8 plugins from public Claude Code marketplaces. Each one bundles skills, slash commands, agents, hooks or MCP servers that install together.
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Background job and queue testing for Sidekiq, Celery, BullMQ, SQS, RabbitMQ and Kafka consumers, plus cron schedules and idempotency guarantees. A read-only critic agent (async-job-health-critic) flags missing retry limits, absent dead-letter routing, and other at-least-once reliability defects in queue and worker code.
backend-distributedDatabase migration testing for Flyway, Liquibase and Atlas: classify every schema change by risk and review blast radius and locking before it ships. Sorts DDL and DML into an eight-category operation taxonomy. A review agent (migration-blast-radius-reviewer) covers blast radius plus DDL performance: CONCURRENTLY index builds, ACCESS EXCLUSIVE rewrites, post-migration ANALYZE, and lock-time estimates.
backend-distributedDistributed tracing tests with OpenTelemetry: assert span names, attributes, parent links and status, and query Jaeger, Zipkin or Tempo in CI. Validates OpenTelemetry Collector pipelines and writes per-feature trace specs. A review agent (trace-coverage-reviewer) finds untraced critical paths and spans missing semantic-convention attributes.
backend-distributedConcurrency testing: deterministic race-condition tests, deadlock detection, async ordering checks, and database MVCC isolation-level tests. Includes ThreadSanitizer and the Go race detector with goleak, plus a critic agent (concurrency-critic) that flags unguarded shared state and lock-ordering risks. Code-level races, distinct from qa-resilience (infrastructure fault injection).
backend-distributedCache testing across browser, CDN, proxy, application and data-store layers: Redis, CDN purges, Varnish VTC tests, and cache-key collision audits. Covers RFC 9111 HTTP caching, Cloudflare / Fastly / CloudFront purge APIs, browser Cache-Control tests, and cache-coherence patterns with stampede and stale-while-revalidate references. A detector agent (cache-key-collision-detector) finds keys missing a tenant, user or locale discriminator.
backend-distributedServerless testing for AWS Lambda, Azure Functions and Cloudflare Workers: local emulators, cold-start and timeout budgets, and integration test suites. Builds integration tests from SAM, Serverless Framework, Wrangler, Vercel or Netlify definitions and covers .NET Lambda test tools. A critic agent (serverless-cold-start-critic) flags cold-start anti-patterns.
backend-distributedSaga, CQRS and event sourcing tests: compensating actions, the transactional outbox, replay determinism, and projection consistency windows. A critic agent (saga-critic) flags missing compensating transactions and other distributed-transaction defects.
backend-distributedTime and timezone testing: fake clocks across runtimes, DST transitions, leap seconds, and timezone test matrices built from a codebase's date handling. Fake clocks cover freezegun, Jest and Sinon fake timers, timecop, java.time.Clock, .NET TimeProvider and libfaketime. A critic agent (time-handling-critic) flags naive now() calls and DST-unsafe arithmetic.
backend-distributed