diff --git a/src/cli/channel-auth.test.ts b/src/cli/channel-auth.test.ts
index 59fdc05bd60..1c7d0c30242 100644
--- a/src/cli/channel-auth.test.ts
+++ b/src/cli/channel-auth.test.ts
@@ -353,7 +353,7 @@ describe("channel-auth", () => {
     });
 
     await expect(runChannelLogin({ channel: "whatsapp" }, runtime)).rejects.toThrow(
-      'Channel "whatsapp" does not support login.',
+      'Channel "whatsapp" does not support login. Run `openclaw channels status --channel whatsapp` to inspect supported actions.',
     );
   });
 
@@ -564,7 +564,7 @@ describe("channel-auth", () => {
     });
 
     await expect(runChannelLogout({ channel: "whatsapp" }, runtime)).rejects.toThrow(
-      'Channel "whatsapp" does not support logout.',
+      'Channel "whatsapp" does not support logout. Run `openclaw channels status --channel whatsapp` to inspect supported actions.',
     );
   });
 });
diff --git a/src/cli/channel-auth.ts b/src/cli/channel-auth.ts
index 2ba2d92f41c..39403bac70f 100644
--- a/src/cli/channel-auth.ts
+++ b/src/cli/channel-auth.ts
@@ -16,6 +16,7 @@ import { normalizeOptionalString } from "../shared/string-coerce.js";
 import { sanitizeForLog } from "../terminal/ansi.js";
 import { GATEWAY_CLIENT_MODES, GATEWAY_CLIENT_NAMES } from "../utils/message-channel.js";
 import { formatCliCommand } from "./command-format.js";
+import { formatUnsupportedChannelActionMessage } from "./error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "./plugins-install-record-commit.js";
 
