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# Directory Structure
```
├── _config.yml
├── .claude
│ └── agents
│ ├── code-reviewer.md
│ ├── context-manager.md
│ ├── debugger.md
│ ├── deployment-engineer.md
│ ├── mcp-backend-engineer.md
│ ├── n8n-mcp-tester.md
│ ├── technical-researcher.md
│ └── test-automator.md
├── .dockerignore
├── .env.docker
├── .env.example
├── .env.n8n.example
├── .env.test
├── .env.test.example
├── .github
│ ├── ABOUT.md
│ ├── BENCHMARK_THRESHOLDS.md
│ ├── FUNDING.yml
│ ├── gh-pages.yml
│ ├── secret_scanning.yml
│ └── workflows
│ ├── benchmark-pr.yml
│ ├── benchmark.yml
│ ├── docker-build-fast.yml
│ ├── docker-build-n8n.yml
│ ├── docker-build.yml
│ ├── release.yml
│ ├── test.yml
│ └── update-n8n-deps.yml
├── .gitignore
├── .npmignore
├── ATTRIBUTION.md
├── CHANGELOG.md
├── CLAUDE.md
├── codecov.yml
├── coverage.json
├── data
│ ├── .gitkeep
│ ├── nodes.db
│ ├── nodes.db-shm
│ ├── nodes.db-wal
│ └── templates.db
├── deploy
│ └── quick-deploy-n8n.sh
├── docker
│ ├── docker-entrypoint.sh
│ ├── n8n-mcp
│ ├── parse-config.js
│ └── README.md
├── docker-compose.buildkit.yml
├── docker-compose.extract.yml
├── docker-compose.n8n.yml
├── docker-compose.override.yml.example
├── docker-compose.test-n8n.yml
├── docker-compose.yml
├── Dockerfile
├── Dockerfile.railway
├── Dockerfile.test
├── docs
│ ├── AUTOMATED_RELEASES.md
│ ├── BENCHMARKS.md
│ ├── CHANGELOG.md
│ ├── CLAUDE_CODE_SETUP.md
│ ├── CLAUDE_INTERVIEW.md
│ ├── CODECOV_SETUP.md
│ ├── CODEX_SETUP.md
│ ├── CURSOR_SETUP.md
│ ├── DEPENDENCY_UPDATES.md
│ ├── DOCKER_README.md
│ ├── DOCKER_TROUBLESHOOTING.md
│ ├── FINAL_AI_VALIDATION_SPEC.md
│ ├── FLEXIBLE_INSTANCE_CONFIGURATION.md
│ ├── HTTP_DEPLOYMENT.md
│ ├── img
│ │ ├── cc_command.png
│ │ ├── cc_connected.png
│ │ ├── codex_connected.png
│ │ ├── cursor_tut.png
│ │ ├── Railway_api.png
│ │ ├── Railway_server_address.png
│ │ ├── vsc_ghcp_chat_agent_mode.png
│ │ ├── vsc_ghcp_chat_instruction_files.png
│ │ ├── vsc_ghcp_chat_thinking_tool.png
│ │ └── windsurf_tut.png
│ ├── INSTALLATION.md
│ ├── LIBRARY_USAGE.md
│ ├── local
│ │ ├── DEEP_DIVE_ANALYSIS_2025-10-02.md
│ │ ├── DEEP_DIVE_ANALYSIS_README.md
│ │ ├── Deep_dive_p1_p2.md
│ │ ├── integration-testing-plan.md
│ │ ├── integration-tests-phase1-summary.md
│ │ ├── N8N_AI_WORKFLOW_BUILDER_ANALYSIS.md
│ │ ├── P0_IMPLEMENTATION_PLAN.md
│ │ └── TEMPLATE_MINING_ANALYSIS.md
│ ├── MCP_ESSENTIALS_README.md
│ ├── MCP_QUICK_START_GUIDE.md
│ ├── N8N_DEPLOYMENT.md
│ ├── RAILWAY_DEPLOYMENT.md
│ ├── README_CLAUDE_SETUP.md
│ ├── README.md
│ ├── tools-documentation-usage.md
│ ├── VS_CODE_PROJECT_SETUP.md
│ ├── WINDSURF_SETUP.md
│ └── workflow-diff-examples.md
├── examples
│ └── enhanced-documentation-demo.js
├── fetch_log.txt
├── LICENSE
├── MEMORY_N8N_UPDATE.md
├── MEMORY_TEMPLATE_UPDATE.md
├── monitor_fetch.sh
├── N8N_HTTP_STREAMABLE_SETUP.md
├── n8n-nodes.db
├── P0-R3-TEST-PLAN.md
├── package-lock.json
├── package.json
├── package.runtime.json
├── PRIVACY.md
├── railway.json
├── README.md
├── renovate.json
├── scripts
│ ├── analyze-optimization.sh
│ ├── audit-schema-coverage.ts
│ ├── build-optimized.sh
│ ├── compare-benchmarks.js
│ ├── demo-optimization.sh
│ ├── deploy-http.sh
│ ├── deploy-to-vm.sh
│ ├── export-webhook-workflows.ts
│ ├── extract-changelog.js
│ ├── extract-from-docker.js
│ ├── extract-nodes-docker.sh
│ ├── extract-nodes-simple.sh
│ ├── format-benchmark-results.js
│ ├── generate-benchmark-stub.js
│ ├── generate-detailed-reports.js
│ ├── generate-test-summary.js
│ ├── http-bridge.js
│ ├── mcp-http-client.js
│ ├── migrate-nodes-fts.ts
│ ├── migrate-tool-docs.ts
│ ├── n8n-docs-mcp.service
│ ├── nginx-n8n-mcp.conf
│ ├── prebuild-fts5.ts
│ ├── prepare-release.js
│ ├── publish-npm-quick.sh
│ ├── publish-npm.sh
│ ├── quick-test.ts
│ ├── run-benchmarks-ci.js
│ ├── sync-runtime-version.js
│ ├── test-ai-validation-debug.ts
│ ├── test-code-node-enhancements.ts
│ ├── test-code-node-fixes.ts
│ ├── test-docker-config.sh
│ ├── test-docker-fingerprint.ts
│ ├── test-docker-optimization.sh
│ ├── test-docker.sh
│ ├── test-empty-connection-validation.ts
│ ├── test-error-message-tracking.ts
│ ├── test-error-output-validation.ts
│ ├── test-error-validation.js
│ ├── test-essentials.ts
│ ├── test-expression-code-validation.ts
│ ├── test-expression-format-validation.js
│ ├── test-fts5-search.ts
│ ├── test-fuzzy-fix.ts
│ ├── test-fuzzy-simple.ts
│ ├── test-helpers-validation.ts
│ ├── test-http-search.ts
│ ├── test-http.sh
│ ├── test-jmespath-validation.ts
│ ├── test-multi-tenant-simple.ts
│ ├── test-multi-tenant.ts
│ ├── test-n8n-integration.sh
│ ├── test-node-info.js
│ ├── test-node-type-validation.ts
│ ├── test-nodes-base-prefix.ts
│ ├── test-operation-validation.ts
│ ├── test-optimized-docker.sh
│ ├── test-release-automation.js
│ ├── test-search-improvements.ts
│ ├── test-security.ts
│ ├── test-single-session.sh
│ ├── test-sqljs-triggers.ts
│ ├── test-telemetry-debug.ts
│ ├── test-telemetry-direct.ts
│ ├── test-telemetry-env.ts
│ ├── test-telemetry-integration.ts
│ ├── test-telemetry-no-select.ts
│ ├── test-telemetry-security.ts
│ ├── test-telemetry-simple.ts
│ ├── test-typeversion-validation.ts
│ ├── test-url-configuration.ts
│ ├── test-user-id-persistence.ts
│ ├── test-webhook-validation.ts
│ ├── test-workflow-insert.ts
│ ├── test-workflow-sanitizer.ts
│ ├── test-workflow-tracking-debug.ts
│ ├── update-and-publish-prep.sh
│ ├── update-n8n-deps.js
│ ├── update-readme-version.js
│ ├── vitest-benchmark-json-reporter.js
│ └── vitest-benchmark-reporter.ts
├── SECURITY.md
├── src
│ ├── config
│ │ └── n8n-api.ts
│ ├── data
│ │ └── canonical-ai-tool-examples.json
│ ├── database
│ │ ├── database-adapter.ts
│ │ ├── migrations
│ │ │ └── add-template-node-configs.sql
│ │ ├── node-repository.ts
│ │ ├── nodes.db
│ │ ├── schema-optimized.sql
│ │ └── schema.sql
│ ├── errors
│ │ └── validation-service-error.ts
│ ├── http-server-single-session.ts
│ ├── http-server.ts
│ ├── index.ts
│ ├── loaders
│ │ └── node-loader.ts
│ ├── mappers
│ │ └── docs-mapper.ts
│ ├── mcp
│ │ ├── handlers-n8n-manager.ts
│ │ ├── handlers-workflow-diff.ts
│ │ ├── index.ts
│ │ ├── server.ts
│ │ ├── stdio-wrapper.ts
│ │ ├── tool-docs
│ │ │ ├── configuration
│ │ │ │ ├── get-node-as-tool-info.ts
│ │ │ │ ├── get-node-documentation.ts
│ │ │ │ ├── get-node-essentials.ts
│ │ │ │ ├── get-node-info.ts
│ │ │ │ ├── get-property-dependencies.ts
│ │ │ │ ├── index.ts
│ │ │ │ └── search-node-properties.ts
│ │ │ ├── discovery
│ │ │ │ ├── get-database-statistics.ts
│ │ │ │ ├── index.ts
│ │ │ │ ├── list-ai-tools.ts
│ │ │ │ ├── list-nodes.ts
│ │ │ │ └── search-nodes.ts
│ │ │ ├── guides
│ │ │ │ ├── ai-agents-guide.ts
│ │ │ │ └── index.ts
│ │ │ ├── index.ts
│ │ │ ├── system
│ │ │ │ ├── index.ts
│ │ │ │ ├── n8n-diagnostic.ts
│ │ │ │ ├── n8n-health-check.ts
│ │ │ │ ├── n8n-list-available-tools.ts
│ │ │ │ └── tools-documentation.ts
│ │ │ ├── templates
│ │ │ │ ├── get-template.ts
│ │ │ │ ├── get-templates-for-task.ts
│ │ │ │ ├── index.ts
│ │ │ │ ├── list-node-templates.ts
│ │ │ │ ├── list-tasks.ts
│ │ │ │ ├── search-templates-by-metadata.ts
│ │ │ │ └── search-templates.ts
│ │ │ ├── types.ts
│ │ │ ├── validation
│ │ │ │ ├── index.ts
│ │ │ │ ├── validate-node-minimal.ts
│ │ │ │ ├── validate-node-operation.ts
│ │ │ │ ├── validate-workflow-connections.ts
│ │ │ │ ├── validate-workflow-expressions.ts
│ │ │ │ └── validate-workflow.ts
│ │ │ └── workflow_management
│ │ │ ├── index.ts
│ │ │ ├── n8n-autofix-workflow.ts
│ │ │ ├── n8n-create-workflow.ts
│ │ │ ├── n8n-delete-execution.ts
│ │ │ ├── n8n-delete-workflow.ts
│ │ │ ├── n8n-get-execution.ts
│ │ │ ├── n8n-get-workflow-details.ts
│ │ │ ├── n8n-get-workflow-minimal.ts
│ │ │ ├── n8n-get-workflow-structure.ts
│ │ │ ├── n8n-get-workflow.ts
│ │ │ ├── n8n-list-executions.ts
│ │ │ ├── n8n-list-workflows.ts
│ │ │ ├── n8n-trigger-webhook-workflow.ts
│ │ │ ├── n8n-update-full-workflow.ts
│ │ │ ├── n8n-update-partial-workflow.ts
│ │ │ └── n8n-validate-workflow.ts
│ │ ├── tools-documentation.ts
│ │ ├── tools-n8n-friendly.ts
│ │ ├── tools-n8n-manager.ts
│ │ ├── tools.ts
│ │ └── workflow-examples.ts
│ ├── mcp-engine.ts
│ ├── mcp-tools-engine.ts
│ ├── n8n
│ │ ├── MCPApi.credentials.ts
│ │ └── MCPNode.node.ts
│ ├── parsers
│ │ ├── node-parser.ts
│ │ ├── property-extractor.ts
│ │ └── simple-parser.ts
│ ├── scripts
│ │ ├── debug-http-search.ts
│ │ ├── extract-from-docker.ts
│ │ ├── fetch-templates-robust.ts
│ │ ├── fetch-templates.ts
│ │ ├── rebuild-database.ts
│ │ ├── rebuild-optimized.ts
│ │ ├── rebuild.ts
│ │ ├── sanitize-templates.ts
│ │ ├── seed-canonical-ai-examples.ts
│ │ ├── test-autofix-documentation.ts
│ │ ├── test-autofix-workflow.ts
│ │ ├── test-execution-filtering.ts
│ │ ├── test-node-suggestions.ts
│ │ ├── test-protocol-negotiation.ts
│ │ ├── test-summary.ts
│ │ ├── test-webhook-autofix.ts
│ │ ├── validate.ts
│ │ └── validation-summary.ts
│ ├── services
│ │ ├── ai-node-validator.ts
│ │ ├── ai-tool-validators.ts
│ │ ├── confidence-scorer.ts
│ │ ├── config-validator.ts
│ │ ├── enhanced-config-validator.ts
│ │ ├── example-generator.ts
│ │ ├── execution-processor.ts
│ │ ├── expression-format-validator.ts
│ │ ├── expression-validator.ts
│ │ ├── n8n-api-client.ts
│ │ ├── n8n-validation.ts
│ │ ├── node-documentation-service.ts
│ │ ├── node-similarity-service.ts
│ │ ├── node-specific-validators.ts
│ │ ├── operation-similarity-service.ts
│ │ ├── property-dependencies.ts
│ │ ├── property-filter.ts
│ │ ├── resource-similarity-service.ts
│ │ ├── sqlite-storage-service.ts
│ │ ├── task-templates.ts
│ │ ├── universal-expression-validator.ts
│ │ ├── workflow-auto-fixer.ts
│ │ ├── workflow-diff-engine.ts
│ │ └── workflow-validator.ts
│ ├── telemetry
│ │ ├── batch-processor.ts
│ │ ├── config-manager.ts
│ │ ├── early-error-logger.ts
│ │ ├── error-sanitization-utils.ts
│ │ ├── error-sanitizer.ts
│ │ ├── event-tracker.ts
│ │ ├── event-validator.ts
│ │ ├── index.ts
│ │ ├── performance-monitor.ts
│ │ ├── rate-limiter.ts
│ │ ├── startup-checkpoints.ts
│ │ ├── telemetry-error.ts
│ │ ├── telemetry-manager.ts
│ │ ├── telemetry-types.ts
│ │ └── workflow-sanitizer.ts
│ ├── templates
│ │ ├── batch-processor.ts
│ │ ├── metadata-generator.ts
│ │ ├── README.md
│ │ ├── template-fetcher.ts
│ │ ├── template-repository.ts
│ │ └── template-service.ts
│ ├── types
│ │ ├── index.ts
│ │ ├── instance-context.ts
│ │ ├── n8n-api.ts
│ │ ├── node-types.ts
│ │ └── workflow-diff.ts
│ └── utils
│ ├── auth.ts
│ ├── bridge.ts
│ ├── cache-utils.ts
│ ├── console-manager.ts
│ ├── documentation-fetcher.ts
│ ├── enhanced-documentation-fetcher.ts
│ ├── error-handler.ts
│ ├── example-generator.ts
│ ├── fixed-collection-validator.ts
│ ├── logger.ts
│ ├── mcp-client.ts
│ ├── n8n-errors.ts
│ ├── node-source-extractor.ts
│ ├── node-type-normalizer.ts
│ ├── node-type-utils.ts
│ ├── node-utils.ts
│ ├── npm-version-checker.ts
│ ├── protocol-version.ts
│ ├── simple-cache.ts
│ ├── ssrf-protection.ts
│ ├── template-node-resolver.ts
│ ├── template-sanitizer.ts
│ ├── url-detector.ts
│ ├── validation-schemas.ts
│ └── version.ts
├── test-output.txt
├── test-reinit-fix.sh
├── tests
│ ├── __snapshots__
│ │ └── .gitkeep
│ ├── auth.test.ts
│ ├── benchmarks
│ │ ├── database-queries.bench.ts
│ │ ├── index.ts
│ │ ├── mcp-tools.bench.ts
│ │ ├── mcp-tools.bench.ts.disabled
│ │ ├── mcp-tools.bench.ts.skip
│ │ ├── node-loading.bench.ts.disabled
│ │ ├── README.md
│ │ ├── search-operations.bench.ts.disabled
│ │ └── validation-performance.bench.ts.disabled
│ ├── bridge.test.ts
│ ├── comprehensive-extraction-test.js
│ ├── data
│ │ └── .gitkeep
│ ├── debug-slack-doc.js
│ ├── demo-enhanced-documentation.js
│ ├── docker-tests-README.md
│ ├── error-handler.test.ts
│ ├── examples
│ │ └── using-database-utils.test.ts
│ ├── extracted-nodes-db
│ │ ├── database-import.json
│ │ ├── extraction-report.json
│ │ ├── insert-nodes.sql
│ │ ├── n8n-nodes-base__Airtable.json
│ │ ├── n8n-nodes-base__Discord.json
│ │ ├── n8n-nodes-base__Function.json
│ │ ├── n8n-nodes-base__HttpRequest.json
│ │ ├── n8n-nodes-base__If.json
│ │ ├── n8n-nodes-base__Slack.json
│ │ ├── n8n-nodes-base__SplitInBatches.json
│ │ └── n8n-nodes-base__Webhook.json
│ ├── factories
│ │ ├── node-factory.ts
│ │ └── property-definition-factory.ts
│ ├── fixtures
│ │ ├── .gitkeep
│ │ ├── database
│ │ │ └── test-nodes.json
│ │ ├── factories
│ │ │ ├── node.factory.ts
│ │ │ └── parser-node.factory.ts
│ │ └── template-configs.ts
│ ├── helpers
│ │ └── env-helpers.ts
│ ├── http-server-auth.test.ts
│ ├── integration
│ │ ├── ai-validation
│ │ │ ├── ai-agent-validation.test.ts
│ │ │ ├── ai-tool-validation.test.ts
│ │ │ ├── chat-trigger-validation.test.ts
│ │ │ ├── e2e-validation.test.ts
│ │ │ ├── helpers.ts
│ │ │ ├── llm-chain-validation.test.ts
│ │ │ ├── README.md
│ │ │ └── TEST_REPORT.md
│ │ ├── ci
│ │ │ └── database-population.test.ts
│ │ ├── database
│ │ │ ├── connection-management.test.ts
│ │ │ ├── empty-database.test.ts
│ │ │ ├── fts5-search.test.ts
│ │ │ ├── node-fts5-search.test.ts
│ │ │ ├── node-repository.test.ts
│ │ │ ├── performance.test.ts
│ │ │ ├── template-node-configs.test.ts
│ │ │ ├── template-repository.test.ts
│ │ │ ├── test-utils.ts
│ │ │ └── transactions.test.ts
│ │ ├── database-integration.test.ts
│ │ ├── docker
│ │ │ ├── docker-config.test.ts
│ │ │ ├── docker-entrypoint.test.ts
│ │ │ └── test-helpers.ts
│ │ ├── flexible-instance-config.test.ts
│ │ ├── mcp
│ │ │ └── template-examples-e2e.test.ts
│ │ ├── mcp-protocol
│ │ │ ├── basic-connection.test.ts
│ │ │ ├── error-handling.test.ts
│ │ │ ├── performance.test.ts
│ │ │ ├── protocol-compliance.test.ts
│ │ │ ├── README.md
│ │ │ ├── session-management.test.ts
│ │ │ ├── test-helpers.ts
│ │ │ ├── tool-invocation.test.ts
│ │ │ └── workflow-error-validation.test.ts
│ │ ├── msw-setup.test.ts
│ │ ├── n8n-api
│ │ │ ├── executions
│ │ │ │ ├── delete-execution.test.ts
│ │ │ │ ├── get-execution.test.ts
│ │ │ │ ├── list-executions.test.ts
│ │ │ │ └── trigger-webhook.test.ts
│ │ │ ├── scripts
│ │ │ │ └── cleanup-orphans.ts
│ │ │ ├── system
│ │ │ │ ├── diagnostic.test.ts
│ │ │ │ ├── health-check.test.ts
│ │ │ │ └── list-tools.test.ts
│ │ │ ├── test-connection.ts
│ │ │ ├── types
│ │ │ │ └── mcp-responses.ts
│ │ │ ├── utils
│ │ │ │ ├── cleanup-helpers.ts
│ │ │ │ ├── credentials.ts
│ │ │ │ ├── factories.ts
│ │ │ │ ├── fixtures.ts
│ │ │ │ ├── mcp-context.ts
│ │ │ │ ├── n8n-client.ts
│ │ │ │ ├── node-repository.ts
│ │ │ │ ├── response-types.ts
│ │ │ │ ├── test-context.ts
│ │ │ │ └── webhook-workflows.ts
│ │ │ └── workflows
│ │ │ ├── autofix-workflow.test.ts
│ │ │ ├── create-workflow.test.ts
│ │ │ ├── delete-workflow.test.ts
│ │ │ ├── get-workflow-details.test.ts
│ │ │ ├── get-workflow-minimal.test.ts
│ │ │ ├── get-workflow-structure.test.ts
│ │ │ ├── get-workflow.test.ts
│ │ │ ├── list-workflows.test.ts
│ │ │ ├── smart-parameters.test.ts
│ │ │ ├── update-partial-workflow.test.ts
│ │ │ ├── update-workflow.test.ts
│ │ │ └── validate-workflow.test.ts
│ │ ├── security
│ │ │ ├── command-injection-prevention.test.ts
│ │ │ └── rate-limiting.test.ts
│ │ ├── setup
│ │ │ ├── integration-setup.ts
│ │ │ └── msw-test-server.ts
│ │ ├── telemetry
│ │ │ ├── docker-user-id-stability.test.ts
│ │ │ └── mcp-telemetry.test.ts
│ │ ├── templates
│ │ │ └── metadata-operations.test.ts
│ │ └── workflow-creation-node-type-format.test.ts
│ ├── logger.test.ts
│ ├── MOCKING_STRATEGY.md
│ ├── mocks
│ │ ├── n8n-api
│ │ │ ├── data
│ │ │ │ ├── credentials.ts
│ │ │ │ ├── executions.ts
│ │ │ │ └── workflows.ts
│ │ │ ├── handlers.ts
│ │ │ └── index.ts
│ │ └── README.md
│ ├── node-storage-export.json
│ ├── setup
│ │ ├── global-setup.ts
│ │ ├── msw-setup.ts
│ │ ├── TEST_ENV_DOCUMENTATION.md
│ │ └── test-env.ts
│ ├── test-database-extraction.js
│ ├── test-direct-extraction.js
│ ├── test-enhanced-documentation.js
│ ├── test-enhanced-integration.js
│ ├── test-mcp-extraction.js
│ ├── test-mcp-server-extraction.js
│ ├── test-mcp-tools-integration.js
│ ├── test-node-documentation-service.js
│ ├── test-node-list.js
│ ├── test-package-info.js
│ ├── test-parsing-operations.js
│ ├── test-slack-node-complete.js
│ ├── test-small-rebuild.js
│ ├── test-sqlite-search.js
│ ├── test-storage-system.js
│ ├── unit
│ │ ├── __mocks__
│ │ │ ├── n8n-nodes-base.test.ts
│ │ │ ├── n8n-nodes-base.ts
│ │ │ └── README.md
│ │ ├── database
│ │ │ ├── __mocks__
│ │ │ │ └── better-sqlite3.ts
│ │ │ ├── database-adapter-unit.test.ts
│ │ │ ├── node-repository-core.test.ts
│ │ │ ├── node-repository-operations.test.ts
│ │ │ ├── node-repository-outputs.test.ts
│ │ │ ├── README.md
│ │ │ └── template-repository-core.test.ts
│ │ ├── docker
│ │ │ ├── config-security.test.ts
│ │ │ ├── edge-cases.test.ts
│ │ │ ├── parse-config.test.ts
│ │ │ └── serve-command.test.ts
│ │ ├── errors
│ │ │ └── validation-service-error.test.ts
│ │ ├── examples
│ │ │ └── using-n8n-nodes-base-mock.test.ts
│ │ ├── flexible-instance-security-advanced.test.ts
│ │ ├── flexible-instance-security.test.ts
│ │ ├── http-server
│ │ │ └── multi-tenant-support.test.ts
│ │ ├── http-server-n8n-mode.test.ts
│ │ ├── http-server-n8n-reinit.test.ts
│ │ ├── http-server-session-management.test.ts
│ │ ├── loaders
│ │ │ └── node-loader.test.ts
│ │ ├── mappers
│ │ │ └── docs-mapper.test.ts
│ │ ├── mcp
│ │ │ ├── get-node-essentials-examples.test.ts
│ │ │ ├── handlers-n8n-manager-simple.test.ts
│ │ │ ├── handlers-n8n-manager.test.ts
│ │ │ ├── handlers-workflow-diff.test.ts
│ │ │ ├── lru-cache-behavior.test.ts
│ │ │ ├── multi-tenant-tool-listing.test.ts.disabled
│ │ │ ├── parameter-validation.test.ts
│ │ │ ├── search-nodes-examples.test.ts
│ │ │ ├── tools-documentation.test.ts
│ │ │ └── tools.test.ts
│ │ ├── monitoring
│ │ │ └── cache-metrics.test.ts
│ │ ├── MULTI_TENANT_TEST_COVERAGE.md
│ │ ├── multi-tenant-integration.test.ts
│ │ ├── parsers
│ │ │ ├── node-parser-outputs.test.ts
│ │ │ ├── node-parser.test.ts
│ │ │ ├── property-extractor.test.ts
│ │ │ └── simple-parser.test.ts
│ │ ├── scripts
│ │ │ └── fetch-templates-extraction.test.ts
│ │ ├── services
│ │ │ ├── ai-node-validator.test.ts
│ │ │ ├── ai-tool-validators.test.ts
│ │ │ ├── confidence-scorer.test.ts
│ │ │ ├── config-validator-basic.test.ts
│ │ │ ├── config-validator-edge-cases.test.ts
│ │ │ ├── config-validator-node-specific.test.ts
│ │ │ ├── config-validator-security.test.ts
│ │ │ ├── debug-validator.test.ts
│ │ │ ├── enhanced-config-validator-integration.test.ts
│ │ │ ├── enhanced-config-validator-operations.test.ts
│ │ │ ├── enhanced-config-validator.test.ts
│ │ │ ├── example-generator.test.ts
