diff --git a/extensions/comfy/workflow-runtime.ts b/extensions/comfy/workflow-runtime.ts
index bde54fc5729..44aec79f398 100644
--- a/extensions/comfy/workflow-runtime.ts
+++ b/extensions/comfy/workflow-runtime.ts
@@ -314,7 +314,7 @@ async function uploadInputImage(params: {
   form.set(
     "image",
     new Blob([toBlobBytes(params.image.buffer)], { type: params.image.mimeType }),
-    params.image.fileName?.trim() ||
+    normalizeOptionalString(params.image.fileName) ||
       `input.${inferFileExtension({ mimeType: params.image.mimeType })}`,
   );
   form.set("type", "input");
@@ -337,7 +337,8 @@ async function uploadInputImage(params: {
     errorPrefix: "Comfy image upload failed",
   });
 
-  const uploadedName = payload.filename?.trim() || payload.name?.trim();
+  const uploadedName =
+    normalizeOptionalString(payload.filename) || normalizeOptionalString(payload.name);
   if (!uploadedName) {
     throw new Error("Comfy image upload response missing filename");
   }
@@ -473,15 +474,16 @@ async function downloadOutputFile(params: {
   mode: ComfyMode;
   capability: ComfyCapability;
 }): Promise<{ buffer: Buffer; mimeType: string }> {
-  const fileName = params.file.filename?.trim() || params.file.name?.trim();
+  const fileName =
+    normalizeOptionalString(params.file.filename) || normalizeOptionalString(params.file.name);
   if (!fileName) {
     throw new Error("Comfy output entry missing filename");
   }
 
   const query = new URLSearchParams({
     filename: fileName,
-    subfolder: params.file.subfolder?.trim() ?? "",
-    type: params.file.type?.trim() ?? "output",
+    subfolder: normalizeOptionalString(params.file.subfolder) ?? "",
+    type: normalizeOptionalString(params.file.type) ?? "output",
   });
   const viewPath = params.mode === "cloud" ? "/api/view" : "/view";
   const auditContext = `comfy-${params.capability}-download`;
@@ -504,7 +506,7 @@ async function downloadOutputFile(params: {
       params.mode === "cloud" &&
       [301, 302, 303, 307, 308].includes(firstResponse.response.status)
     ) {
-      const redirectUrl = firstResponse.response.headers.get("location")?.trim();
+      const redirectUrl = normalizeOptionalString(firstResponse.response.headers.get("location"));
       if (!redirectUrl) {
         throw new Error("Comfy cloud output redirect missing location header");
       }
@@ -520,7 +522,8 @@ async function downloadOutputFile(params: {
       try {
         await assertOkOrThrowHttpError(redirected.response, "Comfy output download failed");
         const mimeType =
-          redirected.response.headers.get("content-type")?.trim() || "application/octet-stream";
+          normalizeOptionalString(redirected.response.headers.get("content-type")) ||
+          "application/octet-stream";
         return {
           buffer: Buffer.from(await redirected.response.arrayBuffer()),
           mimeType,
@@ -532,7 +535,8 @@ async function downloadOutputFile(params: {
 
     await assertOkOrThrowHttpError(firstResponse.response, "Comfy output download failed");
     const mimeType =
-      firstResponse.response.headers.get("content-type")?.trim() || "application/octet-stream";
+      normalizeOptionalString(firstResponse.response.headers.get("content-type")) ||
+      "application/octet-stream";
     return {
       buffer: Buffer.from(await firstResponse.response.arrayBuffer()),
       mimeType,
@@ -592,7 +596,7 @@ export async function runComfyWorkflow(params: {
     readConfigInteger(capabilityConfig, "pollIntervalMs") ?? DEFAULT_POLL_INTERVAL_MS;
   const timeoutMs =
     readConfigInteger(capabilityConfig, "timeoutMs") ?? params.timeoutMs ?? DEFAULT_TIMEOUT_MS;
-  const providerModel = params.model?.trim() || DEFAULT_COMFY_MODEL;
+  const providerModel = normalizeOptionalString(params.model) || DEFAULT_COMFY_MODEL;
 
   setWorkflowInput({
     workflow,
@@ -687,7 +691,7 @@ export async function runComfyWorkflow(params: {
     errorPrefix: "Comfy workflow submit failed",
   });
 