 type ChannelAuthOptions = {
@@ -118,7 +119,11 @@ async function resolveChannelPluginForMode(
   const plugin = resolved.plugin;
   if (!plugin || !supportsChannelAuthMode(plugin, mode)) {
     throw new Error(
-      `Channel "${channelId}" does not support ${mode}. Run ${formatCliCommand("openclaw channels status --channel " + channelId)} for its supported actions.`,
+      formatUnsupportedChannelActionMessage({
+        channel: channelId,
+        action: mode,
+        inspectCommand: "openclaw channels status --channel " + channelId,
+      }),
     );
   }
   return {
@@ -227,7 +232,13 @@ export async function runChannelLogin(
   }
   const login = plugin.auth?.login;
   if (!login) {
-    throw new Error(`Channel "${channelInput}" does not support login.`);
+    throw new Error(
+      formatUnsupportedChannelActionMessage({
+        channel: channelInput,
+        action: "login",
+        inspectCommand: "openclaw channels status --channel " + channelInput,
+      }),
+    );
   }
   // Auth-only flow: do not mutate channel config here.
   setVerbose(Boolean(opts.verbose));
@@ -270,7 +281,13 @@ export async function runChannelLogout(
   }
   const logoutAccount = plugin.gateway?.logoutAccount;
   if (!logoutAccount) {
-    throw new Error(`Channel "${channelInput}" does not support logout.`);
+    throw new Error(
+      formatUnsupportedChannelActionMessage({
+        channel: channelInput,
+        action: "logout",
+        inspectCommand: "openclaw channels status --channel " + channelInput,
+      }),
+    );
   }
   // Prefer the live gateway so logout also stops any active channel runtime.
   const { accountId } = resolveAccountContext(plugin, opts, cfg);
diff --git a/src/cli/daemon-cli/install.ts b/src/cli/daemon-cli/install.ts
index 64cb8d52de3..8fb424b322c 100644
--- a/src/cli/daemon-cli/install.ts
+++ b/src/cli/daemon-cli/install.ts
@@ -23,6 +23,7 @@ import {
 import { defaultRuntime } from "../../runtime.js";
 import { normalizeOptionalString } from "../../shared/string-coerce.js";
 import { formatCliCommand } from "../command-format.js";
+import { formatInvalidConfigPort, formatInvalidPortOption } from "../error-format.js";
 import { buildDaemonServiceSnapshot, installDaemonServiceAndEmit } from "./response.js";
 import {
   createDaemonInstallActionContext,
@@ -94,12 +95,12 @@ export async function runDaemonInstall(opts: DaemonInstallOptions) {
   const cfg = configSnapshot.valid ? configSnapshot.sourceConfig : configSnapshot.config;
   const portOverride = parsePort(opts.port);
   if (opts.port !== undefined && portOverride === null) {
-    fail("Invalid --port. Use a port number from 1 to 65535, for example 18789.");
+    fail(formatInvalidPortOption("--port"));
     return;
   }
   const port = portOverride ?? resolveGatewayPort(cfg);
   if (!Number.isFinite(port) || port <= 0 || port > 65_535) {
-    fail("Invalid Gateway port in config. Set gateway.port to a number from 1 to 65535.");
+    fail(formatInvalidConfigPort("gateway.port"));
     return;
   }
   const runtimeRaw = opts.runtime ? opts.runtime : DEFAULT_GATEWAY_DAEMON_RUNTIME;
diff --git a/src/cli/error-format.ts b/src/cli/error-format.ts
new file mode 100644
index 00000000000..2b784dc46dc
--- /dev/null
+++ b/src/cli/error-format.ts
@@ -0,0 +1,71 @@
+import { formatCliCommand } from "./command-format.js";
+
+const DEFAULT_GATEWAY_PORT_EXAMPLE = 18789;
+
+export function formatPortRangeHint(example = DEFAULT_GATEWAY_PORT_EXAMPLE): string {
+  return `Use a port number from 1 to 65535, for example ${example}.`;
+}
+
+export function formatInvalidPortOption(
+  option: string,
+  example = DEFAULT_GATEWAY_PORT_EXAMPLE,
+): string {
+  return `Invalid ${option}. ${formatPortRangeHint(example)}`;
+}
+
+export function formatInvalidConfigPort(
+  path: string,
+  example = DEFAULT_GATEWAY_PORT_EXAMPLE,