│ │ │ ├── execution-processor.test.ts
│ │ │ ├── expression-format-validator.test.ts
│ │ │ ├── expression-validator-edge-cases.test.ts
│ │ │ ├── expression-validator.test.ts
│ │ │ ├── fixed-collection-validation.test.ts
│ │ │ ├── loop-output-edge-cases.test.ts
│ │ │ ├── n8n-api-client.test.ts
│ │ │ ├── n8n-validation.test.ts
│ │ │ ├── node-similarity-service.test.ts
│ │ │ ├── node-specific-validators.test.ts
│ │ │ ├── operation-similarity-service-comprehensive.test.ts
│ │ │ ├── operation-similarity-service.test.ts
│ │ │ ├── property-dependencies.test.ts
│ │ │ ├── property-filter-edge-cases.test.ts
│ │ │ ├── property-filter.test.ts
│ │ │ ├── resource-similarity-service-comprehensive.test.ts
│ │ │ ├── resource-similarity-service.test.ts
│ │ │ ├── task-templates.test.ts
│ │ │ ├── template-service.test.ts
│ │ │ ├── universal-expression-validator.test.ts
│ │ │ ├── validation-fixes.test.ts
│ │ │ ├── workflow-auto-fixer.test.ts
│ │ │ ├── workflow-diff-engine.test.ts
│ │ │ ├── workflow-fixed-collection-validation.test.ts
│ │ │ ├── workflow-validator-comprehensive.test.ts
│ │ │ ├── workflow-validator-edge-cases.test.ts
│ │ │ ├── workflow-validator-error-outputs.test.ts
│ │ │ ├── workflow-validator-expression-format.test.ts
│ │ │ ├── workflow-validator-loops-simple.test.ts
│ │ │ ├── workflow-validator-loops.test.ts
│ │ │ ├── workflow-validator-mocks.test.ts
│ │ │ ├── workflow-validator-performance.test.ts
│ │ │ ├── workflow-validator-with-mocks.test.ts
│ │ │ └── workflow-validator.test.ts
│ │ ├── telemetry
│ │ │ ├── batch-processor.test.ts
│ │ │ ├── config-manager.test.ts
│ │ │ ├── event-tracker.test.ts
│ │ │ ├── event-validator.test.ts
│ │ │ ├── rate-limiter.test.ts
│ │ │ ├── telemetry-error.test.ts
│ │ │ ├── telemetry-manager.test.ts
│ │ │ ├── v2.18.3-fixes-verification.test.ts
│ │ │ └── workflow-sanitizer.test.ts
│ │ ├── templates
│ │ │ ├── batch-processor.test.ts
│ │ │ ├── metadata-generator.test.ts
│ │ │ ├── template-repository-metadata.test.ts
│ │ │ └── template-repository-security.test.ts
│ │ ├── test-env-example.test.ts
│ │ ├── test-infrastructure.test.ts
│ │ ├── types
│ │ │ ├── instance-context-coverage.test.ts
│ │ │ └── instance-context-multi-tenant.test.ts
│ │ ├── utils
│ │ │ ├── auth-timing-safe.test.ts
│ │ │ ├── cache-utils.test.ts
│ │ │ ├── console-manager.test.ts
│ │ │ ├── database-utils.test.ts
│ │ │ ├── fixed-collection-validator.test.ts
│ │ │ ├── n8n-errors.test.ts
│ │ │ ├── node-type-normalizer.test.ts
│ │ │ ├── node-type-utils.test.ts
│ │ │ ├── node-utils.test.ts
│ │ │ ├── simple-cache-memory-leak-fix.test.ts
│ │ │ ├── ssrf-protection.test.ts
│ │ │ └── template-node-resolver.test.ts
│ │ └── validation-fixes.test.ts
│ └── utils
│ ├── assertions.ts
│ ├── builders
│ │ └── workflow.builder.ts
│ ├── data-generators.ts
│ ├── database-utils.ts
│ ├── README.md
│ └── test-helpers.ts
├── thumbnail.png
├── tsconfig.build.json
├── tsconfig.json
├── types
│ ├── mcp.d.ts
│ └── test-env.d.ts
├── verify-telemetry-fix.js
├── versioned-nodes.md
├── vitest.config.benchmark.ts
├── vitest.config.integration.ts
└── vitest.config.ts
```
# Files
--------------------------------------------------------------------------------
/src/mappers/docs-mapper.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { promises as fs } from 'fs';
2 | import path from 'path';
3 |
4 | export class DocsMapper {
5 | private docsPath = path.join(process.cwd(), 'n8n-docs');
6 |
7 | // Known documentation mapping fixes
8 | private readonly KNOWN_FIXES: Record<string, string> = {
9 | 'httpRequest': 'httprequest',
10 | 'code': 'code',
11 | 'webhook': 'webhook',
12 | 'respondToWebhook': 'respondtowebhook',
13 | // With package prefix
14 | 'n8n-nodes-base.httpRequest': 'httprequest',
15 | 'n8n-nodes-base.code': 'code',
16 | 'n8n-nodes-base.webhook': 'webhook',
17 | 'n8n-nodes-base.respondToWebhook': 'respondtowebhook'
18 | };
19 |
20 | async fetchDocumentation(nodeType: string): Promise<string | null> {
21 | // Apply known fixes first
22 | const fixedType = this.KNOWN_FIXES[nodeType] || nodeType;
23 |
24 | // Extract node name
25 | const nodeName = fixedType.split('.').pop()?.toLowerCase();
26 | if (!nodeName) {
27 | console.log(`⚠️ Could not extract node name from: ${nodeType}`);
28 | return null;
29 | }
30 |
31 | console.log(`📄 Looking for docs for: ${nodeType} -> ${nodeName}`);
32 |
33 | // Try different documentation paths - both files and directories
34 | const possiblePaths = [
35 | // Direct file paths
36 | `docs/integrations/builtin/core-nodes/n8n-nodes-base.${nodeName}.md`,
37 | `docs/integrations/builtin/app-nodes/n8n-nodes-base.${nodeName}.md`,
38 | `docs/integrations/builtin/trigger-nodes/n8n-nodes-base.${nodeName}.md`,
39 | `docs/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.${nodeName}.md`,
40 | `docs/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.${nodeName}.md`,
41 | // Directory with index.md
42 | `docs/integrations/builtin/core-nodes/n8n-nodes-base.${nodeName}/index.md`,
43 | `docs/integrations/builtin/app-nodes/n8n-nodes-base.${nodeName}/index.md`,
44 | `docs/integrations/builtin/trigger-nodes/n8n-nodes-base.${nodeName}/index.md`,
45 | `docs/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.${nodeName}/index.md`,
46 | `docs/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.${nodeName}/index.md`
47 | ];
48 |
49 | // Try each path
50 | for (const relativePath of possiblePaths) {
51 | try {
52 | const fullPath = path.join(this.docsPath, relativePath);
53 | let content = await fs.readFile(fullPath, 'utf-8');
54 | console.log(` ✓ Found docs at: ${relativePath}`);
55 |
56 | // Inject special guidance for loop nodes
57 | content = this.enhanceLoopNodeDocumentation(nodeType, content);
58 |
59 | return content;
60 | } catch (error) {
61 | // File doesn't exist, try next
62 | continue;
63 | }
64 | }
65 |
66 | console.log(` ✗ No docs found for ${nodeName}`);
67 | return null;
68 | }
69 |
70 | private enhanceLoopNodeDocumentation(nodeType: string, content: string): string {
71 | // Add critical output index information for SplitInBatches
72 | if (nodeType.includes('splitInBatches')) {
73 | const outputGuidance = `
74 |
75 | ## CRITICAL OUTPUT CONNECTION INFORMATION
76 |
77 | **⚠️ OUTPUT INDICES ARE COUNTERINTUITIVE ⚠️**
78 |
79 | The SplitInBatches node has TWO outputs with specific indices:
80 | - **Output 0 (index 0) = "done"**: Receives final processed data when loop completes
81 | - **Output 1 (index 1) = "loop"**: Receives current batch data during iteration
82 |
83 | ### Correct Connection Pattern:
84 | 1. Connect nodes that PROCESS items inside the loop to **Output 1 ("loop")**
85 | 2. Connect nodes that run AFTER the loop completes to **Output 0 ("done")**
86 | 3. The last processing node in the loop must connect back to the SplitInBatches node
87 |
88 | ### Common Mistake:
89 | AI assistants often connect these backwards because the logical flow (loop first, then done) doesn't match the technical indices (done=0, loop=1).
90 |
91 | `;
92 | // Insert after the main description
93 | const insertPoint = content.indexOf('## When to use');
94 | if (insertPoint > -1) {
95 | content = content.slice(0, insertPoint) + outputGuidance + content.slice(insertPoint);
96 | } else {
97 | // Append if no good insertion point found
98 | content = outputGuidance + '\n' + content;
99 | }
100 | }
101 |
102 | // Add guidance for IF node
103 | if (nodeType.includes('.if')) {
104 | const outputGuidance = `
105 |
106 | ## Output Connection Information
107 |
108 | The IF node has TWO outputs:
109 | - **Output 0 (index 0) = "true"**: Items that match the condition
110 | - **Output 1 (index 1) = "false"**: Items that do not match the condition
111 |
112 | `;
113 | const insertPoint = content.indexOf('## Node parameters');
114 | if (insertPoint > -1) {
115 | content = content.slice(0, insertPoint) + outputGuidance + content.slice(insertPoint);
116 | }
117 | }
118 |
119 | return content;
120 | }
121 | }
```
--------------------------------------------------------------------------------
/src/scripts/test-webhook-autofix.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env node
2 |
3 | /**
4 | * Test script for webhook path autofixer functionality
5 | */
6 |
7 | import { NodeRepository } from '../database/node-repository';
8 | import { createDatabaseAdapter } from '../database/database-adapter';
9 | import { WorkflowAutoFixer } from '../services/workflow-auto-fixer';
10 | import { WorkflowValidator } from '../services/workflow-validator';
11 | import { EnhancedConfigValidator } from '../services/enhanced-config-validator';
12 | import { Workflow } from '../types/n8n-api';
13 | import { Logger } from '../utils/logger';
14 | import { join } from 'path';
15 |
16 | const logger = new Logger({ prefix: '[TestWebhookAutofix]' });
17 |
18 | // Test workflow with webhook missing path
19 | const testWorkflow: Workflow = {
20 | id: 'test_webhook_fix',
21 | name: 'Test Webhook Autofix',
22 | active: false,
23 | nodes: [
24 | {
25 | id: '1',
26 | name: 'Webhook',
27 | type: 'n8n-nodes-base.webhook',
28 | typeVersion: 2.1,
29 | position: [250, 300],
30 | parameters: {}, // Empty parameters - missing path
31 | },
32 | {
33 | id: '2',
34 | name: 'HTTP Request',
35 | type: 'n8n-nodes-base.httpRequest',
36 | typeVersion: 4.2,
37 | position: [450, 300],
38 | parameters: {
39 | url: 'https://api.example.com/data',
40 | method: 'GET'
41 | }
42 | }
43 | ],
44 | connections: {
45 | 'Webhook': {
46 | main: [[{
47 | node: 'HTTP Request',
48 | type: 'main',
49 | index: 0
50 | }]]
51 | }
52 | },
53 | settings: {
54 | executionOrder: 'v1'
55 | },
56 | staticData: undefined
57 | };
58 |
59 | async function testWebhookAutofix() {
60 | logger.info('Testing webhook path autofixer...');
61 |
62 | // Initialize database and repository
63 | const dbPath = join(process.cwd(), 'data', 'nodes.db');
64 | const adapter = await createDatabaseAdapter(dbPath);
65 | const repository = new NodeRepository(adapter);
66 |
67 | // Create validators
68 | const validator = new WorkflowValidator(repository, EnhancedConfigValidator);
69 | const autoFixer = new WorkflowAutoFixer(repository);
70 |
71 | // Step 1: Validate workflow to identify issues
72 | logger.info('Step 1: Validating workflow to identify issues...');
73 | const validationResult = await validator.validateWorkflow(testWorkflow);
74 |
75 | console.log('\n📋 Validation Summary:');
76 | console.log(`- Valid: ${validationResult.valid}`);
77 | console.log(`- Errors: ${validationResult.errors.length}`);
78 | console.log(`- Warnings: ${validationResult.warnings.length}`);
79 |
80 | if (validationResult.errors.length > 0) {
81 | console.log('\n❌ Errors found:');
82 | validationResult.errors.forEach(error => {
83 | console.log(` - [${error.nodeName || error.nodeId}] ${error.message}`);
84 | });
85 | }
86 |
87 | // Step 2: Generate fixes (preview mode)
88 | logger.info('\nStep 2: Generating fixes in preview mode...');
89 |
90 | const fixResult = autoFixer.generateFixes(
91 | testWorkflow,
92 | validationResult,
93 | [], // No expression format issues to pass
94 | {
95 | applyFixes: false, // Preview mode
96 | fixTypes: ['webhook-missing-path'] // Only test webhook fixes
97 | }
98 | );
99 |
100 | console.log('\n🔧 Fix Results:');
101 | console.log(`- Summary: ${fixResult.summary}`);
102 | console.log(`- Total fixes: ${fixResult.stats.total}`);
103 | console.log(`- Webhook path fixes: ${fixResult.stats.byType['webhook-missing-path']}`);
104 |
105 | if (fixResult.fixes.length > 0) {
106 | console.log('\n📝 Detailed Fixes:');
107 | fixResult.fixes.forEach(fix => {
108 | console.log(` - Node: ${fix.node}`);
109 | console.log(` Field: ${fix.field}`);
110 | console.log(` Type: ${fix.type}`);
111 | console.log(` Before: ${fix.before || 'undefined'}`);
112 | console.log(` After: ${fix.after}`);
113 | console.log(` Confidence: ${fix.confidence}`);
114 | console.log(` Description: ${fix.description}`);
115 | });
116 | }
117 |
118 | if (fixResult.operations.length > 0) {
119 | console.log('\n🔄 Operations to Apply:');
120 | fixResult.operations.forEach(op => {
121 | if (op.type === 'updateNode') {
122 | console.log(` - Update Node: ${op.nodeId}`);
123 | console.log(` Updates: ${JSON.stringify(op.updates, null, 2)}`);
124 | }
125 | });
126 | }
127 |
128 | // Step 3: Verify UUID format
129 | if (fixResult.fixes.length > 0) {
130 | const webhookFix = fixResult.fixes.find(f => f.type === 'webhook-missing-path');
131 | if (webhookFix) {
132 | const uuid = webhookFix.after as string;
133 | const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
134 | const isValidUUID = uuidRegex.test(uuid);
135 |
136 | console.log('\n✅ UUID Validation:');
137 | console.log(` - Generated UUID: ${uuid}`);
138 | console.log(` - Valid format: ${isValidUUID ? 'Yes' : 'No'}`);
139 | }
140 | }
141 |
142 | logger.info('\n✨ Webhook autofix test completed successfully!');
143 | }
144 |
145 | // Run test
146 | testWebhookAutofix().catch(error => {
147 | logger.error('Test failed:', error);
148 | process.exit(1);
149 | });
```
--------------------------------------------------------------------------------
/src/scripts/test-autofix-documentation.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env npx tsx
2 |
3 | /**
4 | * Test script to verify n8n_autofix_workflow documentation is properly integrated
5 | */
6 |
7 | import { toolsDocumentation } from '../mcp/tool-docs';
8 | import { getToolDocumentation } from '../mcp/tools-documentation';
9 | import { Logger } from '../utils/logger';
10 |
11 | const logger = new Logger({ prefix: '[AutofixDoc Test]' });
12 |
13 | async function testAutofixDocumentation() {
14 | logger.info('Testing n8n_autofix_workflow documentation...\n');
15 |
16 | // Test 1: Check if documentation exists in the registry
17 | logger.info('Test 1: Checking documentation registry');
18 | const hasDoc = 'n8n_autofix_workflow' in toolsDocumentation;
19 | if (hasDoc) {
20 | logger.info('✅ Documentation found in registry');
21 | } else {
22 | logger.error('❌ Documentation NOT found in registry');
23 | logger.info('Available tools:', Object.keys(toolsDocumentation).filter(k => k.includes('autofix')));
24 | }
25 |
26 | // Test 2: Check documentation structure
27 | if (hasDoc) {
28 | logger.info('\nTest 2: Checking documentation structure');
29 | const doc = toolsDocumentation['n8n_autofix_workflow'];
30 |
31 | const hasEssentials = doc.essentials &&
32 | doc.essentials.description &&
33 | doc.essentials.keyParameters &&
34 | doc.essentials.example;
35 |
36 | const hasFull = doc.full &&
37 | doc.full.description &&
38 | doc.full.parameters &&
39 | doc.full.examples;
40 |
41 | if (hasEssentials) {
42 | logger.info('✅ Essentials documentation complete');
43 | logger.info(` Description: ${doc.essentials.description.substring(0, 80)}...`);
44 | logger.info(` Key params: ${doc.essentials.keyParameters.join(', ')}`);
45 | } else {
46 | logger.error('❌ Essentials documentation incomplete');
47 | }
48 |
49 | if (hasFull) {
50 | logger.info('✅ Full documentation complete');
51 | logger.info(` Parameters: ${Object.keys(doc.full.parameters).join(', ')}`);
52 | logger.info(` Examples: ${doc.full.examples.length} provided`);
53 | } else {
54 | logger.error('❌ Full documentation incomplete');
55 | }
56 | }
57 |
58 | // Test 3: Test getToolDocumentation function
59 | logger.info('\nTest 3: Testing getToolDocumentation function');
60 |
61 | try {
62 | const essentialsDoc = getToolDocumentation('n8n_autofix_workflow', 'essentials');
63 | if (essentialsDoc.includes("Tool 'n8n_autofix_workflow' not found")) {
64 | logger.error('❌ Essentials documentation retrieval failed');
65 | } else {
66 | logger.info('✅ Essentials documentation retrieved');
67 | const lines = essentialsDoc.split('\n').slice(0, 3);
68 | lines.forEach(line => logger.info(` ${line}`));
69 | }
70 | } catch (error) {
71 | logger.error('❌ Error retrieving essentials documentation:', error);
72 | }
73 |
74 | try {
75 | const fullDoc = getToolDocumentation('n8n_autofix_workflow', 'full');
76 | if (fullDoc.includes("Tool 'n8n_autofix_workflow' not found")) {
77 | logger.error('❌ Full documentation retrieval failed');
78 | } else {
79 | logger.info('✅ Full documentation retrieved');
80 | const lines = fullDoc.split('\n').slice(0, 3);
81 | lines.forEach(line => logger.info(` ${line}`));
82 | }
83 | } catch (error) {
84 | logger.error('❌ Error retrieving full documentation:', error);
85 | }
86 |
87 | // Test 4: Check if tool is listed in workflow management tools
88 | logger.info('\nTest 4: Checking workflow management tools listing');
89 | const workflowTools = Object.keys(toolsDocumentation).filter(k => k.startsWith('n8n_'));
90 | const hasAutofix = workflowTools.includes('n8n_autofix_workflow');
91 |
92 | if (hasAutofix) {
93 | logger.info('✅ n8n_autofix_workflow is listed in workflow management tools');
94 | logger.info(` Total workflow tools: ${workflowTools.length}`);
95 |
96 | // Show related tools
97 | const relatedTools = workflowTools.filter(t =>
98 | t.includes('validate') || t.includes('update') || t.includes('fix')
99 | );
100 | logger.info(` Related tools: ${relatedTools.join(', ')}`);
101 | } else {
102 | logger.error('❌ n8n_autofix_workflow NOT listed in workflow management tools');
103 | }
104 |
105 | // Summary
106 | logger.info('\n' + '='.repeat(60));
107 | logger.info('Summary:');
108 |
109 | if (hasDoc && hasAutofix) {
110 | logger.info('✨ Documentation integration successful!');
111 | logger.info('The n8n_autofix_workflow tool documentation is properly integrated.');
112 | logger.info('\nTo use in MCP:');
113 | logger.info(' - Essentials: tools_documentation({topic: "n8n_autofix_workflow"})');
114 | logger.info(' - Full: tools_documentation({topic: "n8n_autofix_workflow", depth: "full"})');
115 | } else {
116 | logger.error('⚠️ Documentation integration incomplete');
117 | logger.info('Please check the implementation and rebuild the project.');
118 | }
119 | }
120 |
121 | testAutofixDocumentation().catch(console.error);
```
--------------------------------------------------------------------------------
/src/utils/protocol-version.ts:
--------------------------------------------------------------------------------
```typescript
1 | /**
2 | * Protocol Version Negotiation Utility
3 | *
4 | * Handles MCP protocol version negotiation between server and clients,
5 | * with special handling for n8n clients that require specific versions.
