zemptime-marketplace

Use when designing database schema, writing migrations, or making data storage decisions - enforces UUIDs, account_id multi-tenancy, state-as-records, no foreign keys, and proper index patterns

Use when designing content systems where 5+ distinct types need to comingle in feeds, timelines, or searches with shared metadata and operations - NOT for simple polymorphic associations or 1-3 similar types

Use when writing background jobs or async operations - enforces thin job wrappers (3-5 lines) that delegate to models using _later/_now naming pattern

Use when writing Rails models - enforces state-as-records not booleans, concerns as adjectives namespaced under model, invocation ordering, and private indentation

Use when naming classes, methods, routes in vanilla Rails codebases - fixes concern verb/noun confusion, bang method misuse, custom action anti-patterns

Use when refactoring Ruby/Rails code, organizing methods, deciding on guard clauses vs if/else, or following 37signals conventions - these patterns are counter to standard Ruby style guides

Use when writing Rails tests - enforces fixtures-only, integration-style controller tests, Current context setup, simple naming, and Minitest syntax

Use when writing ERB templates, partials, view helpers, or Turbo Stream responses - covers partial organization, optional locals, CSS class patterns, collection rendering

Use when planning Rails features or breaking down work into PRs - enforces 2-5 file PRs, bug fix separation, and one-sentence scope test

Use when refactoring fat Rails models with repetitive prefixes like entropy_*, notification_*, or multi-association coordination. Extracts PORO wrappers that group operations around nouns/concepts.