-  const promptId = promptResponse.prompt_id?.trim();
+  const promptId = normalizeOptionalString(promptResponse.prompt_id);
   if (!promptId) {
     throw new Error("Comfy workflow submit response missing prompt_id");
   }
@@ -755,7 +759,8 @@ export async function runComfyWorkflow(params: {
       capability: params.capability,
     });
     assetIndex += 1;
-    const originalName = output.file.filename?.trim() || output.file.name?.trim();
+    const originalName =
+      normalizeOptionalString(output.file.filename) || normalizeOptionalString(output.file.name);
     assets.push({
       buffer: downloaded.buffer,
       mimeType: downloaded.mimeType,
diff --git a/extensions/feishu/src/comment-shared.ts b/extensions/feishu/src/comment-shared.ts
index 8497e78b634..d2139aab9de 100644
--- a/extensions/feishu/src/comment-shared.ts
+++ b/extensions/feishu/src/comment-shared.ts
@@ -32,36 +32,32 @@ export function extractCommentElementText(element: unknown): string | undefined
   if (!isRecord(element)) {
     return undefined;
   }
-  const type = readString(element.type)?.trim();
+  const type = normalizeString(element.type);
   if (type === "text_run" && isRecord(element.text_run)) {
-    return (
-      readString(element.text_run.content)?.trim() ||
-      readString(element.text_run.text)?.trim() ||
-      undefined
-    );
+    return normalizeString(element.text_run.content) || normalizeString(element.text_run.text);
   }
   if (type === "mention") {
     const mention = isRecord(element.mention) ? element.mention : undefined;
     const mentionName =
-      readString(mention?.name)?.trim() ||
-      readString(mention?.display_name)?.trim() ||
-      readString(element.name)?.trim();
+      normalizeString(mention?.name) ||
+      normalizeString(mention?.display_name) ||
+      normalizeString(element.name);
     return mentionName ? `@${mentionName}` : "@mention";
   }
   if (type === "docs_link") {
     const docsLink = isRecord(element.docs_link) ? element.docs_link : undefined;
     return (
-      readString(docsLink?.text)?.trim() ||
-      readString(docsLink?.url)?.trim() ||
-      readString(element.text)?.trim() ||
-      readString(element.url)?.trim() ||
+      normalizeString(docsLink?.text) ||
+      normalizeString(docsLink?.url) ||
+      normalizeString(element.text) ||
+      normalizeString(element.url) ||
       undefined
     );
   }
   return (
-    readString(element.text)?.trim() ||
-    readString(element.content)?.trim() ||
-    readString(element.name)?.trim() ||
+    normalizeString(element.text) ||
+    normalizeString(element.content) ||
+    normalizeString(element.name) ||
     undefined
   );
 }
diff --git a/extensions/irc/src/setup-surface.ts b/extensions/irc/src/setup-surface.ts
index 8ce001d1aaa..65cc35c4ec1 100644
--- a/extensions/irc/src/setup-surface.ts
+++ b/extensions/irc/src/setup-surface.ts
@@ -11,6 +11,10 @@ import {
   formatDocsLink,
   setSetupChannelEnabled,
 } from "openclaw/plugin-sdk/setup";
+import {
+  normalizeOptionalString,
+  normalizeStringifiedOptionalString,
+} from "openclaw/plugin-sdk/text-runtime";
 import { resolveDefaultIrcAccountId, resolveIrcAccount } from "./accounts.js";
 import {
   isChannelTarget,
@@ -96,7 +100,7 @@ async function promptIrcNickServConfig(params: {
     await params.prompter.text({
       message: "NickServ service nick",
       initialValue: existing?.service || "NickServ",
-      validate: (value) => (String(value ?? "").trim() ? undefined : "Required"),
+      validate: (value) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
     }),
   ).trim();
 
