food-ai/CLAUDE.md

Project Rules

Language

• All code comments must be written in English.
• All git commit messages must be written in English.

Localisation

Rule: Every table that stores human-readable text must have a companion {table}_translations table. The base table always contains the English canonical text (used as fallback). Translations live only in _translations tables — never as extra columns (name_ru, title_de).

SQL pattern

-- Base table — English canonical text always present
CREATE TABLE cuisines (
    slug       VARCHAR(50) PRIMARY KEY,
    name       TEXT NOT NULL,
    sort_order SMALLINT NOT NULL DEFAULT 0
);
-- Translation companion
CREATE TABLE cuisine_translations (
    cuisine_slug VARCHAR(50) REFERENCES cuisines(slug) ON DELETE CASCADE,
    lang         VARCHAR(10) NOT NULL,
    name         TEXT NOT NULL,
    PRIMARY KEY  (cuisine_slug, lang)
);

Query pattern

SELECT COALESCE(ct.name, c.name) AS name
FROM cuisines c
LEFT JOIN cuisine_translations ct ON ct.cuisine_slug = c.slug AND ct.lang = $lang

Already compliant tables

units + unit_translations, ingredient_categories + ingredient_category_translations, ingredients + ingredient_translations + ingredient_aliases, recipes + recipe_translations, cuisines + cuisine_translations, tags + tag_translations, dish_categories + dish_category_translations, dishes + dish_translations, recipe_ingredients + recipe_ingredient_translations, recipe_steps + recipe_step_translations.

Rule when adding new entities

When adding a new entity with text fields, always create a {table}_translations companion table and use LEFT JOIN COALESCE in all read queries.

File and Directory Naming

• File names: snake_case — token_verifier.go, wire_gen.go, entity.go.
• Package directories: lowercase, no separators — follow Go convention (savedrecipe/, openai/, infra/). Do not use underscores in package names.
• Non-package directories (migrations, docs, scripts): snake_case is acceptable.

Naming

No abbreviated variable names. Variables must use full descriptive names. Single- or two-letter names are only allowed when the abbreviation is the full description (e.g., a loop index i, a matrix coordinate x).

Examples

Avoid	Use instead
err	parseError, writeError, dbError, validationError
ctx	requestContext, handlerContext, queryContext
s	service, server
r	request, repository
w	writer, responseWriter
h	handler
req	request
res	response, result
msg	message
cfg	config
db	database
tx	transaction
buf	buffer
tmp	temp, or a descriptive name

This rule applies to all languages in this repo (Go and Dart). In Go, name variables to avoid shadowing the error built-in and the context package — use descriptive prefixes: parseError, requestContext, etc.