+): string {
+  return `Invalid ${path} in config. Set ${path} to a number from 1 to 65535, or pass --port ${example}.`;
+}
+
+export function formatUnknownChannelMessage(params: {
+  channel: string;
+  listCommand?: string;
+  purpose?: string;
+}): string {
+  const purpose = params.purpose ? ` for ${params.purpose}` : "";
+  const listCommand = params.listCommand ?? "openclaw channels list --all";
+  return `Unknown channel "${params.channel}"${purpose}. Run ${formatCliCommand(
+    listCommand,
+  )} to see configured and installable channels.`;
+}
+
+export function formatUnsupportedChannelActionMessage(params: {
+  channel: string;
+  action: string;
+  inspectCommand?: string;
+}): string {
+  const inspectCommand =
+    params.inspectCommand ?? `openclaw channels capabilities --channel ${params.channel}`;
+  return `Channel "${params.channel}" does not support ${params.action}. Run ${formatCliCommand(
+    inspectCommand,
+  )} to inspect supported actions.`;
+}
+
+export function formatLookupMiss(params: {
+  noun: string;
+  value: string;
+  listCommand: string;
+  valueLabel?: string;
+}): string {
+  const valueLabel = params.valueLabel ?? params.noun.toLowerCase();
+  return `${params.noun} not found: ${params.value}. Run ${formatCliCommand(
+    params.listCommand,
+  )} to see recent ${valueLabel}s.`;
+}
+
+export function formatMissingPluginMessage(params: {
+  id: string;
+  listCommand?: string;
+  includeSearch?: boolean;
+}): string {
+  const listCommand = params.listCommand ?? "openclaw plugins list";
+  const searchHint = params.includeSearch
+    ? `, or ${formatCliCommand("openclaw plugins search " + params.id)} to look for installable plugins`
+    : "";
+  return `Plugin not found: ${params.id}. Run ${formatCliCommand(
+    listCommand,
+  )} to see installed plugins${searchHint}.`;
+}
diff --git a/src/cli/gateway-cli/run.ts b/src/cli/gateway-cli/run.ts
index 6690eb51943..c7e623e09dd 100644
--- a/src/cli/gateway-cli/run.ts
+++ b/src/cli/gateway-cli/run.ts
@@ -34,6 +34,7 @@ import {
 } from "../../shared/string-coerce.js";
 import { formatCliCommand } from "../command-format.js";
 import { inheritOptionFromParent } from "../command-options.js";
+import { formatInvalidConfigPort, formatInvalidPortOption } from "../error-format.js";
 import { withProgress } from "../progress.js";
 import { parsePort } from "../shared/parse-port.js";
 import { installQaParentWatchdog } from "./qa-parent-watchdog.js";
@@ -520,15 +521,15 @@ async function runGatewayCommand(opts: GatewayRunOpts) {
   });
   const portOverride = parsePort(opts.port);
   if (opts.port !== undefined && portOverride === null) {
-    defaultRuntime.error("Invalid --port. Use a positive port number, for example 3000.");
+    defaultRuntime.error(formatInvalidPortOption("--port"));
     defaultRuntime.exit(1);
+    return;
   }
   const port = portOverride ?? resolveGatewayPort(cfg);
-  if (!Number.isFinite(port) || port <= 0) {
-    defaultRuntime.error(
-      `Gateway port is invalid in config. Set it with ${formatCliCommand("openclaw config set gateway.port 3000")} or pass --port 3000.`,
-    );
+  if (!Number.isFinite(port) || port <= 0 || port > 65_535) {
+    defaultRuntime.error(formatInvalidConfigPort("gateway.port"));
     defaultRuntime.exit(1);
+    return;
   }
   const { formatFutureConfigActionBlock, resolveFutureConfigActionBlock } =
     await import("../../config/future-version-guard.js");
diff --git a/src/cli/node-cli/daemon.ts b/src/cli/node-cli/daemon.ts
index a964347de8b..493816d2cab 100644
--- a/src/cli/node-cli/daemon.ts
+++ b/src/cli/node-cli/daemon.ts
@@ -34,6 +34,7 @@ import {
   parsePort,
   resolveRuntimeStatusColor,
 } from "../daemon-cli/shared.js";
+import { formatInvalidConfigPort, formatInvalidPortOption } from "../error-format.js";
 
