WIP: version bump

Reviewed-on: #2

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fluxo-rs"
-version = "0.3.3"
+version = "0.4.0"
 edition = "2024"
 
 [dependencies]
@@ -12,7 +12,7 @@ serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
 sysinfo = "0.38.4"
 thiserror = "2.0"
-toml = "1.1.1"
+toml = "1.1.2"
 tracing = "0.1.44"
 tracing-subscriber = { version = "0.3.23", features = ["env-filter"] }
 maestro = { git = "https://github.com/qzed/pbpctrl", package = "maestro" }
@@ -22,6 +22,8 @@ tokio-util = { version = "0.7", features = ["codec", "time"] }
 futures = "0.3"
 libpulse-binding = "2.30"
 nix = { version = "0.31", features = ["net"] }
+notify = "8.2.0"
+zbus = "4"
 
 [dev-dependencies]
 

README.md

@@ -1,18 +1,16 @@
 # fluxo-rs
 
-fluxo-rs is a high-performance system metrics daemon and client designed specifically for Waybar. It replaces standard shell scripts with a compiled Rust binary that collects data via a background polling loop and serves it over a Unix socket.
+`fluxo-rs` is a high-performance system metrics daemon and client designed specifically for Waybar. It entirely replaces standard shell scripts with a compiled Rust binary that collects data via a background polling loop and serves it over a Unix socket. 
+
+With its **100% Native, Content-Based Event-Driven Architecture**, it consumes effectively 0% CPU while idle and signals Waybar to redraw *only* when the rendered UI text or icons physically change.
 
 ## Key Features
 
-- **Asynchronous Architecture**: Built on **Tokio**, the daemon handles concurrent IPC requests and background tasks with zero latency and minimal CPU overhead.
-- **Native Library Integrations**: 
-    - **Audio**: Direct `libpulse` integration for event-driven, instant volume and device updates.
-    - **Bluetooth**: Native `bluer` integration for robust device monitoring.
-    - **Pixel Buds Pro**: Custom native RPC implementation for real-time battery and ANC control.
-    - **Network**: Native `nix` and `/proc` inspection for high-speed interface monitoring.
-    - **Hyprland**: Direct IPC Unix socket communication for gamemode and animation status.
-- **Circuit Breaker (Failsafe)**: Automatically detects failing modules and enters a "Cool down" state to prevent resource waste and log spam.
-- **Multi-threaded Polling**: Decoupled subsystem threads ensure that a hang in one system (e.g., a slow GPU probe) never freezes your entire bar.
+- **100% Native Architecture**: Zero shell-outs or subprocesses. Uses `bluer` for Bluetooth, `libpulse-binding` for audio, `zbus` for MPRIS/DND, and `notify` for backlight.
+- **Content-Based Event Signaling**: `fluxo-rs` evaluates your custom configuration formats internally. It only sends a `SIGRTMIN+X` signal to Waybar if the resulting string or CSS class has actually changed, eliminating pointless re-renders from raw polling fluctuations.
+- **Zero-Latency Interactions**: Direct library bindings mean that when you change your volume or connect a Bluetooth device via the CLI, the daemon updates instantly.
+- **Circuit Breaker (Failsafe)**: Automatically detects failing modules and enters a "Cool down" state, preventing resource waste and log spam. Fallback caching keeps your bar looking clean even during brief failures.
+- **Multi-threaded Polling**: Decoupled Tokio subsystem threads ensure that a hang in one system (e.g., a slow GPU probe) never freezes your Waybar.
 
 ## Modules
 
@@ -24,37 +22,47 @@ fluxo-rs is a high-performance system metrics daemon and client designed specifi
 | `sys` | System load and uptime | `{uptime}`, `{load1}`, `{load5}`, `{load15}`, `{procs}` |
 | `disk` | Disk usage | `{mount}`, `{used}`, `{total}` |
 | `pool` | Btrfs aggregate storage | `{used}`, `{total}` |
+| `gpu` | GPU usage & thermals | `{usage}`, `{vram_used}`, `{vram_total}`, `{temp}` |
 | `vol` | Audio output (sink) | `{name}`, `{volume}`, `{icon}` |
 | `mic` | Audio input (source) | `{name}`, `{volume}`, `{icon}` |
 | `bt` | Bluetooth status & plugins | `{alias}`, `{mac}`, `{left}`, `{right}`, `{anc}` |
 | `power` | Battery and AC status | `{percentage}`, `{icon}` |
-| `game` | Hyprland status | active/inactive icons |
+| `game` | Hyprland Gamemode status | active/inactive strings |
+| `mpris` | Media Player status | `{artist}`, `{title}`, `{album}`, `{status_icon}` |
+| `backlight` | Display Brightness | `{percentage}`, `{icon}` |
+| `kbd` | Keyboard Layout | `{layout}` |
+| `dnd` | Do Not Disturb (SwayNC) | active/inactive strings |
 
 ## Setup
 
 1. **Build**: `cargo build --release`
-2. **Configure**: Create `~/.config/fluxo/config.toml` (see `example.config.toml`).
-3. **Daemon**: Start `fluxo-rs daemon`. It's recommended to run this as a systemd user service.
+2. **Configure**: Create `~/.config/fluxo/config.toml` (see `example.config.toml`). Ensure you map your `[signals]`.
+3. **Daemon**: Start `fluxo-rs daemon`. It is highly recommended to run this as a systemd user service.
 
 ## Waybar Configuration
 
-To achieve zero-latency updates, use **Waybar Signals**:
+To achieve zero-latency updates and zero-polling CPU usage, set `interval: 0` on your modules and rely entirely on **Waybar Signals** mapped in your `config.toml`:
 
 ```jsonc
-"custom/audio": {
-    "exec": "fluxo vol",
+"custom/volume": {
+    "exec": "fluxo-rs vol",
     "return-type": "json",
-    "interval": 5,
-    "signal": 8,
-    "on-click": "fluxo audio cycle sink && pkill -RTMIN+8 waybar"
+    "interval": 0,
+    "signal": 8, // Must match the value in config.toml [signals]
+    "on-click": "fluxo-rs vol mute",
+    "on-scroll-up": "fluxo-rs vol up 1",
+    "on-scroll-down": "fluxo-rs vol down 1",
+    "on-click-right": "fluxo-rs vol cycle"
 },
-"custom/bluetooth": {
-    "exec": "fluxo bt",
+"custom/bluetooth-audio": {
+    "format": "{}",
     "return-type": "json",
-    "interval": 5,
+    "exec": "fluxo-rs bt",
+    "on-click": "fluxo-rs bt menu",
+    "on-click-right": "fluxo-rs bt cycle_mode",
     "signal": 9,
-    "on-click": "fluxo bt menu && pkill -RTMIN+9 waybar",
-    "on-click-right": "fluxo bt cycle_mode && pkill -RTMIN+9 waybar"
+    "interval": 0,
+    "tooltip": true
 }
 ```
 

example.config.toml

@@ -1,46 +1,97 @@
 # Fluxo configuration example
+# Place this at ~/.config/fluxo/config.toml
+
+# Note: All tokens support standard alignment, padding, and precision specifiers dynamically.
+# For example, you can change {rx:>5.2} to {rx:<8.1} or {used} to {used:^4.0} directly here.
 
 [general]
-menu_command = "fuzzel --dmenu --prompt '{prompt}'"
+# command used for interactive menus (e.g., bluetooth device selection)
+# $FLUXO_PROMPT is securely injected to prevent shell escaping issues
+menu_command = "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\""
+# For Wofi use: menu_command = "wofi --show dmenu --prompt \"$FLUXO_PROMPT\""
+
+# Map modules to specific Waybar signals for zero-latency, event-driven UI updates.
+# These MUST match the `signal` configuration in your waybar config.jsonc
+[signals]
+network = 1
+cpu = 2
+memory = 3
+gpu = 4
+sys = 5
+disk = 6
+game = 7
+audio = 8
+bt = 9
+power = 10
+keyboard = 11
+mpris = 12
+backlight = 13
+dnd = 14
 
 [network]
-format = "{interface} ({ip}):  {rx:>5.2} MB/s   {tx:>5.2} MB/s"
+# tokens: {interface}, {ip}, {rx}, {tx}
+format = "{interface} ({ip}):  {rx:^4.1} MB/s   {tx:^4.1} MB/s"
 
 [cpu]
-format = "CPU: {usage:>4.1}% {temp:>4.1}C"
+# tokens: {usage}, {temp}, {model}
+format = "CPU: {usage:^4.1}% {temp:^4.1}C"
 
 [memory]
-format = "{used:>5.2}/{total:>5.2}GB"
+# tokens: {used}, {total}
+format = "MEM: {used:^4.1}/{total:^4.1}GB"
 
 [gpu]
+# tokens: {usage}, {vram_used}, {vram_total}, {temp}
 format_amd = "AMD: {usage:>3.0}% {vram_used:>4.1}/{vram_total:>4.1}GB {temp:>4.1}C"
 format_intel = "iGPU: {usage:>3.0}%"
 format_nvidia = "NV: {usage:>3.0}% {vram_used:>4.1}/{vram_total:>4.1}GB {temp:>4.1}C"
 
 [sys]
-format = "UP: {uptime} | LOAD: {load1:>4.2} {load5:>4.2} {load15:>4.2}"
+# tokens: {uptime}, {load1}, {load5}, {load15}, {procs}
+format = "UP: {uptime} LOAD: {load1:^3.1} "
 
 [disk]
-format = "{mount} {used:>5.1}/{total:>5.1}G"
+# tokens: {mount}, {used}, {total}
+format = "{mount} {used:^3.0}/{total:^3.0}G"
 
 [pool]
+# tokens: {used}, {total}
 format = "{used:>4.0}G / {total:>4.0}G"
 
 [power]
+# tokens: {percentage}, {icon}
 format = "{percentage:>3}%  {icon}"
 
