Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: antigravity 0 -> 1
attrpath: antigravity
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] 
Going to be running update for following packages:
 - antigravity-1.19.6

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - antigravity-1.19.6: UPDATING ...
 - antigravity-1.19.6: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/an/antigravity/information.json b/pkgs/by-name/an/antigravity/information.json
index e97eb4597c91..c2bee6a2c83b 100644
--- a/pkgs/by-name/an/antigravity/information.json
+++ b/pkgs/by-name/an/antigravity/information.json
@@ -1,22 +1,22 @@
 {
-  "version": "1.19.6",
+  "version": "1.20.4",
   "vscodeVersion": "1.107.0",
   "sources": {
     "x86_64-linux": {
-      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.19.6-6514342219874304/linux-x64/Antigravity.tar.gz",
-      "sha256": "80522c9d60bcc04bb13d40fa136601d184dc83f36bb9065eb29cc456db4c29e1"
+      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.20.4-5535391095848960/linux-x64/Antigravity.tar.gz",
+      "sha256": "d6d762866a6f43bbdb3ff9e1595d53aa2e896de12be7f35bf57cdaab62b5cd60"
     },
     "aarch64-linux": {
-      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.19.6-6514342219874304/linux-arm/Antigravity.tar.gz",
-      "sha256": "fba4265d3646ad002b39774d5e06b36a826bd82e70c11297379258d4a06fe8a8"
+      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.20.4-5535391095848960/linux-arm/Antigravity.tar.gz",
+      "sha256": "cce1e718d5c7ead25eba8b399916b13d5cb84a90cbb6bc06d0235a4d83d71fd4"
     },
     "x86_64-darwin": {
-      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.19.6-6514342219874304/darwin-x64/Antigravity.zip",
-      "sha256": "9a96e8aa2e6f6ba8c4e137f44950690853e42f4a0ae0ec79b822113bd42ef30e"
+      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.20.4-5535391095848960/darwin-x64/Antigravity.zip",
+      "sha256": "958b845baae0d646dfe35260127982d4c66814c889b7f989bf1b15fd5e1cdad4"
     },
     "aarch64-darwin": {
-      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.19.6-6514342219874304/darwin-arm/Antigravity.zip",
-      "sha256": "0e0c3ade07d2c677eaa02a26b50df994bbeed8905dce583d164eff5ffc575530"
+      "url": "https://edgedl.me.gvt1.com/edgedl/release2/j0qc3/antigravity/stable/1.20.4-5535391095848960/darwin-arm/Antigravity.zip",
+      "sha256": "0ddb0e3f261b18e4fa2a670cffae9a2ecff359807f5b525b6b2c9a7f8b238b34"
     }
   }
 }

No auto update branch exists
There might already be an open PR for this update:
- antigravity: 1.19.6 -> 1.20.4
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/497122"