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DollhouseMCP - A Model Context Protocol (MCP) server that enables dynamic AI persona management from markdown files, allowing Claude and other compatible AI assistants to activate and switch between different behavioral personas.

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/** * Capability Index Resource Handler * * Exposes the capability index as an MCP resource for injection into LLM context. * Provides both summary (action_triggers only) and full index variants. * * ⚠️ MERGE STATUS: PORTED BUT NOT INTEGRATED (October 2025) * * This file was ported from main branch (v1.9.18-v1.9.24) but is NOT currently * integrated into the refactored DI architecture. Integration is planned for a * future phase once the Enhanced Index system is fully operational. * * CURRENT STATE: * - ✅ File ported and preserved for future use * - ❌ NOT registered in DI Container * - ❌ NOT registered with MCP server * - ❌ NOT accessible to users * * ⚠️ ORIGINAL STATUS: NON-FUNCTIONAL IN CLAUDE CODE (October 2025) * * This is a FUTURE-PROOF implementation. MCP Resources are currently: * - ✅ Fully implemented and MCP specification compliant * - ❌ NOT working in Claude Code (discovery only, never read) * - ⚠️ Manual attachment only in Claude Desktop/VS Code * * WHY IMPLEMENT NOW? * - Early adopter advantage when clients add full support * - Manual attachment works in Claude Desktop/VS Code * - Zero overhead when disabled (default configuration) * * DEFAULT: DISABLED FOR SAFETY * Resources are disabled by default to avoid token overhead and ensure * no surprises for users. Must be explicitly enabled in configuration. * * WHEN WILL THIS BE USEFUL? * When Claude Code and other MCP clients implement the missing * resources/read functionality and automatic resource injection. * Expected timeline: Unknown. * * For detailed research, see: * docs/development/MCP_RESOURCES_SUPPORT_RESEARCH_2025-10-16.md * * For user documentation, see: * docs/configuration/MCP_RESOURCES.md * * FUTURE INTEGRATION TASKS: * - [ ] Register in DI Container (src/di/Container.ts) * - [ ] Add configuration option for enabling resources * - [ ] Register resource handlers with MCP server when enabled * - [ ] Add unit tests for resource generation * - [ ] Add integration tests for MCP resource protocol */ // FIX: Added node: prefix to built-in Node.js imports // Previously: import fs from 'fs/promises'; etc. // Now: import fs from 'node:fs/promises'; for Node.js convention import path from 'node:path'; import yaml from 'js-yaml'; import os from 'node:os'; import { logger } from '../../utils/logger.js'; /** * Capability Index Resource Handler * * Provides three MCP resources: * 1. Summary (~2.5-3.5K tokens) - action_triggers only * 2. Full (~35-45K tokens) - complete index with all details * 3. Stats (JSON) - size metrics and token estimates * * WHY DISABLED BY DEFAULT: * 1. Current MCP clients don't actually read resources (Claude Code discovery only) * 2. Avoids unexpected token overhead when clients do implement reading * 3. Provides opt-in behavior for users who want to test manually in Claude Desktop * * TO ENABLE: * Set in config: resources.enabled = true * Or environment: DOLLHOUSE_RESOURCES_ENABLED=true * * NOTE: This class always provides resource handlers for MCP protocol compliance, * but the resources are only registered with the MCP server if explicitly enabled. */ export class CapabilityIndexResource { capabilityIndexPath; cachedIndex = null; cacheTimestamp = 0; CACHE_TTL = 60000; // 60 seconds fileOperations; constructor(fileOperations) { this.fileOperations = fileOperations; // Respect environment variable if set (for testing), otherwise use default const portfolioDir = process.env.DOLLHOUSE_PORTFOLIO_DIR || path.join(os.homedir(), '.dollhouse', 'portfolio'); this.capabilityIndexPath = path.join(portfolioDir, 'capability-index.yaml'); } /** * Load and parse capability index from filesystem * Uses 60-second cache to avoid excessive file reads * * @returns Parsed capability index * @throws Error if file cannot be read or parsed */ async loadCapabilityIndex() { const now = Date.now(); // Return cached version if still valid if (this.cachedIndex && (now - this.cacheTimestamp) < this.CACHE_TTL) { return this.cachedIndex; } try { // Check if file exists const fileExists = await