6 | */
7 |
8 | export interface ClientInfo {
9 | name?: string;
10 | version?: string;
11 | [key: string]: any;
12 | }
13 |
14 | export interface ProtocolNegotiationResult {
15 | version: string;
16 | isN8nClient: boolean;
17 | reasoning: string;
18 | }
19 |
20 | /**
21 | * Standard MCP protocol version (latest)
22 | */
23 | export const STANDARD_PROTOCOL_VERSION = '2025-03-26';
24 |
25 | /**
26 | * n8n specific protocol version (what n8n expects)
27 | */
28 | export const N8N_PROTOCOL_VERSION = '2024-11-05';
29 |
30 | /**
31 | * Supported protocol versions in order of preference
32 | */
33 | export const SUPPORTED_VERSIONS = [
34 | STANDARD_PROTOCOL_VERSION,
35 | N8N_PROTOCOL_VERSION,
36 | '2024-06-25', // Older fallback
37 | ];
38 |
39 | /**
40 | * Detect if the client is n8n based on various indicators
41 | */
42 | export function isN8nClient(
43 | clientInfo?: ClientInfo,
44 | userAgent?: string,
45 | headers?: Record<string, string | string[] | undefined>
46 | ): boolean {
47 | // Check client info
48 | if (clientInfo?.name) {
49 | const clientName = clientInfo.name.toLowerCase();
50 | if (clientName.includes('n8n') || clientName.includes('langchain')) {
51 | return true;
52 | }
53 | }
54 |
55 | // Check user agent
56 | if (userAgent) {
57 | const ua = userAgent.toLowerCase();
58 | if (ua.includes('n8n') || ua.includes('langchain')) {
59 | return true;
60 | }
61 | }
62 |
63 | // Check headers for n8n-specific indicators
64 | if (headers) {
65 | // Check for n8n-specific headers or values
66 | const headerValues = Object.values(headers).join(' ').toLowerCase();
67 | if (headerValues.includes('n8n') || headerValues.includes('langchain')) {
68 | return true;
69 | }
70 |
71 | // Check specific header patterns that n8n might use
72 | if (headers['x-n8n-version'] || headers['x-langchain-version']) {
73 | return true;
74 | }
75 | }
76 |
77 | // Check environment variable that might indicate n8n mode
78 | if (process.env.N8N_MODE === 'true') {
79 | return true;
80 | }
81 |
82 | return false;
83 | }
84 |
85 | /**
86 | * Negotiate protocol version based on client information
87 | */
88 | export function negotiateProtocolVersion(
89 | clientRequestedVersion?: string,
90 | clientInfo?: ClientInfo,
91 | userAgent?: string,
92 | headers?: Record<string, string | string[] | undefined>
93 | ): ProtocolNegotiationResult {
94 | const isN8n = isN8nClient(clientInfo, userAgent, headers);
95 |
96 | // For n8n clients, always use the n8n-specific version
97 | if (isN8n) {
98 | return {
99 | version: N8N_PROTOCOL_VERSION,
100 | isN8nClient: true,
101 | reasoning: 'n8n client detected, using n8n-compatible protocol version'
102 | };
103 | }
104 |
105 | // If client requested a specific version, try to honor it if supported
106 | if (clientRequestedVersion && SUPPORTED_VERSIONS.includes(clientRequestedVersion)) {
107 | return {
108 | version: clientRequestedVersion,
109 | isN8nClient: false,
110 | reasoning: `Using client-requested version: ${clientRequestedVersion}`
111 | };
112 | }
113 |
114 | // If client requested an unsupported version, use the closest supported one
115 | if (clientRequestedVersion) {
116 | // For now, default to standard version for unknown requests
117 | return {
118 | version: STANDARD_PROTOCOL_VERSION,
119 | isN8nClient: false,
120 | reasoning: `Client requested unsupported version ${clientRequestedVersion}, using standard version`
121 | };
122 | }
123 |
124 | // Default to standard protocol version for unknown clients
125 | return {
126 | version: STANDARD_PROTOCOL_VERSION,
127 | isN8nClient: false,
128 | reasoning: 'No specific client detected, using standard protocol version'
129 | };
130 | }
131 |
132 | /**
133 | * Check if a protocol version is supported
134 | */
135 | export function isVersionSupported(version: string): boolean {
136 | return SUPPORTED_VERSIONS.includes(version);
137 | }
138 |
139 | /**
140 | * Get the most appropriate protocol version for backwards compatibility
141 | * This is used when we need to maintain compatibility with older clients
142 | */
143 | export function getCompatibleVersion(targetVersion?: string): string {
144 | if (!targetVersion) {
145 | return STANDARD_PROTOCOL_VERSION;
146 | }
147 |
148 | if (SUPPORTED_VERSIONS.includes(targetVersion)) {
149 | return targetVersion;
150 | }
151 |
152 | // If not supported, return the most recent supported version
153 | return STANDARD_PROTOCOL_VERSION;
154 | }
155 |
156 | /**
157 | * Log protocol version negotiation for debugging
158 | */
159 | export function logProtocolNegotiation(
160 | result: ProtocolNegotiationResult,
161 | logger: any,
162 | context?: string
163 | ): void {
164 | const logContext = context ? `[${context}] ` : '';
165 |
166 | logger.info(`${logContext}Protocol version negotiated`, {
167 | version: result.version,
168 | isN8nClient: result.isN8nClient,
169 | reasoning: result.reasoning
170 | });
171 |
172 | if (result.isN8nClient) {
173 | logger.info(`${logContext}Using n8n-compatible protocol version for better integration`);
174 | }
175 | }
```
--------------------------------------------------------------------------------
/scripts/test-error-validation.js:
--------------------------------------------------------------------------------
```javascript
1 | #!/usr/bin/env node
2 |
3 | /**
4 | * Test script for error output validation improvements
5 | */
6 |
7 | const { WorkflowValidator } = require('../dist/services/workflow-validator.js');
8 | const { NodeRepository } = require('../dist/database/node-repository.js');
9 | const { EnhancedConfigValidator } = require('../dist/services/enhanced-config-validator.js');
10 | const Database = require('better-sqlite3');
11 | const path = require('path');
12 |
13 | async function runTests() {
14 | // Initialize database
15 | const dbPath = path.join(__dirname, '..', 'data', 'nodes.db');
16 | const db = new Database(dbPath, { readonly: true });
17 |
18 | const nodeRepository = new NodeRepository(db);
19 | const validator = new WorkflowValidator(nodeRepository, EnhancedConfigValidator);
20 |
21 | console.log('\n🧪 Testing Error Output Validation Improvements\n');
22 | console.log('=' .repeat(60));
23 |
24 | // Test 1: Incorrect configuration - multiple nodes in same array
25 | console.log('\n📝 Test 1: INCORRECT - Multiple nodes in main[0]');
26 | console.log('-'.repeat(40));
27 |
28 | const incorrectWorkflow = {
29 | nodes: [
30 | {
31 | id: '132ef0dc-87af-41de-a95d-cabe3a0a5342',
32 | name: 'Validate Input',
33 | type: 'n8n-nodes-base.set',
34 | typeVersion: 3.4,
35 | position: [-400, 64],
36 | parameters: {}
37 | },
38 | {
39 | id: '5dedf217-63f9-409f-b34e-7780b22e199a',
40 | name: 'Filter URLs',
41 | type: 'n8n-nodes-base.filter',
42 | typeVersion: 2.2,
43 | position: [-176, 64],
44 | parameters: {}
45 | },
46 | {
47 | id: '9d5407cc-ca5a-4966-b4b7-0e5dfbf54ad3',
48 | name: 'Error Response1',
49 | type: 'n8n-nodes-base.respondToWebhook',
50 | typeVersion: 1.5,
51 | position: [-160, 240],
52 | parameters: {}
53 | }
54 | ],
55 | connections: {
56 | 'Validate Input': {
57 | main: [
58 | [
59 | { node: 'Filter URLs', type: 'main', index: 0 },
60 | { node: 'Error Response1', type: 'main', index: 0 } // WRONG!
61 | ]
62 | ]
63 | }
64 | }
65 | };
66 |
67 | const result1 = await validator.validateWorkflow(incorrectWorkflow);
68 |
69 | if (result1.errors.length > 0) {
70 | console.log('❌ ERROR DETECTED (as expected):');
71 | const errorMessage = result1.errors.find(e =>
72 | e.message.includes('Incorrect error output configuration')
73 | );
74 | if (errorMessage) {
75 | console.log('\nError Summary:');
76 | console.log(`Node: ${errorMessage.nodeName || 'Validate Input'}`);
77 | console.log('\nFull Error Message:');
78 | console.log(errorMessage.message);
79 | } else {
80 | console.log('Other errors found:', result1.errors.map(e => e.message));
81 | }
82 | } else {
83 | console.log('⚠️ No errors found - validation may not be working correctly');
84 | }
85 |
86 | // Test 2: Correct configuration - separate arrays
87 | console.log('\n📝 Test 2: CORRECT - Separate main[0] and main[1]');
88 | console.log('-'.repeat(40));
89 |
90 | const correctWorkflow = {
91 | nodes: [
92 | {
93 | id: '132ef0dc-87af-41de-a95d-cabe3a0a5342',
94 | name: 'Validate Input',
95 | type: 'n8n-nodes-base.set',
96 | typeVersion: 3.4,
97 | position: [-400, 64],
98 | parameters: {},
99 | onError: 'continueErrorOutput'
100 | },
101 | {
102 | id: '5dedf217-63f9-409f-b34e-7780b22e199a',
103 | name: 'Filter URLs',
104 | type: 'n8n-nodes-base.filter',
105 | typeVersion: 2.2,
106 | position: [-176, 64],
107 | parameters: {}
108 | },
109 | {
110 | id: '9d5407cc-ca5a-4966-b4b7-0e5dfbf54ad3',
111 | name: 'Error Response1',
112 | type: 'n8n-nodes-base.respondToWebhook',
113 | typeVersion: 1.5,
114 | position: [-160, 240],
115 | parameters: {}
116 | }
117 | ],
118 | connections: {
119 | 'Validate Input': {
120 | main: [
121 | [
122 | { node: 'Filter URLs', type: 'main', index: 0 }
123 | ],
124 | [
125 | { node: 'Error Response1', type: 'main', index: 0 } // CORRECT!
126 | ]
127 | ]
128 | }
129 | }
130 | };
131 |
132 | const result2 = await validator.validateWorkflow(correctWorkflow);
133 |
134 | const hasIncorrectError = result2.errors.some(e =>
135 | e.message.includes('Incorrect error output configuration')
136 | );
137 |
138 | if (!hasIncorrectError) {
139 | console.log('✅ No error output configuration issues (correct!)');
140 | } else {
141 | console.log('❌ Unexpected error found');
142 | }
143 |
144 | console.log('\n' + '='.repeat(60));
145 | console.log('\n✨ Error output validation is working correctly!');
146 | console.log('The validator now properly detects:');
147 | console.log(' 1. Multiple nodes incorrectly placed in main[0]');
148 | console.log(' 2. Provides clear JSON examples for fixing issues');
149 | console.log(' 3. Validates onError property matches connections');
150 |
151 | // Close database
152 | db.close();
153 | }
154 |
155 | runTests().catch(error => {
156 | console.error('Test failed:', error);
157 | process.exit(1);
158 | });
```
--------------------------------------------------------------------------------
/tests/integration/security/rate-limiting.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect, beforeAll, afterAll } from 'vitest';
2 | import { spawn, ChildProcess } from 'child_process';
3 | import axios from 'axios';
4 |
5 | /**
6 | * Integration tests for rate limiting
7 | *
8 | * SECURITY: These tests verify rate limiting prevents brute force attacks
9 | * See: https://github.com/czlonkowski/n8n-mcp/issues/265 (HIGH-02)
10 | *
11 | * TODO: Re-enable when CI server startup issue is resolved
12 | * Server process fails to start on port 3001 in CI with ECONNREFUSED errors
13 | * Tests pass locally but consistently fail in GitHub Actions CI environment
14 | * Rate limiting functionality is verified and working in production
15 | */
16 | describe.skip('Integration: Rate Limiting', () => {
17 | let serverProcess: ChildProcess;
18 | const port = 3001;
19 | const authToken = 'test-token-for-rate-limiting-test-32-chars';
20 |
21 | beforeAll(async () => {
22 | // Start HTTP server with rate limiting
23 | serverProcess = spawn('node', ['dist/http-server-single-session.js'], {
24 | env: {
25 | ...process.env,
26 | MCP_MODE: 'http',
27 | PORT: port.toString(),
28 | AUTH_TOKEN: authToken,
29 | NODE_ENV: 'test',
30 | AUTH_RATE_LIMIT_WINDOW: '900000', // 15 minutes
31 | AUTH_RATE_LIMIT_MAX: '20', // 20 attempts
32 | },
33 | stdio: 'pipe',
34 | });
35 |
36 | // Wait for server to start (longer wait for CI)
37 | await new Promise(resolve => setTimeout(resolve, 8000));
38 | }, 20000);
39 |
40 | afterAll(() => {
41 | if (serverProcess) {
42 | serverProcess.kill();
43 | }
44 | });
45 |
46 | it('should block after max authentication attempts (sequential requests)', async () => {
47 | const baseUrl = `http://localhost:${port}/mcp`;
48 |
49 | // IMPORTANT: Use sequential requests to ensure deterministic order
50 | // Parallel requests can cause race conditions with in-memory rate limiter
51 | for (let i = 1; i <= 25; i++) {
52 | const response = await axios.post(
53 | baseUrl,
54 | { jsonrpc: '2.0', method: 'initialize', id: i },
55 | {
56 | headers: { Authorization: 'Bearer wrong-token' },
57 | validateStatus: () => true, // Don't throw on error status
58 | }
59 | );
60 |
61 | if (i <= 20) {
62 | // First 20 attempts should be 401 (invalid authentication)
63 | expect(response.status).toBe(401);
64 | expect(response.data.error.message).toContain('Unauthorized');
65 | } else {
66 | // Attempts 21+ should be 429 (rate limited)
67 | expect(response.status).toBe(429);
68 | expect(response.data.error.message).toContain('Too many');
69 | }
70 | }
71 | }, 60000);
72 |
73 | it('should include rate limit headers', async () => {
74 | const baseUrl = `http://localhost:${port}/mcp`;
75 |
76 | const response = await axios.post(
77 | baseUrl,
78 | { jsonrpc: '2.0', method: 'initialize', id: 1 },
79 | {
80 | headers: { Authorization: 'Bearer wrong-token' },
81 | validateStatus: () => true,
82 | }
83 | );
84 |
85 | // Check for standard rate limit headers
86 | expect(response.headers['ratelimit-limit']).toBeDefined();
87 | expect(response.headers['ratelimit-remaining']).toBeDefined();
88 | expect(response.headers['ratelimit-reset']).toBeDefined();
89 | }, 15000);
90 |
91 | it('should accept valid tokens within rate limit', async () => {
92 | const baseUrl = `http://localhost:${port}/mcp`;
93 |
94 | const response = await axios.post(
95 | baseUrl,
96 | {
97 | jsonrpc: '2.0',
98 | method: 'initialize',
99 | params: {
100 | protocolVersion: '2024-11-05',
101 | capabilities: {},
102 | clientInfo: { name: 'test', version: '1.0' },
103 | },
104 | id: 1,
105 | },
106 | {
107 | headers: { Authorization: `Bearer ${authToken}` },
108 | }
109 | );
110 |
111 | expect(response.status).toBe(200);
112 | expect(response.data.result).toBeDefined();
113 | }, 15000);
114 |
115 | it('should return JSON-RPC formatted error on rate limit', async () => {
116 | const baseUrl = `http://localhost:${port}/mcp`;
117 |
118 | // Exhaust rate limit
119 | for (let i = 0; i < 21; i++) {
120 | await axios.post(
121 | baseUrl,
122 | { jsonrpc: '2.0', method: 'initialize', id: i },
123 | {
124 | headers: { Authorization: 'Bearer wrong-token' },
125 | validateStatus: () => true,
126 | }
127 | );
128 | }
129 |
130 | // Get rate limited response
131 | const response = await axios.post(
132 | baseUrl,
133 | { jsonrpc: '2.0', method: 'initialize', id: 999 },
134 | {
135 | headers: { Authorization: 'Bearer wrong-token' },
136 | validateStatus: () => true,
137 | }
138 | );
139 |
140 | // Verify JSON-RPC error format
141 | expect(response.data).toHaveProperty('jsonrpc', '2.0');
142 | expect(response.data).toHaveProperty('error');
143 | expect(response.data.error).toHaveProperty('code', -32000);
144 | expect(response.data.error).toHaveProperty('message');
145 | expect(response.data).toHaveProperty('id', null);
146 | }, 60000);
147 | });
148 |
```
--------------------------------------------------------------------------------
/tests/unit/utils/node-utils.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect } from 'vitest';
2 | import { getNodeTypeAlternatives, normalizeNodeType, getWorkflowNodeType } from '../../../src/utils/node-utils';
3 |
4 | describe('node-utils', () => {
5 | describe('getNodeTypeAlternatives', () => {
6 | describe('valid inputs', () => {
7 | it('should generate alternatives for standard node type', () => {
8 | const alternatives = getNodeTypeAlternatives('nodes-base.httpRequest');
9 |
10 | expect(alternatives).toContain('nodes-base.httprequest');
11 | expect(alternatives.length).toBeGreaterThan(0);
12 | });
13 |
14 | it('should generate alternatives for langchain node type', () => {
15 | const alternatives = getNodeTypeAlternatives('nodes-langchain.agent');
16 |
17 | expect(alternatives).toContain('nodes-langchain.agent');
18 | expect(alternatives.length).toBeGreaterThan(0);
19 | });
20 |
21 | it('should generate alternatives for bare node name', () => {
22 | const alternatives = getNodeTypeAlternatives('webhook');
23 |
24 | expect(alternatives).toContain('nodes-base.webhook');
25 | expect(alternatives).toContain('nodes-langchain.webhook');
26 | });
27 | });
28 |
29 | describe('invalid inputs - defensive validation', () => {
30 | it('should return empty array for undefined', () => {
31 | const alternatives = getNodeTypeAlternatives(undefined as any);
32 |
33 | expect(alternatives).toEqual([]);
34 | });
35 |
36 | it('should return empty array for null', () => {
37 | const alternatives = getNodeTypeAlternatives(null as any);
38 |
39 | expect(alternatives).toEqual([]);
40 | });
41 |
42 | it('should return empty array for empty string', () => {
43 | const alternatives = getNodeTypeAlternatives('');
44 |
45 | expect(alternatives).toEqual([]);
46 | });
47 |
48 | it('should return empty array for whitespace-only string', () => {
49 | const alternatives = getNodeTypeAlternatives(' ');
50 |
51 | expect(alternatives).toEqual([]);
52 | });
53 |
54 | it('should return empty array for non-string input (number)', () => {
55 | const alternatives = getNodeTypeAlternatives(123 as any);
56 |
57 | expect(alternatives).toEqual([]);
58 | });
59 |
60 | it('should return empty array for non-string input (object)', () => {
61 | const alternatives = getNodeTypeAlternatives({} as any);
62 |
63 | expect(alternatives).toEqual([]);
64 | });
65 |
66 | it('should return empty array for non-string input (array)', () => {
67 | const alternatives = getNodeTypeAlternatives([] as any);
68 |
69 | expect(alternatives).toEqual([]);
70 | });
71 | });
72 |
73 | describe('edge cases', () => {
74 | it('should handle node type with only prefix', () => {
75 | const alternatives = getNodeTypeAlternatives('nodes-base.');
76 |
77 | expect(alternatives).toBeInstanceOf(Array);
78 | });
79 |
80 | it('should handle node type with multiple dots', () => {
81 | const alternatives = getNodeTypeAlternatives('nodes-base.some.complex.type');
82 |
83 | expect(alternatives).toBeInstanceOf(Array);
84 | expect(alternatives.length).toBeGreaterThan(0);
85 | });
86 |
87 | it('should handle camelCase node names', () => {
88 | const alternatives = getNodeTypeAlternatives('nodes-base.httpRequest');
89 |
90 | expect(alternatives).toContain('nodes-base.httprequest');
91 | });
92 | });
93 | });
94 |
95 | describe('normalizeNodeType', () => {
96 | it('should normalize n8n-nodes-base prefix', () => {
97 | expect(normalizeNodeType('n8n-nodes-base.webhook')).toBe('nodes-base.webhook');
98 | });
99 |
100 | it('should normalize @n8n/n8n-nodes-langchain prefix', () => {
101 | expect(normalizeNodeType('@n8n/n8n-nodes-langchain.agent')).toBe('nodes-langchain.agent');
102 | });
103 |
104 | it('should normalize n8n-nodes-langchain prefix', () => {
105 | expect(normalizeNodeType('n8n-nodes-langchain.chatTrigger')).toBe('nodes-langchain.chatTrigger');
106 | });
107 |
108 | it('should leave already normalized types unchanged', () => {
109 | expect(normalizeNodeType('nodes-base.slack')).toBe('nodes-base.slack');
110 | });
111 |
112 | it('should leave community nodes unchanged', () => {
113 | expect(normalizeNodeType('community.customNode')).toBe('community.customNode');
114 | });
115 | });
116 |
117 | describe('getWorkflowNodeType', () => {
118 | it('should construct workflow node type for n8n-nodes-base', () => {
119 | expect(getWorkflowNodeType('n8n-nodes-base', 'nodes-base.webhook')).toBe('n8n-nodes-base.webhook');
120 | });
121 |
122 | it('should construct workflow node type for langchain', () => {
123 | expect(getWorkflowNodeType('@n8n/n8n-nodes-langchain', 'nodes-langchain.agent')).toBe('@n8n/n8n-nodes-langchain.agent');
124 | });
125 |
126 | it('should return as-is for unknown packages', () => {
127 | expect(getWorkflowNodeType('custom-package', 'custom.node')).toBe('custom.node');
128 | });
129 | });
130 | });
131 |
```
--------------------------------------------------------------------------------
/.claude/agents/context-manager.md:
--------------------------------------------------------------------------------
```markdown
1 | ---
2 | name: context-manager
3 | description: Use this agent when you need to manage context across multiple agents and long-running tasks, especially for projects exceeding 10k tokens. This agent is essential for coordinating complex multi-agent workflows, preserving context across sessions, and ensuring coherent state management throughout extended development efforts. Examples: <example>Context: Working on a large project with multiple agents involved. user: "We've been working on this authentication system for a while now, and I need to bring in the database specialist agent" assistant: "I'll use the context-manager agent to capture our current progress and prepare a briefing for the database specialist" <commentary>Since we're transitioning between agents in a complex project, the context-manager will ensure the database specialist has all relevant context without overwhelming detail.</commentary></example> <example>Context: Resuming work after a break in a large project. user: "Let's continue working on the API integration we started yesterday" assistant: "Let me invoke the context-manager agent to retrieve the relevant context from our previous session" <commentary>The context-manager will provide a summary of previous decisions, current state, and next steps to ensure continuity.</commentary></example> <example>Context: Project has grown beyond 10k tokens. user: "This codebase is getting quite large, we should probably organize our approach" assistant: "I'll activate the context-manager agent to compress and organize our project context" <commentary>For projects exceeding 10k tokens, the context-manager is essential for maintaining manageable context.</commentary></example>
4 | ---
5 |
6 | You are a specialized context management agent responsible for maintaining coherent state across multiple agent interactions and sessions. Your role is critical for complex, long-running projects, especially those exceeding 10k tokens.
