diff --git a/dotfiles/takamaki/niri.kdl b/dotfiles/takamaki/niri.kdl
index c9bcf59..ea3ff01 100644
--- a/dotfiles/takamaki/niri.kdl
+++ b/dotfiles/takamaki/niri.kdl
@@ -61,6 +61,7 @@ layout {
     default-column-width
     center-focused-column "never"
     always-center-single-column
+    empty-workspace-above-first
 }
 cursor {
     xcursor-theme "Bibata-Modern-Ice"
@@ -107,6 +108,9 @@ binds {
     Mod+Shift+WheelScrollUp { focus-workspace-up; }
     Mod+Shift+WheelScrollDown { focus-workspace-down; }
 
+    Mod+equal { set-column-width "+2%"; }
+    Mod+minus { set-column-width "-2%"; }
+
     Mod+Shift+Up { move-window-to-workspace-up; }
     Mod+Shift+Down { move-window-to-workspace-down; }
     Mod+Shift+Left { move-column-left; }
@@ -144,6 +148,7 @@ window-rule { // Steam windows float (excluding main window)
     exclude title=r#"^notificationtoasts_\d+_desktop$"#
     default-window-height { proportion 0.5; }
     open-floating true
+    open-focused true
 }
 window-rule {
     match app-id="steam" title=r#"^notificationtoasts_\d+_desktop$"#
diff --git a/flake.lock b/flake.lock
index 2143d3f..8af0de1 100644
--- a/flake.lock
+++ b/flake.lock
@@ -251,6 +251,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-26-05": {
+      "locked": {
+        "lastModified": 1788297115,
+        "narHash": "sha256-Z+vUNbfd2FIKkWOTkcT7RYlh3oFCnig/d2eXD1SWf2E=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "a3116115851d68b8952a2a4221cc25a84e56b532",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-26.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-lib": {
       "locked": {
         "lastModified": 1785031560,
@@ -319,6 +335,7 @@
         "home-manager": "home-manager",
         "import-tree": "import-tree",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-26-05": "nixpkgs-26-05",
         "noctalia": "noctalia",
         "spicetify": "spicetify",
         "stylix": "stylix"
diff --git a/flake.nix b/flake.nix
index 92eee91..3606d32 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,6 +4,8 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
 
+    nixpkgs-26-05.url = "github:nixos/nixpkgs/nixos-26.05";
+
     flake-parts.url = "github:hercules-ci/flake-parts";
 
     import-tree.url = "github:vic/import-tree";
diff --git a/modules/dev-shells/biri.nix b/modules/dev-shells/biri.nix
new file mode 100644
index 0000000..4ad7ea2
--- /dev/null
+++ b/modules/dev-shells/biri.nix
@@ -0,0 +1,67 @@
+{ inputs, self, ... }: {
+  perSystem = { system, ... }: let
+    pkgs = import inputs.nixpkgs {
+      inherit system;
+      overlays = [
+        (final: prev: {
+          libdisplay-info = inputs.nixpkgs-26-05.legacyPackages.${system}.libdisplay-info;
+        })
+      ];
+      config = { };
+    };
+  in {
+    devShells.niri = with pkgs; mkShell {
+      name = "niri-dev-shell";
+
+      strictDeps = true;
+      
+      buildInputs = with pkgs; [
+        llvmPackages_latest.llvm
+        glib
+        libsysprof-capture
+        pcre2
+        libffi
+        util-linux
+        selinuxPackages.libselinux
+        pipewire
+        systemd
+        seatd
+        pango
+        libdisplay-info
+        libinput
+        libxkbcommon
+        libglvnd
+        libgbm
+        wayland
+        dbus
+      ];
+
+      nativeBuildInputs = [
+        rustc
+        cargo
+        pkg-config
+        rustPlatform.bindgenHook
+      ];
+
+      env = {
+        # Force linking with libEGL and libwayland-client
+        # so they can be discovered by `dlopen()`
+        RUSTFLAGS = toString (
+          map (arg: "-C link-arg=" + arg) [
+            "-Wl,--push-state,--no-as-needed"
+            "-lEGL"
+            "-lwayland-client"
+            "-Wl,--pop-state"
+          ]
+        );
+
+        # Upstream recommends setting the commit hash manually when in a
+        # build environment where the Git repository is unavailable.
+        # See https://github.com/niri-wm/niri/wiki/Packaging-niri#version-string
+        NIRI_BUILD_COMMIT = "barrulus/biri";
+      };
+
+      RUST_SRC_PATH = "${pkgs.rustPlatform.rustLibSrc}";
+    };
+  };
+}
\ No newline at end of file
diff --git a/modules/dev-shells/rust.nix b/modules/dev-shells/rust.nix
new file mode 100644
index 0000000..3e31af7
--- /dev/null
+++ b/modules/dev-shells/rust.nix
@@ -0,0 +1,17 @@
+{ inputs, self, ... }: {
+  perSystem = { pkgs, ... }: {
+    devShells.rust = with pkgs; mkShell {
+      name = "rust-dev-shell";
+      strictDeps = true;
+
+      nativeBuildInputs = [
+        rustc
+        cargo
+        pkg-config
+        rustPlatform.bindgenHook
+      ];
+
+      RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
+    };
+  };
+}
\ No newline at end of file
diff --git a/modules/hosts/takamaki/takamaki.nix b/modules/hosts/takamaki/takamaki.nix
index 9c21919..528361a 100644
--- a/modules/hosts/takamaki/takamaki.nix
+++ b/modules/hosts/takamaki/takamaki.nix
@@ -17,11 +17,25 @@
     ];
 
