feat(bluefin): add ydotool input automation (#1258)

Build ydotool v1.0.4 from source, ship its opt-in user daemon, and provide uinput module and uaccess rules for Wayland input injection.\n\nCloses #1217\n\nAssisted-by: GPT-5.6 Luna via GitHub Copilot\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: castrojo <castrojo@users.noreply.github.com>

Author: castrojo

docs/skills/add-package.md

@@ -173,3 +173,11 @@ junction. If a Shell extension needs the GTK3 introspection ABI, build with `-Dg
 (depends on `gnome-build-meta.bst:sdk/gtk+-3.bst`); upstream's VTE is GTK4-only. Push demo
 binaries and unversioned `.so` linker symlinks to the `devel` split so `bluefin-runtime`'s
 compose (which excludes `devel`) keeps only the `.typelib` + versioned `.so.N`.
+
+### User services that require `/dev/uinput` need both module loading and uaccess (2026-07-31)
+
+For a user-level daemon that opens `/dev/uinput`, installing the upstream unit
+alone is insufficient. Ship a modules-load entry for `uinput` and a udev rule
+with `TAG+="uaccess"` so the active desktop user receives device ACL access
+without manual `chmod` or group edits. Keep the user unit present but unenabled
+unless the feature is explicitly opt-in.

elements/bluefin/deps.bst

@@ -19,6 +19,7 @@ depends:
 
   - bluefin/gum.bst
   - bluefin/tealdeer.bst
+  - bluefin/ydotool.bst
   - bluefin/umotd.bst
 
   - bluefin/common.bst

elements/bluefin/ydotool.bst

@@ -0,0 +1,36 @@
+# ydotool provides input injection for Wayland sessions through /dev/uinput.
+# Keep the daemon unit disabled by default; users opt in with systemctl --user.
+kind: cmake
+
+sources:
+- kind: git_repo
+  url: github:ReimuNotMoe/ydotool.git
+  track: v1.0.4
+  ref: v1.0.4-0-g57ba7d0af525e82da2de0e275d169477f293b197
+
+build-depends:
+- freedesktop-sdk.bst:public-stacks/buildsystem-cmake.bst
+- freedesktop-sdk.bst:components/scdoc.bst
+- freedesktop-sdk.bst:components/systemd.bst
+
+depends:
+- freedesktop-sdk.bst:public-stacks/runtime-minimal.bst
+
+variables:
+  cmake-local: >-
+    -DCMAKE_INSTALL_MANDIR=%{mandir}
+
+config:
+  install-commands:
+    (>):
+    - |
+      install -Dm644 /dev/null "%{install-root}%{indep-libdir}/udev/rules.d/80-ydotool.rules"
+      cat > "%{install-root}%{indep-libdir}/udev/rules.d/80-ydotool.rules" <<'EOF'
+      KERNEL=="uinput", GROUP="input", MODE="0660", TAG+="uaccess", OPTIONS+="static_node=uinput"
+      EOF
+    - |
+      install -Dm644 /dev/null "%{install-root}%{indep-libdir}/modules-load.d/ydotool.conf"
+      printf '%s\n' uinput > "%{install-root}%{indep-libdir}/modules-load.d/ydotool.conf"
+    - |
+      install -d "%{install-root}%{indep-libdir}/systemd/user"
+      ln -s ydotool.service "%{install-root}%{indep-libdir}/systemd/user/ydotoold.service"