diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..49e88a5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.DS_Store
+
+/.zig-cache/
+/zig-out/
diff --git a/build.zig b/build.zig
new file mode 100644
index 0000000..8ec2a07
--- /dev/null
+++ b/build.zig
@@ -0,0 +1,70 @@
+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target   = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    // ---- deps
+    const dvui_dep = b.dependency("dvui", .{
+        .target = target,
+        .optimize = optimize,
+        .backend = .sdl,
+        .sdl3 = true,
+    });
+
+    // ---- logic library
+    const lib_mod = b.createModule(.{
+        .root_source_file = b.path("src/hncore/root.zig"),
+        .target   = target,
+        .optimize = optimize,
+    });
+
+    const lib = b.addLibrary(.{
+        .linkage = .static,
+        .name = "hncore",
+        .root_module = lib_mod,
+    });
+    b.installArtifact(lib);
+
+    // ---- executable
+    const exe_mod = b.createModule(.{
+        .root_source_file = b.path("src/heavens-net/main.zig"),
+        .target   = target,
+        .optimize = optimize,
+    });
+    exe_mod.addImport("hncore", lib_mod);
+    exe_mod.addImport("dvui", dvui_dep.module("dvui_sdl"));
+
+    const exe = b.addExecutable(.{
+        .name = "heavens-net",
+        .root_module = exe_mod,
+    });
+    b.installArtifact(exe);
+
+    // ---- running
+    const run_cmd = b.addRunArtifact(exe);
+    run_cmd.step.dependOn(b.getInstallStep());
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+
+    // ---- testing
+    const lib_unit_tests = b.addTest(.{
+        .root_module = lib_mod,
+    });
+    const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
+
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_lib_unit_tests.step);
+
+    // ---- document generation
+    const install_docs = b.addInstallDirectory(.{
+        .source_dir     = lib.getEmittedDocs(),
+        .install_dir    = .prefix,
+        .install_subdir = "docs",
+    });
+    const docs_step = b.step("docs", "Install docs into zig-out/docs");
+    docs_step.dependOn(&install_docs.step);
+}
diff --git a/build.zig.zon b/build.zig.zon
new file mode 100644
index 0000000..811bb1d
--- /dev/null
+++ b/build.zig.zon
@@ -0,0 +1,19 @@
+.{
+    .name = .heavens_net,
+    .version = "0.0.1",
+    .fingerprint = 0x5cbe403baf740fcb,
+    .minimum_zig_version = "0.15.0-dev.149+2b57f6b71",
+
+    .dependencies = .{
+        .dvui = .{
+            .url  = "https://github.com/david-vanderson/dvui/archive/9f446c8600b3385418c8926481076c335261f222.zip",
+            .hash = "dvui-0.2.0-AQFJmesqywBKCM6r9orR324EGhZvGsjhJw0ZHWcvwzyh",
+        },
+    },
+
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}
diff --git a/src/heavens-net/App.zig b/src/heavens-net/App.zig
new file mode 100644
index 0000000..e256cf8
--- /dev/null
+++ b/src/heavens-net/App.zig
@@ -0,0 +1,50 @@
+const std    = @import("std");
+const dvui   = @import("dvui");
+const hncore = @import("hncore");
+
+const win = @import("./win/root.zig");
+
+const Self = @This();
+
+alloc: std.mem.Allocator,
+today: win.today.Mock,
+
+pub fn init(alloc: std.mem.Allocator) !Self {
+    return Self {
+        .alloc = alloc,
+        .today = try win.today.Mock.init(alloc),
+    };
+}
+pub fn deinit(self: *Self) void {
+    self.today.deinit();
+}
+
+pub fn gui(self: *Self) !void {
+    // ---- menu
+    {
+        var root = try dvui.menu(@src(), .horizontal, .{ .background = true, .expand = .horizontal });
+        defer root.deinit();
+
+        if (try dvui.menuItemLabel(@src(), "File", .{ .submenu = true }, .{})) |r| {
+            var float = try dvui.floatingMenu(
+                @src(), .{.from = dvui.Rect.fromPoint(dvui.Point{ .x = r.x, .y = r.y + r.h })}, .{});
+            defer float.deinit();
+
+            if (try dvui.menuItemLabel(@src(), "Open", .{}, .{})) |_| {
+            }
+        }
+    }
+
+    // ---- project tabs
+    {
+        var tbox = try dvui.box(@src(), .vertical, .{
+            .expand = .both,
+            .background = true,
+            .color_fill = .{ .name = .fill_window },
+        });
+        defer tbox.deinit();
+    }
+
+    // ---- windows
+    try win.today.gui(&self.today);
+}
diff --git a/src/heavens-net/main.zig b/src/heavens-net/main.zig
new file mode 100644
index 0000000..9bce9d1
--- /dev/null
