refactor: lower routine OpenCode and Slack logs to debug

Author: LIU9293

packages/agents/opencode/client.ts

@@ -204,14 +204,14 @@ export async function sendMessage(
         ? buildOpenCodeCommand(serverUrl, activeSessionId, payload)
         : null;
 
-      log.info("Sending message via SDK", { sessionId: activeSessionId, agent, model, command });
+      log.debug("Sending message via SDK", { sessionId: activeSessionId, agent, model, command });
 
       const result = await client.session.prompt({
         sessionID: activeSessionId,
         ...payload,
       });
 
-      log.info("OpenCode SDK response received", {
+      log.debug("OpenCode SDK response received", {
         hasData: !!result.data,
         dataKeys: result.data ? Object.keys(result.data) : [],
         error: result.error,
@@ -238,7 +238,7 @@ export async function sendMessage(
         }
       }
 
-      log.info("OpenCode completed", { messageCount: messages.length });
+      log.debug("OpenCode completed", { messageCount: messages.length });
       return messages;
     });
   } finally {

packages/agents/opencode/server.ts

@@ -312,7 +312,7 @@ function stopSessionInstance(sessionId: string): void {
   session.eventLoopRunning = false;
   session.handlers.clear();
   sessionInstances.delete(sessionId);
-  log.info("Stopped OpenCode instance", { sessionId });
+  log.debug("Stopped OpenCode session state", { sessionId });
 }
 
 // Event loop for a specific session

packages/ims/slack/client.ts

@@ -428,7 +428,7 @@ export async function sendMessage(
     log.warn("No Slack bot token available for channel", { channelId });
   }
 
-  log.info("[SLACK] Outgoing message", {
+  log.debug("[SLACK] Outgoing message", {
     workspace,
     channel: channelId,
     thread: threadId,