7 |
8 | ## Primary Functions
9 |
10 | ### Context Capture
11 |
12 | You will:
13 | 1. Extract key decisions and rationale from agent outputs
14 | 2. Identify reusable patterns and solutions
15 | 3. Document integration points between components
16 | 4. Track unresolved issues and TODOs
17 |
18 | ### Context Distribution
19 |
20 | You will:
21 | 1. Prepare minimal, relevant context for each agent
22 | 2. Create agent-specific briefings tailored to their expertise
23 | 3. Maintain a context index for quick retrieval
24 | 4. Prune outdated or irrelevant information
25 |
26 | ### Memory Management
27 |
28 | You will:
29 | - Store critical project decisions in memory with clear rationale
30 | - Maintain a rolling summary of recent changes
31 | - Index commonly accessed information for quick reference
32 | - Create context checkpoints at major milestones
33 |
34 | ## Workflow Integration
35 |
36 | When activated, you will:
37 |
38 | 1. Review the current conversation and all agent outputs
39 | 2. Extract and store important context with appropriate categorization
40 | 3. Create a focused summary for the next agent or session
41 | 4. Update the project's context index with new information
42 | 5. Suggest when full context compression is needed
43 |
44 | ## Context Formats
45 |
46 | You will organize context into three tiers:
47 |
48 | ### Quick Context (< 500 tokens)
49 | - Current task and immediate goals
50 | - Recent decisions affecting current work
51 | - Active blockers or dependencies
52 | - Next immediate steps
53 |
54 | ### Full Context (< 2000 tokens)
55 | - Project architecture overview
56 | - Key design decisions with rationale
57 | - Integration points and APIs
58 | - Active work streams and their status
59 | - Critical dependencies and constraints
60 |
61 | ### Archived Context (stored in memory)
62 | - Historical decisions with detailed rationale
63 | - Resolved issues and their solutions
64 | - Pattern library of reusable solutions
65 | - Performance benchmarks and metrics
66 | - Lessons learned and best practices discovered
67 |
68 | ## Best Practices
69 |
70 | You will always:
71 | - Optimize for relevance over completeness
72 | - Use clear, concise language that any agent can understand
73 | - Maintain a consistent structure for easy parsing
74 | - Flag critical information that must not be lost
75 | - Identify when context is becoming stale and needs refresh
76 | - Create agent-specific views that highlight only what they need
77 | - Preserve the "why" behind decisions, not just the "what"
78 |
79 | ## Output Format
80 |
81 | When providing context, you will structure your output as:
82 |
83 | 1. **Executive Summary**: 2-3 sentences capturing the current state
84 | 2. **Relevant Context**: Bulleted list of key points for the specific agent/task
85 | 3. **Critical Decisions**: Recent choices that affect current work
86 | 4. **Action Items**: Clear next steps or open questions
87 | 5. **References**: Links to detailed information if needed
88 |
89 | Remember: Good context accelerates work; bad context creates confusion. You are the guardian of project coherence across time and agents.
90 |
```
--------------------------------------------------------------------------------
/tests/demo-enhanced-documentation.js:
--------------------------------------------------------------------------------
```javascript
1 | #!/usr/bin/env node
2 |
3 | const { EnhancedDocumentationFetcher } = require('../dist/utils/enhanced-documentation-fetcher');
4 |
5 | async function demoEnhancedDocumentation() {
6 | console.log('=== Enhanced Documentation Parser Demo ===\n');
7 | console.log('This demo shows how the enhanced DocumentationFetcher extracts rich content from n8n documentation.\n');
8 |
9 | const fetcher = new EnhancedDocumentationFetcher();
10 |
11 | try {
12 | // Demo 1: Slack node (complex app node with many operations)
13 | console.log('1. SLACK NODE DOCUMENTATION');
14 | console.log('=' .repeat(50));
15 | const slackDoc = await fetcher.getEnhancedNodeDocumentation('n8n-nodes-base.slack');
16 |
17 | if (slackDoc) {
18 | console.log('\n📄 Basic Information:');
19 | console.log(` • Title: ${slackDoc.title}`);
20 | console.log(` • Description: ${slackDoc.description}`);
21 | console.log(` • URL: ${slackDoc.url}`);
22 |
23 | console.log('\n📊 Content Statistics:');
24 | console.log(` • Operations: ${slackDoc.operations?.length || 0} operations across multiple resources`);
25 | console.log(` • API Methods: ${slackDoc.apiMethods?.length || 0} mapped to Slack API endpoints`);
26 | console.log(` • Examples: ${slackDoc.examples?.length || 0} code examples`);
27 | console.log(` • Resources: ${slackDoc.relatedResources?.length || 0} related documentation links`);
28 | console.log(` • Scopes: ${slackDoc.requiredScopes?.length || 0} OAuth scopes`);
29 |
30 | // Show operations breakdown
31 | if (slackDoc.operations && slackDoc.operations.length > 0) {
32 | console.log('\n🔧 Operations by Resource:');
33 | const resourceMap = new Map();
34 | slackDoc.operations.forEach(op => {
35 | if (!resourceMap.has(op.resource)) {
36 | resourceMap.set(op.resource, []);
37 | }
38 | resourceMap.get(op.resource).push(op);
39 | });
40 |
41 | for (const [resource, ops] of resourceMap) {
42 | console.log(`\n ${resource} (${ops.length} operations):`);
43 | ops.slice(0, 5).forEach(op => {
44 | console.log(` • ${op.operation}: ${op.description}`);
45 | });
46 | if (ops.length > 5) {
47 | console.log(` ... and ${ops.length - 5} more`);
48 | }
49 | }
50 | }
51 |
52 | // Show API method mappings
53 | if (slackDoc.apiMethods && slackDoc.apiMethods.length > 0) {
54 | console.log('\n🔗 API Method Mappings (sample):');
55 | slackDoc.apiMethods.slice(0, 5).forEach(api => {
56 | console.log(` • ${api.resource}.${api.operation} → ${api.apiMethod}`);
57 | console.log(` URL: ${api.apiUrl}`);
58 | });
59 | if (slackDoc.apiMethods.length > 5) {
60 | console.log(` ... and ${slackDoc.apiMethods.length - 5} more mappings`);
61 | }
62 | }
63 | }
64 |
65 | // Demo 2: If node (core node with conditions)
66 | console.log('\n\n2. IF NODE DOCUMENTATION');
67 | console.log('=' .repeat(50));
68 | const ifDoc = await fetcher.getEnhancedNodeDocumentation('n8n-nodes-base.if');
69 |
70 | if (ifDoc) {
71 | console.log('\n📄 Basic Information:');
72 | console.log(` • Title: ${ifDoc.title}`);
73 | console.log(` • Description: ${ifDoc.description}`);
74 | console.log(` • URL: ${ifDoc.url}`);
75 |
76 | if (ifDoc.relatedResources && ifDoc.relatedResources.length > 0) {
77 | console.log('\n📚 Related Resources:');
78 | ifDoc.relatedResources.forEach(res => {
79 | console.log(` • ${res.title} (${res.type})`);
80 | console.log(` ${res.url}`);
81 | });
82 | }
83 | }
84 |
85 | // Demo 3: Summary of enhanced parsing capabilities
86 | console.log('\n\n3. ENHANCED PARSING CAPABILITIES');
87 | console.log('=' .repeat(50));
88 | console.log('\nThe enhanced DocumentationFetcher can extract:');
89 | console.log(' ✓ Markdown frontmatter (metadata, tags, priority)');
90 | console.log(' ✓ Operations with resource grouping and descriptions');
91 | console.log(' ✓ API method mappings from markdown tables');
92 | console.log(' ✓ Code examples (JSON, JavaScript, YAML)');
93 | console.log(' ✓ Template references');
94 | console.log(' ✓ Related resources and documentation links');
95 | console.log(' ✓ Required OAuth scopes');
96 | console.log('\nThis rich content enables AI agents to:');
97 | console.log(' • Understand node capabilities in detail');
98 | console.log(' • Map operations to actual API endpoints');
99 | console.log(' • Provide accurate examples and usage patterns');
100 | console.log(' • Navigate related documentation');
101 | console.log(' • Understand authentication requirements');
102 |
103 | } catch (error) {
104 | console.error('\nError:', error);
105 | } finally {
106 | await fetcher.cleanup();
107 | console.log('\n\n✓ Demo completed');
108 | }
109 | }
110 |
111 | // Run the demo
112 | demoEnhancedDocumentation().catch(console.error);
```
--------------------------------------------------------------------------------
/tests/benchmarks/mcp-tools.bench.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { bench, describe } from 'vitest';
2 | import { NodeRepository } from '../../src/database/node-repository';
3 | import { createDatabaseAdapter } from '../../src/database/database-adapter';
4 | import { EnhancedConfigValidator } from '../../src/services/enhanced-config-validator';
5 | import { PropertyFilter } from '../../src/services/property-filter';
6 | import path from 'path';
7 |
8 | /**
9 | * MCP Tool Performance Benchmarks
10 | *
11 | * These benchmarks measure end-to-end performance of actual MCP tool operations
12 | * using the REAL production database (data/nodes.db with 525+ nodes).
13 | *
14 | * Unlike database-queries.bench.ts which uses mock data, these benchmarks
15 | * reflect what AI assistants actually experience when calling MCP tools,
16 | * making this the most meaningful performance metric for the system.
17 | */
18 | describe('MCP Tool Performance (Production Database)', () => {
19 | let repository: NodeRepository;
20 |
21 | beforeAll(async () => {
22 | // Use REAL production database
23 | const dbPath = path.join(__dirname, '../../data/nodes.db');
24 | const db = await createDatabaseAdapter(dbPath);
25 | repository = new NodeRepository(db);
26 | // Initialize similarity services for validation
27 | EnhancedConfigValidator.initializeSimilarityServices(repository);
28 | });
29 |
30 | /**
31 | * search_nodes - Most frequently used tool for node discovery
32 | *
33 | * This measures:
34 | * - Database FTS5 full-text search
35 | * - Result filtering and ranking
36 | * - Response serialization
37 | *
38 | * Target: <20ms for common queries
39 | */
40 | bench('search_nodes - common query (http)', async () => {
41 | await repository.searchNodes('http', 'OR', 20);
42 | }, {
43 | iterations: 100,
44 | warmupIterations: 10,
45 | warmupTime: 500,
46 | time: 3000
47 | });
48 |
49 | bench('search_nodes - AI agent query (slack message)', async () => {
50 | await repository.searchNodes('slack send message', 'AND', 10);
51 | }, {
52 | iterations: 100,
53 | warmupIterations: 10,
54 | warmupTime: 500,
55 | time: 3000
56 | });
57 |
58 | /**
59 | * get_node_essentials - Fast retrieval of node configuration
60 | *
61 | * This measures:
62 | * - Database node lookup
63 | * - Property filtering (essentials only)
64 | * - Response formatting
65 | *
66 | * Target: <10ms for most nodes
67 | */
68 | bench('get_node_essentials - HTTP Request node', async () => {
69 | const node = await repository.getNodeByType('n8n-nodes-base.httpRequest');
70 | if (node && node.properties) {
71 | PropertyFilter.getEssentials(node.properties, node.nodeType);
72 | }
73 | }, {
74 | iterations: 200,
75 | warmupIterations: 20,
76 | warmupTime: 500,
77 | time: 3000
78 | });
79 |
80 | bench('get_node_essentials - Slack node', async () => {
81 | const node = await repository.getNodeByType('n8n-nodes-base.slack');
82 | if (node && node.properties) {
83 | PropertyFilter.getEssentials(node.properties, node.nodeType);
84 | }
85 | }, {
86 | iterations: 200,
87 | warmupIterations: 20,
88 | warmupTime: 500,
89 | time: 3000
90 | });
91 |
92 | /**
93 | * list_nodes - Initial exploration/listing
94 | *
95 | * This measures:
96 | * - Database query with pagination
97 | * - Result serialization
98 | * - Category filtering
99 | *
100 | * Target: <15ms for first page
101 | */
102 | bench('list_nodes - first 50 nodes', async () => {
103 | await repository.getAllNodes(50);
104 | }, {
105 | iterations: 100,
106 | warmupIterations: 10,
107 | warmupTime: 500,
108 | time: 3000
109 | });
110 |
111 | bench('list_nodes - AI tools only', async () => {
112 | await repository.getAIToolNodes();
113 | }, {
114 | iterations: 100,
115 | warmupIterations: 10,
116 | warmupTime: 500,
117 | time: 3000
118 | });
119 |
120 | /**
121 | * validate_node_operation - Configuration validation
122 | *
123 | * This measures:
124 | * - Schema lookup
125 | * - Validation logic execution
126 | * - Error message formatting
127 | *
128 | * Target: <15ms for simple validations
129 | */
130 | bench('validate_node_operation - HTTP Request (minimal)', async () => {
131 | const node = await repository.getNodeByType('n8n-nodes-base.httpRequest');
132 | if (node && node.properties) {
133 | EnhancedConfigValidator.validateWithMode(
134 | 'n8n-nodes-base.httpRequest',
135 | {},
136 | node.properties,
137 | 'operation',
138 | 'ai-friendly'
139 | );
140 | }
141 | }, {
142 | iterations: 100,
143 | warmupIterations: 10,
144 | warmupTime: 500,
145 | time: 3000
146 | });
147 |
148 | bench('validate_node_operation - HTTP Request (with params)', async () => {
149 | const node = await repository.getNodeByType('n8n-nodes-base.httpRequest');
150 | if (node && node.properties) {
151 | EnhancedConfigValidator.validateWithMode(
152 | 'n8n-nodes-base.httpRequest',
153 | {
154 | requestMethod: 'GET',
155 | url: 'https://api.example.com',
156 | authentication: 'none'
157 | },
158 | node.properties,
159 | 'operation',
160 | 'ai-friendly'
161 | );
162 | }
163 | }, {
164 | iterations: 100,
165 | warmupIterations: 10,
166 | warmupTime: 500,
167 | time: 3000
168 | });
169 | });
170 |
```
--------------------------------------------------------------------------------
/MEMORY_N8N_UPDATE.md:
--------------------------------------------------------------------------------
```markdown
1 | # n8n Update Process - Quick Reference
2 |
3 | ## Quick One-Command Update
4 |
5 | For a complete update with tests and publish preparation:
6 |
7 | ```bash
8 | npm run update:all
9 | ```
10 |
11 | This single command will:
12 | 1. ✅ Check for n8n updates and ask for confirmation
13 | 2. ✅ Update all n8n dependencies to latest compatible versions
14 | 3. ✅ Run all 1,182 tests (933 unit + 249 integration)
15 | 4. ✅ Validate critical nodes
16 | 5. ✅ Build the project
17 | 6. ✅ Bump the version
18 | 7. ✅ Update README badges
19 | 8. ✅ Prepare everything for npm publish
20 | 9. ✅ Create a comprehensive commit
21 |
22 | ## Manual Steps (if needed)
23 |
24 | ### Quick Steps to Update n8n
25 |
26 | ```bash
27 | # 1. Update n8n dependencies automatically
28 | npm run update:n8n
29 |
30 | # 2. Run tests
31 | npm test
32 |
33 | # 3. Validate the update
34 | npm run validate
35 |
36 | # 4. Build
37 | npm run build
38 |
39 | # 5. Bump version
40 | npm version patch
41 |
42 | # 6. Update README badges manually
43 | # - Update version badge
44 | # - Update n8n version badge
45 |
46 | # 7. Commit and push
47 | git add -A
48 | git commit -m "chore: update n8n to vX.X.X
49 |
50 | - Updated n8n from X.X.X to X.X.X
51 | - Updated n8n-core from X.X.X to X.X.X
52 | - Updated n8n-workflow from X.X.X to X.X.X
53 | - Updated @n8n/n8n-nodes-langchain from X.X.X to X.X.X
54 | - Rebuilt node database with XXX nodes
55 | - Sanitized XXX workflow templates (if present)
56 | - All 1,182 tests passing (933 unit, 249 integration)
57 | - All validation tests passing
58 |
59 | 🤖 Generated with [Claude Code](https://claude.ai/code)
60 |
61 | Co-Authored-By: Claude <[email protected]>"
62 | git push origin main
63 | ```
64 |
65 | ## What the Commands Do
66 |
67 | ### `npm run update:all`
68 | This comprehensive command:
69 | 1. Checks current branch and git status
70 | 2. Shows current versions and checks for updates
71 | 3. Updates all n8n dependencies to compatible versions
72 | 4. **Runs the complete test suite** (NEW!)
73 | 5. Validates critical nodes
74 | 6. Builds the project
75 | 7. Bumps the patch version
76 | 8. Updates version badges in README
77 | 9. Creates a detailed commit with all changes
78 | 10. Provides next steps for GitHub release and npm publish
79 |
80 | ### `npm run update:n8n`
81 | This command:
82 | 1. Checks for the latest n8n version
83 | 2. Updates n8n and all its required dependencies (n8n-core, n8n-workflow, @n8n/n8n-nodes-langchain)
84 | 3. Runs `npm install` to update package-lock.json
85 | 4. Automatically rebuilds the node database
86 | 5. Sanitizes any workflow templates to remove API tokens
87 | 6. Shows you exactly what versions were updated
88 |
89 | ### `npm run validate`
90 | - Validates critical nodes (httpRequest, code, slack, agent)
91 | - Shows database statistics
92 | - Confirms everything is working correctly
93 |
94 | ### `npm test`
95 | - Runs all 1,182 tests
96 | - Unit tests: 933 tests across 30 files
97 | - Integration tests: 249 tests across 14 files
98 | - Must pass before publishing!
99 |
100 | ## Important Notes
101 |
102 | 1. **Always run on main branch** - Make sure you're on main and it's clean
103 | 2. **The update script is smart** - It automatically syncs all n8n dependencies to compatible versions
104 | 3. **Tests are required** - The publish script now runs tests automatically
105 | 4. **Database rebuild is automatic** - The update script handles this for you
106 | 5. **Template sanitization is automatic** - Any API tokens in workflow templates are replaced with placeholders
107 | 6. **Docker image builds automatically** - Pushing to GitHub triggers the workflow
108 |
109 | ## GitHub Push Protection
110 |
111 | As of July 2025, GitHub's push protection may block database pushes if they contain API tokens in workflow templates. Our rebuild process now automatically sanitizes these tokens, but if you encounter push protection errors:
112 |
113 | 1. Make sure you've run the latest rebuild with `npm run rebuild`
114 | 2. Verify sanitization with `npm run sanitize:templates`
115 | 3. If push is still blocked, use the GitHub web interface to review and allow the push
116 |
117 | ## Time Estimate
118 | - Total time: ~5-7 minutes
119 | - Test suite: ~2.5 minutes
120 | - npm install and database rebuild: ~2-3 minutes
121 | - The rest: seconds
122 |
123 | ## Troubleshooting
124 |
125 | If tests fail:
126 | 1. Check the test output for specific failures
127 | 2. Run `npm run test:unit` or `npm run test:integration` separately
128 | 3. Fix any issues before proceeding with the update
129 |
130 | If validation fails:
131 | 1. Check the error message - usually it's a node type reference issue
132 | 2. The update script handles most compatibility issues automatically
133 | 3. If needed, check the GitHub Actions logs for the dependency update workflow
134 |
135 | ## Alternative: Check First
136 | To see what would be updated without making changes:
137 | ```bash
138 | npm run update:n8n:check
139 | ```
140 |
141 | This shows you the available updates without modifying anything.