+++ b/src/heavens-net/main.zig
@@ -0,0 +1,49 @@
+const std    = @import("std");
+const dvui   = @import("dvui");
+const hncore = @import("hncore");
+
+const App = @import("./App.zig");
+
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer if (gpa.deinit() == .leak) {
+        @panic("memory leak detected");
+    };
+
+    var backend = try dvui.backend.initWindow(.{
+        .allocator = gpa.allocator(),
+        .size      = .{ .w = 800, .h = 600, },
+        .min_size  = .{ .w = 250, .h = 350, },
+        .vsync     = true,
+        .title     = "Heaven's Net",
+    });
+    defer backend.deinit();
+
+    var win = try dvui.Window.init(@src(), gpa.allocator(), backend.backend(), .{});
+    defer win.deinit();
+
+    var app = try App.init(gpa.allocator());
+    defer app.deinit();
+    while (true) {
+        try win.begin(
+            win.beginWait(backend.hasEvent()),
+        );
+
+        const quit = try backend.addAllEvents(&win);
+        if (quit) {
+            break;
+        }
+
+        try app.gui();
+
+        const end_micros = try win.end(.{});
+
+        backend.setCursor(win.cursorRequested());
+        backend.textInputRect(win.textInputRequested());
+        backend.renderPresent();
+
+        backend.waitEventTimeout(
+            win.waitTime(end_micros, null),
+        );
+    }
+}
diff --git a/src/heavens-net/win/root.zig b/src/heavens-net/win/root.zig
new file mode 100644
index 0000000..e53fb68
--- /dev/null
+++ b/src/heavens-net/win/root.zig
@@ -0,0 +1 @@
+pub const today = @import("./today.zig");
diff --git a/src/heavens-net/win/today.zig b/src/heavens-net/win/today.zig
new file mode 100644
index 0000000..5e87406
--- /dev/null
+++ b/src/heavens-net/win/today.zig
@@ -0,0 +1,88 @@
+const std  = @import("std");
+const dvui = @import("dvui");
+
+pub const Task = struct {
+    name: [:0]const u8,
+    mark: bool,
+};
+
+pub fn gui(ctx: anytype) !void {
+    var win = try dvui.floatingWindow(@src(), .{}, .{});
+    defer win.deinit();
+
+    try dvui.windowHeader("Today", "", null);
+
+    var scrollArea = try dvui.scrollArea(@src(), .{}, .{
+        .expand = .both,
+    });
+    defer scrollArea.deinit();
+
+    var reorder = try dvui.reorder(@src(), .{
+        .background = true,
+        .expand     = .both,
+    });
+    defer reorder.deinit();
+
+    var list = try dvui.box(@src(), .vertical, .{ .expand = .both, });
+    defer list.deinit();
+
+    const tasks = ctx.get_tasks();
+    for (0.., tasks) |idx, task| {
+        var reorderable = try reorder.reorderable(@src(), .{}, .{
+            .id_extra = idx,
+            .expand   = .horizontal,
+        });
+        defer reorderable.deinit();
+
+        var hbox = try dvui.box(@src(), .horizontal, .{
+            .expand     = .both,
+            .background = true,
+            .border     = dvui.Rect.all(1),
+        });
+        defer hbox.deinit();
+
+        var mark: bool = task.mark;
+        if (try dvui.checkbox(@src(), &mark, null, .{})) {
+            ctx.mark(idx, mark);
+        }
+
+        try dvui.label(@src(), "{s}", .{ task.name, }, .{});
+
+        _ = try dvui.ReorderWidget.draggable(@src(), .{ .reorderable = reorderable, }, .{
+            .expand      = .vertical,
+            .gravity_x   = 1.0,
+            .gravity_y   = 0.5,
+        });
+    }
+
+    try dvui.labelNoFmt(@src(), "no tasks anymore :)", .{ .gravity_x = 0.5 });
+}
+
+pub const Mock = struct {
+    const Self     = @This();
+    const TaskList = std.ArrayList(Task);
+
+    tasks: TaskList,
+
+    pub fn init(alloc: std.mem.Allocator) !Self {
+        var tasks = TaskList.init(alloc);
+        errdefer tasks.deinit();
+
+        try tasks.append(Task { .name = "helloworld", .mark = true, });
+        try tasks.append(Task { .name = "goodbye", .mark = false, });
+
+        return Mock {
+            .tasks = tasks,
+        };
+    }
+    pub fn deinit(self: *Self) void {
+        self.tasks.deinit();
+    }
+
+    fn mark(self: *Self, idx: usize, check: bool) void {
+        self.tasks.items[idx].mark = check;
+    }
+    fn get_tasks(self: *const Self) []const Task {
+        return self.tasks.items;
+    }
+};
diff --git a/src/hncore/root.zig b/src/hncore/root.zig
new file mode 100644
index 0000000..8eab4c3
--- /dev/null
+++ b/src/hncore/root.zig
@@ -0,0 +1,4 @@
+test {
+    @import("std").testing.refAllDecls(@This());
+}
+