-[bt]
-format_connected = "{alias} 󰂰"
-format_plugin = "{alias} [{left}|{right}] {anc} 󰂰"
-format_disconnected = "󰂯"
-format_disabled = "󰂲 Off"
-
 [audio]
+# tokens: {name}, {volume}, {icon}
 format_sink_unmuted = "{name} {volume:>3}% {icon}"
 format_sink_muted = "{name} {icon}"
 format_source_unmuted = "{name} {volume:>3}% {icon}"
 format_source_muted = "{name} {icon}"
 
+[bt]
+# tokens: {alias}, {mac}, {left}, {right}, {anc}
+format_plugin = "{alias} [{left}|{right}] {anc} 󰂰"
+format_connected = "󰂰 {alias}"
+format_disconnected = "󰂯 Disconnected"
+format_disabled = "󰂲 Off"
+
 [game]
 format_active = "<span size='large'>󰊖</span>"
 format_inactive = "<span size='large'></span>"
+
+[mpris]
+# tokens: {artist}, {title}, {album}, {status_icon}
+format = "{status_icon} {artist} - {title}"
+
+[backlight]
+# tokens: {percentage}, {icon}
+format = "{percentage:>3}% {icon}"
+
+[keyboard]
+# tokens: {layout}
+format = "{layout}"
+
+[dnd]
+format_dnd = "<span size='large'>󰂛</span>"
+format_normal = "<span size='large'>󰂚</span>"

src/config.rs

@@ -10,6 +10,8 @@ pub struct Config {
     #[serde(default)]
     pub general: GeneralConfig,
     #[serde(default)]
+    pub signals: SignalsConfig,
+    #[serde(default)]
     pub network: NetworkConfig,
     #[serde(default)]
     pub cpu: CpuConfig,
@@ -31,6 +33,14 @@ pub struct Config {
     pub bt: BtConfig,
     #[serde(default)]
     pub game: GameConfig,
+    #[serde(default)]
+    pub mpris: MprisConfig,
+    #[serde(default)]
+    pub backlight: BacklightConfig,
+    #[serde(default)]
+    pub keyboard: KeyboardConfig,
+    #[serde(default)]
+    pub dnd: DndConfig,
 }
 
 #[derive(Deserialize, Clone)]
@@ -41,11 +51,31 @@ pub struct GeneralConfig {
 impl Default for GeneralConfig {
     fn default() -> Self {
         Self {
-            menu_command: "fuzzel --dmenu --prompt '{prompt}'".to_string(),
+            menu_command: "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\"".to_string(),
         }
     }
 }
 
+#[allow(dead_code)]
+#[derive(Deserialize, Default, Clone)]
+pub struct SignalsConfig {
+    pub network: Option<i32>,
+    pub cpu: Option<i32>,
+    pub memory: Option<i32>,
+    pub gpu: Option<i32>,
+    pub sys: Option<i32>,
+    pub disk: Option<i32>,
+    pub pool: Option<i32>,
+    pub power: Option<i32>,
+    pub audio: Option<i32>,
+    pub bt: Option<i32>,
+    pub game: Option<i32>,
+    pub mpris: Option<i32>,
+    pub backlight: Option<i32>,
+    pub keyboard: Option<i32>,
+    pub dnd: Option<i32>,
+}
+
 #[derive(Deserialize, Clone)]
 pub struct NetworkConfig {
     pub format: String,
@@ -209,6 +239,60 @@ impl Default for GameConfig {
     }
 }
 
+#[derive(Deserialize, Clone)]
+pub struct MprisConfig {
+    pub format: String,
+}
+
+impl Default for MprisConfig {
+    fn default() -> Self {
+        Self {
+            format: "{status_icon} {artist} - {title}".to_string(),
+        }
+    }
+}
+
+#[derive(Deserialize, Clone)]
+pub struct BacklightConfig {
+    pub format: String,
+}
+
+impl Default for BacklightConfig {
+    fn default() -> Self {
+        Self {
+            format: "{percentage:>3}% {icon}".to_string(),
+        }
+    }
+}
+
+#[derive(Deserialize, Clone)]
+pub struct KeyboardConfig {
+    pub format: String,
+}
+
+impl Default for KeyboardConfig {
+    fn default() -> Self {
+        Self {
+            format: "{layout}".to_string(),
+        }
+    }
+}
+
+#[derive(Deserialize, Clone)]
+pub struct DndConfig {
+    pub format_dnd: String,
+    pub format_normal: String,
+}
+
+impl Default for DndConfig {
+    fn default() -> Self {
+        Self {
+            format_dnd: "<span size='large'>󰂛</span>".to_string(),
+            format_normal: "<span size='large'>󰂚</span>".to_string(),
+        }
+    }
+}
+
 static TOKEN_RE: LazyLock<Regex> =
     LazyLock::new(|| Regex::new(r"\{([a-zA-Z0-9_]+)(?::([<>\^])?(\d+)?(?:\.(\d+))?)?\}").unwrap());
 
@@ -284,6 +368,13 @@ impl Config {
             &self.bt.format_plugin,
             &["alias", "left", "right", "anc", "mac"],
         );
+        validate_format(
+            "mpris",
+            &self.mpris.format,
+            &["artist", "title", "album", "status_icon"],
+        );
+        validate_format("backlight", &self.backlight.format, &["percentage", "icon"]);
+        validate_format("keyboard", &self.keyboard.format, &["layout"]);
     }
 }
 
@@ -330,7 +421,7 @@ mod tests {
         let config = Config::default();
         assert_eq!(
             config.general.menu_command,
-            "fuzzel --dmenu --prompt '{prompt}'"
+            "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\""
         );
         assert!(config.cpu.format.contains("usage"));
         assert!(config.cpu.format.contains("temp"));
@@ -344,7 +435,7 @@ mod tests {
         // Should fallback to defaults without panicking
         assert_eq!(
             config.general.menu_command,
-            "fuzzel --dmenu --prompt '{prompt}'"
+            "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\""
         );
     }
 
@@ -371,7 +462,7 @@ mod tests {
         // Should fallback to defaults
         assert_eq!(
             config.general.menu_command,
-            "fuzzel --dmenu --prompt '{prompt}'"
+            "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\""
         );
     }
 
@@ -383,7 +474,7 @@ mod tests {
         let config = load_config(Some(tmpfile.path().to_path_buf()));
         assert_eq!(
             config.general.menu_command,
-            "fuzzel --dmenu --prompt '{prompt}'"
+            "fuzzel --dmenu --prompt \"$FLUXO_PROMPT\""
         );
         assert!(config.cpu.format.contains("usage"));
     }

src/daemon.rs

@@ -3,18 +3,24 @@ use crate::error::FluxoError;
 use crate::ipc::socket_path;
 use crate::modules::WaybarModule;
 use crate::modules::audio::AudioDaemon;
+use crate::modules::backlight::BacklightDaemon;
 use crate::modules::bt::BtDaemon;
+use crate::modules::dnd::DndDaemon;
 use crate::modules::hardware::HardwareDaemon;
+use crate::modules::keyboard::KeyboardDaemon;
+use crate::modules::mpris::MprisDaemon;
 use crate::modules::network::NetworkDaemon;
+use crate::signaler::WaybarSignaler;
 use crate::state::AppReceivers;
 use anyhow::Result;
+use notify::{Config as NotifyConfig, Event, RecommendedWatcher, RecursiveMode, Watcher};
 use std::collections::HashMap;
 use std::fs;
 use std::path::PathBuf;
 use std::sync::Arc;
 use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
 use tokio::net::UnixListener;
-use tokio::sync::{RwLock, watch};
+use tokio::sync::{RwLock, mpsc, watch};
 use tokio::time::{Duration, Instant, sleep};
 use tokio_util::sync::CancellationToken;
 use tracing::{debug, error, info, warn};
@@ -30,6 +36,18 @@ impl Drop for SocketGuard {
     }
 }
 
+fn get_config_path(custom_path: Option<PathBuf>) -> PathBuf {
+    custom_path.unwrap_or_else(|| {
+        let config_dir = std::env::var("XDG_CONFIG_HOME")
+            .map(PathBuf::from)
+            .unwrap_or_else(|_| {
+                let home = std::env::var("HOME").unwrap_or_else(|_| String::from("/"));
+                PathBuf::from(home).join(".config")
+            });
+        config_dir.join("fluxo/config.toml")
+    })
+}
+
 pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
     let sock_path = socket_path();
 
@@ -46,7 +64,13 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
     let (disks_tx, disks_rx) = watch::channel(Default::default());
     let (bt_tx, bt_rx) = watch::channel(Default::default());
     let (audio_tx, audio_rx) = watch::channel(Default::default());
+    let (mpris_tx, mpris_rx) = watch::channel(Default::default());
+    let (backlight_tx, backlight_rx) = watch::channel(Default::default());
+    let (keyboard_tx, keyboard_rx) = watch::channel(Default::default());
+    let (dnd_tx, dnd_rx) = watch::channel(Default::default());
     let health = Arc::new(RwLock::new(HashMap::new()));
+    let (bt_force_tx, mut bt_force_rx) = mpsc::channel(1);
+    let (audio_cmd_tx, audio_cmd_rx) = mpsc::channel(8);
 
     let receivers = AppReceivers {
         network: net_rx,
@@ -57,7 +81,13 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         disks: disks_rx,
         bluetooth: bt_rx,
         audio: audio_rx,
+        mpris: mpris_rx,
+        backlight: backlight_rx,
+        keyboard: keyboard_rx,
+        dnd: dnd_rx,
         health: Arc::clone(&health),
+        bt_force_poll: bt_force_tx,
+        audio_cmd_tx,
     };
 
     let listener = UnixListener::bind(&sock_path)?;
@@ -74,8 +104,56 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         token_clone.cancel();
     });
 
