From a4e694a9021d077eaaa0f38828de8265444d74e0 Mon Sep 17 00:00:00 2001
From: Ren yiwei <85666259+SSDWGG@users.noreply.github.com>
Date: Sat, 13 Jun 2026 17:00:06 +0800
Subject: [PATCH] docs: clarify JSON key selector syntax

---
 src/Vm.sol | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Vm.sol b/src/Vm.sol
index de5b5369..82200cbc 100644
--- a/src/Vm.sol
+++ b/src/Vm.sol
@@ -1022,6 +1022,8 @@ interface VmSafe {
 
     // ======== JSON ========
 
+    /// JSON `key` parameters use selector syntax: use a leading dot for object fields
+    /// (for example, `.bar`) or `$` for the root object.
     /// Checks if `key` exists in a JSON object.
     function keyExistsJson(string calldata json, string calldata key) external view returns (bool);