From 099ff8a09302f6490e30c21cc3cd1bd2ef8f5947 Mon Sep 17 00:00:00 2001
From: rope <fredrik@nordhammer.it>
Date: Sat, 16 May 2026 12:10:05 +0100
Subject: [PATCH] code-server: patch Claude Code extension for Firefox CORS fix

Adds a NixOS activation script that patches the crossorigin attribute
onto the Claude Code extension's stylesheet link, fixing broken CSS in
Firefox due to stricter CORS handling than Chrome.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 services/code-server.nix | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/services/code-server.nix b/services/code-server.nix
index 3dea158..37f64e3 100644
--- a/services/code-server.nix
+++ b/services/code-server.nix
@@ -23,5 +23,16 @@
 
     # Make the claude CLI available in code-server's integrated terminal.
     environment.systemPackages = [ pkgs.claude-code ];
+
+    # Patch the Claude Code extension to add crossorigin="anonymous" to its
+    # stylesheet link — required for Firefox due to stricter CORS handling.
+    # Idempotent: sed won't match after the first apply.
+    system.activationScripts.claude-code-firefox-fix.text = ''
+      for f in /home/fred/.local/share/code-server/extensions/anthropic.claude-code-*/extension.js; do
+        [ -f "$f" ] && ${pkgs.gnused}/bin/sed -i \
+          's|<link href="${q}" rel="stylesheet">|<link href="${q}" rel="stylesheet" crossorigin="anonymous">|' \
+          "$f"
+      done
+    '';
   };
 }