chore(niri): remove pyclipsync clipboard bridge

WeChat and QQ now use native Wayland, so the X11/Wayland clipboard bridge
is no longer needed. Remove the flake input, home-manager module wiring,
lock entries, and stale documentation reference.

Assisted-by: DeepSeek Harness (deepseek-flash)

AGENTS.md

@@ -140,7 +140,7 @@ repository, and cross-link them — no need to be told.
   change.
 - `~/codes/nix-secrets` — the private agenix store behind `secrets/` and the `mysecrets` input:
   ciphertext and recipient rules for the secrets declared here.
-- `wallpapers`, `nur-ryan4yin`, `pyclipsync`, `nu_scripts`, `mattpocock-skills`, `i-have-adhd` —
+- `wallpapers`, `nur-ryan4yin`, `nu_scripts`, `mattpocock-skills`, `i-have-adhd` —
   flake inputs from the user's own repositories; bump with `just upp <input>` after their source
   changes, do not edit them from here.
 

flake.lock

@@ -1117,26 +1117,6 @@
         "type": "github"
       }
     },
-    "pyclipsync": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1790136661,
-        "narHash": "sha256-2R03dOunHhpAIVzJObB4dVl66PwT0E8ilwe+zoPsk7I=",
-        "owner": "ryan4yin",
-        "repo": "pyclipsync",
-        "rev": "0b134383248faff0b2c8d3c9e8841322499ab7f8",
-        "type": "github"
-      },
-      "original": {
-        "owner": "ryan4yin",
-        "repo": "pyclipsync",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "agenix": "agenix",
@@ -1172,7 +1152,6 @@
         "ponytail": "ponytail",
         "pre-commit-hooks": "pre-commit-hooks",
         "preservation": "preservation",
-        "pyclipsync": "pyclipsync",
         "tuios": "tuios",
         "wallpapers": "wallpapers"
       }

flake.nix

@@ -224,12 +224,5 @@
       url = "github:ryan4yin/dsh-nu";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-
-    # Wayland <-> X11 clipboard sync daemon for xwayland-satellite (niri).
-    # Track main while the upstream fix for pkgs.system has no release tag.
-    pyclipsync = {
-      url = "github:ryan4yin/pyclipsync";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
   };
 }

home/linux/gui/niri/default.nix

@@ -2,18 +2,12 @@
   pkgs,
   config,
   lib,
-  pyclipsync,
   ...
 }@args:
 let
   cfg = config.modules.desktop.niri;
 in
 {
-  imports = [
-    # provides `services.pyclipsync.enable`
-    pyclipsync.homeModules.default
-  ];
-
   options.modules.desktop.niri = {
     enable = lib.mkEnableOption "niri compositor";
   };
@@ -57,13 +51,6 @@ in
           };
         };
 
-        # xwayland-satellite has no compositor-level clipboard bridging, so X11
-        # clients (WeChat/QQ, run via xwayland-satellite) and Wayland clients
-        # cannot see each other's clipboard. This daemon mirrors the X11
-        # CLIPBOARD and the Wayland data device both directions (see the
-        # pyclipsync repo for details).
-        services.pyclipsync.enable = true;
-
         # NOTE: this executable is used by greetd to start a wayland session when system boot up
         # with such a vendor-no-locking script, we can switch to another wayland compositor without modifying greetd's config in NixOS module
         home.file.".wayland-session" = {