-    let config_path_clone = config_path.clone();
-    let config = Arc::new(RwLock::new(crate::config::load_config(config_path)));
+    let resolved_config_path = get_config_path(config_path.clone());
+    let config = Arc::new(RwLock::new(crate::config::load_config(config_path.clone())));
+
+    // 0. Config Watcher (Hot Reload)
+    let watcher_config = Arc::clone(&config);
+    let watcher_path = resolved_config_path.clone();
+    tokio::spawn(async move {
+        let (ev_tx, mut ev_rx) = mpsc::channel(1);
+        let mut watcher = RecommendedWatcher::new(
+            move |res: notify::Result<Event>| {
+                if let Ok(event) = res
+                    && (event.kind.is_modify() || event.kind.is_create())
+                {
+                    let _ = ev_tx.blocking_send(());
+                }
+            },
+            NotifyConfig::default(),
+        )
+        .unwrap();
+
+        if let Some(parent) = watcher_path.parent() {
+            let _ = watcher.watch(parent, RecursiveMode::NonRecursive);
+        }
+
+        info!("Config watcher started on {:?}", watcher_path);
+
+        loop {
+            tokio::select! {
+                _ = ev_rx.recv() => {
+                    // Debounce reloads
+                    sleep(Duration::from_millis(100)).await;
+                    while ev_rx.try_recv().is_ok() {}
+                    reload_config(&watcher_config, Some(watcher_path.clone())).await;
+                }
+            }
+        }
+    });
+
+    // 0.1 SIGHUP Handler
+    let hup_config = Arc::clone(&config);
+    let hup_path = resolved_config_path.clone();
+    tokio::spawn(async move {
+        use tokio::signal::unix::{SignalKind, signal};
+        let mut stream = signal(SignalKind::hangup()).unwrap();
+        loop {
+            stream.recv().await;
+            info!("Received SIGHUP, reloading config...");
+            reload_config(&hup_config, Some(hup_path.clone())).await;
+        }
+    });
 
     // 1. Network Task
     let token = cancel_token.clone();
@@ -84,14 +162,13 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         info!("Starting Network polling task");
         let mut daemon = NetworkDaemon::new();
         loop {
-            tokio::select! {
-                _ = token.cancelled() => break,
-                _ = sleep(Duration::from_secs(1)) => {
             if !is_in_backoff("net", &net_health).await {
                 let res = daemon.poll(&net_tx).await;
                 handle_poll_result("net", res, &net_health).await;
             }
-                }
+            tokio::select! {
+                _ = token.cancelled() => break,
+                _ = sleep(Duration::from_secs(1)) => {}
             }
         }
         info!("Network task shut down.");
@@ -104,13 +181,12 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         info!("Starting Fast Hardware polling task");
         let mut daemon = HardwareDaemon::new();
         loop {
-            tokio::select! {
-                _ = token.cancelled() => break,
-                _ = sleep(Duration::from_secs(1)) => {
             if !is_in_backoff("cpu", &hw_health).await {
                 daemon.poll_fast(&cpu_tx, &mem_tx, &sys_tx).await;
             }
-                }
+            tokio::select! {
+                _ = token.cancelled() => break,
+                _ = sleep(Duration::from_secs(1)) => {}
             }
         }
         info!("Fast Hardware task shut down.");
@@ -123,13 +199,12 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         info!("Starting Slow Hardware polling task");
         let mut daemon = HardwareDaemon::new();
         loop {
-            tokio::select! {
-                _ = token.cancelled() => break,
-                _ = sleep(Duration::from_secs(5)) => {
             if !is_in_backoff("gpu", &slow_health).await {
                 daemon.poll_slow(&gpu_tx, &disks_tx).await;
             }
-                }
+            tokio::select! {
+                _ = token.cancelled() => break,
+                _ = sleep(Duration::from_secs(5)) => {}
             }
         }
         info!("Slow Hardware task shut down.");
@@ -144,14 +219,14 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
         info!("Starting Bluetooth polling task");
         let mut daemon = BtDaemon::new();
         loop {
-            tokio::select! {
-                _ = token.cancelled() => break,
-                _ = sleep(Duration::from_secs(2)) => {
             if !is_in_backoff("bt", &bt_health).await {
                 let config = poll_config.read().await;
                 daemon.poll(&bt_tx, &poll_receivers, &config).await;
             }
-                }
+            tokio::select! {
+                _ = token.cancelled() => break,
+                _ = bt_force_rx.recv() => {},
+                _ = sleep(Duration::from_secs(2)) => {}
             }
         }
         info!("Bluetooth task shut down.");
@@ -159,7 +234,32 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
 
     // 5. Audio Thread (Event driven)
     let audio_daemon = AudioDaemon::new();
-    audio_daemon.start(&audio_tx);
+    audio_daemon.start(&audio_tx, audio_cmd_rx);
+
+    // 5.1 Backlight Thread (Event driven)
+    let backlight_daemon = BacklightDaemon::new();
+    backlight_daemon.start(backlight_tx);
+
+    // 5.2 Keyboard Thread (Event driven)
+    let keyboard_daemon = KeyboardDaemon::new();
+    keyboard_daemon.start(keyboard_tx);
+
+    // 5.3 DND Thread (Event driven)
+    let dnd_daemon = DndDaemon::new();
+    dnd_daemon.start(dnd_tx);
+
+    // 5.4 MPRIS Thread
+    let mpris_daemon = MprisDaemon::new();
+    mpris_daemon.start(mpris_tx);
+
+    // 6. Waybar Signaler Task
+    let signaler = WaybarSignaler::new();
+    let sig_config = Arc::clone(&config);
+    let sig_receivers = receivers.clone();
+    tokio::spawn(async move {
+        info!("Starting Waybar Signaler task");
+        signaler.run(sig_config, sig_receivers).await;
+    });
 
     info!("Fluxo daemon successfully bound to socket: {}", sock_path);
 
@@ -173,7 +273,7 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
                     Ok((mut stream, _)) => {
                         let state_clone = receivers.clone();
                         let config_clone = Arc::clone(&config);
-                        let cp_clone = config_path_clone.clone();
+                        let cp_clone = config_path.clone();
                         tokio::spawn(async move {
                             let (reader, mut writer) = stream.split();
                             let mut reader = BufReader::new(reader);
@@ -191,12 +291,8 @@ pub async fn run_daemon(config_path: Option<PathBuf>) -> Result<()> {
                             let parts: Vec<&str> = request.split_whitespace().collect();
                             if let Some(module_name) = parts.first() {
                                 if *module_name == "reload" {
-                                    info!("Reloading configuration...");
-                                    let new_config = crate::config::load_config(cp_clone);
-                                    let mut config_lock = config_clone.write().await;
-                                    *config_lock = new_config;
+                                    reload_config(&config_clone, cp_clone).await;
                                     let _ = writer.write_all(b"{\"text\":\"ok\"}").await;
-                                    info!("Configuration reloaded successfully.");
                                     return;
                                 }
 
@@ -281,6 +377,89 @@ async fn is_in_backoff(
     false
 }
 
+pub async fn reload_config(config_lock: &Arc<RwLock<Config>>, path: Option<PathBuf>) {
+    info!("Reloading configuration...");
+    let new_config = crate::config::load_config(path);
+    let mut lock = config_lock.write().await;
+    *lock = new_config;
+    info!("Configuration reloaded successfully.");
+}
+
+pub async fn evaluate_module_for_signaler(
+    module_name: &str,
+    state: &AppReceivers,
+    config: &Config,
+) -> Option<String> {
+    let result = match module_name {
+        "net" | "network" => {
+            crate::modules::network::NetworkModule
+                .run(config, state, &[])
+                .await
+        }
+        "cpu" => crate::modules::cpu::CpuModule.run(config, state, &[]).await,
+        "mem" | "memory" => {
+            crate::modules::memory::MemoryModule
+                .run(config, state, &[])
+                .await
+        }
+        "disk" => {
+            crate::modules::disk::DiskModule
+                .run(config, state, &["/"])
+                .await
+        }
+        "pool" | "btrfs" => {
+            crate::modules::btrfs::BtrfsModule
+                .run(config, state, &["btrfs"])
+                .await
+        }
+        "vol" | "audio" => {
+            crate::modules::audio::AudioModule
+                .run(config, state, &["sink", "show"])
+                .await
+        }
+        "mic" => {
+            crate::modules::audio::AudioModule
+                .run(config, state, &["source", "show"])
+                .await
+        }
+        "gpu" => crate::modules::gpu::GpuModule.run(config, state, &[]).await,
+        "sys" => crate::modules::sys::SysModule.run(config, state, &[]).await,
+        "bt" | "bluetooth" => {
+            crate::modules::bt::BtModule
+                .run(config, state, &["show"])
+                .await
+        }
+        "power" => {
+            crate::modules::power::PowerModule
+                .run(config, state, &[])
+                .await
+        }
+        "game" => {
+            crate::modules::game::GameModule
+                .run(config, state, &[])
+                .await
+        }
+        "backlight" => {
+            crate::modules::backlight::BacklightModule
+                .run(config, state, &[])
+                .await
+        }
+        "kbd" | "keyboard" => {
+            crate::modules::keyboard::KeyboardModule
+                .run(config, state, &[])
+                .await
+        }
+        "dnd" => crate::modules::dnd::DndModule.run(config, state, &[]).await,
+        "mpris" => {
+            crate::modules::mpris::MprisModule
+                .run(config, state, &[])
+                .await
+        }
+        _ => return None,
+    };
+    result.ok().and_then(|out| serde_json::to_string(&out).ok())
+}
+
 async fn handle_request(
     module_name: &str,
     args: &[&str],
@@ -288,20 +467,27 @@ async fn handle_request(
     config_lock: &Arc<RwLock<Config>>,
 ) -> String {
     // 1. Check Circuit Breaker status
-    let is_in_backoff = {
+    let (is_in_backoff, cached_output) = {
         let lock = state.health.read().await;
         if let Some(health) = lock.get(module_name) {
-            if let Some(until) = health.backoff_until {
+            let in_backoff = if let Some(until) = health.backoff_until {
                 Instant::now() < until
             } else {
                 false
-            }
+            };
+            (in_backoff, health.last_successful_output.clone())
         } else {
-            false
+            (false, None)
         }
     };
 
