docs: refine skills

skills/wacli/SKILL.md

@@ -1,15 +1,27 @@
 ---
 name: wacli
-description: WhatsApp CLI for syncing, searching, and sending messages.
+description: WhatsApp CLI for sync, search, and sending messages.
 metadata: {"clawdis":{"requires":{"bins":["wacli"]}}}
 ---
 
 # wacli
 
-Use `wacli` to sync/search/send WhatsApp messages. Start with:
+Use `wacli` for WhatsApp sync/search/send via WhatsApp Web protocol.
 
-```bash
-wacli --help
-```
+Auth + sync
+- `wacli auth` (QR login + initial sync)
+- `wacli sync --follow` (continuous sync)
+- `wacli doctor`
 
-Confirm before sending messages.
+Search + history
+- `wacli messages search "query"`
+- `wacli history backfill --chat <jid> --requests 5 --count 50`
+
+Send
+- Text: `wacli send text --to 1234567890 --message "hello"`
+- File: `wacli send file --to 1234567890 --file /path/pic.jpg --caption "hi"`
+
+Notes
+- Store dir: `~/.wacli` (override with `--store`).
+- Backfill requires your phone online; results are best-effort.
+- Confirm recipient + message before sending.