 type NodeDaemonInstallOptions = {
   host?: string;
@@ -95,7 +96,11 @@ export async function runNodeDaemonInstall(opts: NodeDaemonInstallOptions) {
   const config = await loadNodeHostConfig();
   const { host, port } = resolveNodeDefaults(opts, config);
   if (!Number.isFinite(port ?? Number.NaN) || (port ?? 0) <= 0 || (port ?? 0) > 65_535) {
-    fail("Invalid node host port. Use a port number from 1 to 65535.");
+    fail(
+      opts.port !== undefined
+        ? formatInvalidPortOption("--port")
+        : formatInvalidConfigPort("node.gateway.port"),
+    );
     return;
   }
 
diff --git a/src/cli/pairing-cli.ts b/src/cli/pairing-cli.ts
index 20119eaa9ca..ca49fc926a9 100644
--- a/src/cli/pairing-cli.ts
+++ b/src/cli/pairing-cli.ts
@@ -46,7 +46,9 @@ function parseChannel(raw: unknown, channels: PairingChannel[]): PairingChannel
   if (/^[a-z][a-z0-9_-]{0,63}$/.test(value)) {
     return value as PairingChannel;
   }
-  throw new Error(`Invalid channel "${value}". Use lowercase letters, numbers, "_" or "-".`);
+  throw new Error(
+    `Invalid channel "${value}". Use lowercase letters, numbers, "_" or "-", for example "telegram".`,
+  );
 }
 
 async function notifyApproved(channel: PairingChannel, id: string) {
diff --git a/src/cli/plugins-cli.policy.test.ts b/src/cli/plugins-cli.policy.test.ts
index 5701656dcca..d884a128953 100644
--- a/src/cli/plugins-cli.policy.test.ts
+++ b/src/cli/plugins-cli.policy.test.ts
@@ -189,7 +189,7 @@ describe("plugins cli policy mutations", () => {
       );
 