     if is_in_backoff {
+        if let Some(mut cached) = cached_output {
+            // Add a "warning" class to indicate stale data
+            let class = cached.class.unwrap_or_default();
+            cached.class = Some(format!("{} warning", class).trim().to_string());
+            return serde_json::to_string(&cached).unwrap_or_else(|_| "{}".to_string());
+        }
         return format!(
             "{{\"text\":\"\u{200B}Cooling down ({})\u{200B}\",\"class\":\"error\"}}",
             module_name
@@ -336,14 +522,14 @@ async fn handle_request(
                 .run(&config, state, args)
                 .await
         }
-        "vol" => {
+        "vol" | "audio" => {
             crate::modules::audio::AudioModule
-                .run(&config, state, &["sink", args.first().unwrap_or(&"show")])
+                .run(&config, state, args)
                 .await
         }
         "mic" => {
             crate::modules::audio::AudioModule
-                .run(&config, state, &["source", args.first().unwrap_or(&"show")])
+                .run(&config, state, args)
                 .await
         }
         "gpu" => {
@@ -367,20 +553,41 @@ async fn handle_request(
                 .run(&config, state, args)
                 .await
         }
+        "backlight" => {
+            crate::modules::backlight::BacklightModule
+                .run(&config, state, args)
+                .await
+        }
+        "kbd" | "keyboard" => {
+            crate::modules::keyboard::KeyboardModule
+                .run(&config, state, args)
+                .await
+        }
+        "dnd" => {
+            crate::modules::dnd::DndModule
+                .run(&config, state, args)
+                .await
+        }
+        "mpris" => {
+            crate::modules::mpris::MprisModule
+                .run(&config, state, args)
+                .await
+        }
         _ => {
             warn!("Received request for unknown module: '{}'", module_name);
             Err(FluxoError::Ipc(format!("Unknown module: {}", module_name)))
         }
     };
 
-    // 2. Update Health based on result
+    // 2. Update Health and Cache based on result
     {
         let mut lock = state.health.write().await;
         let health = lock.entry(module_name.to_string()).or_default();
         match &result {
-            Ok(_) => {
+            Ok(output) => {
                 health.consecutive_failures = 0;
                 health.backoff_until = None;
+                health.last_successful_output = Some(output.clone());
             }
             Err(e) => {
                 health.consecutive_failures += 1;
@@ -397,6 +604,13 @@ async fn handle_request(
     match result {
         Ok(output) => serde_json::to_string(&output).unwrap_or_else(|_| "{}".to_string()),
         Err(e) => {
+            // If we have a cached output, return it as fallback even on immediate error
+            if let Some(mut cached) = cached_output {
+                let class = cached.class.unwrap_or_default();
+                cached.class = Some(format!("{} warning", class).trim().to_string());
+                return serde_json::to_string(&cached).unwrap_or_else(|_| "{}".to_string());
+            }
+
             let error_msg = e.to_string();
             error!(module = module_name, error = %error_msg, "Module execution failed");
             let err_out = crate::output::WaybarOutput {

src/main.rs

@@ -4,6 +4,7 @@ mod error;
 mod ipc;
 mod modules;
 mod output;
+mod signaler;
 mod state;
 mod utils;
 
@@ -18,7 +19,14 @@ use tracing_subscriber::{EnvFilter, fmt, prelude::*};
 #[command(about = "A high-performance daemon/client for Waybar custom modules", long_about = None)]
 struct Cli {
     #[command(subcommand)]
-    command: Commands,
+    command: Option<Commands>,
+
+    /// Module name to query or interact with
+    module: Option<String>,
+
+    /// Arguments to pass to the module
+    #[arg(trailing_var_arg = true)]
+    args: Vec<String>,
 }
 
 #[derive(Subcommand)]
@@ -31,51 +39,6 @@ enum Commands {
     },
     /// Reload the daemon configuration
     Reload,
-    /// Network speed module
-    #[command(alias = "network")]
-    Net,
-    /// CPU usage and temp module
-    Cpu,
-    /// Memory usage module
-    #[command(alias = "memory")]
-    Mem,
-    /// Disk usage module (path defaults to /)
-    Disk {
-        #[arg(default_value = "/")]
-        path: String,
-    },
-    /// Storage pool aggregate module (e.g., btrfs)
-    #[command(alias = "btrfs")]
-    Pool {
-        #[arg(default_value = "btrfs")]
-        kind: String,
-    },
-    /// Audio volume (sink) control
-    Vol {
-        /// Cycle to the next available output device
-        #[arg(short, long)]
-        cycle: bool,
-    },
-    /// Microphone (source) control
-    Mic {
-        /// Cycle to the next available input device
-        #[arg(short, long)]
-        cycle: bool,
-    },
-    /// GPU usage, VRAM, and temp module
-    Gpu,
-    /// System load average and uptime
-    Sys,
-    /// Bluetooth audio device status
-    #[command(alias = "bluetooth")]
-    Bt {
-        #[arg(default_value = "show")]
-        action: String,
-    },
-    /// System power and battery status
-    Power,
-    /// Hyprland gamemode status
-    Game,
 }
 
 fn main() {
@@ -86,7 +49,8 @@ fn main() {
 
     let cli = Cli::parse();
 
-    match &cli.command {
+    if let Some(command) = &cli.command {
+        match command {
             Commands::Daemon { config } => {
                 info!("Starting Fluxo daemon...");
                 let rt = tokio::runtime::Builder::new_multi_thread()
@@ -106,29 +70,16 @@ fn main() {
                     process::exit(1);
                 }
             },
-        Commands::Net => handle_ipc_response(ipc::request_data("net", &[])),
-        Commands::Cpu => handle_ipc_response(ipc::request_data("cpu", &[])),
-        Commands::Mem => handle_ipc_response(ipc::request_data("mem", &[])),
-        Commands::Disk { path } => handle_ipc_response(ipc::request_data("disk", &[path])),
-        Commands::Pool { kind } => handle_ipc_response(ipc::request_data("pool", &[kind])),
-        Commands::Vol { cycle } => {
-            let action = if *cycle { "cycle" } else { "show" };
-            handle_ipc_response(ipc::request_data("vol", &[action]));
         }
-        Commands::Mic { cycle } => {
-            let action = if *cycle { "cycle" } else { "show" };
-            handle_ipc_response(ipc::request_data("mic", &[action]));
+        return;
     }
-        Commands::Gpu => handle_ipc_response(ipc::request_data("gpu", &[])),
-        Commands::Sys => handle_ipc_response(ipc::request_data("sys", &[])),
-        Commands::Bt { action } => {
-            if action == "menu" {
-                // Client-side execution of the menu
-                let config = config::load_config(None);
 
+    if let Some(module) = &cli.module {
+        // Special case for client-side Bluetooth menu which requires UI
+        if module == "bt" && cli.args.first().map(|s| s.as_str()) == Some("menu") {
+            let config = config::load_config(None);
             let mut items = Vec::new();
 
-                // If connected, show plugin modes and disconnect
             if let Ok(json_str) = ipc::request_data("bt", &["get_modes"])
                 && let Ok(val) = serde_json::from_str::<serde_json::Value>(&json_str)
                 && let Some(modes_str) = val.get("text").and_then(|t| t.as_str())
@@ -145,23 +96,13 @@ fn main() {
 
             items.push("--- Connect Device ---".to_string());
 
-                let devices_out = match std::process::Command::new("bluetoothctl")
-                    .args(["devices"])
-                    .output()
+            if let Ok(json_str) = ipc::request_data("bt", &["menu_data"])
+                && let Ok(val) = serde_json::from_str::<serde_json::Value>(&json_str)
+                && let Some(devices_str) = val.get("text").and_then(|t| t.as_str())
             {
-                    Ok(out) => out,
-                    Err(e) => {
-                        error!("bluetoothctl not found or failed: {}", e);
-                        return;
-                    }
-                };
-                let stdout = String::from_utf8_lossy(&devices_out.stdout);
-
-                for line in stdout.lines() {
-                    if line.starts_with("Device ") {
-                        let parts: Vec<&str> = line.splitn(3, ' ').collect();
-                        if parts.len() == 3 {
-                            items.push(format!("{} ({})", parts[2], parts[1]));
+                for line in devices_str.lines() {
+                    if !line.is_empty() {
+                        items.push(line.to_string());
                     }
                 }
             }
@@ -180,9 +121,7 @@ fn main() {
                         && let Some(mac_end) = selected.rfind(')')
                     {
                         let mac = &selected[mac_start + 1..mac_end];
-                            let _ = std::process::Command::new("bluetoothctl")
-                                .args(["connect", mac])
-                                .status();
+                        handle_ipc_response(ipc::request_data("bt", &["connect", mac]));
                     }
                 }
             } else {
@@ -190,10 +129,26 @@ fn main() {
             }
             return;
         }
-            handle_ipc_response(ipc::request_data("bt", &[action]));
-        }
-        Commands::Power => handle_ipc_response(ipc::request_data("power", &[])),
-        Commands::Game => handle_ipc_response(ipc::request_data("game", &[])),
+
+        // Generic module dispatch
+        // Translate module-specific shorthand targets
+        let (actual_module, actual_args) = if module == "vol" {
+            let mut new_args = vec!["sink".to_string()];
+            new_args.extend(cli.args.clone());
+            ("vol".to_string(), new_args)
+        } else if module == "mic" {
+            let mut new_args = vec!["source".to_string()];
+            new_args.extend(cli.args.clone());
+            ("vol".to_string(), new_args)
+        } else {
+            (module.clone(), cli.args.clone())
+        };
+
+        let args_ref: Vec<&str> = actual_args.iter().map(|s| s.as_str()).collect();
+        handle_ipc_response(ipc::request_data(&actual_module, &args_ref));
+    } else {
+        println!("Please specify a module or command. See --help.");
+        process::exit(1);
     }
 }
 

src/modules/audio.rs

@@ -9,9 +9,23 @@ use libpulse_binding::context::subscribe::{Facility, InterestMaskSet};
 use libpulse_binding::context::{Context, FlagSet as ContextFlag};
 use libpulse_binding::mainloop::threaded::Mainloop as ThreadedMainloop;
 use libpulse_binding::volume::Volume;
-use tokio::sync::watch;
+use tokio::sync::{mpsc, watch};
 use tracing::error;
 