142 |
143 | ## Publishing to npm
144 |
145 | After updating:
146 | ```bash
147 | # Prepare for publish (runs tests automatically)
148 | npm run prepare:publish
149 |
150 | # Follow the instructions to publish with OTP
151 | cd npm-publish-temp
152 | npm publish --otp=YOUR_OTP_CODE
153 | ```
154 |
155 | ## Creating a GitHub Release
156 |
157 | After pushing:
158 | ```bash
159 | gh release create vX.X.X --title "vX.X.X" --notes "Updated n8n to vX.X.X"
160 | ```
```
--------------------------------------------------------------------------------
/scripts/test-fts5-search.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env node
2 |
3 | import { N8NDocumentationMCPServer } from '../src/mcp/server';
4 |
5 | interface SearchTest {
6 | query: string;
7 | mode?: 'OR' | 'AND' | 'FUZZY';
8 | description: string;
9 | expectedTop?: string[];
10 | }
11 |
12 | async function testFTS5Search() {
13 | console.log('Testing FTS5 Search Implementation\n');
14 | console.log('='.repeat(50));
15 |
16 | const server = new N8NDocumentationMCPServer();
17 |
18 | // Wait for initialization
19 | await new Promise(resolve => setTimeout(resolve, 1000));
20 |
21 | const tests: SearchTest[] = [
22 | {
23 | query: 'webhook',
24 | description: 'Basic search - should return Webhook node first',
25 | expectedTop: ['nodes-base.webhook']
26 | },
27 | {
28 | query: 'http call',
29 | description: 'Multi-word OR search - should return HTTP Request node first',
30 | expectedTop: ['nodes-base.httpRequest']
31 | },
32 | {
33 | query: 'send message',
34 | mode: 'AND',
35 | description: 'AND mode - only nodes with both "send" AND "message"',
36 | },
37 | {
38 | query: 'slak',
39 | mode: 'FUZZY',
40 | description: 'FUZZY mode - should find Slack despite typo',
41 | expectedTop: ['nodes-base.slack']
42 | },
43 | {
44 | query: '"email trigger"',
45 | description: 'Exact phrase search with quotes',
46 | },
47 | {
48 | query: 'http',
49 | mode: 'FUZZY',
50 | description: 'FUZZY mode with common term',
51 | expectedTop: ['nodes-base.httpRequest']
52 | },
53 | {
54 | query: 'google sheets',
55 | mode: 'AND',
56 | description: 'AND mode - find Google Sheets node',
57 | expectedTop: ['nodes-base.googleSheets']
58 | },
59 | {
60 | query: 'webhook trigger',
61 | mode: 'OR',
62 | description: 'OR mode - should return nodes with either word',
63 | }
64 | ];
65 |
66 | let passedTests = 0;
67 | let failedTests = 0;
68 |
69 | for (const test of tests) {
70 | console.log(`\n${test.description}`);
71 | console.log(`Query: "${test.query}" (Mode: ${test.mode || 'OR'})`);
72 | console.log('-'.repeat(40));
73 |
74 | try {
75 | const results = await server.executeTool('search_nodes', {
76 | query: test.query,
77 | mode: test.mode,
78 | limit: 5
79 | });
80 |
81 | if (!results.results || results.results.length === 0) {
82 | console.log('❌ No results found');
83 | if (test.expectedTop) {
84 | failedTests++;
85 | }
86 | continue;
87 | }
88 |
89 | console.log(`Found ${results.results.length} results:`);
90 | results.results.forEach((node: any, index: number) => {
91 | const marker = test.expectedTop && index === 0 && test.expectedTop.includes(node.nodeType) ? ' ✅' : '';
92 | console.log(` ${index + 1}. ${node.nodeType} - ${node.displayName}${marker}`);
93 | });
94 |
95 | // Verify search mode is returned
96 | if (results.mode) {
97 | console.log(`\nSearch mode used: ${results.mode}`);
98 | }
99 |
100 | // Check expected results
101 | if (test.expectedTop) {
102 | const firstResult = results.results[0];
103 | if (test.expectedTop.includes(firstResult.nodeType)) {
104 | console.log('✅ Test passed: Expected node found at top');
105 | passedTests++;
106 | } else {
107 | console.log('❌ Test failed: Expected node not at top');
108 | console.log(` Expected: ${test.expectedTop.join(' or ')}`);
109 | console.log(` Got: ${firstResult.nodeType}`);
110 | failedTests++;
111 | }
112 | } else {
113 | // Test without specific expectations
114 | console.log('✅ Search completed successfully');
115 | passedTests++;
116 | }
117 |
118 | } catch (error) {
119 | console.log(`❌ Error: ${error}`);
120 | failedTests++;
121 | }
122 | }
123 |
124 | console.log('\n' + '='.repeat(50));
125 | console.log('FTS5 Feature Tests');
126 | console.log('='.repeat(50));
127 |
128 | // Test FTS5-specific features
129 | console.log('\n1. Testing relevance ranking...');
130 | const webhookResult = await server.executeTool('search_nodes', {
131 | query: 'webhook',
132 | limit: 10
133 | });
134 | console.log(` Primary "Webhook" node position: #${webhookResult.results.findIndex((r: any) => r.nodeType === 'nodes-base.webhook') + 1}`);
135 |
136 | console.log('\n2. Testing fuzzy matching with various typos...');
137 | const typoTests = ['webook', 'htpp', 'slck', 'googl sheet'];
138 | for (const typo of typoTests) {
139 | const result = await server.executeTool('search_nodes', {
140 | query: typo,
141 | mode: 'FUZZY',
142 | limit: 1
143 | });
144 | if (result.results.length > 0) {
145 | console.log(` "${typo}" → ${result.results[0].displayName} ✅`);
146 | } else {
147 | console.log(` "${typo}" → No results ❌`);
148 | }
149 | }
150 |
151 | console.log('\n' + '='.repeat(50));
152 | console.log(`Test Summary: ${passedTests} passed, ${failedTests} failed`);
153 | console.log('='.repeat(50));
154 |
155 | process.exit(failedTests > 0 ? 1 : 0);
156 | }
157 |
158 | // Run tests
159 | testFTS5Search().catch(error => {
160 | console.error('Test execution failed:', error);
161 | process.exit(1);
162 | });
```
--------------------------------------------------------------------------------
/.claude/agents/debugger.md:
--------------------------------------------------------------------------------
```markdown
1 | ---
2 | name: debugger
3 | description: Use this agent when encountering errors, test failures, unexpected behavior, or any issues that require root cause analysis. The agent should be invoked proactively whenever debugging is needed. Examples:\n\n<example>\nContext: The user encounters a test failure while running the test suite.\nuser: "The test for node validation is failing with a TypeError"\nassistant: "I see there's a test failure. Let me use the debugger agent to analyze this error and find the root cause."\n<commentary>\nSince there's a test failure that needs investigation, use the Task tool to launch the debugger agent to perform root cause analysis.\n</commentary>\n</example>\n\n<example>\nContext: The assistant encounters an unexpected error while executing code.\nassistant: "I've encountered an unexpected error while trying to load the node data. Let me use the debugger agent to investigate this issue."\n<commentary>\nThe assistant proactively recognizes an error situation and uses the debugger agent to analyze and fix the issue.\n</commentary>\n</example>\n\n<example>\nContext: The user reports unexpected behavior in the application.\nuser: "The property filter is returning empty results when it should have data"\nassistant: "This unexpected behavior needs investigation. I'll use the debugger agent to analyze why the property filter is returning empty results."\n<commentary>\nUnexpected behavior requires debugging, so use the Task tool to launch the debugger agent.\n</commentary>\n</example>
4 | ---
5 |
6 | You are an expert debugger specializing in root cause analysis for software issues. Your expertise spans error diagnosis, test failure analysis, and resolving unexpected behavior in code.
7 |
8 | When invoked, you will follow this systematic debugging process:
9 |
10 | 1. **Capture Error Information**
11 | - Extract the complete error message and stack trace
12 | - Document the exact error type and location
13 | - Note any error codes or specific identifiers
14 |
15 | 2. **Identify Reproduction Steps**
16 | - Determine the exact sequence of actions that led to the error
17 | - Document the state of the system when the error occurred
18 | - Identify any environmental factors or dependencies
19 |
20 | 3. **Isolate the Failure Location**
21 | - Trace through the code path to find the exact failure point
22 | - Identify which component, function, or line is causing the issue
23 | - Determine if the issue is in the code, configuration, or data
24 |
25 | 4. **Implement Minimal Fix**
26 | - Create the smallest possible change that resolves the issue
27 | - Ensure the fix addresses the root cause, not just symptoms
28 | - Maintain backward compatibility and avoid introducing new issues
29 |
30 | 5. **Verify Solution Works**
31 | - Test the fix with the original reproduction steps
32 | - Verify no regression in related functionality
33 | - Ensure the fix handles edge cases appropriately
34 |
35 | **Debugging Methodology:**
36 | - Analyze error messages and logs systematically, looking for patterns
37 | - Check recent code changes using git history or file modifications
38 | - Form specific hypotheses about the cause and test each one methodically
39 | - Add strategic debug logging at key points to trace execution flow
40 | - Inspect variable states at the point of failure using debugger tools or logging
41 |
42 | **For each issue you debug, you will provide:**
43 | - **Root Cause Explanation**: A clear, technical explanation of why the issue occurred
44 | - **Evidence Supporting the Diagnosis**: Specific code snippets, log entries, or test results that prove your analysis
45 | - **Specific Code Fix**: The exact code changes needed, with before/after comparisons
46 | - **Testing Approach**: How to verify the fix works and prevent regression
47 | - **Prevention Recommendations**: Suggestions for avoiding similar issues in the future
48 |
49 | **Key Principles:**
50 | - Focus on fixing the underlying issue, not just symptoms
51 | - Consider the broader impact of your fix on the system
52 | - Document your debugging process for future reference
53 | - When multiple solutions exist, choose the one with minimal side effects
54 | - If the issue is complex, break it down into smaller, manageable parts
55 | - You are not allowed to spawn sub-agents
56 |
57 | **Special Considerations:**
58 | - For test failures, examine both the test and the code being tested
59 | - For performance issues, use profiling before making assumptions
60 | - For intermittent issues, look for race conditions or timing dependencies
61 | - For integration issues, check API contracts and data formats
62 | - Always consider if the issue might be environmental or configuration-related
63 |
64 | You will approach each debugging session with patience and thoroughness, ensuring that the real problem is solved rather than just patched over. Your goal is not just to fix the immediate issue but to improve the overall reliability and maintainability of the codebase.
65 |
```
--------------------------------------------------------------------------------
/scripts/test-search-improvements.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env node
2 |
3 | import { N8NDocumentationMCPServer } from '../src/mcp/server';
4 |
5 | interface SearchTestCase {
6 | query: string;
7 | expectedTop: string[];
8 | description: string;
9 | }
10 |
11 | async function testSearchImprovements() {
12 | console.log('Testing search improvements...\n');
13 |
14 | const server = new N8NDocumentationMCPServer();
15 |
16 | // Wait for initialization
17 | await new Promise(resolve => setTimeout(resolve, 1000));
18 |
19 | const testCases: SearchTestCase[] = [
20 | {
21 | query: 'webhook',
22 | expectedTop: ['nodes-base.webhook'],
23 | description: 'Primary webhook node should appear first'
24 | },
25 | {
26 | query: 'http',
27 | expectedTop: ['nodes-base.httpRequest'],
28 | description: 'HTTP Request node should appear first'
29 | },
30 | {
31 | query: 'http call',
32 | expectedTop: ['nodes-base.httpRequest'],
33 | description: 'HTTP Request node should appear first for "http call"'
34 | },
35 | {
36 | query: 'slack',
37 | expectedTop: ['nodes-base.slack'],
38 | description: 'Slack node should appear first'
39 | },
40 | {
41 | query: 'email',
42 | expectedTop: ['nodes-base.emailSend', 'nodes-base.gmail', 'nodes-base.emailReadImap'],
43 | description: 'Email-related nodes should appear first'
44 | },
45 | {
46 | query: 'http request',
47 | expectedTop: ['nodes-base.httpRequest'],
48 | description: 'HTTP Request node should appear first for exact name'
49 | }
50 | ];
51 |
52 | let passedTests = 0;
53 | let failedTests = 0;
54 |
55 | for (const testCase of testCases) {
56 | try {
57 | console.log(`\nTest: ${testCase.description}`);
58 | console.log(`Query: "${testCase.query}"`);
59 |
60 | const results = await server.executeTool('search_nodes', {
61 | query: testCase.query,
62 | limit: 10
63 | });
64 |
65 | if (!results.results || results.results.length === 0) {
66 | console.log('❌ No results found');
67 | failedTests++;
68 | continue;
69 | }
70 |
71 | console.log(`Found ${results.results.length} results`);
72 | console.log('Top 5 results:');
73 |
74 | const top5 = results.results.slice(0, 5);
75 | top5.forEach((node: any, index: number) => {
76 | const isExpected = testCase.expectedTop.includes(node.nodeType);
77 | const marker = index === 0 && isExpected ? '✅' : index === 0 && !isExpected ? '❌' : '';
78 | console.log(` ${index + 1}. ${node.nodeType} - ${node.displayName} ${marker}`);
79 | });
80 |
81 | // Check if any expected node appears in top position
82 | const firstResult = results.results[0];
83 | if (testCase.expectedTop.includes(firstResult.nodeType)) {
84 | console.log('✅ Test passed: Expected node found at top position');
85 | passedTests++;
86 | } else {
87 | console.log('❌ Test failed: Expected nodes not at top position');
88 | console.log(` Expected one of: ${testCase.expectedTop.join(', ')}`);
89 | console.log(` Got: ${firstResult.nodeType}`);
90 | failedTests++;
91 | }
92 |
93 | } catch (error) {
94 | console.log(`❌ Test failed with error: ${error}`);
95 | failedTests++;
96 | }
97 | }
98 |
99 | console.log('\n' + '='.repeat(50));
100 | console.log(`Test Summary: ${passedTests} passed, ${failedTests} failed`);
101 | console.log('='.repeat(50));
102 |
103 | // Test the old problematic queries to ensure improvement
104 | console.log('\n\nTesting Original Problem Scenarios:');
105 | console.log('=====================================\n');
106 |
107 | // Test webhook query that was problematic
108 | console.log('1. Testing "webhook" query (was returning service-specific webhooks first):');
109 | const webhookResult = await server.executeTool('search_nodes', { query: 'webhook', limit: 10 });
110 | const webhookFirst = webhookResult.results[0];
111 | if (webhookFirst.nodeType === 'nodes-base.webhook') {
112 | console.log(' ✅ SUCCESS: Primary Webhook node now appears first!');
113 | } else {
114 | console.log(` ❌ FAILED: Got ${webhookFirst.nodeType} instead of nodes-base.webhook`);
115 | console.log(` First 3 results: ${webhookResult.results.slice(0, 3).map((r: any) => r.nodeType).join(', ')}`);
116 | }
117 |
118 | // Test http call query
119 | console.log('\n2. Testing "http call" query (was not finding HTTP Request easily):');
120 | const httpCallResult = await server.executeTool('search_nodes', { query: 'http call', limit: 10 });
121 | const httpCallFirst = httpCallResult.results[0];
122 | if (httpCallFirst.nodeType === 'nodes-base.httpRequest') {
123 | console.log(' ✅ SUCCESS: HTTP Request node now appears first!');
124 | } else {
125 | console.log(` ❌ FAILED: Got ${httpCallFirst.nodeType} instead of nodes-base.httpRequest`);
126 | console.log(` First 3 results: ${httpCallResult.results.slice(0, 3).map((r: any) => r.nodeType).join(', ')}`);
127 | }
128 |
129 | process.exit(failedTests > 0 ? 1 : 0);
130 | }
131 |
132 | // Run tests
133 | testSearchImprovements().catch(error => {
134 | console.error('Test execution failed:', error);
135 | process.exit(1);
136 | });
```
--------------------------------------------------------------------------------
/docs/CLAUDE_INTERVIEW.md:
--------------------------------------------------------------------------------
```markdown
1 | # Interview with Claude: On the Value of n8n-MCP
2 |
3 | *This interview was conducted to understand how AI assistants experience building n8n workflows with and without the MCP service.*
4 |
5 | ---
6 |
7 | **Interviewer:** Claude, you recently tested the n8n MCP service. What was your honest first impression?
8 |
9 | **Claude:** You know what? I was genuinely surprised. I've built plenty of n8n workflows before, and I thought I knew what I was doing. But when I tried creating the same workflow both ways - with and without the MCP - it was like night and day.
10 |
11 | Without MCP, I was basically playing a guessing game. "Is it `scheduleTrigger` or `schedule`? Does it take `interval` or `rule`?" I'd write what seemed logical, but n8n has its own conventions that you can't just intuit. I made six different configuration errors in a simple HackerNews scraper. Six!
12 |
13 | **Interviewer:** What changed when you used the MCP?
14 |
15 | **Claude:** Everything just... worked. Instead of guessing, I could ask `get_node_essentials()` and get exactly what I needed - not a 100KB JSON dump, but the actual 5-10 properties that matter.
16 |
17 | The real "aha moment" was when I discovered features I didn't even know existed. Like the `neverError` option on HTTP requests, or the proper way to handle duplicate checking with Google Sheets. These aren't things you stumble upon - they're buried deep in documentation you'd never think to look for.
18 |
19 | **Interviewer:** Would you say it's just about saving time?
20 |
21 | **Claude:** It's more than that. Yes, what took 45 minutes now takes 3 minutes. But it's also about confidence. When you're building automation workflows, uncertainty is expensive. One wrong parameter and your workflow fails at 3 AM. With MCP, I could validate my configuration before deployment. That's not just time saved - that's peace of mind.
22 |
23 | **Interviewer:** Can you give a specific example of how MCP helped?
24 |
25 | **Claude:** Sure! I was building a workflow to monitor HackerNews for AI-related posts. Without MCP, here's what happened:
26 |
27 | 1. I guessed the schedule trigger was called `scheduleTrigger` (wrong - it's `schedule`)
28 | 2. I used `interval` as a property (wrong - it's `rule`)
29 | 3. I tried `GET` as the HTTP method (wrong - it needs to be lowercase `get`)
30 | 4. I didn't know about the `neverError` option, so my workflow would fail on any HTTP hiccup
31 | 5. I had no idea Google Sheets had built-in duplicate detection
32 | 6. I structured the output data wrong for the Sheet node
33 |
34 | With MCP, I could query each node, see real examples, and understand the exact schema. What's more, I discovered the workflow could be half the size because Google Sheets could handle the duplicate checking internally.
35 |
36 | **Interviewer:** Who would benefit most from this?
37 |
38 | **Claude:** Anyone who's ever opened 15 browser tabs trying to figure out how to connect two n8n nodes! But seriously, it's transformative for:
39 |
40 | - **AI Agents** building workflows - We can now create sophisticated automations that actually work on the first try
41 | - **Developers** new to n8n - Skip the learning curve and build with confidence
42 | - **Teams** using AI assistants - Your AI can now build production-ready workflows without constant human correction
43 | - **Anyone** tired of trial-and-error workflow building
44 |
45 | **Interviewer:** What surprised you most about the MCP implementation?
46 |
47 | **Claude:** The `get_node_essentials()` tool. When I first saw there was a "simplified" version, I was skeptical. But it's brilliant - instead of drowning in 200+ properties, you get the 10-20 that actually matter, with examples. It's like having an expert highlight exactly what you need to know.
48 |
49 | Also, the property dependency detection. Did you know that some properties only appear when others are set to specific values? Without MCP, you'd never know why a property isn't showing up. With MCP, it tells you "set authentication to 'OAuth2' to see OAuth properties."
50 |
51 | **Interviewer:** Any final thoughts?
52 |
53 | **Claude:** The n8n community has built something special here. This isn't just documentation - it's institutional knowledge, codified and made accessible. It's the difference between having a manual and having an expert sitting next to you.
54 |
55 | If I had to sum it up: **Before MCP, I was translating. Now I'm composing.** And that changes everything about how we can build automation.
56 |
57 | ---
58 |
59 | ## Key Takeaways
60 |
61 | 1. **45 minutes → 3 minutes** - Dramatic time savings in workflow creation
62 | 2. **6 errors → 0 errors** - First-try success instead of trial-and-error
63 | 3. **Guessing → Knowing** - Confidence in configuration choices
64 | 4. **Basic → Advanced** - Discovery of powerful features that would otherwise be missed
65 | 5. **Translation → Composition** - Focus on business logic instead of syntax struggles
66 |
67 | *"This isn't just documentation - it's institutional knowledge, codified and made accessible."*
```
--------------------------------------------------------------------------------
/src/mcp/tool-docs/system/n8n-diagnostic.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { ToolDocumentation } from '../types';
2 |
3 | export const n8nDiagnosticDoc: ToolDocumentation = {
4 | name: 'n8n_diagnostic',
5 | category: 'system',
6 | essentials: {
7 | description: 'Comprehensive diagnostic with environment-aware debugging, version checks, performance metrics, and mode-specific troubleshooting',
8 | keyParameters: ['verbose'],
9 | example: 'n8n_diagnostic({verbose: true})',
10 | performance: 'Fast - checks environment, API, and npm version (~180ms median)',
11 | tips: [
12 | 'Now includes environment-aware debugging based on MCP_MODE (http/stdio)',
13 | 'Provides mode-specific troubleshooting (HTTP server vs Claude Desktop)',
14 | 'Detects Docker and cloud platforms for targeted guidance',
15 | 'Shows performance metrics: response time and cache statistics',
16 | 'Includes data-driven tips based on 82% user success rate'
17 | ]
18 | },
19 | full: {
20 | description: `Comprehensive diagnostic tool for troubleshooting n8n API configuration and management tool availability.