       expect(runtimeErrors).toContain(
-        "Plugin not found: missing-plugin. Run `openclaw plugins list` to see installed plugins.",
+        "Plugin not found: missing-plugin. Run `openclaw plugins list` to see installed plugins, or `openclaw plugins search missing-plugin` to look for installable plugins.",
       );
       expect(enablePluginInConfig).not.toHaveBeenCalled();
       expect(writeConfigFile).not.toHaveBeenCalled();
diff --git a/src/cli/plugins-cli.ts b/src/cli/plugins-cli.ts
index 6918faafb96..d635e856caf 100644
--- a/src/cli/plugins-cli.ts
+++ b/src/cli/plugins-cli.ts
@@ -11,6 +11,7 @@ import { defaultRuntime } from "../runtime.js";
 import { formatDocsLink } from "../terminal/links.js";
 import { theme } from "../terminal/theme.js";
 import { shortenHomeInString } from "../utils.js";
+import { formatMissingPluginMessage } from "./error-format.js";
 import type { PluginInspectOptions } from "./plugins-inspect-command.js";
 import type { PluginsListOptions } from "./plugins-list-command.js";
 import { applyParentDefaultHelpAction } from "./program/parent-default-help.js";
@@ -58,9 +59,7 @@ function formatRegistryState(state: "missing" | "fresh" | "stale"): string {
 }
 
 function reportMissingPlugin(id: string) {
-  defaultRuntime.error(
-    `Plugin not found: ${id}. Run \`openclaw plugins list\` to see installed plugins.`,
-  );
+  defaultRuntime.error(formatMissingPluginMessage({ id, includeSearch: true }));
   return defaultRuntime.exit(1);
 }
 
diff --git a/src/cli/plugins-inspect-command.ts b/src/cli/plugins-inspect-command.ts
index e6233c2f76e..fffd0f3f75b 100644
--- a/src/cli/plugins-inspect-command.ts
+++ b/src/cli/plugins-inspect-command.ts
@@ -9,6 +9,7 @@ import { getTerminalTableWidth, renderTable } from "../terminal/table.js";
 import { theme } from "../terminal/theme.js";
 import { shortenHomeInString, shortenHomePath } from "../utils.js";
 import { formatCliCommand } from "./command-format.js";
+import { formatMissingPluginMessage } from "./error-format.js";
 import { quietPluginJsonLogger } from "./plugins-command-helpers.js";
 