@@ -139,7 +143,7 @@ async function promptIrcNickServConfig(params: {
             (params.accountId === DEFAULT_ACCOUNT_ID
               ? process.env.IRC_NICKSERV_REGISTER_EMAIL
               : undefined),
-          validate: (value) => (String(value ?? "").trim() ? undefined : "Required"),
+          validate: (value) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
         }),
       ).trim()
     : undefined;
@@ -199,8 +203,8 @@ export const ircSetupWizard: ChannelSetupWizard = {
   prepare: async ({ cfg, accountId, credentialValues, prompter }) => {
     const resolved = resolveIrcAccount({ cfg: cfg as CoreConfig, accountId });
     const isDefaultAccount = accountId === DEFAULT_ACCOUNT_ID;
-    const envHost = isDefaultAccount ? process.env.IRC_HOST?.trim() : "";
-    const envNick = isDefaultAccount ? process.env.IRC_NICK?.trim() : "";
+    const envHost = isDefaultAccount ? (normalizeOptionalString(process.env.IRC_HOST) ?? "") : "";
+    const envNick = isDefaultAccount ? (normalizeOptionalString(process.env.IRC_NICK) ?? "") : "";
     const envReady = Boolean(envHost && envNick && !resolved.config.host && !resolved.config.nick);
 
