{
  "slug": "wrangler-dev-generates-worker-configuration-types-a0569a8053e7",
  "title": "wrangler dev generates worker configuration types",
  "tools": [
    "wrangler"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-01-07T11:48:07.000Z",
  "announced_at": "2026-01-07T11:48:07.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When starting a Worker’s local development server, enable automatic configuration type generation with `wrangler dev --types` or set `dev.generate_types` to `true` in Wrangler configuration.",
    "examples": [
      "wrangler dev --types",
      "{\n  \"dev\": {\n    \"generate_types\": true\n  }\n}"
    ],
    "gotchas": [
      "Version: 4.57.0",
      "--types: Boolean flag; generate types from Worker configuration. Defaults to false.",
      "dev.generate_types: Boolean configuration option; generate types from Worker configuration. Defaults to false.",
      "Types are generated when the local Wrangler development server starts."
    ]
  },
  "why_it_matters": "When starting local development for a Worker, generate its configuration types automatically.",
  "sources": [
    "https://github.com/cloudflare/workers-sdk/releases/tag/wrangler%404.57.0",
    "https://developers.cloudflare.com/workers/wrangler/commands/workers/",
    "https://developers.cloudflare.com/workers/wrangler/configuration/"
  ],
  "rank": 0.97049,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v1+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "backfill-20261007",
    "verdict_id": "backfill-20261007:backfill-20261007-400cc3dbe35a89c2-3:gate",
    "evidence_hash": "b42840c69553dfd18d4e4f957a940bdd0b93354cea55098d18a7b23b1ea53e86"
  },
  "review": {
    "draft_hash": "fc451007f3691c4342e6c1005491758f3491e9321c3eb4387103c37bd5057edd",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "backfill-20261007:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.97 >= 0.9; 2 needed) and Jev gave 0.79 (>= 0.6 needed)."
  }
}