+pub enum AudioCommand {
+    ChangeVolume {
+        is_sink: bool,
+        step_val: u32,
+        is_up: bool,
+    },
+    ToggleMute {
+        is_sink: bool,
+    },
+    CycleDevice {
+        is_sink: bool,
+    },
+}
+
 pub struct AudioDaemon;
 
 impl AudioDaemon {
@@ -19,7 +33,11 @@ impl AudioDaemon {
         Self
     }
 
-    pub fn start(&self, state_tx: &watch::Sender<AudioState>) {
+    pub fn start(
+        &self,
+        state_tx: &watch::Sender<AudioState>,
+        mut cmd_rx: mpsc::Receiver<AudioCommand>,
+    ) {
         let state_tx = state_tx.clone();
 
         std::thread::spawn(move || {
@@ -64,11 +82,12 @@ impl AudioDaemon {
             context.subscribe(interest, |_| {});
 
             let (tx, rx) = std::sync::mpsc::channel();
+            let tx_cb = tx.clone();
 
             context.set_subscribe_callback(Some(Box::new(move |facility, _operation, _index| {
                 match facility {
                     Some(Facility::Sink) | Some(Facility::Source) | Some(Facility::Server) => {
-                        let _ = tx.send(());
+                        let _ = tx_cb.send(());
                     }
                     _ => {}
                 }
@@ -76,14 +95,110 @@ impl AudioDaemon {
 
             mainloop.unlock();
 
-            // Background polling loop driven by events or a 2s fallback timeout
             loop {
-                let _ = rx.recv_timeout(Duration::from_secs(2));
-                {
+                if let Ok(cmd) = cmd_rx.try_recv() {
                     mainloop.lock();
-                    let _ = fetch_audio_data_sync(&mut context, &state_tx);
-                    mainloop.unlock();
+                    match cmd {
+                        AudioCommand::ChangeVolume {
+                            is_sink,
+                            step_val,
+                            is_up,
+                        } => {
+                            let current = state_tx.borrow().clone();
+                            let (name, mut vol, channels) = if is_sink {
+                                (
+                                    current.sink.name.clone(),
+                                    current.sink.volume,
+                                    current.sink.channels,
+                                )
+                            } else {
+                                (
+                                    current.source.name.clone(),
+                                    current.source.volume,
+                                    current.source.channels,
+                                )
+                            };
+
+                            if is_up {
+                                vol = vol.saturating_add(step_val as u8).min(150);
+                            } else {
+                                vol = vol.saturating_sub(step_val as u8);
                             }
+
+                            let pulse_vol = Volume(
+                                (vol as f64 / 100.0 * Volume::NORMAL.0 as f64).round() as u32,
+                            );
+                            let mut cvol = libpulse_binding::volume::ChannelVolumes::default();
+                            cvol.set(channels.max(1), pulse_vol);
+
+                            if is_sink {
+                                context
+                                    .introspect()
+                                    .set_sink_volume_by_name(&name, &cvol, None);
+                            } else {
+                                context
+                                    .introspect()
+                                    .set_source_volume_by_name(&name, &cvol, None);
+                            }
+                        }
+                        AudioCommand::ToggleMute { is_sink } => {
+                            let current = state_tx.borrow().clone();
+                            let (name, muted) = if is_sink {
+                                (current.sink.name.clone(), current.sink.muted)
+                            } else {
+                                (current.source.name.clone(), current.source.muted)
+                            };
+
+                            if is_sink {
+                                context
+                                    .introspect()
+                                    .set_sink_mute_by_name(&name, !muted, None);
+                            } else {
+                                context
+                                    .introspect()
+                                    .set_source_mute_by_name(&name, !muted, None);
+                            }
+                        }
+                        AudioCommand::CycleDevice { is_sink } => {
+                            let current = state_tx.borrow().clone();
+                            let current_name = if is_sink {
+                                current.sink.name.clone()
+                            } else {
+                                current.source.name.clone()
+                            };
+
+                            let devices = if is_sink {
+                                &current.available_sinks
+                            } else {
+                                &current.available_sources
+                            };
+                            if !devices.is_empty() {
+                                let current_idx =
+                                    devices.iter().position(|d| d == &current_name).unwrap_or(0);
+                                let next_idx = (current_idx + 1) % devices.len();
+                                let next_dev = &devices[next_idx];
+
+                                if is_sink {
+                                    context.set_default_sink(next_dev, |_| {});
+                                } else {
+                                    context.set_default_source(next_dev, |_| {});
+                                }
+                            }
+                        }
+                    }
+                    mainloop.unlock();
+                    let _ = tx.send(());
+                }
+
+                let _ = rx.recv_timeout(Duration::from_millis(50));
+                while rx.try_recv().is_ok() {}
+
+                mainloop.lock();
+
+                // Fetch data and update available sinks/sources
+                let _ = fetch_audio_data_sync(&mut context, &state_tx);
+
+                mainloop.unlock();
             }
         });
     }
@@ -116,9 +231,16 @@ fn fetch_audio_data_sync(
 
     let tx_sink = state_tx.clone();
     context.introspect().get_sink_info_list(move |res| {
-        if let ListResult::Item(item) = res {
         let mut current = tx_sink.borrow().clone();
-            // If this matches our default sink name, or if we don't have details for any yet
+        match res {
+            ListResult::Item(item) => {
+                if let Some(name) = item.name.as_ref() {
+                    let name_str = name.to_string();
+                    if !current.available_sinks.contains(&name_str) {
+                        current.available_sinks.push(name_str);
+                    }
+                }
+
                 let is_default = item
                     .name
                     .as_ref()
@@ -130,18 +252,38 @@ fn fetch_audio_data_sync(
                         .as_ref()
                         .map(|s| s.to_string())
                         .unwrap_or_default();
-                current.sink.volume =
-                    ((item.volume.avg().0 as f64 / Volume::NORMAL.0 as f64) * 100.0).round() as u8;
+                    current.sink.volume = ((item.volume.avg().0 as f64 / Volume::NORMAL.0 as f64)
+                        * 100.0)
+                        .round() as u8;
                     current.sink.muted = item.mute;
+                    current.sink.channels = item.volume.len();
+                }
                 let _ = tx_sink.send(current);
             }
+            ListResult::End => {
+                // Clear the list on End so it rebuilds fresh next time
+                current.available_sinks.clear();
+                let _ = tx_sink.send(current);
+            }
+            ListResult::Error => {}
         }
     });
 
     let tx_source = state_tx.clone();
     context.introspect().get_source_info_list(move |res| {
-        if let ListResult::Item(item) = res {
         let mut current = tx_source.borrow().clone();
+        match res {
+            ListResult::Item(item) => {
+                if let Some(name) = item.name.as_ref() {
+                    let name_str = name.to_string();
+                    // PulseAudio includes monitor sources, ignore them if we want to
+                    if !name_str.contains(".monitor")
+                        && !current.available_sources.contains(&name_str)
+                    {
+                        current.available_sources.push(name_str);
+                    }
+                }
+
                 let is_default = item
                     .name
                     .as_ref()
@@ -153,11 +295,20 @@ fn fetch_audio_data_sync(
                         .as_ref()
                         .map(|s| s.to_string())
                         .unwrap_or_default();
-                current.source.volume =
-                    ((item.volume.avg().0 as f64 / Volume::NORMAL.0 as f64) * 100.0).round() as u8;
+                    current.source.volume = ((item.volume.avg().0 as f64 / Volume::NORMAL.0 as f64)
+                        * 100.0)
+                        .round() as u8;
                     current.source.muted = item.mute;
+                    current.source.channels = item.volume.len();
+                }
                 let _ = tx_source.send(current);
             }
+            ListResult::End => {
+                // Clear the list on End so it rebuilds fresh next time
+                current.available_sources.clear();
+                let _ = tx_source.send(current);
+            }
+            ListResult::Error => {}
         }
     });
 
@@ -175,10 +326,23 @@ impl WaybarModule for AudioModule {
     ) -> Result<WaybarOutput> {
         let target_type = args.first().unwrap_or(&"sink");
         let action = args.get(1).unwrap_or(&"show");
+        let step = args.get(2).unwrap_or(&"5");
 
         match *action {
+            "up" => {
+                self.change_volume(state, target_type, step, true).await?;
+                Ok(WaybarOutput::default())
+            }
+            "down" => {
+                self.change_volume(state, target_type, step, false).await?;
+                Ok(WaybarOutput::default())
+            }
+            "mute" => {
+                self.toggle_mute(state, target_type).await?;
+                Ok(WaybarOutput::default())
+            }
             "cycle" => {
-                self.cycle_device(target_type).await?;
+                self.cycle_device(state, target_type).await?;
                 Ok(WaybarOutput::default())
             }
             "show" => self.get_status(config, state, target_type).await,
@@ -280,76 +444,41 @@ impl AudioModule {
         })
     }
 
