cds-snc

Run and triage Python quality gates with minimal, root-cause fixes; use when validating feature work before completion.

Apply project testing standards for app/tests layout, naming, dependency overrides, and route/service coverage.

Apply typed FastAPI route patterns with clean dependency boundaries, stable error mapping, and test coverage for success/failure paths.

Author review-ready implementation plans grounded in real code, with a hard single-PR size gate and decomposition into safe incremental tasks when exceeded.

Apply partitioned settings and singleton provider patterns; use when adding or refactoring settings and provider wiring.

Operate Backlog.md tasks through the backlog CLI only; use when reading, planning, executing, or finalizing any task under backlog/tasks.

Apply pluggy registration and lifespan startup patterns for package discovery, initialization ordering, and testable startup behavior.

Choose correct Python type boundaries (Protocol, dataclass, BaseModel, TypedDict) for maintainable FastAPI architecture.

Convert a grill-me conversation plus real codebase evidence into a complete OpenSpec change with proposal, design, specs, and tasks ready for implementation.

Build Government of Canada web pages and applications using the GC Design System (GCDS). Use this skill whenever the user asks to build, design, or code anything for a Government of Canada (GC) website, Canada.ca page, federal government digital service, or any product that must follow GC brand standards. Trigger for: "GC Design System", "gcds", "Canada.ca page", "government of Canada website", "federal government app", "gc-design", "bilingual government page", "GC web component". This skill covers installation, all native GCDS components (Web Components + React), CSS Shortcuts utility classes, design tokens, page templates, AND advanced gap-filling components (Modal, Rich Card, Tabs, Badge, Toast, Skeleton) built with GCDS design language + shadcn/Tailwind.

Use when adding backend features, fixing backend bugs, or refactoring the FastAPI backend in this repository, especially when work touches FastAPI routes, services, SQLAlchemy models, Alembic migrations, Casbin access control, or protected admin resources.

Use when adding frontend features, fixing frontend bugs, or refactoring the Vite and React frontend in this repository, especially when work touches TanStack Router routes, feature pages, shared UI wrappers, React Query, Zustand auth state, fetch helpers, or frontend tests.

Review the pending diff (or a named page/component) for WCAG 2.1 AA accessibility issues — semantic HTML, ARIA, keyboard navigation, focus management, colour contrast, forms, and screen-reader behaviour. Use before merging any UI-touching change, or when the user asks for an accessibility/a11y review.

Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.