diff --git a/extensions/browser/src/browser-tool.actions.ts b/extensions/browser/src/browser-tool.actions.ts
index bbd92145c04..dba6595f823 100644
--- a/extensions/browser/src/browser-tool.actions.ts
+++ b/extensions/browser/src/browser-tool.actions.ts
@@ -1,4 +1,5 @@
 import type { AgentToolResult } from "@mariozechner/pi-agent-core";
+import { normalizeOptionalString, readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import {
   DEFAULT_AI_SNAPSHOT_MAX_CHARS,
   browserAct,
@@ -106,7 +107,7 @@ function formatConsoleToolResult(result: {
     content: [{ type: "text" as const, text: wrapped.wrappedText }],
     details: {
       ...wrapped.safeDetails,
-      targetId: typeof result.targetId === "string" ? result.targetId : undefined,
+      targetId: readStringValue(result.targetId),
       messageCount: Array.isArray(result.messages) ? result.messages.length : undefined,
     },
   };
@@ -133,7 +134,7 @@ function isChromeStaleTargetError(profile: string | undefined, err: unknown): bo
 function stripTargetIdFromActRequest(
   request: Parameters<typeof browserAct>[1],
 ): Parameters<typeof browserAct>[1] | null {
-  const targetId = typeof request.targetId === "string" ? request.targetId.trim() : undefined;
+  const targetId = normalizeOptionalString(request.targetId);
   if (!targetId) {
     return null;
   }
@@ -194,7 +195,7 @@ export async function executeSnapshotAction(params: {
   const refs: "aria" | "role" | undefined =
     input.refs === "aria" || input.refs === "role" ? input.refs : undefined;
   const hasMaxChars = Object.hasOwn(input, "maxChars");
-  const targetId = typeof input.targetId === "string" ? input.targetId.trim() : undefined;
+  const targetId = normalizeOptionalString(input.targetId);
   const limit =
     typeof input.limit === "number" && Number.isFinite(input.limit) ? input.limit : undefined;
   const maxChars =
@@ -205,8 +206,8 @@ export async function executeSnapshotAction(params: {
   const compact = typeof input.compact === "boolean" ? input.compact : undefined;
   const depth =
     typeof input.depth === "number" && Number.isFinite(input.depth) ? input.depth : undefined;
-  const selector = typeof input.selector === "string" ? input.selector.trim() : undefined;
-  const frame = typeof input.frame === "string" ? input.frame.trim() : undefined;
+  const selector = normalizeOptionalString(input.selector);
+  const frame = normalizeOptionalString(input.frame);
   const resolvedMaxChars =
     format === "ai"
       ? hasMaxChars
@@ -314,8 +315,8 @@ export async function executeConsoleAction(params: {
   proxyRequest: BrowserProxyRequest | null;
 }): Promise<AgentToolResult<unknown>> {
   const { input, baseUrl, profile, proxyRequest } = params;
-  const level = typeof input.level === "string" ? input.level.trim() : undefined;
-  const targetId = typeof input.targetId === "string" ? input.targetId.trim() : undefined;
+  const level = normalizeOptionalString(input.level);
+  const targetId = normalizeOptionalString(input.targetId);
   if (proxyRequest) {
     const result = (await proxyRequest({
       method: "GET",
diff --git a/extensions/browser/src/browser-tool.ts b/extensions/browser/src/browser-tool.ts
index cf0792fe316..0768763ea34 100644
--- a/extensions/browser/src/browser-tool.ts
+++ b/extensions/browser/src/browser-tool.ts
@@ -1,4 +1,5 @@
 import crypto from "node:crypto";
+import { normalizeOptionalString, readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import {
   executeActAction,
   executeConsoleAction,
@@ -114,7 +115,7 @@ export const __testing = {
 };
 
 function readOptionalTargetAndTimeout(params: Record<string, unknown>) {
-  const targetId = typeof params.targetId === "string" ? params.targetId.trim() : undefined;
+  const targetId = normalizeOptionalString(params.targetId);
   const timeoutMs =
     typeof params.timeoutMs === "number" && Number.isFinite(params.timeoutMs)
       ? params.timeoutMs
@@ -647,7 +648,7 @@ export function createBrowserTool(opts?: {
             proxyRequest,
           });
         case "pdf": {
-          const targetId = typeof params.targetId === "string" ? params.targetId.trim() : undefined;
+          const targetId = normalizeOptionalString(params.targetId);
           const result = proxyRequest
             ? ((await proxyRequest({
                 method: "POST",
@@ -709,7 +710,7 @@ export function createBrowserTool(opts?: {
         }
         case "dialog": {
           const accept = Boolean(params.accept);
-          const promptText = typeof params.promptText === "string" ? params.promptText : undefined;
+          const promptText = readStringValue(params.promptText);
           const { targetId, timeoutMs } = readOptionalTargetAndTimeout(params);
           if (proxyRequest) {
             const result = await proxyRequest({
diff --git a/extensions/browser/src/browser/chrome-mcp.ts b/extensions/browser/src/browser/chrome-mcp.ts
index 97b6246d1dc..5d8b765deed 100644
--- a/extensions/browser/src/browser/chrome-mcp.ts
+++ b/extensions/browser/src/browser/chrome-mcp.ts
@@ -4,6 +4,7 @@ import os from "node:os";
 import path from "node:path";
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";
+import { readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import { asRecord } from "../record-shared.js";
 import type { ChromeMcpSnapshotNode } from "./chrome-mcp.snapshot.js";
 import type { BrowserTab } from "./client.js";
@@ -58,7 +59,7 @@ function asPages(value: unknown): ChromeMcpStructuredPage[] {
     }
     out.push({
       id: record.id,
-      url: typeof record.url === "string" ? record.url : undefined,
+      url: readStringValue(record.url),
       selected: record.selected === true,
     });
   }
diff --git a/extensions/browser/src/browser/pw-tools-core.storage.ts b/extensions/browser/src/browser/pw-tools-core.storage.ts
index 8126d66fa71..3ba77bf9735 100644
--- a/extensions/browser/src/browser/pw-tools-core.storage.ts
+++ b/extensions/browser/src/browser/pw-tools-core.storage.ts
@@ -1,3 +1,4 @@
+import { readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import { ensurePageState, getPageForTargetId } from "./pw-session.js";
 