-    async fn cycle_device(&self, target_type: &str) -> Result<()> {
-        // Keep using pactl for cycling for now as it's a rare action
-        // but we could also implement it natively later.
-        let set_cmd = if target_type == "sink" {
-            "set-default-sink"
-        } else {
-            "set-default-source"
-        };
-
-        // We need to find the "next" device.
-        // For simplicity, let's keep the CLI version for now or refactor later.
-        // The user asked for "step by step".
-
-        let list_cmd = if target_type == "sink" {
-            "sinks"
-        } else {
-            "sources"
-        };
-        let output = tokio::process::Command::new("pactl")
-            .args(["list", "short", list_cmd])
-            .output()
-            .await?;
-        let stdout = String::from_utf8_lossy(&output.stdout);
-
-        let devices: Vec<String> = stdout
-            .lines()
-            .filter_map(|l| {
-                let parts: Vec<&str> = l.split_whitespace().collect();
-                if parts.len() >= 2 {
-                    let name = parts[1].to_string();
-                    if target_type == "source" && name.contains(".monitor") {
-                        None
-                    } else {
-                        Some(name)
-                    }
-                } else {
-                    None
-                }
+    async fn change_volume(
+        &self,
+        state: &AppReceivers,
+        target_type: &str,
+        step: &str,
+        is_up: bool,
+    ) -> Result<()> {
+        let is_sink = target_type == "sink";
+        let step_val: u32 = step.parse().unwrap_or(5);
+        let _ = state
+            .audio_cmd_tx
+            .send(AudioCommand::ChangeVolume {
+                is_sink,
+                step_val,
+                is_up,
             })
-            .collect();
-
-        if devices.is_empty() {
-            return Ok(());
+            .await;
+        Ok(())
     }
 
-        let info_output = tokio::process::Command::new("pactl")
-            .args(["info"])
-            .output()
-            .await?;
-        let info_stdout = String::from_utf8_lossy(&info_output.stdout);
-        let search_key = if target_type == "sink" {
-            "Default Sink:"
-        } else {
-            "Default Source:"
-        };
-        let current_dev = info_stdout
-            .lines()
-            .find(|l| l.contains(search_key))
-            .and_then(|l| l.split(':').nth(1))
-            .map(|s| s.trim())
-            .unwrap_or("");
+    async fn toggle_mute(&self, state: &AppReceivers, target_type: &str) -> Result<()> {
+        let is_sink = target_type == "sink";
+        let _ = state
+            .audio_cmd_tx
+            .send(AudioCommand::ToggleMute { is_sink })
+            .await;
+        Ok(())
+    }
 
-        let current_index = devices.iter().position(|d| d == current_dev).unwrap_or(0);
-        let next_index = (current_index + 1) % devices.len();
-        let next_dev = &devices[next_index];
-
-        tokio::process::Command::new("pactl")
-            .args([set_cmd, next_dev])
-            .status()
-            .await?;
+    async fn cycle_device(&self, state: &AppReceivers, target_type: &str) -> Result<()> {
+        let is_sink = target_type == "sink";
+        let _ = state
+            .audio_cmd_tx
+            .send(AudioCommand::CycleDevice { is_sink })
+            .await;
         Ok(())
     }
 }

src/modules/backlight.rs

@@ -0,0 +1,154 @@
+use crate::config::Config;
+use crate::error::Result;
+use crate::modules::WaybarModule;
+use crate::output::WaybarOutput;
+use crate::state::{AppReceivers, BacklightState};
+use crate::utils::{TokenValue, format_template};
+use notify::{Config as NotifyConfig, Event, RecommendedWatcher, RecursiveMode, Watcher};
+use std::path::PathBuf;
+use std::sync::mpsc;
+use std::time::Duration;
+use tokio::sync::watch;
+use tracing::{error, info};
+
+pub struct BacklightModule;
+
+impl WaybarModule for BacklightModule {
+    async fn run(
+        &self,
+        config: &Config,
+        state: &AppReceivers,
+        _args: &[&str],
+    ) -> Result<WaybarOutput> {
+        let percentage = state.backlight.borrow().percentage;
+
+        let icon = if percentage < 30 {
+            "󰃞"
+        } else if percentage < 70 {
+            "󰃟"
+        } else {
+            "󰃠"
+        };
+
+        let text = format_template(
+            &config.backlight.format,
+            &[
+                ("percentage", TokenValue::Int(percentage as i64)),
+                ("icon", TokenValue::String(icon.to_string())),
+            ],
+        );
+
+        Ok(WaybarOutput {
+            text,
+            tooltip: Some(format!("Brightness: {}%", percentage)),
+            class: Some("normal".to_string()),
+            percentage: Some(percentage),
+        })
+    }
+}
+
+pub struct BacklightDaemon;
+
+impl BacklightDaemon {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn start(&self, tx: watch::Sender<BacklightState>) {
+        std::thread::spawn(move || {
+            let base_dir = PathBuf::from("/sys/class/backlight");
+            let mut device_dir = None;
+
+            if let Ok(entries) = std::fs::read_dir(&base_dir) {
+                for entry in entries.flatten() {
+                    let path = entry.path();
+                    if path.is_dir() {
+                        device_dir = Some(path);
+                        break;
+                    }
+                }
+            }
+
+            let Some(dir) = device_dir else {
+                error!("No backlight device found in /sys/class/backlight");
+                return;
+            };
+
+            info!("Monitoring backlight device: {:?}", dir);
+
+            let max_brightness_path = dir.join("max_brightness");
+            let brightness_path = dir.join("actual_brightness");
+            let brightness_path_fallback = dir.join("brightness");
+
+            let target_file = if brightness_path.exists() {
+                brightness_path
+            } else {
+                brightness_path_fallback
+            };
+
+            let get_percentage = || -> u8 {
+                let max: f64 = std::fs::read_to_string(&max_brightness_path)
+                    .unwrap_or_default()
+                    .trim()
+                    .parse()
+                    .unwrap_or(100.0);
+                let current: f64 = std::fs::read_to_string(&target_file)
+                    .unwrap_or_default()
+                    .trim()
+                    .parse()
+                    .unwrap_or(0.0);
+
+                if max > 0.0 {
+                    ((current / max) * 100.0).round() as u8
+                } else {
+                    0
+                }
+            };
+
+            // Initial poll
+            let _ = tx.send(BacklightState {
+                percentage: get_percentage(),
+            });
+
+            // Set up notify watcher
+            let (ev_tx, ev_rx) = mpsc::channel();
+            let mut watcher = RecommendedWatcher::new(
+                move |res: notify::Result<Event>| {
+                    if let Ok(event) = res
+                        && event.kind.is_modify()
+                    {
+                        let _ = ev_tx.send(());
+                    }
+                },
+                NotifyConfig::default(),
+            )
+            .unwrap();
+
+            if let Err(e) = watcher.watch(&target_file, RecursiveMode::NonRecursive) {
+                error!("Failed to watch backlight file: {}", e);
+                return;
+            }
+
+            loop {
+                // Block until an event occurs or a timeout to catch missed events
+                if ev_rx.recv_timeout(Duration::from_secs(5)).is_ok() {
+                    // Debounce rapid events
+                    std::thread::sleep(Duration::from_millis(50));
+                    while ev_rx.try_recv().is_ok() {}
+
+                    let _ = tx.send(BacklightState {
+                        percentage: get_percentage(),
+                    });
+                } else {
+                    // Timeout hit, poll just in case
+                    let current = get_percentage();
+                    if tx.borrow().percentage != current {
+                        let _ = tx.send(BacklightState {
+                            percentage: current,
+                        });
+                    }
+                }
+            }
+        });
+    }
+}

src/modules/bt/mod.rs

@@ -109,6 +109,17 @@ impl BtDaemon {
 static PLUGINS: LazyLock<Vec<Box<dyn BtPlugin>>> =
     LazyLock::new(|| vec![Box::new(PixelBudsPlugin)]);
 
+fn trigger_robust_poll(state: AppReceivers) {
+    tokio::spawn(async move {
+        // Poll immediately and then a few times over the next few seconds
+        // to catch slow state changes in bluez or plugins.
+        for delay in [200, 500, 1000, 2000, 3000] {
+            tokio::time::sleep(std::time::Duration::from_millis(delay)).await;
+            let _ = state.bt_force_poll.try_send(());
+        }
+    });
+}
+
 pub struct BtModule;
 
 impl WaybarModule for BtModule {
@@ -124,19 +135,57 @@ impl WaybarModule for BtModule {
         let bt_state = state.bluetooth.borrow().clone();
 
         match action.as_str() {
-            "disconnect" if bt_state.connected => {
-                let _ = tokio::process::Command::new("bluetoothctl")
-                    .args(["disconnect", &bt_state.device_address])
-                    .output()
-                    .await;
+            "connect" => {
+                if let Some(mac) = args.get(1) {
+                    if let Ok(session) = bluer::Session::new().await
+                        && let Ok(adapter) = session.default_adapter().await
+                        && let Ok(addr) = mac.parse::<bluer::Address>()
+                        && let Ok(device) = adapter.device(addr)
+                    {
+                        let _ = device.connect().await;
+                    }
+                    trigger_robust_poll(state.clone());
+                }
                 return Ok(WaybarOutput::default());
             }
+            "disconnect" if bt_state.connected => {
+                if let Ok(session) = bluer::Session::new().await
+                    && let Ok(adapter) = session.default_adapter().await
+                    && let Ok(addr) = bt_state.device_address.parse::<bluer::Address>()
+                    && let Ok(device) = adapter.device(addr)
+                {
+                    let _ = device.disconnect().await;
+                }
+                trigger_robust_poll(state.clone());
+                return Ok(WaybarOutput::default());
+            }
+            "menu_data" => {
+                let mut devs = Vec::new();
+                if let Ok(session) = bluer::Session::new().await
+                    && let Ok(adapter) = session.default_adapter().await
+                    && let Ok(addresses) = adapter.device_addresses().await
+                {
+                    for addr in addresses {
+                        if let Ok(device) = adapter.device(addr)
+                            && device.is_paired().await.unwrap_or(false)
+                        {
+                            let alias = device.alias().await.unwrap_or_else(|_| addr.to_string());
+                            devs.push(format!("{} ({})", alias, addr));
+                        }
+                    }
+                }
+                return Ok(WaybarOutput {
+                    text: devs.join("\n"),
+                    ..Default::default()
+                });
+            }
             "cycle_mode" if bt_state.connected => {
                 let plugin = PLUGINS
                     .iter()
                     .find(|p| p.can_handle(&bt_state.device_alias, &bt_state.device_address));
                 if let Some(p) = plugin {
                     p.cycle_mode(&bt_state.device_address, state).await?;
+                    trigger_robust_poll(state.clone());
                 }
                 return Ok(WaybarOutput::default());
             }
@@ -161,6 +210,7 @@ impl WaybarModule for BtModule {
                         .find(|p| p.can_handle(&bt_state.device_alias, &bt_state.device_address));
                     if let Some(p) = plugin {
                         p.set_mode(mode, &bt_state.device_address, state).await?;
+                        trigger_robust_poll(state.clone());
                     }
                 }
                 return Ok(WaybarOutput::default());

src/modules/disk.rs

@@ -18,6 +18,13 @@ impl WaybarModule for DiskModule {
 
         let disks = state.disks.borrow().clone();
 
