docs: add sample config and verification guide

docs/VERIFY.md

@@ -0,0 +1,30 @@
+# WhisperGate Quick Verification
+
+## 1) Start no-reply API
+
+```bash
+cd no-reply-api
+npm start
+```
+
+## 2) Validate API behavior
+
+```bash
+curl -sS http://127.0.0.1:8787/health
+curl -sS -X POST http://127.0.0.1:8787/v1/chat/completions \
+  -H 'Content-Type: application/json' \
+  -d '{"model":"whispergate-no-reply-v1","messages":[{"role":"user","content":"hi"}]}'
+```
+
+Expected assistant text: `NO_REPLY`
+
+## 3) Enable plugin
+
+Set OpenClaw plugin path to `plugin/` and apply `docs/CONFIG.example.json` values.
+
+## 4) Discord logic check
+
+- non-discord session -> normal model
+- discord + bypass user -> normal model
+- discord + non-bypass + ending punctuation -> normal model
+- discord + non-bypass + no ending punctuation -> no-reply model override