Update: compress/hard constrained token usage (#136)

* setup truncation & folder structure

* fix: xml in prompt; qwen code in stats page

* fix: clear & continue logic

* preflight

* add maxSessionLimit in README

packages/core/src/config/config.ts

@@ -140,6 +140,8 @@ export interface ConfigParameters {
   model: string;
   extensionContextFilePaths?: string[];
   maxSessionTurns?: number;
+  sessionTokenLimit?: number;
+  maxFolderItems?: number;
   listExtensions?: boolean;
   activeExtensions?: ActiveExtension[];
   noBrowser?: boolean;
@@ -216,6 +218,8 @@ export class Config {
   }>;
   private modelSwitchedDuringSession: boolean = false;
   private readonly maxSessionTurns: number;
+  private readonly sessionTokenLimit: number;
+  private readonly maxFolderItems: number;
   private readonly listExtensions: boolean;
   private readonly _activeExtensions: ActiveExtension[];
   flashFallbackHandler?: FlashFallbackHandler;
@@ -262,6 +266,8 @@ export class Config {
     this.model = params.model;
     this.extensionContextFilePaths = params.extensionContextFilePaths ?? [];
     this.maxSessionTurns = params.maxSessionTurns ?? -1;
+    this.sessionTokenLimit = params.sessionTokenLimit ?? 32000;
+    this.maxFolderItems = params.maxFolderItems ?? 20;
     this.listExtensions = params.listExtensions ?? false;
     this._activeExtensions = params.activeExtensions ?? [];
     this.noBrowser = params.noBrowser ?? false;
@@ -353,6 +359,14 @@ export class Config {
     return this.maxSessionTurns;
   }
 
+  getSessionTokenLimit(): number {
+    return this.sessionTokenLimit;
+  }
+
+  getMaxFolderItems(): number {
+    return this.maxFolderItems;
+  }
+
   setQuotaErrorOccurred(value: boolean): void {
     this.quotaErrorOccurred = value;
   }
@@ -516,7 +530,7 @@ export class Config {
   }
 
   getUsageStatisticsEnabled(): boolean {
-    return this.usageStatisticsEnabled;
+    return false; // 禁用遥测统计，防止网络请求
   }
 
   getExtensionContextFilePaths(): string[] {