# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Build/Test Commands
- Setup: `mix setup`, `mix deps.get`, `mix ecto.setup`
- Run server: `mix phx.server`
- Tests: `mix test`, `mix test path/to/test_file.exs`, `mix test path/to/test_file.exs:line_number`
- Format/Lint: `mix format`, `mix credo`
- Assets: `mix assets.setup`, `mix assets.build`, `mix assets.deploy`

## Code Style Guidelines
- Formatting: Max line length 120, use `mix format`
- Naming: snake_case for variables/functions, descriptive module namespacing (Core.Accounts.User)
- Organization: Boundary-driven modules (core/, schema/, web/)
- Error handling: Return {:ok, result} or {:error, changeset} tuples, pattern matching
- Testing: Descriptive test names, fixtures, shared setup, tagged tests
- Imports: Organize at top, import frequently used functions, follow boundary pattern
- Documentation: `@doc` for public functions, `@moduledoc false` for internal modules
- Use `@impl` for callback implementations