this.fileOperations.exists(this.capabilityIndexPath); if (!fileExists) { throw new Error(`Capability index not found at ${this.capabilityIndexPath}`); } // Read and parse YAML with safe schema to prevent code execution const content = await this.fileOperations.readFile(this.capabilityIndexPath, { source: 'CapabilityIndexResource.loadCapabilityIndex' }); const parsed = yaml.load(content, { schema: yaml.FAILSAFE_SCHEMA }); // Cache the result this.cachedIndex = parsed; this.cacheTimestamp = now; logger.info(`Loaded capability index: ${parsed.metadata.total_elements} elements`); return parsed; } catch (error) { const errorMessage = error instanceof Error ? error.message : String(error); logger.error(`Failed to load capability index: ${errorMessage}`); throw new Error(`Capability index not available: ${errorMessage}`); } } /** * Generate summary version of capability index (metadata + action_triggers only) * Estimated: 2,500-3,500 tokens * * @returns YAML string with header and summary content */ async generateSummary() { const index = await this.loadCapabilityIndex(); const summary = { metadata: index.metadata, action_triggers: index.action_triggers }; // Convert to YAML for readability const yamlContent = yaml.dump(summary, { indent: 2, lineWidth: 120, noRefs: true }); // Add header comment const header = `# Capability Index Summary # This is a lightweight summary of the capability index for LLM context injection. # Contains action verb → element mappings for quick tool selection guidance. # Full index available at: dollhouse://capability-index/full # Total elements: ${index.metadata.total_elements} `; return header + yamlContent; } /** * Generate full capability index * Estimated: 35,000-45,000 tokens * * @returns YAML string with header and full index content */ async generateFull() { const index = await this.loadCapabilityIndex(); // Convert to YAML for readability const yamlContent = yaml.dump(index, { indent: 2, lineWidth: 120, noRefs: true }); // Add header comment const header = `# Capability Index (Full) # Complete capability index including all element details, relationships, and semantic data. # This is a large resource (~35-45K tokens) - use only with large context models. # Summary version available at: dollhouse://capability-index/summary # Total elements: ${index.metadata.total_elements} `; return header + yamlContent; } /** * Get statistics about the capability index for measurement * Provides size metrics and rough token estimates using: * (chars/4 + words*1.3)/2 formula * * @returns Statistics object with size and token estimates */ async getStatistics() { const summary = await this.generateSummary(); const full = await this.generateFull(); return { summarySize: summary.length, summaryWords: summary.split(/\s+/).length, summaryLines: summary.split('\n').length, fullSize: full.length, fullWords: full.split(/\s+/).length, fullLines: full.split('\n').length, // Rough token estimates (chars/4 + words*1.3)/2 estimatedSummaryTokens: Math.round((summary.length / 4 + summary.split(/\s+/).length * 1.3) / 2), estimatedFullTokens: Math.round((full.length / 4 + full.split(/\s+/).length * 1.3) / 2) }; } /** * MCP Resource Handler: List available resources * * Returns three resources: * - summary: Lightweight index (~2.5-3.5K tokens) * - full: Complete index (~35-45K tokens) * - stats: Size and token metrics (JSON) * * @returns Resource list with URIs, names, descriptions, and MIME types */ async listResources() { return { resources: [ { uri: 'dollhouse://capability-index/summary', name: 'Capability Index Summary', description: 'Lightweight capability index with action verb → element mappings. Estimated ~2.5-3.5K tokens. Recommended for models with 200K+ context.', mimeType: 'text/yaml' }, { uri: 'dollhouse://capability-index/full', name: 'Capability Index (Full)', description: 'Complete capability index with all element details, relationships, and semantic data. Estimated ~35-45K tokens. Recommended for models with 500K+ context.', mimeType: 'text/yaml' }, { uri: 'dollhouse://capability-index/stats', name: 'Capability Index Statistics', description: 'Measurement data about capability index size and token estimates.', mimeType: 'application/json' } ] }; } /** * MCP Resource Handler: Read a specific resource * * @param uri - Resource URI to read (must match one from listResources) * @returns Resource content with URI, MIME type, and