+        if disks.is_empty() {
+            return Ok(WaybarOutput {
+                text: "Disk Loading...".to_string(),
+                ..Default::default()
+            });
+        }
+
         for disk in &disks {
             if disk.mount_point == *mountpoint {
                 let total = disk.total_bytes as f64;

src/modules/dnd.rs

@@ -0,0 +1,104 @@
+use crate::config::Config;
+use crate::error::Result;
+use crate::modules::WaybarModule;
+use crate::output::WaybarOutput;
+use crate::state::{AppReceivers, DndState};
+use futures::StreamExt;
+use tokio::sync::watch;
+use tracing::{debug, error, info};
+use zbus::{Connection, fdo::PropertiesProxy, proxy};
+
+pub struct DndModule;
+
+impl WaybarModule for DndModule {
+    async fn run(
+        &self,
+        config: &Config,
+        state: &AppReceivers,
+        _args: &[&str],
+    ) -> Result<WaybarOutput> {
+        let is_dnd = state.dnd.borrow().is_dnd;
+
+        if is_dnd {
+            Ok(WaybarOutput {
+                text: config.dnd.format_dnd.clone(),
+                tooltip: Some("Do Not Disturb: On".to_string()),
+                class: Some("dnd".to_string()),
+                percentage: None,
+            })
+        } else {
+            Ok(WaybarOutput {
+                text: config.dnd.format_normal.clone(),
+                tooltip: Some("Do Not Disturb: Off".to_string()),
+                class: Some("normal".to_string()),
+                percentage: None,
+            })
+        }
+    }
+}
+
+pub struct DndDaemon;
+
+#[proxy(
+    interface = "org.erikreider.swaync.control",
+    default_service = "org.erikreider.swaync.control",
+    default_path = "/org/erikreider/swaync/control"
+)]
+trait SwayncControl {
+    #[zbus(property)]
+    fn dnd(&self) -> zbus::Result<bool>;
+}
+
+impl DndDaemon {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn start(&self, tx: watch::Sender<DndState>) {
+        tokio::spawn(async move {
+            loop {
+                if let Err(e) = Self::listen_loop(&tx).await {
+                    error!("DND listener error: {}", e);
+                    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
+                }
+            }
+        });
+    }
+
+    async fn listen_loop(tx: &watch::Sender<DndState>) -> anyhow::Result<()> {
+        let connection = Connection::session().await?;
+
+        info!("Connected to D-Bus for DND monitoring");
+
+        // Try SwayNC first
+        if let Ok(proxy) = SwayncControlProxy::new(&connection).await {
+            debug!("Found SwayNC, using it for DND state.");
+
+            // Get initial state
+            if let Ok(is_dnd) = proxy.dnd().await {
+                let _ = tx.send(DndState { is_dnd });
+            }
+
+            // Monitor properties changed
+            if let Ok(props_proxy) = PropertiesProxy::builder(&connection)
+                .destination("org.erikreider.swaync.control")?
+                .path("/org/erikreider/swaync/control")?
+                .build()
+                .await
+            {
+                let mut stream = props_proxy.receive_properties_changed().await?;
+                while let Some(signal) = stream.next().await {
+                    let args = signal.args()?;
+                    if args.interface_name == "org.erikreider.swaync.control"
+                        && let Some(val) = args.changed_properties.get("dnd")
+                        && let Ok(is_dnd) = bool::try_from(val)
+                    {
+                        let _ = tx.send(DndState { is_dnd });
+                    }
+                }
+            }
+        }
+
+        Err(anyhow::anyhow!("DND stream ended or daemon not found"))
+    }
+}

src/modules/game.rs

@@ -3,8 +3,6 @@ use crate::error::Result;
 use crate::modules::WaybarModule;
 use crate::output::WaybarOutput;
 use crate::state::AppReceivers;
-use anyhow::anyhow;
-use std::env;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::UnixStream;
 
@@ -41,9 +39,7 @@ impl WaybarModule for GameModule {
 }
 
 async fn hyprland_ipc(cmd: &str) -> Result<String> {
-    let signature = env::var("HYPRLAND_INSTANCE_SIGNATURE")
-        .map_err(|_| anyhow!("HYPRLAND_INSTANCE_SIGNATURE not set"))?;
-    let path = format!("/tmp/hypr/{}/.socket.sock", signature);
+    let path = crate::utils::get_hyprland_socket(".socket.sock")?;
 
     let mut stream = UnixStream::connect(path).await?;
     stream.write_all(cmd.as_bytes()).await?;

src/modules/keyboard.rs

@@ -0,0 +1,104 @@
+use crate::config::Config;
+use crate::error::Result;
+use crate::modules::WaybarModule;
+use crate::output::WaybarOutput;
+use crate::state::{AppReceivers, KeyboardState};
+use crate::utils::{TokenValue, format_template};
+use anyhow::anyhow;
+use tokio::io::{AsyncBufReadExt, BufReader};
+use tokio::net::UnixStream;
+use tokio::sync::watch;
+use tracing::{error, info};
+
+pub struct KeyboardModule;
+
+impl WaybarModule for KeyboardModule {
+    async fn run(
+        &self,
+        config: &Config,
+        state: &AppReceivers,
+        _args: &[&str],
+    ) -> Result<WaybarOutput> {
+        let layout = state.keyboard.borrow().layout.clone();
+
+        if layout.is_empty() {
+            return Ok(WaybarOutput {
+                text: "Layout Loading...".to_string(),
+                tooltip: None,
+                class: Some("loading".to_string()),
+                percentage: None,
+            });
+        }
+
+        let text = format_template(
+            &config.keyboard.format,
+            &[("layout", TokenValue::String(layout.clone()))],
+        );
+
+        Ok(WaybarOutput {
+            text,
+            tooltip: Some(format!("Keyboard Layout: {}", layout)),
+            class: Some("normal".to_string()),
+            percentage: None,
+        })
+    }
+}
+
+pub struct KeyboardDaemon;
+
+impl KeyboardDaemon {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn start(&self, tx: watch::Sender<KeyboardState>) {
+        tokio::spawn(async move {
+            loop {
+                if let Err(e) = Self::listen_loop(&tx).await {
+                    error!("Keyboard layout listener error: {}", e);
+                    // Fallback to waiting before reconnecting to prevent tight loop
+                    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
+                }
+            }
+        });
+    }
+
+    async fn listen_loop(tx: &watch::Sender<KeyboardState>) -> anyhow::Result<()> {
+        let path = crate::utils::get_hyprland_socket(".socket2.sock")?;
+
+        info!("Connecting to Hyprland event socket: {:?}", path);
+        let stream = UnixStream::connect(path).await?;
+        let reader = BufReader::new(stream);
+        let mut lines = reader.lines();
+
+        // Fetch initial layout natively via hyprctl
+        if let Ok(output) = tokio::process::Command::new("hyprctl")
+            .args(["devices", "-j"])
+            .output()
+            .await
+            && let Ok(json) = serde_json::from_slice::<serde_json::Value>(&output.stdout)
+            && let Some(keyboards) = json.get("keyboards").and_then(|v| v.as_array())
+            && let Some(main_kb) = keyboards.last()
+        {
+            // The last active one is usually the main one
+            if let Some(layout) = main_kb.get("active_keymap").and_then(|v| v.as_str()) {
+                let _ = tx.send(KeyboardState {
+                    layout: layout.to_string(),
+                });
+            }
+        }
+
+        while let Ok(Some(line)) = lines.next_line().await {
+            if let Some(payload) = line.strip_prefix("activelayout>>") {
+                // payload format: keyboard_name,layout_name
+                let parts: Vec<&str> = payload.splitn(2, ',').collect();
+                if parts.len() == 2 {
+                    let layout = parts[1].to_string();
+                    let _ = tx.send(KeyboardState { layout });
+                }
+            }
+        }
+
+        Err(anyhow!("Hyprland socket closed or read error"))
+    }
+}

src/modules/mod.rs

@@ -1,12 +1,16 @@
 pub mod audio;
+pub mod backlight;
 pub mod bt;
 pub mod btrfs;
 pub mod cpu;
 pub mod disk;
+pub mod dnd;
 pub mod game;
 pub mod gpu;
 pub mod hardware;
+pub mod keyboard;
 pub mod memory;
+pub mod mpris;
 pub mod network;
 pub mod power;
 pub mod sys;