     if (envReady) {
@@ -243,8 +247,8 @@ export const ircSetupWizard: ChannelSetupWizard = {
       currentValue: ({ cfg, accountId }) =>
         resolveIrcAccount({ cfg: cfg as CoreConfig, accountId }).config.host || undefined,
       shouldPrompt: ({ credentialValues }) => credentialValues[USE_ENV_FLAG] !== "1",
-      validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-      normalizeValue: ({ value }) => String(value).trim(),
+      validate: ({ value }) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
+      normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
       applySet: async ({ cfg, accountId, value }) =>
         updateIrcAccountConfig(cfg as CoreConfig, accountId, {
           enabled: true,
@@ -264,7 +268,7 @@ export const ircSetupWizard: ChannelSetupWizard = {
         return String(defaultPort);
       },
       validate: ({ value }) => {
-        const parsed = Number.parseInt(String(value ?? "").trim(), 10);
+        const parsed = Number.parseInt(normalizeStringifiedOptionalString(value) ?? "", 10);
         return Number.isFinite(parsed) && parsed >= 1 && parsed <= 65535
           ? undefined
           : "Use a port between 1 and 65535";
@@ -282,8 +286,8 @@ export const ircSetupWizard: ChannelSetupWizard = {
       currentValue: ({ cfg, accountId }) =>
         resolveIrcAccount({ cfg: cfg as CoreConfig, accountId }).config.nick || undefined,
       shouldPrompt: ({ credentialValues }) => credentialValues[USE_ENV_FLAG] !== "1",
-      validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-      normalizeValue: ({ value }) => String(value).trim(),
+      validate: ({ value }) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
+      normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
       applySet: async ({ cfg, accountId, value }) =>
         updateIrcAccountConfig(cfg as CoreConfig, accountId, {
           enabled: true,
@@ -300,8 +304,8 @@ export const ircSetupWizard: ChannelSetupWizard = {
         resolveIrcAccount({ cfg: cfg as CoreConfig, accountId }).config.username ||
         credentialValues.token ||
         "openclaw",
-      validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-      normalizeValue: ({ value }) => String(value).trim(),
+      validate: ({ value }) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
+      normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
       applySet: async ({ cfg, accountId, value }) =>
         updateIrcAccountConfig(cfg as CoreConfig, accountId, {
           enabled: true,
@@ -316,8 +320,8 @@ export const ircSetupWizard: ChannelSetupWizard = {
       shouldPrompt: ({ credentialValues }) => credentialValues[USE_ENV_FLAG] !== "1",
       initialValue: ({ cfg, accountId }) =>
         resolveIrcAccount({ cfg: cfg as CoreConfig, accountId }).config.realname || "OpenClaw",
-      validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-      normalizeValue: ({ value }) => String(value).trim(),
+      validate: ({ value }) => (normalizeStringifiedOptionalString(value) ? undefined : "Required"),
+      normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
       applySet: async ({ cfg, accountId, value }) =>
         updateIrcAccountConfig(cfg as CoreConfig, accountId, {
           enabled: true,
diff --git a/extensions/tlon/src/setup-core.ts b/extensions/tlon/src/setup-core.ts
index 118937f458e..f23fbddbd26 100644
--- a/extensions/tlon/src/setup-core.ts
+++ b/extensions/tlon/src/setup-core.ts
@@ -10,6 +10,10 @@ import {
   type ChannelSetupWizard,
   type OpenClawConfig,
 } from "openclaw/plugin-sdk/setup";
+import {
+  normalizeOptionalString,
+  normalizeStringifiedOptionalString,
+} from "openclaw/plugin-sdk/text-runtime";
 import { buildTlonAccountFields } from "./account-fields.js";
 import { normalizeShip } from "./targets.js";
 import { listTlonAccountIds, resolveTlonAccount, type TlonResolvedAccount } from "./types.js";
@@ -78,8 +82,10 @@ export function createTlonSetupWizardBase(params: TlonSetupWizardBaseParams): Ch
         message: "Ship name",
         placeholder: "~sampel-palnet",
         currentValue: ({ cfg, accountId }) => resolveTlonAccount(cfg, accountId).ship ?? undefined,
-        validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-        normalizeValue: ({ value }) => normalizeShip(String(value).trim()),
+        validate: ({ value }) =>
+          normalizeStringifiedOptionalString(value) ? undefined : "Required",
+        normalizeValue: ({ value }) =>
+          normalizeShip(normalizeStringifiedOptionalString(value) ?? ""),
         applySet: async ({ cfg, accountId, value }) =>
           applyTlonSetupConfig({
             cfg,
@@ -99,7 +105,7 @@ export function createTlonSetupWizardBase(params: TlonSetupWizardBaseParams): Ch
           }
           return undefined;
         },
-        normalizeValue: ({ value }) => String(value).trim(),
+        normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
         applySet: async ({ cfg, accountId, value }) =>
           applyTlonSetupConfig({
             cfg,
@@ -112,8 +118,9 @@ export function createTlonSetupWizardBase(params: TlonSetupWizardBaseParams): Ch
         message: "Login code",
         placeholder: "lidlut-tabwed-pillex-ridrup",
         currentValue: ({ cfg, accountId }) => resolveTlonAccount(cfg, accountId).code ?? undefined,
-        validate: ({ value }) => (String(value ?? "").trim() ? undefined : "Required"),
-        normalizeValue: ({ value }) => String(value).trim(),
+        validate: ({ value }) =>
+          normalizeStringifiedOptionalString(value) ? undefined : "Required",
+        normalizeValue: ({ value }) => normalizeStringifiedOptionalString(value) ?? "",
         applySet: async ({ cfg, accountId, value }) =>
           applyTlonSetupConfig({
             cfg,
@@ -206,9 +213,9 @@ export const tlonSetupAdapter: ChannelSetupAdapter = {
   validateInput: createSetupInputPresenceValidator({
     validate: ({ cfg, accountId, input }) => {
       const resolved = resolveTlonAccount(cfg, accountId ?? undefined);
-      const ship = input.ship?.trim() || resolved.ship;
-      const url = input.url?.trim() || resolved.url;
-      const code = input.code?.trim() || resolved.code;
+      const ship = normalizeOptionalString(input.ship) || resolved.ship;
+      const url = normalizeOptionalString(input.url) || resolved.url;
+      const code = normalizeOptionalString(input.code) || resolved.code;
       if (!ship) {
         return "Tlon requires --ship.";
       }