text * @throws Error if URI is not recognized */ async readResource(uri) { let content; let mimeType; switch (uri) { case 'dollhouse://capability-index/summary': content = await this.generateSummary(); mimeType = 'text/yaml'; break; case 'dollhouse://capability-index/full': content = await this.generateFull(); mimeType = 'text/yaml'; break; case 'dollhouse://capability-index/stats': { // FIX: Wrapped lexical declaration in curly braces // Previously: const declaration in case block without braces // Now: Properly scoped with block statement const stats = await this.getStatistics(); content = JSON.stringify(stats, null, 2); mimeType = 'application/json'; break; } default: throw new Error(`Unknown capability index resource: ${uri}`); } return { contents: [ { uri, mimeType, text: content } ] }; } } //# 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* Capability Index Resource Handler\n *\n * Exposes the capability index as an MCP resource for injection into LLM context.\n * Provides both summary (action_triggers only) and full index variants.\n *\n * ⚠️ MERGE STATUS: PORTED BUT NOT INTEGRATED (October 2025)\n *\n * This file was ported from main branch (v1.9.18-v1.9.24) but is NOT currently\n * integrated into the refactored DI architecture. Integration is planned for a\n * future phase once the Enhanced Index system is fully operational.\n *\n * CURRENT STATE:\n * - ✅ File ported and preserved for future use\n * - ❌ NOT registered in DI Container\n * - ❌ NOT registered with MCP server\n * - ❌ NOT accessible to users\n *\n * ⚠️ ORIGINAL STATUS: NON-FUNCTIONAL IN CLAUDE CODE (October 2025)\n *\n * This is a FUTURE-PROOF implementation. MCP Resources are currently:\n * - ✅ Fully implemented and MCP specification compliant\n * - ❌ NOT working in Claude Code (discovery only, never read)\n * - ⚠️ Manual attachment only in Claude Desktop/VS Code\n *\n * WHY IMPLEMENT NOW?\n * - Early adopter advantage when clients add full support\n * - Manual attachment works in Claude Desktop/VS Code\n * - Zero overhead when disabled (default configuration)\n *\n * DEFAULT: DISABLED FOR SAFETY\n * Resources are disabled by default to avoid token overhead and ensure\n * no surprises for users. Must be explicitly enabled in configuration.\n *\n * WHEN WILL THIS BE USEFUL?\n * When Claude Code and other MCP clients implement the missing\n * resources/read functionality and automatic resource injection.\n * Expected timeline: Unknown.\n *\n * For detailed research, see:\n * docs/development/MCP_RESOURCES_SUPPORT_RESEARCH_2025-10-16.md\n *\n * For user documentation, see:\n * docs/configuration/MCP_RESOURCES.md\n *\n * FUTURE INTEGRATION TASKS:\n * - [ ] Register in DI Container (src/di/Container.ts)\n * - [ ] Add configuration option for enabling resources\n * - [ ] Register resource handlers with MCP server when enabled\n * - [ ] Add unit tests for resource generation\n * - [ ] Add integration tests for MCP resource protocol\n */\n\n// FIX: Added node: prefix to built-in Node.js imports\n// Previously: import fs from 'fs/promises'; etc.\n// Now: import fs from 'node:fs/promises'; for Node.js convention\nimport path from 'node:path';\nimport yaml from 'js-yaml';\nimport os from 'node:os';\nimport { logger } from '../../utils/logger.js';\nimport { IFileOperationsService } from '../../services/FileOperationsService.js';\n\n/**\n * Metadata about the capability index\n */\ninterface CapabilityIndexMetadata {\n  version: string;\n  created: string;\n  last_updated: string;\n  total_elements: number;\n}\n\n/**\n * Full capability index structure\n */\ninterface CapabilityIndex {\n  metadata: CapabilityIndexMetadata;\n  action_triggers: Record<string, string[]>;\n  elements?: any; // Large section we might exclude in summary\n}\n\n/**\n * Statistics about the capability index size and token estimates\n */\ninterface CapabilityIndexStatistics {\n  summarySize: number;\n  summaryWords: number;\n  summaryLines: number;\n  fullSize: number;\n  fullWords: number;\n  fullLines: number;\n  estimatedSummaryTokens: number;\n  estimatedFullTokens: number;\n}\n\n/**\n * MCP Resource structure\n */\ninterface MCPResource {\n  uri: string;\n  name: string;\n  description: string;\n  mimeType: string;\n}\n\n/**\n * MCP Resource list response\n */\ninterface MCPResourceListResponse {\n  resources: MCPResource[];\n}\n\n/**\n * MCP Resource content