{
  "id": 5899423,
  "title": "Catch Bad Validation Tags at Compile Time with checkerlint",
  "url": "https://urgent.news/2026/09/06/catch-bad-validation-tags-at-compile-time-with-checkerlint",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-06T03:40:00.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/onurcinar/catch-bad-validation-tags-at-compile-time-with-checkerlint-2iaa"
  },
  "original_language": "en",
  "account": "Struct tags in Go are simply strings, which can lead to bugs if typos or misconfigurations occur. The checkerlint tool, a go/analysis-based static analyzer, reads these tags during build/lint time to catch issues like unknown checker names, type incompatibility, and cross-field target errors before shipping. Checkerlint checks for three main issues: unknown checker names, type compatibility, and cross-field targets. It verifies that checker names are registered, that the field type matches the checker requirements, and that cross-field targets reference existing fields. This tool helps prevent silent runtime errors caused by invalid struct tags, catching them during the development process and ensuring a more stable and reliable application.",
  "summary": "Struct tags are just strings — a typo'd checker name, a wrong-typed field, or a renamed cross-field target all compile fine and fail silently at runtime. checkerlint catches all three before you ship. Struct tags are string literals. The Go compiler checks that your struct compiles — it has no idea what checkers:\"eq-field:Passwrd\" means, so a typo in a field name, a checker applied to a field of…",
  "key_points": [
    "Checkerlint tool checks struct tags at build/lint time",
    "Detects unknown checker names, type incompatibility, cross-field targets",
    "Prevents runtime errors caused by invalid struct tags"
  ],
  "editors_take": "The checkerlint tool helps prevent silent runtime errors caused by invalid struct tags by catching issues during development, ensuring a more stable and reliable application.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}