Linting Checks (platformos-check-common):

1. TranslationKeyExists enhancement — When a translation key doesn't exist, suggests the nearest valid key using Levenshtein distance (e.g., general.titel → "Did you mean general.title?"). Also introduces shared levenshtein and flattenTranslationKeys utilities.

2. NestedGraphQLQuery (new check) — Detects {% graphql %} tags inside {% for %} or {% tablerow %} loops (N+1 query pattern). Downgrades to INFO severity if wrapped in {% cache %}, and ignores {% background %} blocks.

3. MissingRenderPartialArguments (new check) — When rendering a partial that has {% doc %} with @param declarations, reports an error if required parameters are missing from the {% render %} call. Includes fix suggestions.

LSP Features (platformos-language-server-common):

4. GraphQL field hover & completions — Adds hover info and autocompletion for .graphql files using the graphql-language-service library, powered by the project's GraphQL schema.