item\n */\ninterface MCPResourceContent {\n  uri: string;\n  mimeType: string;\n  text: string;\n}\n\n/**\n * MCP Resource read response\n */\ninterface MCPResourceReadResponse {\n  contents: MCPResourceContent[];\n}\n\n/**\n * Capability Index Resource Handler\n *\n * Provides three MCP resources:\n * 1. Summary (~2.5-3.5K tokens) - action_triggers only\n * 2. Full (~35-45K tokens) - complete index with all details\n * 3. Stats (JSON) - size metrics and token estimates\n *\n * WHY DISABLED BY DEFAULT:\n * 1. Current MCP clients don't actually read resources (Claude Code discovery only)\n * 2. Avoids unexpected token overhead when clients do implement reading\n * 3. Provides opt-in behavior for users who want to test manually in Claude Desktop\n *\n * TO ENABLE:\n * Set in config: resources.enabled = true\n * Or environment: DOLLHOUSE_RESOURCES_ENABLED=true\n *\n * NOTE: This class always provides resource handlers for MCP protocol compliance,\n * but the resources are only registered with the MCP server if explicitly enabled.\n */\nexport class CapabilityIndexResource {\n  private readonly capabilityIndexPath: string;\n  private cachedIndex: CapabilityIndex | null = null;\n  private cacheTimestamp: number = 0;\n  private readonly CACHE_TTL = 60000; // 60 seconds\n  private readonly fileOperations: IFileOperationsService;\n\n  constructor(fileOperations: IFileOperationsService) {\n    this.fileOperations = fileOperations;\n\n    // Respect environment variable if set (for testing), otherwise use default\n    const portfolioDir = process.env.DOLLHOUSE_PORTFOLIO_DIR\n      || path.join(os.homedir(), '.dollhouse', 'portfolio');\n\n    this.capabilityIndexPath = path.join(\n      portfolioDir,\n      'capability-index.yaml'\n    );\n  }\n\n  /**\n   * Load and parse capability index from filesystem\n   * Uses 60-second cache to avoid excessive file reads\n   *\n   * @returns Parsed capability index\n   * @throws Error if file cannot be read or parsed\n   */\n  private async loadCapabilityIndex(): Promise<CapabilityIndex> {\n    const now = Date.now();\n\n    // Return cached version if still valid\n    if (this.cachedIndex && (now - this.cacheTimestamp) < this.CACHE_TTL) {\n      return this.cachedIndex;\n    }\n\n    try {\n      // Check if file exists\n      const fileExists = await this.fileOperations.exists(this.capabilityIndexPath);\n      if (!fileExists) {\n        throw new Error(`Capability index not found at ${this.capabilityIndexPath}`);\n      }\n\n      // Read and parse YAML with safe schema to prevent code execution\n      const content = await this.fileOperations.readFile(this.capabilityIndexPath, {\n        source: 'CapabilityIndexResource.loadCapabilityIndex'\n      });\n      const parsed = yaml.load(content, { schema: yaml.FAILSAFE_SCHEMA }) as CapabilityIndex;\n\n      // Cache the result\n      this.cachedIndex = parsed;\n      this.cacheTimestamp = now;\n\n      logger.info(`Loaded capability index: ${parsed.metadata.total_elements} elements`);\n\n      return parsed;\n    } catch (error) {\n      const errorMessage = error instanceof Error ? error.message : String(error);\n      logger.error(`Failed to load capability index: ${errorMessage}`);\n      throw new Error(`Capability index not available: ${errorMessage}`);\n    }\n  }\n\n  /**\n   * Generate summary version of capability index (metadata + action_triggers only)\n   * Estimated: 2,500-3,500 tokens\n   *\n   * @returns YAML string with header and summary content\n   */\n  async generateSummary(): Promise<string> {\n    const index = await this.loadCapabilityIndex();\n\n    const summary = {\n      metadata: index.metadata,\n      action_triggers: index.action_triggers\n    };\n\n    // Convert to YAML for readability\n    const yamlContent = yaml.dump(summary, {\n      indent: 2,\n      lineWidth: 120,\n      noRefs: true\n    });\n\n    // Add header comment\n    const header = `# Capability Index Summary\n# This is a lightweight summary of the capability index for LLM context injection.\n# Contains action verb → element mappings for quick tool selection guidance.