{
  "instruction": "Enable strict mode and noUncheckedIndexedAccess in tsconfig.json",
  "relevant_when": "Agent creates or configures a TypeScript project",
  "context": "Every tsconfig.json must have strict: true (never cherry-pick individual strict options) and noUncheckedIndexedAccess: true. Without strict mode, TypeScript misses null/undefined bugs, implicit any types, and incorrect function types. Without noUncheckedIndexedAccess, Record and array index access hides potential undefined values.",
  "sources": [
    {
      "type": "file",
      "filename": "skills/typescript-project-structure/SKILL.md",
      "tile": "tessl-labs/typescript-project-structure@0.2.0"
    }
  ],
  "checklist": [
    {
      "name": "strict-true",
      "rule": "tsconfig.json (or the base tsconfig) has \"strict\": true in compilerOptions — not individual strict flags cherry-picked",
      "relevant_when": "Agent creates any tsconfig.json file"
    },
    {
      "name": "no-unchecked-indexed-access",
      "rule": "tsconfig.json has \"noUncheckedIndexedAccess\": true in compilerOptions",
      "relevant_when": "Agent creates any tsconfig.json file"
    },
    {
      "name": "no-strict-false",
      "rule": "No tsconfig in the project sets \"strict\": false or disables individual strict checks like \"strictNullChecks\": false",
      "relevant_when": "Agent creates any tsconfig.json file"
    }
  ]
}