 export async function cookiesGetViaPlaywright(opts: {
@@ -63,7 +64,7 @@ export async function storageGetViaPlaywright(opts: {
   const page = await getPageForTargetId(opts);
   ensurePageState(page);
   const kind = opts.kind;
-  const key = typeof opts.key === "string" ? opts.key : undefined;
+  const key = readStringValue(opts.key);
   const values = await page.evaluate(
     ({ kind: kind2, key: key2 }) => {
       const store = kind2 === "session" ? window.sessionStorage : window.localStorage;
diff --git a/extensions/browser/src/browser/request-policy.ts b/extensions/browser/src/browser/request-policy.ts
index 6288c6b11a6..532e129a543 100644
--- a/extensions/browser/src/browser/request-policy.ts
+++ b/extensions/browser/src/browser/request-policy.ts
@@ -1,3 +1,5 @@
+import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
+
 type BrowserRequestProfileParams = {
   query?: Record<string, unknown>;
   body?: unknown;
@@ -30,20 +32,16 @@ export function isPersistentBrowserProfileMutation(method: string, path: string)
 export function resolveRequestedBrowserProfile(
   params: BrowserRequestProfileParams,
 ): string | undefined {
-  const queryProfile =
-    typeof params.query?.profile === "string" ? params.query.profile.trim() : undefined;
+  const queryProfile = normalizeOptionalString(params.query?.profile);
   if (queryProfile) {
     return queryProfile;
   }
   if (params.body && typeof params.body === "object") {
     const bodyProfile =
-      "profile" in params.body && typeof params.body.profile === "string"
-        ? params.body.profile.trim()
-        : undefined;
+      "profile" in params.body ? normalizeOptionalString(params.body.profile) : undefined;
     if (bodyProfile) {
       return bodyProfile;
     }
   }
-  const explicitProfile = typeof params.profile === "string" ? params.profile.trim() : undefined;
-  return explicitProfile || undefined;
+  return normalizeOptionalString(params.profile);
 }
diff --git a/extensions/browser/src/browser/routes/agent.snapshot.plan.ts b/extensions/browser/src/browser/routes/agent.snapshot.plan.ts
index 6c913400d90..3ca6c57d4ba 100644
--- a/extensions/browser/src/browser/routes/agent.snapshot.plan.ts
+++ b/extensions/browser/src/browser/routes/agent.snapshot.plan.ts
@@ -1,3 +1,4 @@
+import { readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import type { ResolvedBrowserProfile } from "../config.js";
 import {
   DEFAULT_AI_SNAPSHOT_EFFICIENT_DEPTH,
@@ -41,14 +42,13 @@ export function resolveSnapshotPlan(params: {
     explicitFormat,
     mode,
   });
-  const limitRaw = typeof params.query.limit === "string" ? Number(params.query.limit) : undefined;
+  const limitRaw = readStringValue(params.query.limit);
   const hasMaxChars = Object.hasOwn(params.query, "maxChars");
-  const maxCharsRaw =
-    typeof params.query.maxChars === "string" ? Number(params.query.maxChars) : undefined;
-  const limit = Number.isFinite(limitRaw) ? limitRaw : undefined;
+  const maxCharsRaw = readStringValue(params.query.maxChars);
+  const limit = Number.isFinite(Number(limitRaw)) ? Number(limitRaw) : undefined;
   const maxChars =
-    typeof maxCharsRaw === "number" && Number.isFinite(maxCharsRaw) && maxCharsRaw > 0
-      ? Math.floor(maxCharsRaw)
+    Number.isFinite(Number(maxCharsRaw)) && Number(maxCharsRaw) > 0
+      ? Math.floor(Number(maxCharsRaw))
       : undefined;
   const resolvedMaxChars =
     format === "ai"
diff --git a/extensions/browser/src/browser/routes/agent.storage.ts b/extensions/browser/src/browser/routes/agent.storage.ts
index 86830ab27ce..0a7de56aa8f 100644
--- a/extensions/browser/src/browser/routes/agent.storage.ts
+++ b/extensions/browser/src/browser/routes/agent.storage.ts
@@ -1,3 +1,4 @@
+import { readStringValue } from "openclaw/plugin-sdk/text-runtime";
 import type { BrowserRouteContext } from "../server-context.js";
 import {
   readBody,
@@ -292,7 +293,7 @@ export function registerBrowserAgentStorageRoutes(
     const targetId = resolveTargetIdFromBody(body);
     const clear = toBoolean(body.clear) ?? false;
     const username = toStringOrEmpty(body.username) || undefined;
-    const password = typeof body.password === "string" ? body.password : undefined;
+    const password = readStringValue(body.password);
 