\n# Full index available at: dollhouse://capability-index/full\n# Total elements: ${index.metadata.total_elements}\n\n`;\n\n    return header + yamlContent;\n  }\n\n  /**\n   * Generate full capability index\n   * Estimated: 35,000-45,000 tokens\n   *\n   * @returns YAML string with header and full index content\n   */\n  async generateFull(): Promise<string> {\n    const index = await this.loadCapabilityIndex();\n\n    // Convert to YAML for readability\n    const yamlContent = yaml.dump(index, {\n      indent: 2,\n      lineWidth: 120,\n      noRefs: true\n    });\n\n    // Add header comment\n    const header = `# Capability Index (Full)\n# Complete capability index including all element details, relationships, and semantic data.\n# This is a large resource (~35-45K tokens) - use only with large context models.\n# Summary version available at: dollhouse://capability-index/summary\n# Total elements: ${index.metadata.total_elements}\n\n`;\n\n    return header + yamlContent;\n  }\n\n  /**\n   * Get statistics about the capability index for measurement\n   * Provides size metrics and rough token estimates using:\n   * (chars/4 + words*1.3)/2 formula\n   *\n   * @returns Statistics object with size and token estimates\n   */\n  async getStatistics(): Promise<CapabilityIndexStatistics> {\n    const summary = await this.generateSummary();\n    const full = await this.generateFull();\n\n    return {\n      summarySize: summary.length,\n      summaryWords: summary.split(/\\s+/).length,\n      summaryLines: summary.split('\\n').length,\n      fullSize: full.length,\n      fullWords: full.split(/\\s+/).length,\n      fullLines: full.split('\\n').length,\n      // Rough token estimates (chars/4 + words*1.3)/2\n      estimatedSummaryTokens: Math.round((summary.length / 4 + summary.split(/\\s+/).length * 1.3) / 2),\n      estimatedFullTokens: Math.round((full.length / 4 + full.split(/\\s+/).length * 1.3) / 2)\n    };\n  }\n\n  /**\n   * MCP Resource Handler: List available resources\n   *\n   * Returns three resources:\n   * - summary: Lightweight index (~2.5-3.5K tokens)\n   * - full: Complete index (~35-45K tokens)\n   * - stats: Size and token metrics (JSON)\n   *\n   * @returns Resource list with URIs, names, descriptions, and MIME types\n   */\n  async listResources(): Promise<MCPResourceListResponse> {\n    return {\n      resources: [\n        {\n          uri: 'dollhouse://capability-index/summary',\n          name: 'Capability Index Summary',\n          description: 'Lightweight capability index with action verb → element mappings. Estimated ~2.5-3.5K tokens. Recommended for models with 200K+ context.',\n          mimeType: 'text/yaml'\n        },\n        {\n          uri: 'dollhouse://capability-index/full',\n          name: 'Capability Index (Full)',\n          description: 'Complete capability index with all element details, relationships, and semantic data. Estimated ~35-45K tokens. Recommended for models with 500K+ context.',\n          mimeType: 'text/yaml'\n        },\n        {\n          uri: 'dollhouse://capability-index/stats',\n          name: 'Capability Index Statistics',\n          description: 'Measurement data about capability index size and token estimates.',\n          mimeType: 'application/json'\n        }\n      ]\n    };\n  }\n\n  /**\n   * MCP Resource Handler: Read a specific resource\n   *\n   * @param uri - Resource URI to read (must match one from listResources)\n   * @returns Resource content with URI, MIME type, and text\n   * @throws Error if URI is not recognized\n   */\n  async readResource(uri: string): Promise<MCPResourceReadResponse> {\n    let content: string;\n    let mimeType: string;\n\n    switch (uri) {\n      case 'dollhouse://capability-index/summary':\n        content = await this.generateSummary();\n        mimeType = 'text/yaml';\n        break;\n\n      case 'dollhouse://capability-index/full':\n        content = await this.generateFull();\n        mimeType = 'text/yaml';\n        break;\n\n      case 'dollhouse://capability-index/stats': {\n        // FIX: Wrapped lexical declaration in curly braces\n        // Previously: const declaration in case block without braces\n        // Now: Properly scoped with block statement\n        const stats = await this.getStatistics();\n        content = JSON.stringify(stats, null, 2);\n        mimeType = 'application/json';\n        break;\n      }\n\n      default:\n        throw new Error(`Unknown capability index resource: ${uri}`);\n    }\n\n    return {\n      contents: [\n        {\n          uri,\n          mimeType,\n          text: content\n        }\n      ]\n    };\n  }\n}\n"]}