Nexus MCP Server

# Verification Report: Grok 4 Integration **Spec:** `2026-01-11-grok-4-integration` **Date:** 2026-01-11 **Verifier:** implementation-verifier **Status:** Passed --- ## Executive Summary The Grok 4 Integration feature has been successfully implemented and verified. All 16 tasks across 5 task groups are complete, all 670 tests pass with no regressions, and the build succeeds. The implementation adds xAI's Grok 4 model as an alternative option in the search tool with proper type system updates, schema validation, and searchType metadata to distinguish realtime web search from training-data knowledge. --- ## 1. Tasks Verification **Status:** All Complete ### Completed Tasks - [x] Task Group 1: Type Refactoring and Model Configuration - [x] 1.1 Write 4 focused tests for type and configuration changes - [x] 1.2 Rename `PerplexityModelId` to `ModelId` in `/Users/awallis/dev/nexus-mcp/src/types/openrouter.ts` - [x] 1.3 Update `UserFriendlyModelName` type in `/Users/awallis/dev/nexus-mcp/src/constants/models.ts` - [x] 1.4 Rename `PERPLEXITY_MODELS` to `MODELS` in `/Users/awallis/dev/nexus-mcp/src/constants/models.ts` - [x] 1.5 Add Grok 4 to `MODEL_TIMEOUTS` (60000ms) - [x] 1.6 Add Grok 4 to `MODEL_COST_TIERS` (premium) - [x] 1.7 Ensure type system tests pass - [x] Task Group 2: Search Schema Updates - [x] 2.1 Write 3 focused tests for schema validation - [x] 2.2 Update import in `/Users/awallis/dev/nexus-mcp/src/schemas/search.ts` - [x] 2.3 Update `VALID_MODELS` derivation - [x] 2.4 Update model schema description - [x] 2.5 Ensure schema tests pass - [x] Task Group 3: OpenRouter Client and Search Tool Updates - [x] 3.1 Write 5 focused tests for client and search tool changes - [x] 3.2 Update type imports in `/Users/awallis/dev/nexus-mcp/src/tools/search.ts` - [x] 3.3 Update `resolveModelIdentifier` function - [x] 3.4 Update `performActualSearch` method - [x] 3.5 Add `searchType` field to response metadata - [x] 3.6 Update type import in `/Users/awallis/dev/nexus-mcp/src/clients/openrouter.ts` - [x] 3.7 Ensure client and search tool tests pass - [x] Task Group 4: MCP Server Tool Definition Updates - [x] 4.1 Write 3 focused tests for MCP server tool definitions - [x] 4.2 Update tool description in `/Users/awallis/dev/nexus-mcp/src/index.ts` - [x] 4.3 Update model enum in inputSchema - [x] 4.4 Update model description in inputSchema - [x] 4.5 Update search response formatting to include `searchType` - [x] 4.6 Ensure MCP server tests pass - [x] Task Group 5: Test Review and Gap Analysis - [x] 5.1 Review tests from Task Groups 1-4 - [x] 5.2 Analyze test coverage gaps for Grok 4 integration - [x] 5.3 Write up to 5 additional strategic tests - [x] 5.4 Update all references to old type/constant names - [x] 5.5 Run feature-specific tests - [x] 5.6 Run full test suite and fix any regressions ### Incomplete or Issues None - all tasks verified complete. --- ## 2. Documentation Verification **Status:** Issues Found ### Implementation Documentation The `/Users/awallis/dev/nexus-mcp/agent-os/specs/2026-01-11-grok-4-integration/implementation/` folder is empty. No implementation reports were created during the implementation phase. ### Verification Documentation - [x] Final Verification Report: `verifications/final-verification.md` (this document) ### Missing Documentation - Implementation reports for each task group were not created **Note:** While implementation documentation is missing, the implementation itself is complete and verified through code inspection and passing tests. --- ## 3. Roadmap Updates **Status:** Updated ### Updated Roadmap Items - [x] Grok 4 Integration - Add xAI's Grok 4 model as alternative option with searchType metadata distinguishing realtime web search (Perplexity) from training-data knowledge (Grok 4). See `agent-os/specs/2026-01-11-grok-4-integration/`. `M` ### Notes Updated `/Users/awallis/dev/nexus-mcp/agent-os/product/roadmap.md` to mark the Grok 4 Integration feature as complete. --- ## 4. Test Suite Results **Status:** All Passing ### Test Summary - **Total Tests:** 670 (648 unit + 22 integration, plus 1 skipped) - **Passing:** 670 - **Failing:** 0 - **Skipped:** 1 ### Failed Tests None - all tests passing. ### Notes - The test suite includes specific Grok 4 integration tests: - `/Users/awallis/dev/nexus-mcp/tests/unit/tools/search-grok4.test.ts` (5 tests) - `/Users/awallis/dev/nexus-mcp/tests/unit/server/mcp-grok4.test.ts` (3 tests) - `/Users/awallis/dev/nexus-mcp/tests/integration/search-grok4.test.ts` (4 tests) - No references to deprecated `PerplexityModelId` or `PERPLEXITY_MODELS` names remain in the codebase - 80% coverage threshold is maintained --- ## 5. Build Verification **Status:** Passed The build completed successfully with no errors: ``` > nexus-mcp@3.1.0 build > npm-run-all build:clean build:compile build:validate build:cli-setup Build validation - checking dist structure - cli.d.ts, cli.js - clients, config, constants, errors - index.d.ts, index.js - schemas, tools, types, utils ``` --- ## 6. Implementation Summary ### Files Modified | File | Changes | | ------------------------------------------------------ | --------------------------------------------------------------------------------------------------------- | | `/Users/awallis/dev/nexus-mcp/src/types/openrouter.ts` | Renamed `PerplexityModelId` to `ModelId`, added `'x-ai/grok-4'` | | `/Users/awallis/dev/nexus-mcp/src/constants/models.ts` | Renamed `PERPLEXITY_MODELS` to `MODELS`, added Grok 4 config, added `SearchType` and `MODEL_SEARCH_TYPES` | | `/Users/awallis/dev/nexus-mcp/src/schemas/search.ts` | Updated imports to use `MODELS` | | `/Users/awallis/dev/nexus-mcp/src/tools/search.ts` | Updated type imports, added `searchType` to response metadata | | `/Users/awallis/dev/nexus-mcp/src/index.ts` | Updated tool description and model enum to include Grok 4, added `searchType` to output | ### Key Implementation Details 1. **Type System**: `ModelId` type now includes `'x-ai/grok-4'` alongside all Perplexity model identifiers 2. **Configuration**: Grok 4 has 60s timeout (same as sonar-pro) and premium cost tier 3. **Search Type Metadata**: New `searchType` field distinguishes `'realtime'` (Perplexity) from `'training-data'` (Grok 4) 4. **Backwards Compatibility**: Default model remains `'sonar'` for existing users