{
  "title": "Locale key coverage checker",
  "human_url": "https://happytails.ai/en/developer-tools/locale-key-coverage-checker/",
  "agent_url": "https://happytails.ai/agents/en/developer-tools/locale-key-coverage-checker/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/developer-tools/locale-key-coverage-checker.md",
  "content": "Locale key coverage checker\nFind missing and obsolete localization keys, mismatched value types and empty strings across resource bundles.\nHow can we improve this tool?\nReport a problem or share an idea.\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\nHow to use Locale key coverage checker\nPaste the documented input and choose the relevant settings.\nRun the local diagnostic and inspect its findings.\nDownload the complete output and reports. Tables preview the first 200 rows.\nUseful next steps\nJSON path inventory\nJSON diff\nCompare exact resource paths\nNested keys use escaped JSON Pointers and arrays use explicit indices. Missing keys, obsolete keys and mismatched types are separate findings. Empty strings are present but flagged. A complete key set does not prove translation quality.\nKeep the complete report\nJSON records the full result, settings and assumptions. CSV contains exact JSON Pointer paths, value types and JSON value envelopes for every report node, including typed object and array markers. Preview limits do not truncate downloadable reports.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "JSON path inventory",
      "url": "https://happytails.ai/en/data-tools/json-path-inventory/"
    },
    {
      "name": "JSON diff",
      "url": "https://happytails.ai/en/developer-tools/json-diff/"
    }
  ],
  "tool": {
    "id": "locale-key-coverage-checker",
    "category": "developer-tools",
    "built": true,
    "requirements": "Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.",
    "implementation": {
      "fields": [],
      "presentation": "metrics",
      "inputMaxLength": 1000000,
      "inputErrorCode": "DATA_DIAGNOSTIC_INPUT",
      "note": "Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.",
      "experience": {
        "automatic": false,
        "single": false,
        "inputMaxLength": 1000000,
        "inputMode": "text",
        "label": "JSON input",
        "placeholder": "{\n  \"base\": {\n    \"greeting\": \"Hello\",\n    \"menu\": {\n      \"save\": \"Save\",\n      \"cancel\": \"Cancel\"\n    }\n  },\n  \"locales\": {\n    \"fr\": {\n      \"greeting\": \"Bonjour\",\n      \"menu\": {\n        \"save\": \"Enregistrer\"\n      },\n      \"obsolete\": \"Old\"\n    },\n    \"de\": {\n      \"greeting\": \"Hallo\",\n      \"menu\": {\n        \"save\": \"Speichern\",\n        \"cancel\": \"Abbrechen\"\n      }\n    }\n  }\n}",
        "help": "Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Up to 1,000,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "Browser interface",
    "api": null,
    "browser_agent": {
      "supported": true,
      "name": "run_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Locale key coverage checker\n\n- Human page: https://happytails.ai/en/developer-tools/locale-key-coverage-checker/\n- Markdown: https://happytails.ai/en/developer-tools/locale-key-coverage-checker.md\n- Structured JSON: https://happytails.ai/agents/en/developer-tools/locale-key-coverage-checker/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `locale-key-coverage-checker` |\n| Category | developer-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nSupply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.\n\n### Inputs and settings\n\nText input: JSON input.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\n{\n  \"base\": {\n    \"greeting\": \"Hello\",\n    \"menu\": {\n      \"save\": \"Save\",\n      \"cancel\": \"Cancel\"\n    }\n  },\n  \"locales\": {\n    \"fr\": {\n      \"greeting\": \"Bonjour\",\n      \"menu\": {\n        \"save\": \"Enregistrer\"\n      },\n      \"obsolete\": \"Old\"\n    },\n    \"de\": {\n      \"greeting\": \"Hallo\",\n      \"menu\": {\n        \"save\": \"Speichern\",\n        \"cancel\": \"Abbrechen\"\n      }\n    }\n  }\n}\n```\n\nSupply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Up to 1,000,000 characters. Review the settings before running.\n\nNo additional settings are declared for this tool.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nSupply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"locale-key-coverage-checker\",\n  \"category\": \"developer-tools\",\n  \"built\": true,\n  \"requirements\": \"Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.\",\n  \"implementation\": {\n    \"fields\": [],\n    \"presentation\": \"metrics\",\n    \"inputMaxLength\": 1000000,\n    \"inputErrorCode\": \"DATA_DIAGNOSTIC_INPUT\",\n    \"note\": \"Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"inputMaxLength\": 1000000,\n      \"inputMode\": \"text\",\n      \"label\": \"JSON input\",\n      \"placeholder\": \"{\\n  \\\"base\\\": {\\n    \\\"greeting\\\": \\\"Hello\\\",\\n    \\\"menu\\\": {\\n      \\\"save\\\": \\\"Save\\\",\\n      \\\"cancel\\\": \\\"Cancel\\\"\\n    }\\n  },\\n  \\\"locales\\\": {\\n    \\\"fr\\\": {\\n      \\\"greeting\\\": \\\"Bonjour\\\",\\n      \\\"menu\\\": {\\n        \\\"save\\\": \\\"Enregistrer\\\"\\n      },\\n      \\\"obsolete\\\": \\\"Old\\\"\\n    },\\n    \\\"de\\\": {\\n      \\\"greeting\\\": \\\"Hallo\\\",\\n      \\\"menu\\\": {\\n        \\\"save\\\": \\\"Speichern\\\",\\n        \\\"cancel\\\": \\\"Abbrechen\\\"\\n      }\\n    }\\n  }\\n}\",\n      \"help\": \"Supply a base resource and locale bundles. Exact JSON Pointer leaf paths identify missing and obsolete keys, type mismatches and empty strings. Arrays use explicit indices; empty containers are leaf values. Coverage measures keys and types, not translation quality. At most 64 bundles and 2,000 reference keys. Up to 1,000,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nFind missing and obsolete localization keys, mismatched value types and empty strings across resource bundles.\n\nHow can we improve this tool?\n\nReport a problem or share an idea.\n\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\n\n### How to use Locale key coverage checker\n\n1. Paste the documented input and choose the relevant settings.\n2. Run the local diagnostic and inspect its findings.\n3. Download the complete output and reports. Tables preview the first 200 rows.\n\n## Useful next steps\n\n- [JSON path inventory](https://happytails.ai/en/data-tools/json-path-inventory/) ([Markdown](https://happytails.ai/en/data-tools/json-path-inventory.md))\n\n- [JSON diff](https://happytails.ai/en/developer-tools/json-diff/) ([Markdown](https://happytails.ai/en/developer-tools/json-diff.md))\n\n## Compare exact resource paths\n\nNested keys use escaped JSON Pointers and arrays use explicit indices. Missing keys, obsolete keys and mismatched types are separate findings. Empty strings are present but flagged. A complete key set does not prove translation quality.\n\n### Keep the complete report\n\nJSON records the full result, settings and assumptions. CSV contains exact JSON Pointer paths, value types and JSON value envelopes for every report node, including typed object and array markers. Preview limits do not truncate downloadable reports.\n"
}