docs: fix incorrect CLI command in extension READMEs (#112057)

Replace non-existent 'openclaw plugin add' with the correct
'openclaw plugins install' command in 14 extension README files.

The CLI only registers 'openclaw plugins install' (src/cli/plugins-cli.ts),
and the previous command would fail for users following the docs.

Co-authored-by: hilbert <xuxiaojing@tojoy.com>

extensions/amazon-bedrock-mantle/README.md

@@ -5,7 +5,7 @@ Official OpenClaw provider plugin for routing Amazon Bedrock Mantle models throu
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/amazon-bedrock-mantle-provider
+openclaw plugins install @openclaw/amazon-bedrock-mantle-provider
 ```
 
 Use this plugin when your Bedrock deployment exposes Mantle-compatible model routing and you want OpenClaw agents to address those models through the Bedrock Mantle provider.

extensions/amazon-bedrock/README.md

@@ -5,7 +5,7 @@ Official OpenClaw provider plugin for Amazon Bedrock. It adds Bedrock model disc
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/amazon-bedrock-provider
+openclaw plugins install @openclaw/amazon-bedrock-provider
 ```
 
 Configure AWS credentials and region through your normal OpenClaw credential/profile setup, then select Bedrock models with the `amazon-bedrock/...` provider prefix.

extensions/anthropic-vertex/README.md

@@ -5,7 +5,7 @@ Official OpenClaw provider plugin for Claude models hosted through Google Vertex
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/anthropic-vertex-provider
+openclaw plugins install @openclaw/anthropic-vertex-provider
 ```
 
 Configure Google Cloud credentials and the target Vertex project/region in OpenClaw, then select Claude models with the Anthropic Vertex provider.

extensions/discord/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Discord servers, channels, DMs, slash comma
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/discord
+openclaw plugins install @openclaw/discord
 ```
 
 Configure a Discord bot token and the channels or servers OpenClaw should handle. The plugin lets OpenClaw agents receive Discord messages and respond through the configured Discord app.

extensions/feishu/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Feishu and Lark workplace chats. Community
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/feishu
+openclaw plugins install @openclaw/feishu
 ```
 
 Configure the Feishu/Lark app credentials in OpenClaw, then connect the plugin to the chats where agents should receive and send messages.

extensions/googlechat/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Google Chat spaces and direct messages.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/googlechat
+openclaw plugins install @openclaw/googlechat
 ```
 
 Configure the Google Chat app credentials and allowed spaces in OpenClaw. The plugin lets agents receive Google Chat events and reply through the configured app.

extensions/line/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for LINE Bot API chats.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/line
+openclaw plugins install @openclaw/line
 ```
 
 Configure LINE channel credentials in OpenClaw, then connect the bot to the chats where agents should receive and send messages.

extensions/matrix/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Matrix rooms and direct messages.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/matrix
+openclaw plugins install @openclaw/matrix
 ```
 
 Configure the Matrix homeserver and bot credentials in OpenClaw. The plugin lets agents join configured rooms, receive messages, and reply through Matrix.

extensions/msteams/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Microsoft Teams bot conversations.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/msteams
+openclaw plugins install @openclaw/msteams
 ```
 
 Configure the Teams bot credentials and trusted service URLs in OpenClaw, then connect the bot to the teams or chats where agents should operate.

extensions/nextcloud-talk/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Nextcloud Talk conversations.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/nextcloud-talk
+openclaw plugins install @openclaw/nextcloud-talk
 ```
 
 Configure the Nextcloud server and Talk credentials in OpenClaw, then enable the conversations where agents should receive and send messages.

extensions/qqbot/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for QQ Bot group and direct-message workflows.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/qqbot
+openclaw plugins install @openclaw/qqbot
 ```
 
 Configure QQ Bot credentials in OpenClaw, then connect the bot to the groups or direct-message contexts where agents should operate.

extensions/slack/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Slack channels, DMs, commands, and app even
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/slack
+openclaw plugins install @openclaw/slack
 ```
 
 Configure the Slack app credentials and allowed workspaces/channels in OpenClaw. The plugin lets agents receive Slack events and reply through the configured Slack app.

extensions/synology-chat/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for Synology Chat conversations and direct mess
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/synology-chat
+openclaw plugins install @openclaw/synology-chat
 ```
 
 Configure Synology Chat credentials and allowed conversations in OpenClaw, then use the plugin to route messages between Synology Chat and OpenClaw agents.

extensions/whatsapp/README.md

@@ -5,7 +5,7 @@ Official OpenClaw channel plugin for WhatsApp Web chats.
 Install from OpenClaw:
 
 ```bash
-openclaw plugin add @openclaw/whatsapp
+openclaw plugins install @openclaw/whatsapp
 ```
 
 Link a WhatsApp account through the plugin's setup flow, then configure which chats OpenClaw agents should monitor and reply to.