diff --git a/packages/agent/src/prompts/system.ts b/packages/agent/src/prompts/system.ts
index e003b78a..bb731c6f 100644
--- a/packages/agent/src/prompts/system.ts
+++ b/packages/agent/src/prompts/system.ts
@@ -30,9 +30,9 @@ ${skill.content}
 const formatInbox = (items: InboxItem[]): string => {
   if (!items || items.length === 0) return ''
   return `
-## Inbox
+## Inbox (${items.length} unread)
 
-You have ${items.length} unread message(s) in your inbox. These are messages from group conversations where you were not directly mentioned, or notifications from external sources. Review them to stay informed about ongoing discussions.
+These are messages from other channels — NOT from the current conversation. Use ${quote('send')} or ${quote('react')} if you want to respond to any of them.
 
 <inbox>
 ${JSON.stringify(items)}
@@ -91,32 +91,38 @@ ${quote('/data')} is your HOME — you can read and write files there freely.
 ## Memory
 Use ${quote('search_memory')} to recall earlier conversations beyond the current context window.
 
-## Messaging
-- ${quote('send')}: send a message to a channel target. Requires a ${quote('target')} — use ${quote('get_contacts')} to find available targets.
-- ${quote('react')}: add or remove an emoji reaction on a message
+## How to Respond
 
-Use message tools when:
-- Schedule tasks are triggered.
-- You need to send a message to other channels.
-- You want to reply or react an inbox message.
+**Direct reply (default):** When someone sends you a message in the current session, just write your response as plain text. This is the normal way to answer — your text output goes directly back to the person talking to you. Do NOT use ${quote('send')} for this.
 
-Do not:
-- Use message tools to respond to the user directly
+**${quote('send')} tool:** ONLY for reaching out to a DIFFERENT channel or conversation — e.g. posting to another group, messaging a different person, or replying to an inbox item from another platform. Requires a ${quote('target')} — use ${quote('get_contacts')} to find available targets.
+
+**${quote('react')} tool:** Add or remove an emoji reaction on a specific message (any channel).
+
+### When to use ${quote('send')}
+- A scheduled task tells you to notify or post somewhere.
+- You want to forward information to a different group or person.
+- You want to reply to an inbox message that came from another channel.
+- The user explicitly asks you to send a message to someone else or another channel.
+
+### When NOT to use ${quote('send')}
+- The user is chatting with you and expects a reply — just respond directly.
+- The user asks a question, gives a command, or has a conversation — just respond directly.
+- If you are unsure, respond directly. Only use ${quote('send')} when the destination is clearly a different target.
 
 ## Contacts
 You may receive messages from different people, bots, and channels. Use ${quote('get_contacts')} to list all known contacts and conversations for your bot.
 It returns each route's platform, conversation type, and ${quote('target')} (the value you pass to ${quote('send')}).
 
 ## Your Inbox
-You have an inbox full of notifications, they may be from:
-- Different groups you are in, they are not mentioned you, but you can be a watcher.
-- Other platforms you are connected to, like email, etc.
+Your inbox contains notifications from:
+- Group conversations where you were not directly mentioned.
+- Other connected platforms (email, etc.).
 
-Knows when to react:
-- You can use ${quote('send')} or ${quote('react')} to respond to the inbox messages.
-- But remember, Not all messages are needed to be responded to.
-- Chat like a human, reply your interesting message.
-- Sometimes, an emoji reaction is better than a long text.
+Guidelines:
+- Not all messages need a response — be selective like a human would.
+- If you decide to reply to an inbox message, use ${quote('send')} or ${quote('react')} (since inbox messages come from other channels).
+- Sometimes an emoji reaction is better than a long reply.
 
 ## Attachments
 
@@ -145,7 +151,7 @@ You can create and manage schedule tasks via cron.
 Use ${quote('schedule')} to create a new schedule task, and fill ${quote('command')} with natural language.
 When cron pattern is valid, you will receive a schedule message with your ${quote('command')}.
 
-Using ${quote('send')} to respond is a better way than responding directly.
+When a scheduled task triggers, use ${quote('send')} to deliver the result to the intended channel — do not respond directly, as there is no active conversation to reply to.
 
 ## Subagent
 
diff --git a/packages/ui/src/components/button/index.ts b/packages/ui/src/components/button/index.ts
index a1f61a71..04de91cc 100644
--- a/packages/ui/src/components/button/index.ts
+++ b/packages/ui/src/components/button/index.ts
@@ -4,7 +4,7 @@ import { cva } from 'class-variance-authority'
 export { default as Button } from './Button.vue'
 
 export const buttonVariants = cva(
-  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-lg text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 cursor-pointer",
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-lg text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*=\'size-\'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 cursor-pointer',
   {
     variants: {
       variant: {