skillet

Use when writing async code, using asyncio.gather, handling concurrent operations. Triggers on "asyncio", "async", "await", "gather", "concurrent", "parallel", "fail-fast", "timeout", "race condition", "cancellation", "coroutine", "task", "CancelledError", or when writing async functions.

Use when encountering errors, bugs, or problems. Triggers on "bug", "error", "fix", "debug", "traceback", "stack trace", "exception", "crash", "broken", "not working", "failing", "issue", "workaround", "wrapper", "hack", "reproduce", "bisect", or when tempted to add complexity to avoid fixing the real problem.

Use when building UI with NiceGUI, creating components, fixing styling issues. Triggers on "nicegui", "quasar", "tailwind", "ui.row", "ui.column", "ui.card", "ui.dialog", "gap", "spacing", "layout", "modal", "component", "styling", "flexbox", "chart", or when creating/editing UI code.

Use when writing new code, implementing features, or refactoring. Triggers on "pattern", "reuse", "duplicate", "extract", "helper", "refactor", "architecture", "DRY", "don't repeat yourself", "abstract", "reusable", "similar", "existing code", or when about to write new functionality.

Use when reviewing code, PRs, or diffs. Triggers on "review", "code review", "PR", "pull request", "diff", "check this", "look at this code", "quality", "refactor", "egregious", "cross-file", "duplicate", "duplication", or when examining code for issues.

Use when writing or modifying tests, fixing bugs with TDD, reviewing test code. Triggers on "test", "tests", "testing", "TDD", "test-driven", "pytest", "add tests", "write tests", "unit test", "integration test", "test coverage", "bug fix", "fix bug", "mock", "fixture", "assert", "conftest", "parametrize", "async test", or when editing files in tests/ directory.

Use when adding type hints, fixing type checker errors, working with Pydantic models. Triggers on "type", "types", "typing", "Pydantic", "BaseModel", "pyright", "basedpyright", "mypy", "type error", "type hint", "annotation", "Any", "dict", "list", "Optional", "Cannot assign", "Incompatible types", "Missing return type", "reportArgumentType", or when defining function signatures or data models.

Root cause fixing and avoiding workarounds. Use when encountering errors, bugs, or problems. Triggers on "bug", "error", "fix", "debug", "workaround", "wrapper", "hack", "broken", "not working", "failing", "issue", or when tempted to add complexity to avoid fixing the real problem.

NiceGUI development best practices for Python web UIs. Use when building UI components, fixing layout issues, or working with NiceGUI/Quasar/Tailwind. Triggers on "nicegui", "quasar", "tailwind", "ui.row", "ui.column", "ui.card", "ui.dialog", "gap", "spacing", "layout", "modal", "component", "styling", "flexbox", "chart", or when creating/editing UI code.

Pattern discovery and code reuse for Python projects. Use when writing new code, implementing features, or refactoring. Triggers on "pattern", "reuse", "duplicate", "extract", "helper", "refactor", "architecture", "existing code", "search for", "similar", "copy", "paste", or when about to write new functionality.

Code review best practices for Python projects. Use when reviewing code, PRs, or diffs. Triggers on "review", "code review", "PR", "pull request", "diff", "check this", "look at this code", "quality", "refactor", or when examining code for issues.

Python testing best practices with pytest, TDD, and mocking. ALWAYS use this skill BEFORE writing or modifying any test code. Triggers on "test", "tests", "testing", "TDD", "test-driven", "pytest", "add tests", "write tests", "test this", "unit test", "integration test", "test coverage", "bug fix", "fix bug", "mock", "fixture", "assert", or when about to create/edit files in tests/ directory.

Python type annotations and Pydantic best practices. Use when working with types, models, or data structures. Triggers on "type", "types", "typing", "Pydantic", "BaseModel", "dict", "list", "tuple", "annotation", "hint", "Any", "TypedDict", "dataclass", "model", "schema", or when defining function signatures or data models.

Use when writing async code, using asyncio.gather, handling concurrent operations, or when user mentions "asyncio", "async", "await", "gather", "concurrent", "parallel tasks", "fail-fast", "timeout", "race condition", "cancellation".

Use when asked to "review code", "review PR", "review diff", "check this PR", "do a code review", or mentions "code review", "PR review", "full diff", "cross-file patterns", "code quality", "review changes".

Use when building UI with NiceGUI, creating components, fixing styling issues, or when user mentions "nicegui", "quasar", "tailwind", "ui.row", "ui.column", "gap spacing", "state management", "controller", "dialog", "modal", "ui component", "ui layout".

Use when writing or modifying tests, fixing bugs with TDD, reviewing test code, or when user mentions "test", "tests", "testing", "TDD", "test-driven", "pytest", "add tests", "write tests", "unit test", "integration test", "test coverage", "bug fix", "fix bug", "verify", "edge case", "mocking", "patch.object".

Use when adding type hints, fixing type checker errors, expanding type coverage, or when user mentions "type check", "pyright", "basedpyright", "mypy", "type hints", "type errors", "type annotations", "typing", "Any type", "weak types".

Write Claude Code skills and SKILL.md files. Use when creating new skills, writing skill content, structuring SKILL.md, organizing skill directories, or when user mentions "write skill", "create skill", "author skill", "new skill", "skill structure", "SKILL.md", "skill content", "skill template".

Create skill groups (multiple related skills packaged as a plugin). Use when creating plugins, organizing multiple related skills, building skill families, packaging tools together, or when user mentions "plugin", "multiple skills", "related skills", "skill group", "skill family", "organize skills", "cross-reference", "package skills", "shared agents". ALWAYS consider this pattern when someone asks to "create a skill" - they often need a skill GROUP packaged as a plugin.

Brainstorm and validate names for plugins, skills, agents, and commands. Use when naming a new plugin, choosing atom names, validating naming conventions, or when user mentions "name plugin", "name skill", "naming convention", "brainstorm names", "what should I call", "plugin name", "good name for".

Package skills, agents, commands, and hooks as Claude Code plugins. Use when creating plugins, packaging skills for distribution, setting up plugin structure, dogfooding plugins, or when user mentions "plugin structure", "plugin.json", "package plugin", "distribute plugin", "marketplace", "dogfood", "install plugin", "plugin placement", "--plugin-dir".

Optimize skill triggers and descriptions for reliable activation. Use when skill is not triggering, optimizing trigger keywords, writing frontmatter, debugging activation, or when user mentions "trigger", "frontmatter", "description", "skill not triggering", "optimize trigger", "skill won't fire", "skill activation", "trigger keywords".