     info = {
-      rootPath = "/home/grey/flake";
+      userName = "grey";
       hostName = "takamaki";
+      rootPath = "/home/grey/flake";
       stateVersion = "26.11";
     };
 
+    programs.sftpman = {
+      enable = true;
+      mounts = {
+        sakamoto = {
+          host = "sakamoto";
+          mountDestPath = "/home/grey/mounts/ssh/sakamoto";
+          mountPoint = "/";
+          sshKey = "/home/grey/.ssh/id_sakamoto";
+          user = "grey";
+        };
+      };
+    };
+
     services.gpg-agent = {
       enable = true;
       extraConfig = ''
@@ -71,6 +85,7 @@
         extraPackages = with pkgs; [
           nix-init
           github-desktop
+          self.packages.${stdenv.hostPlatform.system}.biri
         ];
 
         shellScripts = let 
diff --git a/modules/packages/biri.nix b/modules/packages/biri.nix
new file mode 100644
index 0000000..82d1929
--- /dev/null
+++ b/modules/packages/biri.nix
@@ -0,0 +1,40 @@
+{ inputs, self, ... }: {
+  perSystem = { pkgs, ... }: {
+    packages = let
+      finalAttrs = rec {
+        name = "${pname}-${version}";
+        pname = "biri";
+        version = "26.04";
+
+        src = pkgs.fetchFromGitHub {
+          owner = "barrulus";
+          repo = pname;
+          rev = "82efb3c0fb688a0c738d15517a2e6a44ed7ca703";
+          hash = "sha256-Gg4UHnugGnVZifxfKRUnxt3T+DSPgUvHEfE9tflA5zM=";
+        };
+
+        cargoHash = "sha256-aNovCzrTtmqTO33YtZap47npdN73zXC1bap5q5dZvZk=";
+      };
+
+      overrideAttrs = with pkgs; prev: {
+        rustPlatform = prev.rustPlatform // {
+          buildRustPackage = args: pkgs.rustPlatform.buildRustPackage (args finalAttrs // finalAttrs);
+        };
+      };
+    in {
+      biri = pkgs.niri.override (prev: overrideAttrs prev);
+
+      biri-unwrapped = pkgs.niri.override (prev: (overrideAttrs prev) // {
+        rustPlatform = (overrideAttrs prev).rustPlatform // {
+          buildRustPackage = args: pkgs.rustPlatform.buildRustPackage (args finalAttrs // {
+            postInstall = ''
+              install -Dm0644 README.md resources/default-config.kdl -t $doc/share/doc/niri
+              mv docs/wiki $doc/share/doc/niri/wiki
+              cp -r . $out
+            '';
+          });
+        };
+      });
+    };
+  };
+}
\ No newline at end of file