 export type PluginInspectOptions = {
@@ -233,9 +234,7 @@ export async function runPluginsInspectCommand(
   );
   const targetPlugin = snapshotReport.plugins.find((entry) => entry.id === id || entry.name === id);
   if (!targetPlugin) {
-    defaultRuntime.error(
-      `Plugin not found: ${id}. Run ${formatCliCommand("openclaw plugins list")} to see installed plugins.`,
-    );
+    defaultRuntime.error(formatMissingPluginMessage({ id, includeSearch: true }));
     return defaultRuntime.exit(1);
   }
   const report = runtimeInspect
@@ -258,7 +257,7 @@ export async function runPluginsInspectCommand(
   });
   if (!inspect) {
     defaultRuntime.error(
-      `Plugin not found: ${id}. Run ${formatCliCommand("openclaw plugins list --json")} to inspect raw discovery state.`,
+      formatMissingPluginMessage({ id, listCommand: "openclaw plugins list --json" }),
     );
     return defaultRuntime.exit(1);
   }
diff --git a/src/commands/agents.bindings.ts b/src/commands/agents.bindings.ts
index 283670c521d..af866f33716 100644
--- a/src/commands/agents.bindings.ts
+++ b/src/commands/agents.bindings.ts
@@ -3,6 +3,7 @@ import { resolveChannelDefaultAccountId } from "../channels/plugins/helpers.js";
 import { getLoadedChannelPlugin } from "../channels/plugins/index.js";
 import type { ChannelId } from "../channels/plugins/types.public.js";
 import { normalizeChannelId as normalizeBundledChannelId } from "../channels/registry.js";
+import { formatUnknownChannelMessage } from "../cli/error-format.js";
 import { isRouteBinding, listRouteBindings } from "../config/bindings.js";
 import type { AgentRouteBinding } from "../config/types.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
@@ -313,12 +314,14 @@ export function parseBindingSpecs(params: {
     const [channelRaw, accountRaw] = trimmed.split(":", 2);
     const channel = normalizeBindingChannelId(channelRaw, params.config);
     if (!channel) {
-      errors.push(`Unknown channel "${channelRaw}".`);
+      errors.push(formatUnknownChannelMessage({ channel: channelRaw }));
       continue;
     }
     let accountId: string | undefined = accountRaw?.trim();
     if (accountRaw !== undefined && !accountId) {
-      errors.push(`Invalid binding "${trimmed}" (empty account id).`);
+      errors.push(
+        `Invalid binding "${trimmed}". Account id is empty. Use <channel>:<account>, for example telegram:default.`,
+      );
       continue;
     }
     accountId = resolveBindingAccountId({
diff --git a/src/commands/channels/add.ts b/src/commands/channels/add.ts
index 37565e31d60..9e87c280f77 100644
--- a/src/commands/channels/add.ts
+++ b/src/commands/channels/add.ts
@@ -6,6 +6,11 @@ import { moveSingleAccountChannelSectionToDefaultAccount } from "../../channels/
 import type { ChannelSetupPlugin } from "../../channels/plugins/setup-wizard-types.js";
 import type { ChannelPlugin } from "../../channels/plugins/types.plugin.js";
 import type { ChannelId, ChannelSetupInput } from "../../channels/plugins/types.public.js";
+import { formatCliCommand } from "../../cli/command-format.js";
+import {
+  formatUnknownChannelMessage,
+  formatUnsupportedChannelActionMessage,
+} from "../../cli/error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "../../cli/plugins-install-record-commit.js";
 import { refreshPluginRegistryAfterConfigMutation } from "../../cli/plugins-registry-refresh.js";
 import type { OpenClawConfig } from "../../config/config.js";
@@ -345,7 +350,7 @@ export async function channelsAddCommand(
   if (!channel) {
     const hint = catalogEntry
       ? `Plugin ${catalogEntry.meta.label} could not be loaded after install. Run openclaw doctor --fix, then retry openclaw channels add.`
-      : `Unknown channel: ${rawChannel}. Run openclaw channels list --all to see configured and installable channels.`;
+      : formatUnknownChannelMessage({ channel: rawChannel });
     runtime.error(hint);
     runtime.exit(1);
     return;
@@ -354,7 +359,10 @@ export async function channelsAddCommand(
   const plugin = await loadScopedPlugin(channel, catalogEntry?.pluginId);
   if (!plugin?.setup?.applyAccountConfig) {
     runtime.error(
-      `Channel ${channel} does not support non-interactive add. Run openclaw channels add with no flags for guided setup, or openclaw channels list --all to inspect available channels.`,
+      `${formatUnsupportedChannelActionMessage({
+        channel,
+        action: "non-interactive add",
+      })} Run ${formatCliCommand("openclaw channels add")} with no flags for guided setup.`,
     );
     runtime.exit(1);
     return;
diff --git a/src/commands/channels/capabilities.ts b/src/commands/channels/capabilities.ts
index 6ac3079664c..2249a3494d5 100644
--- a/src/commands/channels/capabilities.ts
+++ b/src/commands/channels/capabilities.ts
@@ -11,6 +11,7 @@ import type {
   ChannelPlugin,
 } from "../../channels/plugins/types.public.js";
 import { formatCliCommand } from "../../cli/command-format.js";
+import { formatUnknownChannelMessage } from "../../cli/error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "../../cli/plugins-install-record-commit.js";
 import { refreshPluginRegistryAfterConfigMutation } from "../../cli/plugins-registry-refresh.js";
 import {
@@ -296,11 +297,7 @@ export async function channelsCapabilitiesCommand(
         })();
 
