feat(cron): add in-session loop scheduling with cron tools

Add session-scoped recurring jobs that fire while you work. Jobs live
inside the current Qwen Code process and are gone when you exit.

New tools:
- cron_create: schedule a prompt to run on a cron expression
- cron_list: list active cron jobs
- cron_delete: cancel a scheduled job

Components:
- CronScheduler service for in-process job management
- cronParser utility for 5-field cron expressions
- /loop skill for natural language scheduling
- Non-interactive mode integration to keep process alive

Constraints:
- Max 50 jobs per session
- 3-day expiry for recurring jobs
- Jitter to prevent thundering herd
- No catch-up for missed fire times

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packages/core/src/config/config.ts

@@ -41,6 +41,7 @@ import {
   type FileEncodingType,
 } from '../services/fileSystemService.js';
 import { GitService } from '../services/gitService.js';
+import { CronScheduler } from '../services/cronScheduler.js';
 
 // Tools
 import { AskUserQuestionTool } from '../tools/askUserQuestion.js';
@@ -63,6 +64,9 @@ import { WebFetchTool } from '../tools/web-fetch.js';
 import { WebSearchTool } from '../tools/web-search/index.js';
 import { WriteFileTool } from '../tools/write-file.js';
 import { LspTool } from '../tools/lsp.js';
+import { CronCreateTool } from '../tools/cron-create.js';
+import { CronListTool } from '../tools/cron-list.js';
+import { CronDeleteTool } from '../tools/cron-delete.js';
 import type { LspClient } from '../lsp/types.js';
 
 // Other modules
@@ -525,6 +529,7 @@ export class Config {
   private readonly usageStatisticsEnabled: boolean;
   private geminiClient!: GeminiClient;
   private baseLlmClient!: BaseLlmClient;
+  private cronScheduler: CronScheduler | null = null;
   private readonly fileFiltering: {
     respectGitIgnore: boolean;
     respectQwenIgnore: boolean;
@@ -1675,6 +1680,17 @@ export class Config {
     return this.geminiClient;
   }
 
+  getCronScheduler(): CronScheduler {
+    if (!this.cronScheduler) {
+      this.cronScheduler = new CronScheduler();
+    }
+    return this.cronScheduler;
+  }
+
+  isCronDisabled(): boolean {
+    return process.env['QWEN_CODE_DISABLE_CRON'] === '1';
+  }
+
   getEnableRecursiveFileSearch(): boolean {
     return this.fileFiltering.enableRecursiveFileSearch;
   }
@@ -2194,6 +2210,13 @@ export class Config {
       await registerCoreTool(LspTool, this);
     }
 
+    // Register cron tools unless disabled
+    if (!this.isCronDisabled()) {
+      await registerCoreTool(CronCreateTool, this);
+      await registerCoreTool(CronListTool, this);
+      await registerCoreTool(CronDeleteTool, this);
+    }
+
     if (!options?.skipDiscovery) {
       await registry.discoverAllTools();
     }