chore: forbid !! double negation in eslint

Use Boolean(x) instead of !!x for explicit type coercion.

Author: Ondrej Machala

eslint.config.js

@@ -89,6 +89,12 @@ export default tseslint.config(
             'ArrowFunctionExpression[params.length=1][params.0.type=Identifier][body.type=MemberExpression][body.computed=false]',
           message: 'Use destructuring in callback: prefer ({ prop }) => prop over f => f.prop',
         },
+        {
+          // bans `!!x` - prefer `Boolean(x)` for clarity
+          selector:
+            "UnaryExpression[operator='!'][argument.type='UnaryExpression'][argument.operator='!']",
+          message: 'Use Boolean(x) instead of !!x for explicit type coercion.',
+        },
       ],
 
       // Let TypeScript infer return types

src/cli/handlers.ts

@@ -140,7 +140,7 @@ export async function shotAction(
   return handleDefaultCommand({
     configPath,
     sessionKey: globalOptions.sessionKey,
-    hasExplicitConfig: !!globalOptions.config,
+    hasExplicitConfig: Boolean(globalOptions.config),
     clean: options?.clean,
     workers: options?.workers,
     headed: options?.headed,