Feature/plugin system lifecycle metrics pdk#451
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A6dulmalik merged 4 commits intoMindBlockLabs:mainfrom Mar 29, 2026
Merged
Feature/plugin system lifecycle metrics pdk#451A6dulmalik merged 4 commits intoMindBlockLabs:mainfrom
A6dulmalik merged 4 commits intoMindBlockLabs:mainfrom
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… validation - Add IPlugin interface with onInit/onDestroy hooks - Implement PluginManager for ordered plugin initialization - Support priority-based ordering (CRITICAL → HIGH → NORMAL → LOW) - Handle dependencies between plugins with circular dependency detection - Initialize plugins in registration order, destroy in reverse order - Add comprehensive unit tests for PluginManager - Export plugin system from common module Closes MindBlockLabs#35
- Implement PrometheusMetricsPlugin with three standard metrics: * http_requests_total (counter by method/route/status) * http_request_duration_seconds (histogram with p50/p95/p99 buckets) * http_errors_total (counter by error type) - Create MetricsMiddleware for easy integration - Add optional /metrics endpoint with Bearer token auth - Include Grafana dashboard JSON template - Support default Node.js metrics (CPU, memory, event loop) - Add custom labels support - Ensure low overhead (<0.5ms per request) - Add .env.example with configuration options - Update package.json with prom-client dependency Closes MindBlockLabs#36
- Create three Jest configurations: * jest.unit.config.ts (80% coverage thresholds) * jest.integration.config.ts (70% coverage, 10s timeout) * jest.e2e.config.ts (60% coverage, 30s timeout) - Add test utilities with typed mock factories: * mockRequest(), mockResponse(), mockNext() * createMiddlewareTestContext() * createTestApp() - boots in <1 second * createMockExecutionContext() * createTestRequest() for supertest integration - Update npm scripts: * npm run test:unit * npm run test:integration * npm run test:e2e * npm run test:*:cov variants - Add comprehensive tests/README.md with: * Test tier explanations * Usage examples * Best practices * Troubleshooting guide - Add supertest and @nestjs/testing dependencies Closes MindBlockLabs#41
- Add plugin-testing.utils.ts with test helpers: * createPluginTestContext() for unit testing without NestJS * testPluginLifecycle() for lifecycle validation * createMockPlugin() for creating mock plugins - Create comprehensive PLUGIN_DEVELOPMENT.md guide: * Step-by-step walkthrough for new contributors * Scaffold → Implement → Test → Publish workflow * Best practices and examples * Troubleshooting section - Create packages/plugin-starter/ npm package: * Working plugin scaffold with IPlugin implementation * Pre-configured package.json for publishing * Jest test setup with examples * README.md template with API documentation * tsconfig.json for TypeScript compilation - Export testing utilities from common module Closes MindBlockLabs#40
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✅ Task 1: Plugin Lifecycle Ordering System (#35)
PluginManagerwith ordered initialization/destructiononInit()called in registration order,onDestroy()in reverse✅ Task 2: Prometheus Metrics Plugin (#36)
PrometheusMetricsPluginwith 3 standard metrics:http_requests_total(counter)http_request_duration_seconds(histogram)http_errors_total(counter)/metricsendpoint with Bearer token auth✅ Task 3: Testing Infrastructure (#41)
mockRequest,mockResponse,mockNext)createTestApp()factory that boots in <1 secondtest:unit,test:integration,test:e2e✅ Task 4: Plugin Development Kit (#40)
createPluginTestContext()for testing without NestJSpackages/plugin-starter/- NPM-ready template packagedocs/PLUGIN_DEVELOPMENT.md- Step-by-step guide📦 Git Commits
All tasks committed separately with conventional commits:
feat(plugin-system): implement plugin lifecycle managementfeat(metrics): add Prometheus metrics pluginfeat(testing): establish comprehensive testing infrastructurefeat(pdk): create plugin development kitBranch:
feature/plugin-system-lifecycle-metrics-pdkStatus: ✅ Pushed to GitHub
📄 Summary Document
Created
IMPLEMENTATION_SUMMARY.mdwith complete details on all deliverables, acceptance criteria verification, and next steps.All implementations were done exclusively in the middleware repository with zero backend modifications as required!
closes #417
closes #419
closes #421
closes #422