Use when editing Vite projects, vite.config.ts, vite.config.js, Vite plugins, HMR, asset bundling, frontend build settings, deployment config, or Litestar/Vite integration.

Use when deploying ASGI apps with uvicorn, editing uvicorn CLI commands, Config or Server usage, workers, reload, event loop selection, SSL, lifespan, logging, or development server behavior.

Use when tracing execution paths, mapping dependencies, understanding unfamiliar code, following data flow, investigating end-to-end behavior, debugging call chains, or deciding which files to read next.

Use when writing or refactoring tests, editing test_*.py, *.test.ts, *.spec.ts, conftest.py, vitest.config.ts, pytest fixtures, mocks, coverage, async tests, anyio, or test failure debugging.

Use when creating, adopting, refactoring, or operating Terraform, *.tf files, .terraform.lock.hcl, terragrunt.hcl, root modules, backends, state, workspaces, imports, CI plan/apply, tests, or policy checks.

Use when editing TanStack code, @tanstack imports, useQuery, createRouter, React Query, TanStack Router, Table, Form, Store, file-based routing, data fetching, or SPA state management.

Use when styling with Tailwind CSS, editing tailwind.config.ts, tailwind.config.js, @tailwind directives, utility classes, responsive layouts, @apply, cn(), @theme config, dark mode, or forms.

Use when editing Svelte components, .svelte files, svelte.config.js, Svelte 5 runes, $state, $derived, SvelteKit, component state, or migrating away from Svelte 4 patterns.

Use when writing T-SQL, editing SQL Server .sql files, using sqlcmd, SQL Server connection strings, stored procedures, execution plans, indexes, Always On, JSON, security, or connector code.

Use when editing SQLAlchemy code, sqlalchemy imports, mapped_column, DeclarativeBase, ORM models, relationships, select() queries, async sessions, engines, events, or migrations.

Use when editing Sphinx docs, conf.py, .rst files, docs/source, autodoc, Read the Docs builds, Shibuya or Immaterial themes, Wasm extensions, VHS terminal recordings, or Sphinx CI.

Use when editing shadcn/ui code, components.json, cn() utility, Radix primitives, shadcn add workflows, dialogs, forms, data tables, command palettes, or Tailwind component composition.

Use when reviewing authentication, authorization, user input, secrets, API keys, database queries, file uploads, session management, external API calls, OWASP risks, or data handling attack surface.

Use when editing SAQ task queues, saq imports, background jobs, async workers, enqueueing jobs, CronJob schedules, queue configuration, worker lifecycle, or async-native task processing.

Use when editing Rust files, .rs, Cargo.toml, Cargo.lock, workspaces, async code, error handling, PyO3, maturin, napi-rs, C ABI, platform support, tests, or performance-critical Rust paths.

Use when editing React code, .tsx or .jsx files, react imports, components, hooks, state, client components, framework-scoped server components, backend API integration, or React upgrades.

Use when deploying to Railway, editing railway.toml, railway.json, Procfile, configuring Railway services, databases, workers, environment variables, or troubleshooting Railway deployments.

Use when editing Python files, pyproject.toml, requirements.txt, setup.py, setup.cfg, uv workflows, ruff, mypy, typing, packaging, scripts, Cython, or Mypyc extension builds.

Use when defining Pydantic models, BaseModel, BaseSettings, pydantic_settings, field validators, model validators, serializers, TypeAdapter, settings env config, external data validation, or v1-to-v2 migration.

Use when building standalone Python executables with PyApp, bundling Python runtimes, preparing air-gapped or multi-architecture binaries, patching PyApp defaults, or compiling single-binary assets.

Use when writing PostgreSQL SQL, editing .sql files, psql commands, postgresql.conf, psycopg or asyncpg code, indexes, JSONB, PL/pgSQL, extensions, roles, RLS, replication, migrations, or query tuning.

Use when running Podman, editing Containerfile, managing rootless containers, pods, podman-compose, systemd services, OCI images, secrets, or Docker-compatible workflows without a Docker daemon.

Use when analyzing tradeoffs, comparing approaches, weighing options, assessing risks, stress-testing conclusions, identifying blind spots, or applying multiple viewpoints to a decision.

Use when reviewing hot paths, slow code, database queries, N+1 risks, memory usage, loops, I/O, caching strategy, concurrency, latency-sensitive paths, or resource efficiency.