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Browse reusable Agent Skills, each with a clear purpose and practical guidance.
newton-api-design
Use when designing, adding, or reviewing public API for the Newton physics engine — class names, method signatures, type hints, docstrings, or parameter conventions. Also use when unsure if new API conforms to project conventions.
stress-test
Orchestrate a destructive demo-workspace QA stress test for React on Rails leakage, memory, performance, security, and framework edge cases. Use only when the user explicitly asks to run stress testing.
ab-servers
How to drive shaka-perf twin-servers (the control + experiment Docker pair) from an agent — which subcommand to use for build, start containers, start the app, stop, run a command inside a side, or sync code changes. Bare `shaka-perf servers` is for humans (interactive menu); agents must call subcommands directly. Use whenever you need to bring twin-servers up, restart them after a change, or run something inside a container. Triggers include "servers", "twin servers", "ab servers", "control/experiment server", "run X in container", "ab tests failing".
assess-abtest-quality
Audit existing .abtest.ts files plus the latest `shaka-perf audit` results for anti-patterns, false-positive PASSes (blank/high-whitespace screenshots), and coverage gaps. Use whenever the user wants to review, audit, improve, or "assess quality" of AB tests — phrasings like "are my visreg tests any good?", "check the ab tests", "why is this test passing?", or "make these tests more reliable".
discover-abtests
Crawl a website and auto-generate .abtest.ts files for shaka-perf visreg visual regression testing. Use this skill whenever the user wants to discover, generate, or scaffold AB tests for a URL — even if they just say "set up tests for localhost:3020", "generate tests for this site", or "create visreg tests".
optimize-rsc-performance
Use when planning, implementing, validating, or reviewing React Server Components (RSC) page performance optimization in React on Rails or React on Rails Pro work. Guides agents through clean baseline/control setup, one-change experiments, visual parity checks, performance measurement, package-stack discipline, artifact recording, and PR evidence for RSC static pages.
react-on-rails-release-train-issue-evaluation
Use when evaluating React on Rails GitHub issues for release-train targeting, especially deciding whether new, follow-up, or non-started issues belong on release/17.0.0, another release/X.Y.Z branch, or main.