doc: clarify behavior of destructured assertion methods in Assert instance

Author: miguelmarcondesf

doc/api/assert.md

@@ -242,6 +242,21 @@ assertInstance.deepStrictEqual({ a: 1 }, { a: 2 });
 // Shows a full diff in the error message.
 ```
 
+**Important**: When destructuring assertion methods from an `Assert` instance, the methods lose their connection to the instance's configuration options (such as `diff` and `strict` settings). The destructured methods will behave with default options instead.
+
+```js
+const myAssert = new Assert({ diff: 'full' });
+
+// This works as expected - uses 'full' diff
+myAssert.strictEqual({ a: 1 }, { b: { c: 1 } });
+
+// This loses the 'full' diff setting - uses default 'simple' diff
+const { strictEqual } = myAssert;
+strictEqual({ a: 1 }, { b: { c: 1 } });
+```
+
+To maintain custom options when using destructured methods, pass the options to individual assertion calls or avoid destructuring.
+
 ## `assert(value[, message])`
 
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