Testing

(🥑) Expert guide for authoring, building, testing, and publishing technical articles to ricc.rocks and Medium.

Portable visual skill pack for the Agent Skills ecosystem (Claude Code, Claude Desktop, Claude Cowork, Claude Design, Goose, Cursor, Codex).

Synchronize a local or WSL clone with its upstream branch and verify backend runtime prerequisites for this project.

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes

Design and analyze A/B tests: sample size, test duration, and statistical significance for conversion experiments.

Design and run statistically rigorous A/B tests and experiments.

Test and evaluation harness for AI agents — scenario suites, deterministic replay, regression diffing, cost and latency budgets.

Idea to AI-generated prototype to customer validation to engineering handoff.

Generate API test suites from route definitions across frameworks: auth, input validation, contract, k6 load testing, mocking, and OpenAPI-driven generation.

Headcount and delivery-capacity planning — effective capacity from raw headcount, hire/contract/defer scenarios, and capacity-vs-commitment gap reports.

Cloud posture security across AWS, Azure, and GCP — IAM least privilege, public exposure, encryption, logging coverage, landing-zone guardrails.

Plan, write and measure ads inside AI assistants and AI search (ChatGPT Ads, Google AI Overviews and AI Mode, Microsoft Copilot).

Plan, sequence, and pressure-test internal announcements before they send.

Performance profiling for Node.js, Python, and Go: CPU flamegraphs, memory leak detection, bundle analysis, query optimization, and k6 load testing.

End-to-end testing with Playwright: test generation, page objects, locator strategy, flaky- test diagnosis, visual regression, and CI integration.

Systematic PR review with blast-radius analysis, security scanning, and breaking-change and test-coverage deltas.

Prompt engineering frameworks for building, testing, versioning, and evaluating prompts: chain-of-thought, few-shot, regression testing, and rubrics.

Browser-based QA combining Chrome MCP control with Python analysis tools.

Multi-agent source security audit with a coverage ledger, independently verified findings, and machine-checked records.

Testing for React/Next.js with Jest, React Testing Library, and Playwright.

Run development from an executable specification with traceable requirement IDs and merge-time coverage gates.

Applied statistics for business and product questions — test selection, assumption checks, power planning, effect sizes with intervals, multiplicity correction.

Implement Stripe integrations for SaaS billing: subscriptions, checkout, proration, usage- based billing, idempotent webhooks, customer portal, dunning, and…

Guide red-green-refactor TDD with test generation, coverage-gap analysis, and multi- framework support.