaw agent key when --from agent")
+          .action(async (...args: unknown[]) => {
+            const opts = (args[0] ?? {}) as {
+              userId?: string;
+              from?: string;
+              agent?: string;
+            };
+            const explicit = opts.userId?.trim();
+            const from = (opts.from ?? "identity").trim().toLowerCase();
+            let canonical = explicit;
+            if (!canonical) {
+              if (from === "identity") {
+                canonical = readStoredIdentityFile(identityPath).userId?.trim();
+              } else if (from === "agent") {
+                const agentKey = opts.agent?.trim();
+                if (!agentKey) {
+                  console.error("With --from agent, pass --agent <OpenClaw agent key>.");
+                  process.exitCode = 1;
+                  return;
+                }
+                const map = loadAgentIdentityMap(agentIdentityPath, api.logger);
+                canonical = map.get(agentKey)?.userId?.trim();
+              } else {
+                console.error('--from must be "identity" or "agent".');
+                process.exitCode = 1;
+                return;
+              }
+            }
+            if (!canonical) {
+              console.error(
+                "Could not resolve user id: use --user-id, or ensure identity.json / the chosen agent entry has userId.",
+              );
+              process.exitCode = 1;
+              return;
+            }
+
+            const storedId = readStoredIdentityFile(identityPath);
+            const nextAgentIdForFile =
+              storedId.agentId?.trim() ?? `agent-${randomUUID()}`;
+            if (
+              !writeStoredIdentityFile(
+                powermemDir,
+                identityPath,
+                { userId: canonical, agentId: nextAgentIdForFile },
+                api.logger,
+              )
+            ) {
+              process.exitCode = 1;
+              return;
+            }
+
+            const map = loadAgentIdentityMap(agentIdentityPath, api.logger);
+            if (map.size === 0) {
+              console.log(
+                `Set identity.json userId to ${canonical} (${agentIdentityPath} has no entries to update).`,
+              );
+              return;
+            }
+            for (const [k, v] of map.entries()) {
+              map.set(k, { userId: canonical, agentId: v.agentId });
+            }
+            saveAgentIdentityMap(agentIdentityPath, map, api.logger);
+            console.log(
+              `Synced userId "${canonical}" to identity.json and ${map.size} agent-identities entr${map.size === 1 ? "y" : "ies"}.`,
+            );
+          });
+
         ltm
           .command("search")
           .description("Search memories")