Dev Advisor MCP Server

Instructions

Implementation Reference

• src/server.ts:172-193 (registration)

  Tool registration including name, description, and input schema definition in the list of tools.

  name: 'analyze_compatibility',
  description: '分析專案的 API 相容性風險，推薦 polyfill 方案',
  inputSchema: {
    type: 'object',
    properties: {
      projectPath: {
        type: 'string',
        description: '專案目錄路徑',
      },
      browserslistConfig: {
        type: 'string',
        description: 'browserslist 配置字串或檔案路徑',
      },
      reportFormat: {
        type: 'string',
        description: '報告格式',
        enum: ['json', 'markdown', 'html'],
        default: 'markdown'
      }
    },
    required: ['projectPath'],
  },

• src/server.ts:968-1009 (handler)

  Primary handler function for executing the analyze_compatibility tool: validates arguments, invokes CompatibilityAnalyzer.analyze(), formats the report, and returns the result.

  private async handleCompatibilityAnalysis(args: unknown) {
    try {
      const validatedArgs = this.validateCompatibilityArgs(args);
      const {
        projectPath,
        browserslistConfig,
        reportFormat = 'markdown'
      } = validatedArgs;
  
      // 預設的檔案模式
      const includePatterns = ['**/*.js', '**/*.ts', '**/*.jsx', '**/*.tsx'];
      const excludePatterns = ['node_modules/**', 'dist/**', 'build/**'];
  
      // 執行相容性分析
      const analysis = await this.compatibilityAnalyzer.analyze(
        projectPath,
        includePatterns,
        excludePatterns,
        browserslistConfig
      );
  
      // 格式化報告
      const report = formatCompatibilityReport(analysis, reportFormat);
  
      return {
        content: [
          {
            type: 'text',
            text: report,
          },
        ],
      };
    } catch (error) {
      const errorMessage = error instanceof ValidationError
        ? `參數驗證失敗: ${error.message}`
        : `分析失敗: ${error instanceof Error ? error.message : String(error)}`;
  
      return {
        content: [{ type: 'text', text: errorMessage }],
        isError: true,
      };
    }

• src/analyzers/compatibility.ts:347-427 (handler)

  Core analysis logic in CompatibilityAnalyzer.analyze(): parses browserslist, scans project for API usage, checks compatibility using CanIUseService, generates report with issues and polyfill recommendations.

  async analyze(
    projectPath: string,
    includePatterns: string[],
    excludePatterns: string[],
    browserslistConfig?: string
  ): Promise<CompatibilityAnalysis> {
    // 1. 解析 browserslist 配置，取得目標瀏覽器
    const { targetBrowsers, query } = this.parseBrowserslistConfig(
      projectPath,
      browserslistConfig
    );
  
    // 2. 解析專案程式碼
    const parsedFiles = await this.parser.parseProject(
      projectPath,
      includePatterns,
      excludePatterns
    );
  
    // 3. 收集所有使用的 API
    const apiUsageMap = this.collectApiUsage(parsedFiles);
  
    // 4. 轉換目標瀏覽器為 CanIUse 格式
    const browserVersions = this.convertBrowserVersions(targetBrowsers);
  
    // 5. 檢查每個 API 的相容性
    const issues: CompatibilityIssue[] = [];
    const fileAnalysis: FileCompatibilityResult[] = [];
  
    for (const [api, locations] of apiUsageMap.entries()) {
      const caniuseId = this.getCaniuseId(api);
      if (!caniuseId) continue;
  
      try {
        const compatibility = await this.canIUseService.checkCompatibility(
          caniuseId,
          browserVersions
        );
  
        if (compatibility.notSupported.length > 0 || compatibility.partialSupport.length > 0) {
          const issue = this.createIssue(api, caniuseId, locations, compatibility);
          issues.push(issue);
        }
      } catch (error) {
        // 忽略無法查詢的 API
        console.warn(`無法查詢 ${api} 的相容性:`, error);
      }
    }
  
    // 6. 按檔案分組問題
    for (const file of parsedFiles) {
      const fileIssues = issues.filter(issue =>
        issue.locations.some(loc => loc.file === file.filePath)
      );
      
      const apisUsed = Array.from(
        new Set(file.apiCalls.map(call => call.method ? `${call.api}.${call.method}` : call.api))
      );
  
      fileAnalysis.push({
        filePath: file.filePath,
        apisUsed,
        issues: fileIssues
      });
    }
  
    // 7. 生成 Polyfill 建議
    const polyfillRecommendations = this.generatePolyfillRecommendations(issues);
  
    // 8. 計算摘要
    const summary = this.generateSummary(apiUsageMap.size, issues);
  
    return {
      summary,
      targetBrowsers,
      browserslistQuery: query,
      issues,
      polyfillRecommendations,
      fileAnalysis
    };
  }

• src/server.ts:174-193 (schema)

  Input schema validation for tool parameters: projectPath (required), browserslistConfig, reportFormat.

  inputSchema: {
    type: 'object',
    properties: {
      projectPath: {
        type: 'string',
        description: '專案目錄路徑',
      },
      browserslistConfig: {
        type: 'string',
        description: 'browserslist 配置字串或檔案路徑',
      },
      reportFormat: {
        type: 'string',
        description: '報告格式',
        enum: ['json', 'markdown', 'html'],
        default: 'markdown'
      }
    },
    required: ['projectPath'],
  },

• src/analyzers/compatibility.ts:722-737 (helper)

  Helper function to format the compatibility analysis results into different report formats (markdown, json, html). Called by the main handler.

  export function formatCompatibilityReport(
    analysis: CompatibilityAnalysis,
    format: ReportFormat = 'markdown'
  ): string {
    switch (format) {
      case 'json':
        return JSON.stringify(analysis, null, 2);
      case 'html':
        return formatAsHtml(analysis);
      case 'text':
        return formatAsText(analysis);
      case 'markdown':
      default:
        return formatAsMarkdown(analysis);
    }
  }