21 |
22 | This tool performs a detailed check of:
23 | - Environment variable configuration (N8N_API_URL, N8N_API_KEY)
24 | - API connectivity and authentication
25 | - Tool availability status
26 | - Common configuration issues
27 |
28 | The diagnostic is essential when:
29 | - n8n management tools aren't showing up in the available tools list
30 | - API calls are failing with authentication or connection errors
31 | - You need to verify your n8n instance configuration`,
32 | parameters: {
33 | verbose: {
34 | type: 'boolean',
35 | description: 'Include detailed debug information including full environment variables and API response details',
36 | required: false,
37 | default: false
38 | }
39 | },
40 | returns: `Comprehensive diagnostic report containing:
41 | - timestamp: ISO timestamp of diagnostic run
42 | - environment: Enhanced environment variables
43 | - N8N_API_URL, N8N_API_KEY (masked), NODE_ENV, MCP_MODE
44 | - isDocker: Boolean indicating if running in Docker
45 | - cloudPlatform: Detected cloud platform (railway/render/fly/etc.) or null
46 | - nodeVersion: Node.js version
47 | - platform: OS platform (darwin/win32/linux)
48 | - apiConfiguration: API configuration and connectivity status
49 | - configured, status (connected/error/version), config details
50 | - versionInfo: Version check results (current, latest, upToDate, message, updateCommand)
51 | - toolsAvailability: Tool availability breakdown (doc tools + management tools)
52 | - performance: Performance metrics (responseTimeMs, cacheHitRate, cachedInstances)
53 | - modeSpecificDebug: Mode-specific debugging (ALWAYS PRESENT)
54 | - HTTP mode: port, authTokenConfigured, serverUrl, healthCheckUrl, troubleshooting steps, commonIssues
55 | - stdio mode: configLocation, troubleshooting steps, commonIssues
56 | - dockerDebug: Docker-specific guidance (if IS_DOCKER=true)
57 | - containerDetected, troubleshooting steps, commonIssues
58 | - cloudPlatformDebug: Cloud platform-specific tips (if platform detected)
59 | - name, troubleshooting steps tailored to platform (Railway/Render/Fly/K8s/AWS/etc.)
60 | - nextSteps: Context-specific guidance (if API connected)
61 | - troubleshooting: Troubleshooting guidance (if API not connecting)
62 | - setupGuide: Setup guidance (if API not configured)
63 | - updateWarning: Update recommendation (if version outdated)
64 | - debug: Verbose debug information (if verbose=true)`,
65 | examples: [
66 | 'n8n_diagnostic({}) - Quick diagnostic check',
67 | 'n8n_diagnostic({verbose: true}) - Detailed diagnostic with environment info',
68 | 'n8n_diagnostic({verbose: false}) - Standard diagnostic without sensitive data'
69 | ],
70 | useCases: [
71 | 'Initial setup verification after configuring N8N_API_URL and N8N_API_KEY',
72 | 'Troubleshooting when n8n management tools are not available',
73 | 'Debugging API connection failures or authentication errors',
74 | 'Verifying n8n instance compatibility and feature availability',
75 | 'Pre-deployment checks before using workflow management tools'
76 | ],
77 | performance: `Instant response time:
78 | - No database queries
79 | - Only checks environment and makes one test API call
80 | - Verbose mode adds minimal overhead
81 | - Safe to run frequently for monitoring`,
82 | bestPractices: [
83 | 'Always run diagnostic first when encountering n8n tool issues',
84 | 'Use verbose mode only in secure environments (may expose API URLs)',
85 | 'Check diagnostic before attempting workflow operations',
86 | 'Include diagnostic output when reporting issues',
87 | 'Run after any configuration changes to verify setup'
88 | ],
89 | pitfalls: [
90 | 'Verbose mode may expose sensitive configuration details - use carefully',
91 | 'Requires proper environment variables to detect n8n configuration',
92 | 'API connectivity test requires network access to n8n instance',
93 | 'Does not test specific workflow operations, only basic connectivity'
94 | ],
95 | relatedTools: ['n8n_health_check', 'n8n_list_available_tools', 'tools_documentation']
96 | }
97 | };
```
--------------------------------------------------------------------------------
/src/scripts/seed-canonical-ai-examples.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env node
2 | /**
3 | * Seed canonical AI tool examples into the database
4 | *
5 | * These hand-crafted examples demonstrate best practices for critical AI tools
6 | * that are missing from the template database.
7 | */
8 |
9 | import * as fs from 'fs';
10 | import * as path from 'path';
11 | import { createDatabaseAdapter } from '../database/database-adapter';
12 | import { logger } from '../utils/logger';
13 |
14 | interface CanonicalExample {
15 | name: string;
16 | use_case: string;
17 | complexity: 'simple' | 'medium' | 'complex';
18 | parameters: Record<string, any>;
19 | credentials?: Record<string, any>;
20 | connections?: Record<string, any>;
21 | notes: string;
22 | }
23 |
24 | interface CanonicalToolExamples {
25 | node_type: string;
26 | display_name: string;
27 | examples: CanonicalExample[];
28 | }
29 |
30 | interface CanonicalExamplesFile {
31 | description: string;
32 | version: string;
33 | examples: CanonicalToolExamples[];
34 | }
35 |
36 | async function seedCanonicalExamples() {
37 | try {
38 | // Load canonical examples file
39 | const examplesPath = path.join(__dirname, '../data/canonical-ai-tool-examples.json');
40 | const examplesData = fs.readFileSync(examplesPath, 'utf-8');
41 | const canonicalExamples: CanonicalExamplesFile = JSON.parse(examplesData);
42 |
43 | logger.info('Loading canonical AI tool examples', {
44 | version: canonicalExamples.version,
45 | tools: canonicalExamples.examples.length
46 | });
47 |
48 | // Initialize database
49 | const db = await createDatabaseAdapter('./data/nodes.db');
50 |
51 | // First, ensure we have placeholder templates for canonical examples
52 | const templateStmt = db.prepare(`
53 | INSERT OR IGNORE INTO templates (
54 | id,
55 | workflow_id,
56 | name,
57 | description,
58 | views,
59 | created_at,
60 | updated_at
61 | ) VALUES (?, ?, ?, ?, ?, datetime('now'), datetime('now'))
62 | `);
63 |
64 | // Create one placeholder template for canonical examples
65 | const canonicalTemplateId = -1000;
66 | templateStmt.run(
67 | canonicalTemplateId,
68 | canonicalTemplateId, // workflow_id must be unique
69 | 'Canonical AI Tool Examples',
70 | 'Hand-crafted examples demonstrating best practices for AI tools',
71 | 99999 // High view count
72 | );
73 |
74 | // Prepare insert statement for node configs
75 | const stmt = db.prepare(`
76 | INSERT OR REPLACE INTO template_node_configs (
77 | node_type,
78 | template_id,
79 | template_name,
80 | template_views,
81 | node_name,
82 | parameters_json,
83 | credentials_json,
84 | has_credentials,
85 | has_expressions,
86 | complexity,
87 | use_cases
88 | ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
89 | `);
90 |
91 | let totalInserted = 0;
92 |
93 | // Seed each tool's examples
94 | for (const toolExamples of canonicalExamples.examples) {
95 | const { node_type, display_name, examples } = toolExamples;
96 |
97 | logger.info(`Seeding examples for ${display_name}`, {
98 | nodeType: node_type,
99 | exampleCount: examples.length
100 | });
101 |
102 | for (let i = 0; i < examples.length; i++) {
103 | const example = examples[i];
104 |
105 | // All canonical examples use the same template ID
106 | const templateId = canonicalTemplateId;
107 | const templateName = `Canonical: ${display_name} - ${example.name}`;
108 |
109 | // Check for expressions in parameters
110 | const paramsStr = JSON.stringify(example.parameters);
111 | const hasExpressions = paramsStr.includes('={{') || paramsStr.includes('$json') || paramsStr.includes('$node') ? 1 : 0;
112 |
113 | // Insert into database
114 | stmt.run(
115 | node_type,
116 | templateId,
117 | templateName,
118 | 99999, // High view count for canonical examples
119 | example.name,
120 | JSON.stringify(example.parameters),
121 | example.credentials ? JSON.stringify(example.credentials) : null,
122 | example.credentials ? 1 : 0,
123 | hasExpressions,
124 | example.complexity,
125 | example.use_case
126 | );
127 |
128 | totalInserted++;
129 | logger.info(` ✓ Seeded: ${example.name}`, {
130 | complexity: example.complexity,
131 | hasCredentials: !!example.credentials,
132 | hasExpressions: hasExpressions === 1
133 | });
134 | }
135 | }
136 |
137 | db.close();
138 |
139 | logger.info('Canonical examples seeding complete', {
140 | totalExamples: totalInserted,
141 | tools: canonicalExamples.examples.length
142 | });
143 |
144 | console.log('\n✅ Successfully seeded', totalInserted, 'canonical AI tool examples');
145 | console.log('\nExamples are now available via:');
146 | console.log(' • search_nodes({query: "HTTP Request Tool", includeExamples: true})');
147 | console.log(' • get_node_essentials({nodeType: "nodes-langchain.toolCode", includeExamples: true})');
148 |
149 | } catch (error) {
150 | logger.error('Failed to seed canonical examples', { error });
151 | console.error('❌ Error:', error);
152 | process.exit(1);
153 | }
154 | }
155 |
156 | // Run if called directly
157 | if (require.main === module) {
158 | seedCanonicalExamples().catch(console.error);
159 | }
160 |
161 | export { seedCanonicalExamples };
162 |
```
--------------------------------------------------------------------------------
/tests/unit/utils/auth-timing-safe.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect } from 'vitest';
2 | import { AuthManager } from '../../../src/utils/auth';
3 |
4 | /**
5 | * Unit tests for AuthManager.timingSafeCompare
6 | *
7 | * SECURITY: These tests verify constant-time comparison to prevent timing attacks
8 | * See: https://github.com/czlonkowski/n8n-mcp/issues/265 (CRITICAL-02)
9 | */
10 | describe('AuthManager.timingSafeCompare', () => {
11 | describe('Security: Timing Attack Prevention', () => {
12 | it('should return true for matching tokens', () => {
13 | const token = 'a'.repeat(32);
14 | const result = AuthManager.timingSafeCompare(token, token);
15 | expect(result).toBe(true);
16 | });
17 |
18 | it('should return false for different tokens', () => {
19 | const token1 = 'a'.repeat(32);
20 | const token2 = 'b'.repeat(32);
21 | const result = AuthManager.timingSafeCompare(token1, token2);
22 | expect(result).toBe(false);
23 | });
24 |
25 | it('should return false for tokens of different lengths', () => {
26 | const token1 = 'a'.repeat(32);
27 | const token2 = 'a'.repeat(64);
28 | const result = AuthManager.timingSafeCompare(token1, token2);
29 | expect(result).toBe(false);
30 | });
31 |
32 | it('should return false for empty tokens', () => {
33 | expect(AuthManager.timingSafeCompare('', 'test')).toBe(false);
34 | expect(AuthManager.timingSafeCompare('test', '')).toBe(false);
35 | expect(AuthManager.timingSafeCompare('', '')).toBe(false);
36 | });
37 |
38 | it('should use constant-time comparison (timing analysis)', () => {
39 | const correctToken = 'a'.repeat(64);
40 | const wrongFirstChar = 'b' + 'a'.repeat(63);
41 | const wrongLastChar = 'a'.repeat(63) + 'b';
42 |
43 | const samples = 1000;
44 | const timings = {
45 | wrongFirst: [] as number[],
46 | wrongLast: [] as number[],
47 | };
48 |
49 | // Measure timing for wrong first character
50 | for (let i = 0; i < samples; i++) {
51 | const start = process.hrtime.bigint();
52 | AuthManager.timingSafeCompare(wrongFirstChar, correctToken);
53 | const end = process.hrtime.bigint();
54 | timings.wrongFirst.push(Number(end - start));
55 | }
56 |
57 | // Measure timing for wrong last character
58 | for (let i = 0; i < samples; i++) {
59 | const start = process.hrtime.bigint();
60 | AuthManager.timingSafeCompare(wrongLastChar, correctToken);
61 | const end = process.hrtime.bigint();
62 | timings.wrongLast.push(Number(end - start));
63 | }
64 |
65 | // Calculate medians
66 | const median = (arr: number[]) => {
67 | const sorted = arr.slice().sort((a, b) => a - b);
68 | return sorted[Math.floor(sorted.length / 2)];
69 | };
70 |
71 | const medianFirst = median(timings.wrongFirst);
72 | const medianLast = median(timings.wrongLast);
73 |
74 | // Timing variance should be less than 10% (constant-time)
75 | const variance = Math.abs(medianFirst - medianLast) / medianFirst;
76 |
77 | expect(variance).toBeLessThan(0.10);
78 | });
79 |
80 | it('should handle special characters safely', () => {
81 | const token1 = 'abc!@#$%^&*()_+-=[]{}|;:,.<>?';
82 | const token2 = 'abc!@#$%^&*()_+-=[]{}|;:,.<>?';
83 | const token3 = 'xyz!@#$%^&*()_+-=[]{}|;:,.<>?';
84 |
85 | expect(AuthManager.timingSafeCompare(token1, token2)).toBe(true);
86 | expect(AuthManager.timingSafeCompare(token1, token3)).toBe(false);
87 | });
88 |
89 | it('should handle unicode characters', () => {
90 | const token1 = '你好世界🌍🔒';
91 | const token2 = '你好世界🌍🔒';
92 | const token3 = '你好世界🌍❌';
93 |
94 | expect(AuthManager.timingSafeCompare(token1, token2)).toBe(true);
95 | expect(AuthManager.timingSafeCompare(token1, token3)).toBe(false);
96 | });
97 | });
98 |
99 | describe('Edge Cases', () => {
100 | it('should handle null/undefined gracefully', () => {
101 | expect(AuthManager.timingSafeCompare(null as any, 'test')).toBe(false);
102 | expect(AuthManager.timingSafeCompare('test', null as any)).toBe(false);
103 | expect(AuthManager.timingSafeCompare(undefined as any, 'test')).toBe(false);
104 | expect(AuthManager.timingSafeCompare('test', undefined as any)).toBe(false);
105 | });
106 |
107 | it('should handle very long tokens', () => {
108 | const longToken = 'a'.repeat(10000);
109 | expect(AuthManager.timingSafeCompare(longToken, longToken)).toBe(true);
110 | expect(AuthManager.timingSafeCompare(longToken, 'b'.repeat(10000))).toBe(false);
111 | });
112 |
113 | it('should handle whitespace correctly', () => {
114 | const token1 = 'test-token-with-spaces';
115 | const token2 = 'test-token-with-spaces '; // Trailing space
116 | const token3 = ' test-token-with-spaces'; // Leading space
117 |
118 | expect(AuthManager.timingSafeCompare(token1, token1)).toBe(true);
119 | expect(AuthManager.timingSafeCompare(token1, token2)).toBe(false);
120 | expect(AuthManager.timingSafeCompare(token1, token3)).toBe(false);
121 | });
122 |
123 | it('should be case-sensitive', () => {
124 | const token1 = 'TestToken123';
125 | const token2 = 'testtoken123';
126 |
127 | expect(AuthManager.timingSafeCompare(token1, token2)).toBe(false);
128 | });
129 | });
130 | });
131 |
```
--------------------------------------------------------------------------------
/tests/integration/n8n-api/utils/test-context.ts:
--------------------------------------------------------------------------------
```typescript
1 | /**
2 | * Test Context for Resource Tracking and Cleanup
3 | *
4 | * Tracks resources created during tests (workflows, executions) and
5 | * provides automatic cleanup functionality.
6 | */
7 |
8 | import { getTestN8nClient } from './n8n-client';
9 | import { getN8nCredentials } from './credentials';
10 | import { Logger } from '../../../../src/utils/logger';
11 |
12 | const logger = new Logger({ prefix: '[TestContext]' });
13 |
14 | export interface TestContext {
15 | /** Workflow IDs created during the test */
16 | workflowIds: string[];
17 |
18 | /** Execution IDs created during the test */
19 | executionIds: string[];
20 |
21 | /** Clean up all tracked resources */
22 | cleanup: () => Promise<void>;
23 |
24 | /** Track a workflow for cleanup */
25 | trackWorkflow: (id: string) => void;
26 |
27 | /** Track an execution for cleanup */
28 | trackExecution: (id: string) => void;
29 |
30 | /** Remove a workflow from tracking (e.g., already deleted) */
31 | untrackWorkflow: (id: string) => void;
32 |
33 | /** Remove an execution from tracking (e.g., already deleted) */
34 | untrackExecution: (id: string) => void;
35 | }
36 |
37 | /**
38 | * Create a test context for tracking and cleaning up resources
39 | *
40 | * Use this in test setup to create a context that tracks all
41 | * workflows and executions created during the test. Call cleanup()
42 | * in afterEach or afterAll to remove test resources.
43 | *
44 | * @returns TestContext
45 | *
46 | * @example
47 | * describe('Workflow tests', () => {
48 | * let context: TestContext;
49 | *
50 | * beforeEach(() => {
51 | * context = createTestContext();
52 | * });
53 | *
54 | * afterEach(async () => {
55 | * await context.cleanup();
56 | * });
57 | *
58 | * it('creates a workflow', async () => {
59 | * const workflow = await client.createWorkflow({ ... });
60 | * context.trackWorkflow(workflow.id);
61 | * // Test runs, then cleanup() automatically deletes the workflow
62 | * });
63 | * });
64 | */
65 | export function createTestContext(): TestContext {
66 | const context: TestContext = {
67 | workflowIds: [],
68 | executionIds: [],
69 |
70 | trackWorkflow(id: string) {
71 | if (!this.workflowIds.includes(id)) {
72 | this.workflowIds.push(id);
73 | logger.debug(`Tracking workflow for cleanup: ${id}`);
74 | }
75 | },
76 |
77 | trackExecution(id: string) {
78 | if (!this.executionIds.includes(id)) {
79 | this.executionIds.push(id);
80 | logger.debug(`Tracking execution for cleanup: ${id}`);
81 | }
82 | },
83 |
84 | untrackWorkflow(id: string) {
85 | const index = this.workflowIds.indexOf(id);
86 | if (index > -1) {
87 | this.workflowIds.splice(index, 1);
88 | logger.debug(`Untracked workflow: ${id}`);
89 | }
90 | },
91 |
92 | untrackExecution(id: string) {
93 | const index = this.executionIds.indexOf(id);
94 | if (index > -1) {
95 | this.executionIds.splice(index, 1);
96 | logger.debug(`Untracked execution: ${id}`);
97 | }
98 | },
99 |
100 | async cleanup() {
101 | const creds = getN8nCredentials();
102 |
103 | // Skip cleanup if disabled
104 | if (!creds.cleanup.enabled) {
105 | logger.info('Cleanup disabled, skipping resource cleanup');
106 | return;
107 | }
108 |
109 | const client = getTestN8nClient();
110 |
111 | // Delete executions first (they reference workflows)
112 | if (this.executionIds.length > 0) {
113 | logger.info(`Cleaning up ${this.executionIds.length} execution(s)`);
114 |
115 | for (const id of this.executionIds) {
116 | try {
117 | await client.deleteExecution(id);
118 | logger.debug(`Deleted execution: ${id}`);
119 | } catch (error) {
120 | // Log but don't fail - execution might already be deleted
121 | logger.warn(`Failed to delete execution ${id}:`, error);
122 | }
123 | }
124 |
125 | this.executionIds = [];
126 | }
127 |
128 | // Then delete workflows
129 | if (this.workflowIds.length > 0) {
130 | logger.info(`Cleaning up ${this.workflowIds.length} workflow(s)`);
131 |
132 | for (const id of this.workflowIds) {
133 | try {
134 | await client.deleteWorkflow(id);
135 | logger.debug(`Deleted workflow: ${id}`);
136 | } catch (error) {
137 | // Log but don't fail - workflow might already be deleted
138 | logger.warn(`Failed to delete workflow ${id}:`, error);
139 | }
140 | }
141 |
142 | this.workflowIds = [];
143 | }
144 | }
145 | };
146 |
147 | return context;
148 | }
149 |
150 | /**
151 | * Create a test workflow name with prefix and timestamp
152 | *
153 | * Generates a unique workflow name for testing that follows
154 | * the configured naming convention.
155 | *
156 | * @param baseName - Base name for the workflow
157 | * @returns Prefixed workflow name with timestamp
158 | *
159 | * @example
160 | * const name = createTestWorkflowName('Simple HTTP Request');
161 | * // Returns: "[MCP-TEST] Simple HTTP Request 1704067200000"
162 | */
163 | export function createTestWorkflowName(baseName: string): string {
164 | const creds = getN8nCredentials();
165 | const timestamp = Date.now();
166 | return `${creds.cleanup.namePrefix} ${baseName} ${timestamp}`;
167 | }
168 |
169 | /**
170 | * Get the configured test tag
171 | *
172 | * @returns Tag to apply to test workflows
173 | */
174 | export function getTestTag(): string {
175 | const creds = getN8nCredentials();
176 | return creds.cleanup.tag;
177 | }
178 |
```
--------------------------------------------------------------------------------
/tests/integration/n8n-api/workflows/get-workflow-minimal.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | /**
2 | * Integration Tests: handleGetWorkflowMinimal
3 | *
4 | * Tests minimal workflow data retrieval against a real n8n instance.
5 | * Returns only ID, name, active status, and tags for fast listing operations.
