tsconfig.json

{
  "compilerOptions": {
    "lib": ["ESNext", "DOM"],
    "target": "ESNext",
    "module": "ESNext",
    "moduleDetection": "force",
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "verbatimModuleSyntax": true,
    "resolveJsonModule": true,
    "noEmit": true,

    // Every import is written from the repository root:
    // `@/tools/fight-dump-parser.ts`, never `../../tools/fight-dump-parser.ts`.
    // A path that reads the same wherever it appears says
    // where the thing comes from, and moving a file no longer rewrites the
    // imports of its neighbours.
    "baseUrl": ".",
    "paths": {
      "@/*": ["./*"]
    },

    "strict": true,
    "skipLibCheck": true,

    // There is no linter here on purpose — the compiler is its replacement.
    // These two turn dead code into a build failure instead of something to
    // read past, which is the only thing standing between this tree and the
    // uncalled functions the previous one accumulated.
    "noUnusedLocals": true,
    "noUnusedParameters": true,

    // The decoder lives on indexing regex groups and arrays. This forces every
    // access to prove itself rather than assume a hit.
    "noUncheckedIndexedAccess": true,

    "exactOptionalPropertyTypes": true,
    "noImplicitReturns": true,
    "noImplicitOverride": true,
    "noFallthroughCasesInSwitch": true,
    "allowUnusedLabels": false,
    "allowUnreachableCode": false
  }
}