CTS MCP Server

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<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/sampling/index.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">src/sampling</a> index.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 100% Statements 37/37 </div> <div class='fl pad1y space-right2'> 84.61% Branches 11/13 </div> <div class='fl pad1y space-right2'> 100% Functions 8/8 </div> <div class='fl pad1y space-right2'> 100% Lines 37/37 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous 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lang-js">/** * MCP Sampling Protocol Implementation * Handles long-running operations and large responses via sampling * * Following MCP Specification: * https://spec.modelcontextprotocol.io/specification/server/sampling/ */   import { z } from 'zod';   /** * Sampling request from client */ export const SamplingRequestSchema = z.object({ method: z.literal('sampling/createMessage'), params: z.object({ messages: z.array(z.object({ role: z.enum(['user', 'assistant']), content: z.string(), })), maxTokens: z.number().optional(), temperature: z.number().min(0).max(2).optional(), stopSequences: z.array(z.string()).optional(), }), });   export type SamplingRequest = z.infer<typeof SamplingRequestSchema>;   /** * Chunked response for large data */ export interface ChunkedResponse<T> { chunk: number; totalChunks: number; data: Partial<T>; complete: boolean; }   /** * Sampling state for long-running operations */ export interface SamplingState { operationId: string; startTime: number; estimatedDuration?: number; progress?: number; // 0-100 status: 'running' | 'completed' | 'failed'; result?: unknown; error?: string; }   /** * Chunk large responses to avoid stdio buffer overflow * * Strategy: For very large responses, return a summary with a flag * indicating full data is too large. Client can request specific parts. * * @param data - Data to check size * @param maxSize - Maximum size in bytes before truncating * @returns Response with truncation flag if needed */ export function checkResponseSize<T>( data: T, maxSize: number = 60000 ): { data: T; truncated: boolean; originalSize: number } { const serialized = JSON.stringify(data); const size = serialized.length; return { data, truncated: size > maxSize, originalSize: size, }; }   /** * Create truncated version of large responses * For audit reports, violations, etc. */ export function truncateLargeArrays<T extends Record<string, unknown>>( data: T, maxArrayLength: number = 10 ): T & { _truncated?: string[] } { const result = { ...data } as T & { _truncated?: string[] }; const truncatedFields: string[] = []; for (const [key, value] of Object.entries(data)) { if (Array.isArray(value) && value.length > maxArrayLength) { (result as any)[key] = value.slice(0, maxArrayLength); truncatedFields.push(`${key} (${value.length} total, showing ${maxArrayLength})`); } } if (truncatedFields.length > 0) { result._truncated = truncatedFields; } return result; }   /** * Sampling manager for long-running operations */ export class SamplingManager { private operations: Map<string, SamplingState> = new Map(); /** * Start a long-running operation */ startOperation(operationId: string, estimatedDuration?: number): void { this.operations.set(operationId, { operationId, startTime: Date.now(), estimatedDuration, status: 'running', }); } /** * Update operation progress */ updateProgress(operationId: string, progress: number): void { const state = this.operations.get(operationId); if (state) { state.progress = Math.min(100, Math.max(0, progress)); } } /** * Complete operation with result */ completeOperation(operationId: string, result: unknown): void { const state = this.operations.get(operationId); if (state) { state.status = 'completed'; state.result = result; state.progress = 100; } } /** * Fail operation with error */ failOperation(operationId: string, error: string): void { const state = this.operations.get(operationId); if (state) { state.status = 'failed'; state.error = error; } } /** * Get operation state */ getState(operationId: string): SamplingState | undefined { return this.operations.get(operationId); } /** * Clean up completed operations older than TTL */ cleanup(ttlMs: number = 300000): void { const now = Date.now(); for (const [id, state] of this.operations) { if (state.status !== 'running' && now - state.startTime > ttlMs) { this.operations.delete(id); } } } }   /** * Global sampling manager instance */ export const samplingManager = new SamplingManager();  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-11-02T03:07:00.759Z </div> <script src="../../prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="../../sorter.js"></script> <script src="../../block-navigation.js"></script> </body> </html>

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