     await withPlaywrightRouteContext({
       req,
diff --git a/extensions/browser/src/cli/browser-cli-actions-input/register.files-downloads.ts b/extensions/browser/src/cli/browser-cli-actions-input/register.files-downloads.ts
index b570abfb02e..ed131b83082 100644
--- a/extensions/browser/src/cli/browser-cli-actions-input/register.files-downloads.ts
+++ b/extensions/browser/src/cli/browser-cli-actions-input/register.files-downloads.ts
@@ -1,4 +1,5 @@
 import type { Command } from "commander";
+import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
 import { callBrowserRequest, type BrowserParentOpts } from "../browser-cli-shared.js";
 import {
   danger,
@@ -57,8 +58,7 @@ export function registerBrowserFilesAndDownloadsCommands(
 ) {
   const resolveTimeoutAndTarget = (opts: { timeoutMs?: unknown; targetId?: unknown }) => {
     const timeoutMs = Number.isFinite(opts.timeoutMs) ? Number(opts.timeoutMs) : undefined;
-    const targetId =
-      typeof opts.targetId === "string" ? opts.targetId.trim() || undefined : undefined;
+    const targetId = normalizeOptionalString(opts.targetId);
     return { timeoutMs, targetId };
   };
 
diff --git a/extensions/browser/src/cli/browser-cli-debug.ts b/extensions/browser/src/cli/browser-cli-debug.ts
index 7438480bdfa..d1dadb3df66 100644
--- a/extensions/browser/src/cli/browser-cli-debug.ts
+++ b/extensions/browser/src/cli/browser-cli-debug.ts
@@ -1,4 +1,5 @@
 import type { Command } from "commander";
+import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
 import { runCommandWithRuntime } from "../core-api.js";
 import { callBrowserRequest, type BrowserParentOpts } from "./browser-cli-shared.js";
 import { danger, defaultRuntime, shortenHomePath } from "./core-api.js";
@@ -59,8 +60,8 @@ function resolveDebugQuery(params: {
   filter?: unknown;
 }) {
   return {
-    targetId: typeof params.targetId === "string" ? params.targetId.trim() || undefined : undefined,
-    filter: typeof params.filter === "string" ? params.filter.trim() || undefined : undefined,
+    targetId: normalizeOptionalString(params.targetId),
+    filter: normalizeOptionalString(params.filter),
     clear: Boolean(params.clear),
     profile: params.profile,
   };
diff --git a/extensions/browser/src/doctor-browser.ts b/extensions/browser/src/doctor-browser.ts
index 798f939ee61..ccef7b6021b 100644
--- a/extensions/browser/src/doctor-browser.ts
+++ b/extensions/browser/src/doctor-browser.ts
@@ -1,4 +1,5 @@
 import { note } from "openclaw/plugin-sdk/browser-setup-tools";
+import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
 import {
   parseBrowserMajorVersion,
   readBrowserVersion,
@@ -26,8 +27,7 @@ function collectChromeMcpProfiles(cfg: OpenClawConfig): ExistingSessionProfile[]
   }
 
   const profiles = new Map<string, ExistingSessionProfile>();
-  const defaultProfile =
-    typeof browser.defaultProfile === "string" ? browser.defaultProfile.trim() : "";
+  const defaultProfile = normalizeOptionalString(browser.defaultProfile) ?? "";
   if (defaultProfile === "user") {
     profiles.set("user", { name: "user" });
   }
@@ -39,11 +39,12 @@ function collectChromeMcpProfiles(cfg: OpenClawConfig): ExistingSessionProfile[]
 
   for (const [profileName, rawProfile] of Object.entries(configuredProfiles)) {
     const profile = asRecord(rawProfile);
-    const driver = typeof profile?.driver === "string" ? profile.driver.trim() : "";
+    const driver = normalizeOptionalString(profile?.driver) ?? "";
     if (driver === "existing-session") {
-      const userDataDir =
-        typeof profile?.userDataDir === "string" ? profile.userDataDir.trim() : undefined;
-      profiles.set(profileName, { name: profileName, userDataDir: userDataDir || undefined });
+      profiles.set(profileName, {
+        name: profileName,
+        userDataDir: normalizeOptionalString(profile?.userDataDir),
+      });
     }
   }