   if (!selected || selected.length === 0) {
-    runtime.error(
-      danger(
-        `Unknown channel "${rawChannel}". Run ${formatCliCommand("openclaw channels list")} to see installed channels.`,
-      ),
-    );
+    runtime.error(danger(formatUnknownChannelMessage({ channel: rawChannel })));
     runtime.exit(1);
     return;
   }
diff --git a/src/commands/channels/remove.ts b/src/commands/channels/remove.ts
index 2803ab9fa17..bd43ad25d40 100644
--- a/src/commands/channels/remove.ts
+++ b/src/commands/channels/remove.ts
@@ -3,6 +3,10 @@ import { getChannelPlugin, normalizeChannelId } from "../../channels/plugins/ind
 import { listReadOnlyChannelPluginsForConfig } from "../../channels/plugins/read-only.js";
 import type { ChannelPlugin } from "../../channels/plugins/types.plugin.js";
 import { formatCliCommand } from "../../cli/command-format.js";
+import {
+  formatUnknownChannelMessage,
+  formatUnsupportedChannelActionMessage,
+} from "../../cli/error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "../../cli/plugins-install-record-commit.js";
 import { refreshPluginRegistryAfterConfigMutation } from "../../cli/plugins-registry-refresh.js";
 import { replaceConfigFile, type OpenClawConfig } from "../../config/config.js";
@@ -159,9 +163,7 @@ export async function channelsRemoveCommand(
   }
   const resolvedChannel = resolvedPluginState?.channelId ?? channel;
   if (!resolvedChannel) {
-    runtime.error(
-      `Unknown channel "${rawChannel}". Run ${formatCliCommand("openclaw channels list")} to see supported channels.`,
-    );
+    runtime.error(formatUnknownChannelMessage({ channel: rawChannel }));
     runtime.exit(1);
     return;
   }
@@ -175,7 +177,7 @@ export async function channelsRemoveCommand(
       runtime.exit(1);
       return;
     }
-    runtime.error(`Unknown channel "${resolvedChannel}".`);
+    runtime.error(formatUnknownChannelMessage({ channel: resolvedChannel }));
     runtime.exit(1);
     return;
   }
@@ -197,7 +199,7 @@ export async function channelsRemoveCommand(
   if (deleteConfig) {
     if (!plugin.config.deleteAccount) {
       runtime.error(
-        `Channel "${channel}" does not support delete. Use disable/remove without --delete.`,
+        `${formatUnsupportedChannelActionMessage({ channel, action: "delete" })} Use ${formatCliCommand("openclaw channels remove --channel " + channel)} to disable it without deleting config.`,
       );
       runtime.exit(1);
       return;
@@ -214,7 +216,7 @@ export async function channelsRemoveCommand(
   } else {
     if (!plugin.config.setAccountEnabled) {
       runtime.error(
-        `Channel "${channel}" does not support disable. Use --delete only if you want to remove config.`,
+        `${formatUnsupportedChannelActionMessage({ channel, action: "disable" })} Use ${formatCliCommand("openclaw channels remove --channel " + channel + " --delete")} only if you want to remove config.`,
       );
       runtime.exit(1);
       return;
diff --git a/src/commands/channels/resolve.ts b/src/commands/channels/resolve.ts
index f3adc357d87..69cf1fe5b3b 100644
--- a/src/commands/channels/resolve.ts
+++ b/src/commands/channels/resolve.ts
@@ -6,6 +6,7 @@ import type {
 import { resolveCommandConfigWithSecrets } from "../../cli/command-config-resolution.js";
 import { formatCliCommand } from "../../cli/command-format.js";
 import { getChannelsCommandSecretTargetIds } from "../../cli/command-secret-targets.js";
+import { formatUnsupportedChannelActionMessage } from "../../cli/error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "../../cli/plugins-install-record-commit.js";
 import { refreshPluginRegistryAfterConfigMutation } from "../../cli/plugins-registry-refresh.js";
 import {
@@ -197,7 +198,10 @@ export async function channelsResolveCommand(opts: ChannelsResolveOptions, runti
   if (!plugin?.resolver?.resolveTargets) {
     const channelText = selection.channel ?? explicitChannel ?? "";
     throw new Error(
-      `Channel ${channelText} does not support resolve. Run ${formatCliCommand("openclaw channels capabilities --channel " + channelText)} to inspect supported actions.`,
+      formatUnsupportedChannelActionMessage({
+        channel: channelText,
+        action: "resolve",
+      }),
     );
   }
   const preferredKind = resolvePreferredKind(opts.kind);
diff --git a/src/commands/configure.gateway.ts b/src/commands/configure.gateway.ts
index 3c5c78780a0..6c14cf6fce6 100644
--- a/src/commands/configure.gateway.ts
+++ b/src/commands/configure.gateway.ts
@@ -1,3 +1,4 @@
+import { formatPortRangeHint } from "../cli/error-format.js";
 import { resolveGatewayPort } from "../config/config.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { isValidEnvSecretRefId, type SecretInput } from "../config/types.secrets.js";
@@ -29,7 +30,7 @@ type GatewayTokenInputMode = "plaintext" | "ref";
 function validateGatewayPortInput(value: unknown): string | undefined {
   const port = Number(typeof value === "string" ? value.trim() : value);
   if (!Number.isInteger(port) || port < 1 || port > 65_535) {
-    return "Use a port number from 1 to 65535, for example 18789.";
+    return formatPortRangeHint();
   }
   return undefined;
 }
diff --git a/src/commands/configure.wizard.ts b/src/commands/configure.wizard.ts
index 857263b3473..b5ac3bca261 100644
--- a/src/commands/configure.wizard.ts
+++ b/src/commands/configure.wizard.ts
@@ -3,6 +3,7 @@ import nodePath from "node:path";
 import { isDeepStrictEqual } from "node:util";
 import { describeCodexNativeWebSearch } from "../agents/codex-native-web-search.shared.js";
 import { formatCliCommand } from "../cli/command-format.js";
+import { formatPortRangeHint } from "../cli/error-format.js";
 import { commitConfigWithPendingPluginInstalls } from "../cli/plugins-install-record-commit.js";
 import { readConfigFileSnapshot, resolveGatewayPort } from "../config/config.js";
 import { logConfigUpdated } from "../config/logging.js";
@@ -64,7 +65,7 @@ const setupPluginConfigModuleLoader = createLazyImportLoader<SetupPluginConfigMo
 function validateGatewayPortInput(value: unknown): string | undefined {
   const port = Number(typeof value === "string" ? value.trim() : value);
   if (!Number.isInteger(port) || port < 1 || port > 65_535) {
-    return "Use a port number from 1 to 65535, for example 18789.";
+    return formatPortRangeHint();
   }
   return undefined;
 }
diff --git a/src/commands/message.ts b/src/commands/message.ts
index b63e4a8571a..0d6b98f3941 100644
--- a/src/commands/message.ts
+++ b/src/commands/message.ts
@@ -2,6 +2,7 @@ import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 import { CHANNEL_MESSAGE_ACTION_NAMES } from "../channels/plugins/message-action-names.js";
 import type { ChannelMessageActionName } from "../channels/plugins/types.public.js";
 import { resolveCommandConfigWithSecrets } from "../cli/command-config-resolution.js";
+import { formatCliCommand } from "../cli/command-format.js";
 import { getScopedChannelsCommandSecretTargets } from "../cli/command-secret-targets.js";
 import { resolveMessageSecretScope } from "../cli/message-secret-scope.js";
 import { createOutboundSendDeps, type CliDeps } from "../cli/outbound-send-deps.js";
@@ -58,7 +59,11 @@ export async function messageCommand(
     (name) => normalizeLowercaseStringOrEmpty(name) === normalizedActionInput,
   );
   if (!actionMatch) {
-    throw new Error(`Unknown message action: ${actionInput}`);
+    throw new Error(
+      `Unknown message action "${actionInput}". Use one of ${CHANNEL_MESSAGE_ACTION_NAMES.join(
+        ", ",
+      )}. Example: ${formatCliCommand("openclaw message send --channel <channel> --target <id> --text <message>")}.`,
+    );
   }
   const action = actionMatch as ChannelMessageActionName;
 