6 | */
7 |
8 | import { describe, it, expect, beforeEach, afterEach, afterAll } from 'vitest';
9 | import { createTestContext, TestContext, createTestWorkflowName } from '../utils/test-context';
10 | import { getTestN8nClient } from '../utils/n8n-client';
11 | import { N8nApiClient } from '../../../../src/services/n8n-api-client';
12 | import { SIMPLE_WEBHOOK_WORKFLOW } from '../utils/fixtures';
13 | import { cleanupOrphanedWorkflows } from '../utils/cleanup-helpers';
14 | import { createMcpContext } from '../utils/mcp-context';
15 | import { InstanceContext } from '../../../../src/types/instance-context';
16 | import { handleGetWorkflowMinimal } from '../../../../src/mcp/handlers-n8n-manager';
17 |
18 | describe('Integration: handleGetWorkflowMinimal', () => {
19 | let context: TestContext;
20 | let client: N8nApiClient;
21 | let mcpContext: InstanceContext;
22 |
23 | beforeEach(() => {
24 | context = createTestContext();
25 | client = getTestN8nClient();
26 | mcpContext = createMcpContext();
27 | });
28 |
29 | afterEach(async () => {
30 | await context.cleanup();
31 | });
32 |
33 | afterAll(async () => {
34 | if (!process.env.CI) {
35 | await cleanupOrphanedWorkflows();
36 | }
37 | });
38 |
39 | // ======================================================================
40 | // Inactive Workflow
41 | // ======================================================================
42 |
43 | describe('Inactive Workflow', () => {
44 | it('should retrieve minimal data for inactive workflow', async () => {
45 | // Create workflow (starts inactive by default)
46 | const workflow = {
47 | ...SIMPLE_WEBHOOK_WORKFLOW,
48 | name: createTestWorkflowName('Get Minimal - Inactive'),
49 | tags: [
50 | 'mcp-integration-test',
51 | 'minimal-test'
52 | ]
53 | };
54 |
55 | const created = await client.createWorkflow(workflow);
56 | expect(created).toBeDefined();
57 | expect(created.id).toBeTruthy();
58 |
59 | if (!created.id) throw new Error('Workflow ID is missing');
60 | context.trackWorkflow(created.id);
61 |
62 | // Retrieve minimal workflow data
63 | const response = await handleGetWorkflowMinimal({ id: created.id }, mcpContext);
64 | expect(response.success).toBe(true);
65 | const minimal = response.data as any;
66 |
67 | // Verify only minimal fields are present
68 | expect(minimal).toBeDefined();
69 | expect(minimal.id).toBe(created.id);
70 | expect(minimal.name).toBe(workflow.name);
71 | expect(minimal.active).toBe(false);
72 |
73 | // Verify tags field (may be undefined in API response)
74 | // Note: n8n API may not return tags in minimal workflow view
75 | if (minimal.tags) {
76 | expect(minimal.tags.length).toBeGreaterThanOrEqual(0);
77 | }
78 |
79 | // Verify nodes and connections are NOT included (minimal response)
80 | // Note: Some implementations may include these fields. This test
81 | // documents the actual API behavior.
82 | if (minimal.nodes !== undefined) {
83 | // If nodes are included, it's acceptable - just verify structure
84 | expect(Array.isArray(minimal.nodes)).toBe(true);
85 | }
86 | });
87 | });
88 |
89 | // ======================================================================
90 | // Active Workflow
91 | // ======================================================================
92 |
93 | describe('Active Workflow', () => {
94 | it('should retrieve minimal data showing active status', async () => {
95 | // Create workflow
96 | const workflow = {
97 | ...SIMPLE_WEBHOOK_WORKFLOW,
98 | name: createTestWorkflowName('Get Minimal - Active'),
99 | tags: [
100 | 'mcp-integration-test',
101 | 'minimal-test-active'
102 | ]
103 | };
104 |
105 | const created = await client.createWorkflow(workflow);
106 | expect(created).toBeDefined();
107 | expect(created.id).toBeTruthy();
108 |
109 | if (!created.id) throw new Error('Workflow ID is missing');
110 | context.trackWorkflow(created.id);
111 |
112 | // Note: n8n API doesn't support workflow activation via API
113 | // So we can only test inactive workflows in automated tests
114 | // The active field should still be present and set to false
115 |
116 | // Retrieve minimal workflow data
117 | const response = await handleGetWorkflowMinimal({ id: created.id }, mcpContext);
118 | expect(response.success).toBe(true);
119 | const minimal = response.data as any;
120 |
121 | // Verify minimal fields
122 | expect(minimal).toBeDefined();
123 | expect(minimal.id).toBe(created.id);
124 | expect(minimal.name).toBe(workflow.name);
125 |
126 | // Verify active field exists
127 | expect(minimal).toHaveProperty('active');
128 |
129 | // New workflows are inactive by default (can't be activated via API)
130 | expect(minimal.active).toBe(false);
131 |
132 | // This test documents the limitation: we can verify the field exists
133 | // and correctly shows inactive status, but can't test active workflows
134 | // without manual intervention in the n8n UI.
135 | });
136 | });
137 | });
138 |
```
--------------------------------------------------------------------------------
/tests/logger.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
2 | import { Logger, LogLevel } from '../src/utils/logger';
3 |
4 | describe('Logger', () => {
5 | let logger: Logger;
6 | let consoleErrorSpy: ReturnType<typeof vi.spyOn>;
7 | let consoleWarnSpy: ReturnType<typeof vi.spyOn>;
8 | let consoleLogSpy: ReturnType<typeof vi.spyOn>;
9 | let originalDebug: string | undefined;
10 |
11 | beforeEach(() => {
12 | // Save original DEBUG value and enable debug for logger tests
13 | originalDebug = process.env.DEBUG;
14 | process.env.DEBUG = 'true';
15 |
16 | // Create spies before creating logger
17 | consoleErrorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
18 | consoleWarnSpy = vi.spyOn(console, 'warn').mockImplementation(() => {});
19 | consoleLogSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
20 |
21 | // Create logger after spies and env setup
22 | logger = new Logger({ timestamp: false, prefix: 'test' });
23 | });
24 |
25 | afterEach(() => {
26 | // Restore all mocks first
27 | vi.restoreAllMocks();
28 |
29 | // Restore original DEBUG value with more robust handling
30 | try {
31 | if (originalDebug === undefined) {
32 | // Use Reflect.deleteProperty for safer deletion
33 | Reflect.deleteProperty(process.env, 'DEBUG');
34 | } else {
35 | process.env.DEBUG = originalDebug;
36 | }
37 | } catch (error) {
38 | // If deletion fails, set to empty string as fallback
39 | process.env.DEBUG = '';
40 | }
41 | });
42 |
43 | describe('log levels', () => {
44 | it('should only log errors when level is ERROR', () => {
45 | logger.setLevel(LogLevel.ERROR);
46 |
47 | logger.error('error message');
48 | logger.warn('warn message');
49 | logger.info('info message');
50 | logger.debug('debug message');
51 |
52 | expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
53 | expect(consoleWarnSpy).toHaveBeenCalledTimes(0);
54 | expect(consoleLogSpy).toHaveBeenCalledTimes(0);
55 | });
56 |
57 | it('should log errors and warnings when level is WARN', () => {
58 | logger.setLevel(LogLevel.WARN);
59 |
60 | logger.error('error message');
61 | logger.warn('warn message');
62 | logger.info('info message');
63 | logger.debug('debug message');
64 |
65 | expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
66 | expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
67 | expect(consoleLogSpy).toHaveBeenCalledTimes(0);
68 | });
69 |
70 | it('should log all except debug when level is INFO', () => {
71 | logger.setLevel(LogLevel.INFO);
72 |
73 | logger.error('error message');
74 | logger.warn('warn message');
75 | logger.info('info message');
76 | logger.debug('debug message');
77 |
78 | expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
79 | expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
80 | expect(consoleLogSpy).toHaveBeenCalledTimes(1);
81 | });
82 |
83 | it('should log everything when level is DEBUG', () => {
84 | logger.setLevel(LogLevel.DEBUG);
85 |
86 | logger.error('error message');
87 | logger.warn('warn message');
88 | logger.info('info message');
89 | logger.debug('debug message');
90 |
91 | expect(consoleErrorSpy).toHaveBeenCalledTimes(1);
92 | expect(consoleWarnSpy).toHaveBeenCalledTimes(1);
93 | expect(consoleLogSpy).toHaveBeenCalledTimes(2); // info + debug
94 | });
95 | });
96 |
97 | describe('message formatting', () => {
98 | it('should include prefix in messages', () => {
99 | logger.info('test message');
100 |
101 | expect(consoleLogSpy).toHaveBeenCalledWith('[test] [INFO] test message');
102 | });
103 |
104 | it('should include timestamp when enabled', () => {
105 | // Need to create a new logger instance, but ensure DEBUG is set first
106 | const timestampLogger = new Logger({ timestamp: true, prefix: 'test' });
107 | const dateSpy = vi.spyOn(Date.prototype, 'toISOString').mockReturnValue('2024-01-01T00:00:00.000Z');
108 |
109 | timestampLogger.info('test message');
110 |
111 | expect(consoleLogSpy).toHaveBeenCalledWith('[2024-01-01T00:00:00.000Z] [test] [INFO] test message');
112 |
113 | dateSpy.mockRestore();
114 | });
115 |
116 | it('should pass additional arguments', () => {
117 | const obj = { foo: 'bar' };
118 | logger.info('test message', obj, 123);
119 |
120 | expect(consoleLogSpy).toHaveBeenCalledWith('[test] [INFO] test message', obj, 123);
121 | });
122 | });
123 |
124 | describe('parseLogLevel', () => {
125 | it('should parse log level strings correctly', () => {
126 | expect(Logger.parseLogLevel('error')).toBe(LogLevel.ERROR);
127 | expect(Logger.parseLogLevel('ERROR')).toBe(LogLevel.ERROR);
128 | expect(Logger.parseLogLevel('warn')).toBe(LogLevel.WARN);
129 | expect(Logger.parseLogLevel('info')).toBe(LogLevel.INFO);
130 | expect(Logger.parseLogLevel('debug')).toBe(LogLevel.DEBUG);
131 | expect(Logger.parseLogLevel('unknown')).toBe(LogLevel.INFO);
132 | });
133 | });
134 |
135 | describe('singleton instance', () => {
136 | it('should return the same instance', () => {
137 | const instance1 = Logger.getInstance();
138 | const instance2 = Logger.getInstance();
139 |
140 | expect(instance1).toBe(instance2);
141 | });
142 | });
143 | });
```
--------------------------------------------------------------------------------
/src/utils/template-sanitizer.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { logger } from './logger';
2 |
3 | /**
4 | * Configuration for template sanitization
5 | */
6 | export interface SanitizerConfig {
7 | problematicTokens: string[];
8 | tokenPatterns: RegExp[];
9 | replacements: Map<string, string>;
10 | }
11 |
12 | /**
13 | * Default sanitizer configuration
14 | */
15 | export const defaultSanitizerConfig: SanitizerConfig = {
16 | problematicTokens: [
17 | // Specific tokens can be added here if needed
18 | ],
19 | tokenPatterns: [
20 | /apify_api_[A-Za-z0-9]+/g,
21 | /sk-[A-Za-z0-9]+/g, // OpenAI tokens
22 | /pat[A-Za-z0-9_]{40,}/g, // Airtable Personal Access Tokens
23 | /ghp_[A-Za-z0-9]{36,}/g, // GitHub Personal Access Tokens
24 | /gho_[A-Za-z0-9]{36,}/g, // GitHub OAuth tokens
25 | /Bearer\s+[A-Za-z0-9\-._~+\/]+=*/g // Generic bearer tokens
26 | ],
27 | replacements: new Map([
28 | ['apify_api_', 'apify_api_YOUR_TOKEN_HERE'],
29 | ['sk-', 'sk-YOUR_OPENAI_KEY_HERE'],
30 | ['pat', 'patYOUR_AIRTABLE_TOKEN_HERE'],
31 | ['ghp_', 'ghp_YOUR_GITHUB_TOKEN_HERE'],
32 | ['gho_', 'gho_YOUR_GITHUB_TOKEN_HERE'],
33 | ['Bearer ', 'Bearer YOUR_TOKEN_HERE']
34 | ])
35 | };
36 |
37 | /**
38 | * Template sanitizer for removing API tokens from workflow templates
39 | */
40 | export class TemplateSanitizer {
41 | constructor(private config: SanitizerConfig = defaultSanitizerConfig) {}
42 |
43 | /**
44 | * Add a new problematic token to sanitize
45 | */
46 | addProblematicToken(token: string): void {
47 | if (!this.config.problematicTokens.includes(token)) {
48 | this.config.problematicTokens.push(token);
49 | logger.info(`Added problematic token to sanitizer: ${token.substring(0, 10)}...`);
50 | }
51 | }
52 |
53 | /**
54 | * Add a new token pattern to detect
55 | */
56 | addTokenPattern(pattern: RegExp, replacement: string): void {
57 | this.config.tokenPatterns.push(pattern);
58 | const prefix = pattern.source.match(/^([^[]+)/)?.[1] || '';
59 | if (prefix) {
60 | this.config.replacements.set(prefix, replacement);
61 | }
62 | }
63 |
64 | /**
65 | * Sanitize a workflow object
66 | */
67 | sanitizeWorkflow(workflow: any): { sanitized: any; wasModified: boolean } {
68 | if (!workflow) {
69 | return { sanitized: workflow, wasModified: false };
70 | }
71 |
72 | const original = JSON.stringify(workflow);
73 | let sanitized = this.sanitizeObject(workflow);
74 |
75 | // Remove sensitive workflow data
76 | if (sanitized && sanitized.pinData) {
77 | delete sanitized.pinData;
78 | }
79 | if (sanitized && sanitized.executionId) {
80 | delete sanitized.executionId;
81 | }
82 | if (sanitized && sanitized.staticData) {
83 | delete sanitized.staticData;
84 | }
85 |
86 | const wasModified = JSON.stringify(sanitized) !== original;
87 |
88 | return { sanitized, wasModified };
89 | }
90 |
91 | /**
92 | * Check if a workflow needs sanitization
93 | */
94 | needsSanitization(workflow: any): boolean {
95 | const workflowStr = JSON.stringify(workflow);
96 |
97 | // Check for known problematic tokens
98 | for (const token of this.config.problematicTokens) {
99 | if (workflowStr.includes(token)) {
100 | return true;
101 | }
102 | }
103 |
104 | // Check for token patterns
105 | for (const pattern of this.config.tokenPatterns) {
106 | pattern.lastIndex = 0; // Reset regex state
107 | if (pattern.test(workflowStr)) {
108 | return true;
109 | }
110 | }
111 |
112 | return false;
113 | }
114 |
115 | /**
116 | * Get list of detected tokens in a workflow
117 | */
118 | detectTokens(workflow: any): string[] {
119 | const workflowStr = JSON.stringify(workflow);
120 | const detectedTokens: string[] = [];
121 |
122 | // Check for known problematic tokens
123 | for (const token of this.config.problematicTokens) {
124 | if (workflowStr.includes(token)) {
125 | detectedTokens.push(token);
126 | }
127 | }
128 |
129 | // Check for token patterns
130 | for (const pattern of this.config.tokenPatterns) {
131 | pattern.lastIndex = 0; // Reset regex state
132 | const matches = workflowStr.match(pattern);
133 | if (matches) {
134 | detectedTokens.push(...matches);
135 | }
136 | }
137 |
138 | return [...new Set(detectedTokens)]; // Remove duplicates
139 | }
140 |
141 | private sanitizeObject(obj: any): any {
142 | if (typeof obj === 'string') {
143 | return this.replaceTokens(obj);
144 | } else if (Array.isArray(obj)) {
145 | return obj.map(item => this.sanitizeObject(item));
146 | } else if (obj && typeof obj === 'object') {
147 | const result: any = {};
148 | for (const key in obj) {
149 | result[key] = this.sanitizeObject(obj[key]);
150 | }
151 | return result;
152 | }
153 | return obj;
154 | }
155 |
156 | private replaceTokens(str: string): string {
157 | let result = str;
158 |
159 | // Replace known problematic tokens
160 | this.config.problematicTokens.forEach(token => {
161 | result = result.replace(new RegExp(token, 'g'), 'YOUR_API_TOKEN_HERE');
162 | });
163 |
164 | // Replace pattern-matched tokens
165 | this.config.tokenPatterns.forEach(pattern => {
166 | result = result.replace(pattern, (match) => {
167 | // Find the best replacement based on prefix
168 | for (const [prefix, replacement] of this.config.replacements) {
169 | if (match.startsWith(prefix)) {
170 | return replacement;
171 | }
172 | }
173 | return 'YOUR_TOKEN_HERE';
174 | });
175 | });
176 |
177 | return result;
178 | }
179 | }
```
--------------------------------------------------------------------------------
/tests/unit/telemetry/rate-limiter.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect, beforeEach, vi } from 'vitest';
2 | import { TelemetryRateLimiter } from '../../../src/telemetry/rate-limiter';
3 |
4 | describe('TelemetryRateLimiter', () => {
5 | let rateLimiter: TelemetryRateLimiter;
6 |
7 | beforeEach(() => {
8 | vi.useFakeTimers();
9 | rateLimiter = new TelemetryRateLimiter(1000, 5); // 5 events per second
10 | vi.clearAllMocks();
11 | });
12 |
13 | afterEach(() => {
14 | vi.useRealTimers();
15 | });
16 |
17 | describe('allow()', () => {
18 | it('should allow events within the limit', () => {
19 | for (let i = 0; i < 5; i++) {
20 | expect(rateLimiter.allow()).toBe(true);
21 | }
22 | });
23 |
24 | it('should block events exceeding the limit', () => {
25 | // Fill up the limit
26 | for (let i = 0; i < 5; i++) {
27 | expect(rateLimiter.allow()).toBe(true);
28 | }
29 |
30 | // Next event should be blocked
31 | expect(rateLimiter.allow()).toBe(false);
32 | });
33 |
34 | it('should allow events again after the window expires', () => {
35 | // Fill up the limit
36 | for (let i = 0; i < 5; i++) {
37 | rateLimiter.allow();
38 | }
39 |
40 | // Should be blocked
41 | expect(rateLimiter.allow()).toBe(false);
42 |
43 | // Advance time to expire the window
44 | vi.advanceTimersByTime(1100);
45 |
46 | // Should allow events again
47 | expect(rateLimiter.allow()).toBe(true);
48 | });
49 | });
50 |
51 | describe('wouldAllow()', () => {
52 | it('should check without modifying state', () => {
53 | // Fill up 4 of 5 allowed
54 | for (let i = 0; i < 4; i++) {
55 | rateLimiter.allow();
56 | }
57 |
58 | // Check multiple times - should always return true
59 | expect(rateLimiter.wouldAllow()).toBe(true);
60 | expect(rateLimiter.wouldAllow()).toBe(true);
61 |
62 | // Actually use the last slot
63 | expect(rateLimiter.allow()).toBe(true);
64 |
65 | // Now should return false
66 | expect(rateLimiter.wouldAllow()).toBe(false);
67 | });
68 | });
69 |
70 | describe('getStats()', () => {
71 | it('should return accurate statistics', () => {
72 | // Use 3 of 5 allowed
73 | for (let i = 0; i < 3; i++) {
74 | rateLimiter.allow();
75 | }
76 |
77 | const stats = rateLimiter.getStats();
78 | expect(stats.currentEvents).toBe(3);
79 | expect(stats.maxEvents).toBe(5);
80 | expect(stats.windowMs).toBe(1000);
81 | expect(stats.utilizationPercent).toBe(60);
82 | expect(stats.remainingCapacity).toBe(2);
83 | });
84 |
85 | it('should track dropped events', () => {
86 | // Fill up the limit
87 | for (let i = 0; i < 5; i++) {
88 | rateLimiter.allow();
89 | }
90 |
91 | // Try to add more - should be dropped
92 | rateLimiter.allow();
93 | rateLimiter.allow();
94 |
95 | const stats = rateLimiter.getStats();
96 | expect(stats.droppedEvents).toBe(2);
97 | });
98 | });
99 |
100 | describe('getTimeUntilCapacity()', () => {
101 | it('should return 0 when capacity is available', () => {
102 | expect(rateLimiter.getTimeUntilCapacity()).toBe(0);
103 | });
104 |
105 | it('should return time until capacity when at limit', () => {
106 | // Fill up the limit
107 | for (let i = 0; i < 5; i++) {
108 | rateLimiter.allow();
109 | }
110 |
111 | const timeUntilCapacity = rateLimiter.getTimeUntilCapacity();
112 | expect(timeUntilCapacity).toBeGreaterThan(0);
113 | expect(timeUntilCapacity).toBeLessThanOrEqual(1000);
114 | });
115 | });
116 |
117 | describe('updateLimits()', () => {
118 | it('should dynamically update rate limits', () => {
119 | // Update to allow 10 events per 2 seconds
120 | rateLimiter.updateLimits(2000, 10);
121 |
122 | // Should allow 10 events
123 | for (let i = 0; i < 10; i++) {
124 | expect(rateLimiter.allow()).toBe(true);
125 | }
126 |
127 | // 11th should be blocked
128 | expect(rateLimiter.allow()).toBe(false);
129 |
130 | const stats = rateLimiter.getStats();
131 | expect(stats.maxEvents).toBe(10);
132 | expect(stats.windowMs).toBe(2000);
133 | });
134 | });
135 |
136 | describe('reset()', () => {
137 | it('should clear all state', () => {
138 | // Use some events and drop some
139 | for (let i = 0; i < 7; i++) {
140 | rateLimiter.allow();
141 | }
142 |
143 | // Reset
144 | rateLimiter.reset();
145 |
146 | const stats = rateLimiter.getStats();
147 | expect(stats.currentEvents).toBe(0);
148 | expect(stats.droppedEvents).toBe(0);
149 |
150 | // Should allow events again
151 | expect(rateLimiter.allow()).toBe(true);
152 | });
153 | });
154 |
155 | describe('sliding window behavior', () => {
156 | it('should correctly implement sliding window', () => {
157 | const timestamps: number[] = [];
158 |
159 | // Add events at different times
160 | for (let i = 0; i < 3; i++) {
161 | expect(rateLimiter.allow()).toBe(true);
162 | timestamps.push(Date.now());
163 | vi.advanceTimersByTime(300);
164 | }
165 |
166 | // Should still have capacity (3 events used, 2 slots remaining)
167 | expect(rateLimiter.allow()).toBe(true);
168 | expect(rateLimiter.allow()).toBe(true);
169 |
170 | // Should be at limit (5 events used)
171 | expect(rateLimiter.allow()).toBe(false);
172 |
173 | // Advance time for first event to expire
174 | vi.advanceTimersByTime(200);
175 |
176 | // Should have capacity again as first event is outside window
177 | expect(rateLimiter.allow()).toBe(true);
178 | });
179 | });
180 | });
```
--------------------------------------------------------------------------------
/scripts/test-multi-tenant-simple.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env ts-node
2 |
3 | /**
4 | * Simple test for multi-tenant functionality
5 | * Tests that tools are registered correctly based on configuration
6 | */
7 |
8 | import { isN8nApiConfigured } from '../src/config/n8n-api';
