Switch to kitty terminal with ef-dream theme, emoji support

- Replace urxvt with kitty as default terminal
- Add ef-dream inspired color scheme to kitty
- Configure emoji font fallback with Noto Color Emoji
- Update xmonad.hs to use kitty for terminal and scratchpads
- Fix cmdtree to fetch from GitHub instead of broken git://jb55.com
- Remove urxvt.nix and alacritty config
- Add AGENTS.md for agentic coding tools

2 files changed, 32 insertions, 3 deletions

diff --git a/pkgs/cmdtree.nix b/pkgs/cmdtree.nix
index 1c991bb..20254b3 100644
--- a/pkgs/cmdtree.nix
+++ b/pkgs/cmdtree.nix
@@ -1,9 +1,10 @@
-{stdenv, fetchgit, xorg }:
+{stdenv, fetchFromGitHub, xorg }:
 
 stdenv.mkDerivation {
   name = "cmdtree";
-  src = fetchgit {
-    url = "git://jb55.com/cmdtree";
+  src = fetchFromGitHub {
+    owner = "jb55";
+    repo = "cmdtree";
     rev = "a7a1f07bfca23397d0d645cb7dbc3b7a63e521cb";
     sha256 = "sha256-QPUJUNiLzva+Mtbhic/yv6u2VIFdXkiZCtSz4eWSxzc=";
   };
diff --git a/pkgs/vdirsyncer-patch.nix b/pkgs/vdirsyncer-patch.nix
new file mode 100644
index 0000000..9265e21
--- /dev/null
+++ b/pkgs/vdirsyncer-patch.nix
@@ -0,0 +1,28 @@
+# Patch vdirsyncer to skip NotFoundError on missing items instead of failing.
+# This works around a Google CalDAV bug where recurring events with modified
+# instances are listed but cannot be fetched.
+# See: https://github.com/pimutils/vdirsyncer/issues/467
+{ lib, vdirsyncer }:
+
+vdirsyncer.overrideAttrs (oldAttrs: {
+  patches = (oldAttrs.patches or []) ++ [
+    (builtins.toFile "skip-notfound.patch" ''
+--- a/vdirsyncer/storage/dav.py
++++ b/vdirsyncer/storage/dav.py
+@@ -550,8 +550,11 @@ class DAVStorage(Storage):
+                 else:
+                     rv.append((href, Item(raw), etag))
+             for href in hrefs_left:
+-                raise exceptions.NotFoundError(href)
+-
++                dav_logger.warning(
++                    f"Skipping {href!r}, server listed but did not return it. "
++                    "This is often caused by corrupted recurring events in Google Calendar."
++                )
++
+             for href, item, etag in rv:
+                 yield href, item, etag
+ 
+'')
+  ];
+})