docs: add WhatsApp reactionLevel and Feishu Drive comment actions

docs/channels/feishu.md

@@ -148,6 +148,7 @@ In **Event Subscription**:
 
 1. Choose **Use long connection to receive events** (WebSocket)
 2. Add the event: `im.message.receive_v1`
+3. (Optional) For Drive comment workflows, also add: `drive.notice.comment_add_v1`
 
 ⚠️ If the gateway is not running, the long-connection setup may fail to save.
 
@@ -735,6 +736,36 @@ Key options:
 - ✅ Topic-thread replies where Feishu exposes `reply_in_thread`
 - ✅ Media replies stay thread-aware when replying to a thread/topic message
 
+## Drive comments
+
+Feishu can trigger the agent when someone adds a comment on a Feishu Drive document (Docs, Sheets,
+etc.). The agent receives the comment text, document context, and the comment thread so it can
+respond in-thread or make document edits.
+
+Requirements:
+
+- Subscribe to `drive.notice.comment_add_v1` in your Feishu app event subscription settings
+  (alongside the existing `im.message.receive_v1`)
+- The Drive tool is enabled by default; disable with `channels.feishu.tools.drive: false`
+
+The `feishu_drive` tool exposes these comment actions:
+
+| Action                 | Description                         |
+| ---------------------- | ----------------------------------- |
+| `list_comments`        | List comments on a document         |
+| `list_comment_replies` | List replies in a comment thread    |
+| `add_comment`          | Add a new top-level comment         |
+| `reply_comment`        | Reply to an existing comment thread |
+
+When the agent handles a Drive comment event, it receives:
+
+- the comment text and sender
+- document metadata (title, type, URL)
+- the comment thread context for in-thread replies
+
+After making document edits, the agent is guided to use `feishu_drive.reply_comment` to notify the
+commenter and then output `NO_REPLY` to avoid duplicate sends.
+
 ## Runtime action surface
 
 Feishu currently exposes these runtime actions:
@@ -750,6 +781,7 @@ Feishu currently exposes these runtime actions:
 - `channel-info`
 - `channel-list`
 - `react` and `reactions` when reactions are enabled in config
+- `feishu_drive` comment actions: `list_comments`, `list_comment_replies`, `add_comment`, `reply_comment`
 
 ## Related