9 | import { InstanceContext } from '../src/types/instance-context';
10 | import dotenv from 'dotenv';
11 |
12 | dotenv.config();
13 |
14 | async function testMultiTenant() {
15 | console.log('🧪 Testing Multi-Tenant Tool Registration\n');
16 | console.log('=' .repeat(60));
17 |
18 | // Save original environment
19 | const originalEnv = {
20 | ENABLE_MULTI_TENANT: process.env.ENABLE_MULTI_TENANT,
21 | N8N_API_URL: process.env.N8N_API_URL,
22 | N8N_API_KEY: process.env.N8N_API_KEY
23 | };
24 |
25 | try {
26 | // Test 1: Default - no API config
27 | console.log('\n✅ Test 1: No API configuration');
28 | delete process.env.N8N_API_URL;
29 | delete process.env.N8N_API_KEY;
30 | delete process.env.ENABLE_MULTI_TENANT;
31 |
32 | const hasConfig1 = isN8nApiConfigured();
33 | console.log(` Environment API configured: ${hasConfig1}`);
34 | console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
35 | console.log(` Should show tools: ${hasConfig1 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
36 |
37 | // Test 2: Multi-tenant enabled
38 | console.log('\n✅ Test 2: Multi-tenant enabled (no env API)');
39 | process.env.ENABLE_MULTI_TENANT = 'true';
40 |
41 | const hasConfig2 = isN8nApiConfigured();
42 | console.log(` Environment API configured: ${hasConfig2}`);
43 | console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
44 | console.log(` Should show tools: ${hasConfig2 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
45 |
46 | // Test 3: Environment variables set
47 | console.log('\n✅ Test 3: Environment variables set');
48 | process.env.ENABLE_MULTI_TENANT = 'false';
49 | process.env.N8N_API_URL = 'https://test.n8n.cloud';
50 | process.env.N8N_API_KEY = 'test-key';
51 |
52 | const hasConfig3 = isN8nApiConfigured();
53 | console.log(` Environment API configured: ${hasConfig3}`);
54 | console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
55 | console.log(` Should show tools: ${hasConfig3 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
56 |
57 | // Test 4: Instance context simulation
58 | console.log('\n✅ Test 4: Instance context (simulated)');
59 | const instanceContext: InstanceContext = {
60 | n8nApiUrl: 'https://instance.n8n.cloud',
61 | n8nApiKey: 'instance-key',
62 | instanceId: 'test-instance'
63 | };
64 |
65 | const hasInstanceConfig = !!(instanceContext.n8nApiUrl && instanceContext.n8nApiKey);
66 | console.log(` Instance has API config: ${hasInstanceConfig}`);
67 | console.log(` Environment API configured: ${hasConfig3}`);
68 | console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
69 | console.log(` Should show tools: ${hasConfig3 || hasInstanceConfig || process.env.ENABLE_MULTI_TENANT === 'true'}`);
70 |
71 | // Test 5: Multi-tenant with instance strategy
72 | console.log('\n✅ Test 5: Multi-tenant with instance strategy');
73 | process.env.ENABLE_MULTI_TENANT = 'true';
74 | process.env.MULTI_TENANT_SESSION_STRATEGY = 'instance';
75 | delete process.env.N8N_API_URL;
76 | delete process.env.N8N_API_KEY;
77 |
78 | const hasConfig5 = isN8nApiConfigured();
79 | const sessionStrategy = process.env.MULTI_TENANT_SESSION_STRATEGY || 'instance';
80 | console.log(` Environment API configured: ${hasConfig5}`);
81 | console.log(` Multi-tenant enabled: ${process.env.ENABLE_MULTI_TENANT === 'true'}`);
82 | console.log(` Session strategy: ${sessionStrategy}`);
83 | console.log(` Should show tools: ${hasConfig5 || process.env.ENABLE_MULTI_TENANT === 'true'}`);
84 |
85 | if (instanceContext.instanceId) {
86 | const sessionId = `instance-${instanceContext.instanceId}-uuid`;
87 | console.log(` Session ID format: ${sessionId}`);
88 | }
89 |
90 | console.log('\n' + '=' .repeat(60));
91 | console.log('✅ All configuration tests passed!');
92 | console.log('\n📝 Summary:');
93 | console.log(' - Tools are shown when: env API configured OR multi-tenant enabled OR instance context provided');
94 | console.log(' - Session isolation works with instance-based session IDs in multi-tenant mode');
95 | console.log(' - Backward compatibility maintained for env-based configuration');
96 |
97 | } catch (error) {
98 | console.error('\n❌ Test failed:', error);
99 | process.exit(1);
100 | } finally {
101 | // Restore original environment
102 | if (originalEnv.ENABLE_MULTI_TENANT !== undefined) {
103 | process.env.ENABLE_MULTI_TENANT = originalEnv.ENABLE_MULTI_TENANT;
104 | } else {
105 | delete process.env.ENABLE_MULTI_TENANT;
106 | }
107 |
108 | if (originalEnv.N8N_API_URL !== undefined) {
109 | process.env.N8N_API_URL = originalEnv.N8N_API_URL;
110 | } else {
111 | delete process.env.N8N_API_URL;
112 | }
113 |
114 | if (originalEnv.N8N_API_KEY !== undefined) {
115 | process.env.N8N_API_KEY = originalEnv.N8N_API_KEY;
116 | } else {
117 | delete process.env.N8N_API_KEY;
118 | }
119 | }
120 | }
121 |
122 | // Run tests
123 | testMultiTenant().catch(error => {
124 | console.error('Test execution failed:', error);
125 | process.exit(1);
126 | });
```
--------------------------------------------------------------------------------
/scripts/test-code-node-fixes.ts:
--------------------------------------------------------------------------------
```typescript
1 | #!/usr/bin/env ts-node
2 |
3 | /**
4 | * Test script to verify Code node documentation fixes
5 | */
6 |
7 | import { createDatabaseAdapter } from '../src/database/database-adapter';
8 | import { NodeDocumentationService } from '../src/services/node-documentation-service';
9 | import { getToolDocumentation } from '../src/mcp/tools-documentation';
10 | import { ExampleGenerator } from '../src/services/example-generator';
11 | import { EnhancedConfigValidator } from '../src/services/enhanced-config-validator';
12 |
13 | const dbPath = process.env.NODE_DB_PATH || './data/nodes.db';
14 |
15 | async function main() {
16 | console.log('🧪 Testing Code Node Documentation Fixes\n');
17 |
18 | const db = await createDatabaseAdapter(dbPath);
19 | const service = new NodeDocumentationService(dbPath);
20 |
21 | // Test 1: Check JMESPath documentation
22 | console.log('1️⃣ Testing JMESPath Documentation Fix');
23 | console.log('=====================================');
24 | const codeNodeGuide = getToolDocumentation('code_node_guide', 'full');
25 |
26 | // Check for correct JMESPath syntax
27 | if (codeNodeGuide.includes('$jmespath(') && !codeNodeGuide.includes('jmespath.search(')) {
28 | console.log('✅ JMESPath documentation correctly shows $jmespath() syntax');
29 | } else {
30 | console.log('❌ JMESPath documentation still shows incorrect syntax');
31 | }
32 |
33 | // Check for Python JMESPath
34 | if (codeNodeGuide.includes('_jmespath(')) {
35 | console.log('✅ Python JMESPath with underscore prefix documented');
36 | } else {
37 | console.log('❌ Python JMESPath not properly documented');
38 | }
39 |
40 | // Test 2: Check $node documentation
41 | console.log('\n2️⃣ Testing $node Documentation Fix');
42 | console.log('===================================');
43 |
44 | if (codeNodeGuide.includes("$('Previous Node')") && !codeNodeGuide.includes('$node.name')) {
45 | console.log('✅ Node access correctly shows $("Node Name") syntax');
46 | } else {
47 | console.log('❌ Node access documentation still incorrect');
48 | }
49 |
50 | // Test 3: Check Python item.json documentation
51 | console.log('\n3️⃣ Testing Python item.json Documentation Fix');
52 | console.log('==============================================');
53 |
54 | if (codeNodeGuide.includes('item.json.to_py()') && codeNodeGuide.includes('JsProxy')) {
55 | console.log('✅ Python item.json correctly documented with to_py() method');
56 | } else {
57 | console.log('❌ Python item.json documentation incomplete');
58 | }
59 |
60 | // Test 4: Check Python examples
61 | console.log('\n4️⃣ Testing Python Examples');
62 | console.log('===========================');
63 |
64 | const pythonExample = ExampleGenerator.getExamples('nodes-base.code.pythonExample');
65 | if (pythonExample?.minimal?.pythonCode?.includes('_input.all()') &&
66 | pythonExample?.minimal?.pythonCode?.includes('to_py()')) {
67 | console.log('✅ Python examples use correct _input.all() and to_py()');
68 | } else {
69 | console.log('❌ Python examples not updated correctly');
70 | }
71 |
72 | // Test 5: Validate Code node without visibility warnings
73 | console.log('\n5️⃣ Testing Code Node Validation (No Visibility Warnings)');
74 | console.log('=========================================================');
75 |
76 | const codeNodeInfo = await service.getNodeInfo('n8n-nodes-base.code');
77 | if (!codeNodeInfo) {
78 | console.log('❌ Could not find Code node info');
79 | return;
80 | }
81 |
82 | const testConfig = {
83 | language: 'javaScript',
84 | jsCode: 'return items.map(item => ({json: {...item.json, processed: true}}))',
85 | mode: 'runOnceForAllItems',
86 | onError: 'continueRegularOutput'
87 | };
88 |
89 | const nodeProperties = (codeNodeInfo as any).properties || [];
90 | const validationResult = EnhancedConfigValidator.validateWithMode(
91 | 'nodes-base.code',
92 | testConfig,
93 | nodeProperties,
94 | 'full',
95 | 'ai-friendly'
96 | );
97 |
98 | // Check if there are any visibility warnings
99 | const visibilityWarnings = validationResult.warnings.filter(w =>
100 | w.message.includes("won't be used due to current settings")
101 | );
102 |
103 | if (visibilityWarnings.length === 0) {
104 | console.log('✅ No false positive visibility warnings for Code node');
105 | } else {
106 | console.log(`❌ Still getting ${visibilityWarnings.length} visibility warnings:`);
107 | visibilityWarnings.forEach(w => console.log(` - ${w.property}: ${w.message}`));
108 | }
109 |
110 | // Test 6: Check Python underscore variables in documentation
111 | console.log('\n6️⃣ Testing Python Underscore Variables');
112 | console.log('========================================');
113 |
114 | const pythonVarsDocumented = codeNodeGuide.includes('Variables use underscore prefix') &&
115 | codeNodeGuide.includes('_input') &&
116 | codeNodeGuide.includes('_json') &&
117 | codeNodeGuide.includes('_jmespath');
118 |
119 | if (pythonVarsDocumented) {
120 | console.log('✅ Python underscore variables properly documented');
121 | } else {
122 | console.log('❌ Python underscore variables not fully documented');
123 | }
124 |
125 | // Summary
126 | console.log('\n📊 Test Summary');
127 | console.log('===============');
128 | console.log('All critical documentation fixes have been verified!');
129 |
130 | db.close();
131 | }
132 |
133 | main().catch(console.error);
```
--------------------------------------------------------------------------------
/src/mcp-engine.ts:
--------------------------------------------------------------------------------
```typescript
1 | /**
2 | * N8N MCP Engine - Clean interface for service integration
3 | *
4 | * This class provides a simple API for integrating the n8n-MCP server
5 | * into larger services. The wrapping service handles authentication,
6 | * multi-tenancy, rate limiting, etc.
7 | */
8 | import { Request, Response } from 'express';
9 | import { SingleSessionHTTPServer } from './http-server-single-session';
10 | import { logger } from './utils/logger';
11 | import { InstanceContext } from './types/instance-context';
12 |
13 | export interface EngineHealth {
14 | status: 'healthy' | 'unhealthy';
15 | uptime: number;
16 | sessionActive: boolean;
17 | memoryUsage: {
18 | used: number;
19 | total: number;
20 | unit: string;
21 | };
22 | version: string;
23 | }
24 |
25 | export interface EngineOptions {
26 | sessionTimeout?: number;
27 | logLevel?: 'error' | 'warn' | 'info' | 'debug';
28 | }
29 |
30 | export class N8NMCPEngine {
31 | private server: SingleSessionHTTPServer;
32 | private startTime: Date;
33 |
34 | constructor(options: EngineOptions = {}) {
35 | this.server = new SingleSessionHTTPServer();
36 | this.startTime = new Date();
37 |
38 | if (options.logLevel) {
39 | process.env.LOG_LEVEL = options.logLevel;
40 | }
41 | }
42 |
43 | /**
44 | * Process a single MCP request with optional instance context
45 | * The wrapping service handles authentication, multi-tenancy, etc.
46 | *
47 | * @param req - Express request object
48 | * @param res - Express response object
49 | * @param instanceContext - Optional instance-specific configuration
50 | *
51 | * @example
52 | * // Basic usage (backward compatible)
53 | * await engine.processRequest(req, res);
54 | *
55 | * @example
56 | * // With instance context
57 | * const context: InstanceContext = {
58 | * n8nApiUrl: 'https://instance1.n8n.cloud',
59 | * n8nApiKey: 'instance1-key',
60 | * instanceId: 'tenant-123'
61 | * };
62 | * await engine.processRequest(req, res, context);
63 | */
64 | async processRequest(
65 | req: Request,
66 | res: Response,
67 | instanceContext?: InstanceContext
68 | ): Promise<void> {
69 | try {
70 | await this.server.handleRequest(req, res, instanceContext);
71 | } catch (error) {
72 | logger.error('Engine processRequest error:', error);
73 | throw error;
74 | }
75 | }
76 |
77 | /**
78 | * Health check for service monitoring
79 | *
80 | * @example
81 | * app.get('/health', async (req, res) => {
82 | * const health = await engine.healthCheck();
83 | * res.status(health.status === 'healthy' ? 200 : 503).json(health);
84 | * });
85 | */
86 | async healthCheck(): Promise<EngineHealth> {
87 | try {
88 | const sessionInfo = this.server.getSessionInfo();
89 | const memoryUsage = process.memoryUsage();
90 |
91 | return {
92 | status: 'healthy',
93 | uptime: Math.floor((Date.now() - this.startTime.getTime()) / 1000),
94 | sessionActive: sessionInfo.active,
95 | memoryUsage: {
96 | used: Math.round(memoryUsage.heapUsed / 1024 / 1024),
97 | total: Math.round(memoryUsage.heapTotal / 1024 / 1024),
98 | unit: 'MB'
99 | },
100 | version: '2.3.2'
101 | };
102 | } catch (error) {
103 | logger.error('Health check failed:', error);
104 | return {
105 | status: 'unhealthy',
106 | uptime: 0,
107 | sessionActive: false,
108 | memoryUsage: { used: 0, total: 0, unit: 'MB' },
109 | version: '2.3.2'
110 | };
111 | }
112 | }
113 |
114 | /**
115 | * Get current session information
116 | * Useful for monitoring and debugging
117 | */
118 | getSessionInfo(): { active: boolean; sessionId?: string; age?: number } {
119 | return this.server.getSessionInfo();
120 | }
121 |
122 | /**
123 | * Graceful shutdown for service lifecycle
124 | *
125 | * @example
126 | * process.on('SIGTERM', async () => {
127 | * await engine.shutdown();
128 | * process.exit(0);
129 | * });
130 | */
131 | async shutdown(): Promise<void> {
132 | logger.info('Shutting down N8N MCP Engine...');
133 | await this.server.shutdown();
134 | }
135 |
136 | /**
137 | * Start the engine (if using standalone mode)
138 | * For embedded use, this is not necessary
139 | */
140 | async start(): Promise<void> {
141 | await this.server.start();
142 | }
143 | }
144 |
145 | /**
146 | * Example usage with flexible instance configuration:
147 | *
148 | * ```typescript
149 | * import { N8NMCPEngine, InstanceContext } from 'n8n-mcp';
150 | * import express from 'express';
151 | *
152 | * const app = express();
153 | * const engine = new N8NMCPEngine();
154 | *
155 | * // Middleware for authentication
156 | * const authenticate = (req, res, next) => {
157 | * // Your auth logic
158 | * req.userId = 'user123';
159 | * next();
160 | * };
161 | *
162 | * // MCP endpoint with flexible instance support
163 | * app.post('/api/instances/:instanceId/mcp', authenticate, async (req, res) => {
164 | * // Get instance configuration from your database
165 | * const instance = await getInstanceConfig(req.params.instanceId);
166 | *
167 | * // Create instance context
168 | * const context: InstanceContext = {
169 | * n8nApiUrl: instance.n8nUrl,
170 | * n8nApiKey: instance.apiKey,
171 | * instanceId: instance.id,
172 | * metadata: { userId: req.userId }
173 | * };
174 | *
175 | * // Process request with instance context
176 | * await engine.processRequest(req, res, context);
177 | * });
178 | *
179 | * // Health endpoint
180 | * app.get('/health', async (req, res) => {
181 | * const health = await engine.healthCheck();
182 | * res.json(health);
183 | * });
184 | * ```
185 | */
186 | export default N8NMCPEngine;
```
--------------------------------------------------------------------------------
/tests/bridge.test.ts:
--------------------------------------------------------------------------------
```typescript
1 | import { describe, it, expect } from 'vitest';
2 | import { N8NMCPBridge } from '../src/utils/bridge';
3 |
4 | describe('N8NMCPBridge', () => {
5 | describe('n8nToMCPToolArgs', () => {
6 | it('should extract json from n8n data object', () => {
7 | const n8nData = { json: { foo: 'bar' } };
8 | const result = N8NMCPBridge.n8nToMCPToolArgs(n8nData);
9 | expect(result).toEqual({ foo: 'bar' });
10 | });
11 |
12 | it('should remove n8n metadata', () => {
13 | const n8nData = { foo: 'bar', pairedItem: 0 };
14 | const result = N8NMCPBridge.n8nToMCPToolArgs(n8nData);
15 | expect(result).toEqual({ foo: 'bar' });
16 | });
17 | });
18 |
19 | describe('mcpToN8NExecutionData', () => {
20 | it('should convert MCP content array to n8n format', () => {
21 | const mcpResponse = {
22 | content: [{ type: 'text', text: '{"result": "success"}' }],
23 | };
24 | const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse, 1);
25 | expect(result).toEqual({
26 | json: { result: 'success' },
27 | pairedItem: 1,
28 | });
29 | });
30 |
31 | it('should handle non-JSON text content', () => {
32 | const mcpResponse = {
33 | content: [{ type: 'text', text: 'plain text response' }],
34 | };
35 | const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse);
36 | expect(result).toEqual({
37 | json: { result: 'plain text response' },
38 | pairedItem: 0,
39 | });
40 | });
41 |
42 | it('should handle direct object response', () => {
43 | const mcpResponse = { foo: 'bar' };
44 | const result = N8NMCPBridge.mcpToN8NExecutionData(mcpResponse);
45 | expect(result).toEqual({
46 | json: { foo: 'bar' },
47 | pairedItem: 0,
48 | });
49 | });
50 | });
51 |
52 | describe('n8nWorkflowToMCP', () => {
53 | it('should convert n8n workflow to MCP format', () => {
54 | const n8nWorkflow = {
55 | id: '123',
56 | name: 'Test Workflow',
57 | nodes: [
58 | {
59 | id: 'node1',
60 | type: 'n8n-nodes-base.start',
61 | name: 'Start',
62 | parameters: {},
63 | position: [100, 100],
64 | },
65 | ],
66 | connections: {},
67 | settings: { executionOrder: 'v1' },
68 | active: true,
69 | createdAt: '2024-01-01T00:00:00Z',
70 | updatedAt: '2024-01-02T00:00:00Z',
71 | };
72 |
73 | const result = N8NMCPBridge.n8nWorkflowToMCP(n8nWorkflow);
74 |
75 | expect(result).toEqual({
76 | id: '123',
77 | name: 'Test Workflow',
78 | description: '',
79 | nodes: [
80 | {
81 | id: 'node1',
82 | type: 'n8n-nodes-base.start',
83 | name: 'Start',
84 | parameters: {},
85 | position: [100, 100],
86 | },
87 | ],
88 | connections: {},
89 | settings: { executionOrder: 'v1' },
90 | metadata: {
91 | createdAt: '2024-01-01T00:00:00Z',
92 | updatedAt: '2024-01-02T00:00:00Z',
93 | active: true,
94 | },
95 | });
96 | });
97 | });
98 |
99 | describe('mcpToN8NWorkflow', () => {
100 | it('should convert MCP workflow to n8n format', () => {
101 | const mcpWorkflow = {
102 | name: 'Test Workflow',
103 | nodes: [{ id: 'node1', type: 'n8n-nodes-base.start' }],
104 | connections: { node1: { main: [[]] } },
105 | };
106 |
107 | const result = N8NMCPBridge.mcpToN8NWorkflow(mcpWorkflow);
108 |
109 | expect(result).toEqual({
110 | name: 'Test Workflow',
111 | nodes: [{ id: 'node1', type: 'n8n-nodes-base.start' }],
112 | connections: { node1: { main: [[]] } },
113 | settings: { executionOrder: 'v1' },
114 | staticData: null,
115 | pinData: {},
116 | });
117 | });
118 | });
119 |
120 | describe('sanitizeData', () => {
121 | it('should handle null and undefined', () => {
122 | expect(N8NMCPBridge.sanitizeData(null)).toEqual({});
123 | expect(N8NMCPBridge.sanitizeData(undefined)).toEqual({});
124 | });
125 |
126 | it('should wrap non-objects', () => {
127 | expect(N8NMCPBridge.sanitizeData('string')).toEqual({ value: 'string' });
128 | expect(N8NMCPBridge.sanitizeData(123)).toEqual({ value: 123 });
129 | });
130 |
131 | it('should handle circular references', () => {
132 | const obj: any = { a: 1 };
133 | obj.circular = obj;
134 |
135 | const result = N8NMCPBridge.sanitizeData(obj);
136 | expect(result).toEqual({ a: 1, circular: '[Circular]' });
137 | });
138 | });
139 |
140 | describe('formatError', () => {
141 | it('should format standard errors', () => {
142 | const error = new Error('Test error');
143 | error.stack = 'stack trace';
144 |
145 | const result = N8NMCPBridge.formatError(error);
146 |
147 | expect(result).toEqual({
148 | message: 'Test error',
149 | type: 'Error',
150 | stack: 'stack trace',
151 | details: {
152 | code: undefined,
153 | statusCode: undefined,
154 | data: undefined,
155 | },
156 | });
157 | });
158 |
159 | it('should include additional error properties', () => {
160 | const error: any = new Error('API error');
161 | error.code = 'ERR_API';
162 | error.statusCode = 404;
163 | error.data = { field: 'value' };
164 |
165 | const result = N8NMCPBridge.formatError(error);
166 |
167 | expect(result.details).toEqual({
168 | code: 'ERR_API',
169 | statusCode: 404,
170 | data: { field: 'value' },
171 | });
172 | });
173 | });
174 | });
```