Browse reusable Agent Skills, each with a clear purpose and practical guidance.
Write failing tests for a TDD slice based on acceptance criteria and codebase conventions. Use when the "red" phase of red-green-refactor requires tests that define expected behavior before implementation exists. Discovers codebase test conventions first, writes test files that compile or parse but fail because the implementation does not yet exist, and reports test metadata. Works with any language or test framework.
Run scoped tests for a TDD slice, determine the appropriate test framework and command, and report structured pass/fail results. Use when tests need to be executed after writing, implementing, or refactoring code. Reads test metadata, discovers the test framework if needed, executes the scoped test command, parses output into structured results, and reports whether tests passed or failed. Handles compilation errors, missing dependencies, timeouts, and works with any language and test framework.
Evaluate the quality of TDD tests against slice acceptance criteria, codebase conventions, and Red-phase execution results, producing a structured review with Accept or Revise recommendations. Use when tests written during the Red phase of red-green-refactor need quality review — checking coverage of acceptance criteria, conformance with codebase test conventions, test quality (naming, assertions, isolation, readability, triviality), edge-case and error-path coverage, and whether Red-phase failures indicate correctly missing implementation. Flags trivial low-value tests that add more maintenance cost than testing value. Discovers codebase conventions independently and produces an actionable review report.
Diagnose Stac build, deploy, rendering, caching, and navigation issues using repeatable checks. Use when users report stac build finding no screens, deploy mismatches, runtime unknown widget/action errors, cache staleness, or migration regressions.
Critically review an existing or proposed Stencila theme artifact for correctness, token usage, target coverage, cross-target portability, dark-mode handling, maintainability, and approval readiness. Use when asked to review, critique, assess, audit, or validate a theme.css file, theme patch, theme plan, site theme, document theme, plot theme, print or PDF theme, check design tokens, assess DOCX or email behavior, review dark mode support, or validate with stencila themes validate.
Use when profiling CPU/memory hot paths, generating flame graphs, or capturing JFR/perf evidence.
Use when user asks to "validate delivery", "check readiness", or "verify completion". Runs tests, build, and requirement checks with pass/fail instructions.
Use when synthesizing perf findings into evidence-backed recommendations and decisions.
Use when appending structured perf investigation notes and evidence.
Audits App Store submission readiness and rejection risk across current review guidelines, PrivacyInfo.xcprivacy and required-reason APIs, privacy labels, ATT, StoreKit payments, metadata, entitlements, widgets, and Live Activities. Use when preparing a submission, responding to rejection, reconciling privacy evidence, or separating upload blockers from cleanup.