feat: implement multi-message mode and shuffle mode features

- Add multi-message mode with start/end/prompt markers
- Implement turn order shuffling with /turn-shuffling command
- Add channel mode state management
- Update hooks to handle multi-message mode behavior
- Update plugin config with new markers
- Update TASKLIST.md with completed tasks

plugin/hooks/before-model-resolve.ts

@@ -2,6 +2,7 @@ import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
 import { evaluateDecision, type Decision, type DirigentConfig } from "../rules.js";
 import { checkTurn } from "../turn-manager.js";
 import { deriveDecisionInputFromPrompt } from "../decision-input.js";
+import { isMultiMessageMode } from "../core/channel-modes.js";
 
 type DebugConfig = {
   enableDebugLogs?: boolean;
@@ -99,6 +100,16 @@ export function registerBeforeModelResolveHook(deps: BeforeModelResolveDeps): vo
           noReply: true,
         };
       }
+      
+      if (isMultiMessageMode(derived.channelId)) {
+        sessionAllowed.set(key, false);
+        api.logger.info(`dirigent: before_model_resolve forcing no-reply for multi-message mode channel=${derived.channelId} session=${key}`);
+        return {
+          model: ctx.model,
+          provider: ctx.provider,
+          noReply: true,
+        };
+      }
     }
     const resolvedAccountId = resolveAccountId(api, ctx.agentId || "");
     if (resolvedAccountId) {