Use when you need to run, serve, or manually test a Twake/Cozy cozy-web app locally — booting cozy-stack + CouchDB + SSO, provisioning an instance via SCIM, installing the locally-watched app, and seeding data. Triggers when a session working on a cozy-web app (has manifest.webapp) needs a live environment to see its changes.
Use when writing or reviewing JavaScript/TypeScript in Twake/Cozy projects. Enforces async/await over Promise chains, null over undefined, error handling contract (null / typed result / throw), function declaration style, strict equality, named exports only (never export default), date handling via Intl/date-fns (never moment.js), AppLinker for redirections (never window.location), and business-logic-only comments.
Use when writing, reviewing, or refactoring React components in Twake/Cozy frontend projects. Enforces functional components, React.memo usage, event handler naming, no inline styles, and twake-mui first with cozy-ui as fallback (never raw Material-UI).
Use when writing, reviewing, or scaffolding TypeScript in Twake/Cozy projects. Delta over twake-javascript-conventions — read that first. Enforces explicit types and exported types, named exports only (never export default, types included), type vs interface, unknown in catch, satisfies, strict mode, constrained generics, string unions over enums, TC39 decorators, and bans any / as unknown as T / @ts-ignore / unconstrained generics / void without justification.
Use when reading, writing, or designing data access against a Cozy stack from a Twake/Cozy React app — anything touching cozy-client, doctypes, Q(), client.query, useQuery, or client.collection. Forbids direct collection access that bypasses the redux store and offline cache, enforces Q() definitions through client.query/useQuery, mandates a centralized queries module, query alias naming per cozy-guidelines, an explicit fetchPolicy on every query, and the canonical where/partialIndex/indexFields/sortBy/limitBy pattern with the `{ $gt: null }` sentinel for sortBy fields.
Use when debugging, adding features to, or testing changes inside any cozy-* or twake-* library consumed by a Twake/Cozy React frontend app. Forbids hand-editing files under node_modules; directs to the linagora/cozy-libs monorepo and to yarn link or rlink for local testing.
Use when writing, reviewing, or refactoring frontend tests in Twake/Cozy React projects. Enforces @testing-library/react (never Enzyme or TestCafe), data-testid attributes, queryBy + toBeInDocument()/toBe(null) patterns, colocated *.spec files (no __tests__ folders), and bans snapshot tests.
Use when writing commit messages, creating branches, or opening pull requests on Linagora/Twake/Cozy projects. Enforces Conventional Commits, one subject per commit (atomic commits), a structured PR workflow (branch, commit, push, gh pr create), lowercase PR titles under 70 chars, and Summary-only PR bodies with no invented motivation and no em dashes.