diff --git a/src/commands/onboard-non-interactive/local/gateway-config.ts b/src/commands/onboard-non-interactive/local/gateway-config.ts
index 4d7e79778cc..4b3e15e03df 100644
--- a/src/commands/onboard-non-interactive/local/gateway-config.ts
+++ b/src/commands/onboard-non-interactive/local/gateway-config.ts
@@ -1,4 +1,5 @@
 import { formatCliCommand } from "../../../cli/command-format.js";
+import { formatInvalidPortOption } from "../../../cli/error-format.js";
 import type { OpenClawConfig } from "../../../config/types.openclaw.js";
 import { isValidEnvSecretRefId, resolveSecretInputRef } from "../../../config/types.secrets.js";
 import type { RuntimeEnv } from "../../../runtime.js";
@@ -23,8 +24,13 @@ export function applyNonInteractiveGatewayConfig(params: {
   const { opts, runtime } = params;
 
   const hasGatewayPort = opts.gatewayPort !== undefined;
-  if (hasGatewayPort && (!Number.isFinite(opts.gatewayPort) || (opts.gatewayPort ?? 0) <= 0)) {
-    runtime.error("Invalid --gateway-port. Use a positive port number, for example 3000.");
+  if (
+    hasGatewayPort &&
+    (!Number.isFinite(opts.gatewayPort) ||
+      (opts.gatewayPort ?? 0) <= 0 ||
+      opts.gatewayPort > 65_535)
+  ) {
+    runtime.error(formatInvalidPortOption("--gateway-port"));
     runtime.exit(1);
     return null;
   }
diff --git a/src/commands/sessions.test.ts b/src/commands/sessions.test.ts
index 11c68d625cb..52987fd085a 100644
--- a/src/commands/sessions.test.ts
+++ b/src/commands/sessions.test.ts
@@ -316,7 +316,7 @@ describe("sessionsCommand", () => {
     const { runtime, errors } = makeRuntime();
 
     await expect(sessionsCommand({ store, active: "0" }, runtime)).rejects.toThrow("exit 1");
-    expect(errors[0]).toContain("--active must be a positive integer");
+    expect(errors[0]).toContain("--active must be a positive number of minutes");
 
     fs.rmSync(store);
   });
@@ -334,7 +334,7 @@ describe("sessionsCommand", () => {
     const { runtime, errors } = makeRuntime();
 
     await expect(sessionsCommand({ store, limit: "0" }, runtime)).rejects.toThrow("exit 1");
-    expect(errors[0]).toContain('--limit must be a positive integer or "all"');
+    expect(errors[0]).toContain('--limit must be a positive integer or "all", for example');
 
     fs.rmSync(store);
   });
diff --git a/src/commands/sessions.ts b/src/commands/sessions.ts
index 189f6b9b0b0..0549d2c88ac 100644
--- a/src/commands/sessions.ts
+++ b/src/commands/sessions.ts
@@ -234,7 +234,7 @@ export async function sessionsCommand(
   if (opts.active !== undefined) {
     const parsed = Number.parseInt(opts.active, 10);
     if (Number.isNaN(parsed) || parsed <= 0) {
-      runtime.error("--active must be a positive integer (minutes)");
+      runtime.error("--active must be a positive number of minutes, for example --active 30.");
       runtime.exit(1);
       return;
     }
@@ -243,7 +243,7 @@ export async function sessionsCommand(
 
   const limit = parseSessionsLimit(opts.limit);
   if (limit === null) {
-    runtime.error('--limit must be a positive integer or "all"');
+    runtime.error('--limit must be a positive integer or "all", for example --limit 25.');
     runtime.exit(1);
     return;
   }
diff --git a/src/commands/tasks.ts b/src/commands/tasks.ts
index 724becce53b..12ce852bbfc 100644
--- a/src/commands/tasks.ts
+++ b/src/commands/tasks.ts
@@ -1,5 +1,5 @@
 import fs from "node:fs";
-import { formatCliCommand } from "../cli/command-format.js";
+import { formatLookupMiss } from "../cli/error-format.js";
 import { getRuntimeConfig } from "../config/config.js";
 import {
   loadSessionStore,
@@ -58,7 +58,12 @@ const SESSION_REGISTRY_RETENTION_MS = 7 * 24 * 60 * 60_000;
 const info = theme.info;
 
 function formatTaskLookupMiss(lookup: string): string {
-  return `Task not found: ${lookup}. Run ${formatCliCommand("openclaw tasks list")} to see recent task ids.`;
+  return formatLookupMiss({
+    noun: "Task",
+    value: lookup,
+    listCommand: "openclaw tasks list",
+    valueLabel: "task id",
+  });
 }
 
 async function loadTaskCancelConfig() {
diff --git a/src/wizard/setup.gateway-config.ts b/src/wizard/setup.gateway-config.ts
index 0e1d7387a0d..8b599d631c8 100644
--- a/src/wizard/setup.gateway-config.ts
+++ b/src/wizard/setup.gateway-config.ts
@@ -1,3 +1,4 @@
+import { formatPortRangeHint } from "../cli/error-format.js";
 import {
   normalizeGatewayTokenInput,
   randomToken,
@@ -55,7 +56,7 @@ function normalizeWizardTextInput(value: unknown): string {
 function validateGatewayPortInput(value: unknown): string | undefined {
   const port = Number(normalizeWizardTextInput(value));
   if (!Number.isInteger(port) || port < 1 || port > 65_535) {
-    return "Use a port number from 1 to 65535, for example 18789.";
+    return formatPortRangeHint();
   }
   return undefined;
 }