diff --git a/src/compat.ts b/src/compat.ts
index 2d4934c..d66cca4 100644
--- a/src/compat.ts
+++ b/src/compat.ts
@@ -51,10 +51,17 @@ export function isHostVersionSupported(hostVersion: string): boolean {
   return compareVersions(host, min) >= 0;
 }
 
+/** Tracks host versions that have already passed the compatibility check. */
+const checkedHostVersions = new Set<string>();
+
 /**
  * Fail-fast guard.  Call at the very start of `register()` to prevent the
  * plugin from loading on an incompatible host.
  *
+ * On the first successful check the result is logged at `info` level.
+ * Subsequent re-entrant calls for the same version are logged at `debug`
+ * to avoid log spam when the host invokes `register()` multiple times.
+ *
  * @throws {Error} with a human-readable message when the host is out of range.
  */
 export function assertHostCompatibility(hostVersion: string | undefined): void {
@@ -65,7 +72,12 @@ export function assertHostCompatibility(hostVersion: string | undefined): void {
     return;
   }
   if (isHostVersionSupported(hostVersion)) {
-    logger.info(`[compat] Host OpenClaw ${hostVersion} >= ${SUPPORTED_HOST_MIN}, OK.`);
+    if (checkedHostVersions.has(hostVersion)) {
+      logger.debug(`[compat] Host OpenClaw ${hostVersion} >= ${SUPPORTED_HOST_MIN}, OK (already verified).`);
+    } else {
+      checkedHostVersions.add(hostVersion);
+      logger.info(`[compat] Host OpenClaw ${hostVersion} >= ${SUPPORTED_HOST_MIN}, OK.`);
+    }
     return;
   }
   throw new Error(
diff --git a/src/runtime.ts b/src/runtime.ts
index bbe1a90..f4ed43e 100644
--- a/src/runtime.ts
+++ b/src/runtime.ts
@@ -3,15 +3,25 @@ import type { PluginRuntime } from "openclaw/plugin-sdk/core";
 import { logger } from "./util/logger.js";
 
 let pluginRuntime: PluginRuntime | null = null;
+let runtimeInitialized = false;
 
 export type PluginChannelRuntime = PluginRuntime["channel"];
 
 /**
  * Sets the global Weixin runtime (called from plugin register).
+ *
+ * The first successful call is logged at `info` level.  Subsequent
+ * re-entrant calls (caused by the host re-invoking `register()`) are
+ * logged at `debug` to keep log output clean.
  */
 export function setWeixinRuntime(next: PluginRuntime): void {
   pluginRuntime = next;
-  logger.info(`[runtime] setWeixinRuntime called, runtime set successfully`);
+  if (runtimeInitialized) {
+    logger.debug(`[runtime] setWeixinRuntime called (re-entrant), runtime updated`);
+  } else {
+    runtimeInitialized = true;
+    logger.info(`[runtime] setWeixinRuntime called, runtime set successfully`);
+  }
 }
 
 /**