Tools

Use automatically during development workflows when making claims about tests, builds, verification, or code quality requiring concrete evidence to ensure trust through transparency.

Use when mocha test structure, hooks, and async testing patterns for JavaScript testing.

Handle HTTP requests with Phoenix controllers including actions, parameters, rendering, flash messages, and redirects

Use when capturing and reporting errors to Sentry, adding context, or handling exceptions. Covers error boundaries, context enrichment, and fingerprinting.

Use when developing custom Clippy lints, implementing lint passes, and contributing to Clippy for Rust code standards.

Expert guidance for using the GitLab CLI (glab) to manage GitLab issues, merge requests, CI/CD pipelines, repositories, and other GitLab operations from the command line. Use this skill when the user needs to interact with GitLab resources or perform GitLab workflows.

Use when C++ templates and metaprogramming including template specialization, SFINAE, type traits, and C++20 concepts.

Use when modifying, removing, or refactoring code that lacks test coverage. Emphasizes the danger of untested changes and the RGR workflow to add characterization tests before modifications.

Use when writing or modifying Bash/shell scripts. Covers script structure, variables, quoting, conditionals, and loops with modern best practices.

Use when managing memory in C programs with malloc/free, pointers, and avoiding common memory safety pitfalls.

Use when custom ESLint rules and plugins including rule development, AST traversal, and publishing.

Use when implementing advanced Zustand patterns including transient updates, subscriptions with selectors, store composition, and performance optimization techniques.

Use when creating or modifying GitHub Actions workflow files. Provides guidance on workflow syntax, triggers, jobs, steps, and expressions for creating valid GitHub Actions workflows that can be tested locally with act.

Use when working with Zustand in TypeScript projects. Covers type-safe store creation, typed selectors, and advanced TypeScript patterns with Zustand.

Use when rSpec mocking with doubles, stubs, mocks, spies, and partial mocking strategies.

Use when configuring Clippy for Rust projects with TOML config, lint groups, attributes, and workspace setup.

Use when eSLint configuration including config files, extends, plugins, and environment setup.

Use when configuring GitLab CI/CD pipelines, defining stages, or setting up workflow rules. Covers pipeline structure, stage ordering, and execution flow.

Use when integrating tools, permissions, and MCP servers with Claude AI agents using the Agent SDK.

Reconcile workflow state files to ensure checkpoints are properly updated. Use when state files are out of sync, after subagent completion without handoff, when switching workflows, or when user runs /reconcile command.