src/modules/mpris.rs

@@ -0,0 +1,207 @@
+use crate::config::Config;
+use crate::error::Result;
+use crate::modules::WaybarModule;
+use crate::output::WaybarOutput;
+use crate::state::{AppReceivers, MprisState};
+use crate::utils::{TokenValue, format_template};
+use tokio::sync::watch;
+use tracing::{debug, info};
+use zbus::{Connection, proxy};
+
+pub struct MprisModule;
+
+impl WaybarModule for MprisModule {
+    async fn run(
+        &self,
+        config: &Config,
+        state: &AppReceivers,
+        _args: &[&str],
+    ) -> Result<WaybarOutput> {
+        let mpris = state.mpris.borrow().clone();
+
+        if mpris.is_stopped && mpris.title.is_empty() {
+            return Ok(WaybarOutput {
+                text: String::new(),
+                tooltip: None,
+                class: Some("stopped".to_string()),
+                percentage: None,
+            });
+        }
+
+        let status_icon = if mpris.is_playing {
+            "󰏤"
+        } else if mpris.is_paused {
+            "󰐊"
+        } else {
+            "󰓛"
+        };
+
+        let class = if mpris.is_playing {
+            "playing"
+        } else if mpris.is_paused {
+            "paused"
+        } else {
+            "stopped"
+        };
+
+        let text = format_template(
+            &config.mpris.format,
+            &[
+                ("artist", TokenValue::String(mpris.artist.clone())),
+                ("title", TokenValue::String(mpris.title.clone())),
+                ("album", TokenValue::String(mpris.album.clone())),
+                ("status_icon", TokenValue::String(status_icon.to_string())),
+            ],
+        );
+
+        Ok(WaybarOutput {
+            text,
+            tooltip: Some(format!("{} - {}", mpris.artist, mpris.title)),
+            class: Some(class.to_string()),
+            percentage: None,
+        })
+    }
+}
+
+pub struct MprisDaemon;
+
+#[proxy(
+    interface = "org.freedesktop.DBus",
+    default_service = "org.freedesktop.DBus",
+    default_path = "/org/freedesktop/DBus"
+)]
+trait DBus {
+    fn list_names(&self) -> zbus::Result<Vec<String>>;
+}
+
+#[proxy(
+    interface = "org.mpris.MediaPlayer2.Player",
+    default_path = "/org/mpris/MediaPlayer2"
+)]
+trait MprisPlayer {
+    #[zbus(property)]
+    fn playback_status(&self) -> zbus::Result<String>;
+
+    #[zbus(property)]
+    fn metadata(
+        &self,
+    ) -> zbus::Result<std::collections::HashMap<String, zbus::zvariant::Value<'_>>>;
+}
+
+impl MprisDaemon {
+    pub fn new() -> Self {
+        Self
+    }
+
+    pub fn start(&self, tx: watch::Sender<MprisState>) {
+        tokio::spawn(async move {
+            loop {
+                if let Err(e) = Self::listen_loop(&tx).await {
+                    debug!("MPRIS listener ended or error: {}", e);
+                    tokio::time::sleep(tokio::time::Duration::from_secs(5)).await;
+                }
+            }
+        });
+    }
+
+    async fn listen_loop(tx: &watch::Sender<MprisState>) -> anyhow::Result<()> {
+        let connection = Connection::session().await?;
+
+        info!("Connected to D-Bus for MPRIS monitoring");
+
+        // Periodically poll for the active player and update the MPRIS state.
+        // This avoids complex dynamic signal tracking across ephemeral player instances.
+
+        let dbus_proxy = DBusProxy::new(&connection).await?;
+
+        loop {
+            let names = dbus_proxy.list_names().await?;
+            let mut active_player = None;
+
+            for name in names {
+                if name.starts_with("org.mpris.MediaPlayer2.") {
+                    active_player = Some(name);
+                    break; // Just grab the first active player for now
+                }
+            }
+
+            if let Some(player_name) = active_player {
+                if let Ok(player_proxy) = MprisPlayerProxy::builder(&connection)
+                    .destination(player_name.clone())?
+                    .build()
+                    .await
+                {
+                    let status = player_proxy.playback_status().await.unwrap_or_default();
+                    let metadata = player_proxy.metadata().await.unwrap_or_default();
+
+                    let is_playing = status == "Playing";
+                    let is_paused = status == "Paused";
+                    let is_stopped = status == "Stopped";
+
+                    let mut artist = String::new();
+                    let mut title = String::new();
+                    let mut album = String::new();
+
+                    if let Some(v) = metadata.get("xesam:artist") {
+                        if let Ok(arr) = zbus::zvariant::Array::try_from(v) {
+                            let mut artists = Vec::new();
+                            for i in 0..arr.len() {
+                                if let Ok(Some(s)) = arr.get::<&str>(i) {
+                                    artists.push(s.to_string());
+                                }
+                            }
+                            artist = artists.join(", ");
+                        } else if let Ok(a) = <&str>::try_from(v) {
+                            artist = a.to_string();
+                        }
+                    }
+                    if let Some(v) = metadata.get("xesam:title")
+                        && let Ok(t) = <&str>::try_from(v)
+                    {
+                        title = t.to_string();
+                    }
+                    if let Some(v) = metadata.get("xesam:album")
+                        && let Ok(a) = <&str>::try_from(v)
+                    {
+                        album = a.to_string();
+                    }
+
+                    // Only send if changed
+                    let current = tx.borrow();
+                    if current.is_playing != is_playing
+                        || current.is_paused != is_paused
+                        || current.is_stopped != is_stopped
+                        || current.title != title
+                        || current.artist != artist
+                        || current.album != album
+                    {
+                        drop(current); // Drop borrow before send
+                        let _ = tx.send(MprisState {
+                            is_playing,
+                            is_paused,
+                            is_stopped,
+                            artist,
+                            title,
+                            album,
+                        });
+                    }
+                }
+            } else {
+                let current = tx.borrow();
+                if !current.is_stopped || !current.title.is_empty() {
+                    drop(current);
+                    let _ = tx.send(MprisState {
+                        is_playing: false,
+                        is_paused: false,
+                        is_stopped: true,
+                        artist: String::new(),
+                        title: String::new(),
+                        album: String::new(),
+                    });
+                }
+            }
+
+            tokio::time::sleep(tokio::time::Duration::from_secs(2)).await;
+        }
+    }
+}

src/output.rs

@@ -1,6 +1,6 @@
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 
-#[derive(Serialize, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, Default)]
 pub struct WaybarOutput {
     pub text: String,
     #[serde(skip_serializing_if = "Option::is_none")]

src/signaler.rs

@@ -0,0 +1,156 @@
+use crate::config::Config;
+use crate::state::AppReceivers;
+use nix::libc;
+use nix::sys::signal::{Signal, kill};
+use nix::unistd::Pid;
+use std::collections::HashMap;
+use std::sync::Arc;
+use sysinfo::{ProcessesToUpdate, System};
+use tokio::sync::RwLock;
+use tokio::time::{Duration, Instant, sleep};
+use tracing::{debug, warn};
+
+pub struct WaybarSignaler {
+    cached_pid: Option<Pid>,
+    sys: System,
+    last_signal_sent: HashMap<i32, Instant>,
+}
+
+impl WaybarSignaler {
+    pub fn new() -> Self {
+        Self {
+            cached_pid: None,
+            sys: System::new(),
+            last_signal_sent: HashMap::new(),
+        }
+    }
+
+    fn find_waybar_pid(&mut self) -> Option<Pid> {
+        self.sys.refresh_processes(ProcessesToUpdate::All, true);
+        for (pid, process) in self.sys.processes() {
+            if process.name() == "waybar" {
+                return Some(Pid::from_raw(pid.as_u32() as i32));
+            }
+        }
+        None
+    }
+
+    fn send_signal(&mut self, signal_num: i32) {
+        if let Some(last) = self.last_signal_sent.get(&signal_num)
+            && last.elapsed() < Duration::from_millis(50)
+        {
+            return;
+        }
+
+        let mut valid_pid = false;
+        if let Some(pid) = self.cached_pid
+            && kill(pid, None).is_ok()
+        {
+            valid_pid = true;
+        }
+
+        if !valid_pid {
+            self.cached_pid = self.find_waybar_pid();
+        }
+
+        if let Some(pid) = self.cached_pid {
+            let rt_sig = match Signal::try_from(libc::SIGRTMIN() + signal_num) {
+                Ok(sig) => sig,
+                Err(_) => {
+                    unsafe {
+                        if libc::kill(pid.as_raw(), libc::SIGRTMIN() + signal_num) == 0 {
+                            debug!("Sent raw SIGRTMIN+{} to waybar (PID: {})", signal_num, pid);
+                            self.last_signal_sent.insert(signal_num, Instant::now());
+                        } else {
+                            warn!("Failed to send raw SIGRTMIN+{} to waybar", signal_num);
+                        }
+                    }
+                    return;
+                }
+            };
+
+            if let Err(e) = kill(pid, rt_sig) {
+                warn!("Failed to signal waybar: {}", e);
+                self.cached_pid = None;
+            } else {
+                debug!("Sent SIGRTMIN+{} to waybar (PID: {})", signal_num, pid);
+                self.last_signal_sent.insert(signal_num, Instant::now());
+            }
+        } else {
+            debug!("Waybar process not found, skipping signal.");
+        }
+    }
+
+    pub async fn run(mut self, config_lock: Arc<RwLock<Config>>, mut receivers: AppReceivers) {
+        let mut last_outputs: HashMap<&'static str, String> = HashMap::new();
+
+        loop {
+            let signals = config_lock.read().await.signals.clone();
+
+            macro_rules! check_and_signal {
+                ($module_name:expr, $signal_opt:expr) => {
+                    if let Some(sig) = $signal_opt {
+                        let config = config_lock.read().await;
+                        if let Some(out) = crate::daemon::evaluate_module_for_signaler(
+                            $module_name,
+                            &receivers,
+                            &config,
+                        )
+                        .await
+                        {
+                            if last_outputs.get($module_name) != Some(&out) {
+                                last_outputs.insert($module_name, out);
+                                self.send_signal(sig);
+                            }
+                        }
+                    }
+                };
+            }
+
+            tokio::select! {
+                res = receivers.network.changed(), if signals.network.is_some() => {
+                    if res.is_ok() { check_and_signal!("net", signals.network); }
+                }
+                res = receivers.cpu.changed(), if signals.cpu.is_some() => {
+                    if res.is_ok() { check_and_signal!("cpu", signals.cpu); }
+                }
+                res = receivers.memory.changed(), if signals.memory.is_some() => {
+                    if res.is_ok() { check_and_signal!("mem", signals.memory); }
+                }
+                res = receivers.sys.changed(), if signals.sys.is_some() => {
+                    if res.is_ok() { check_and_signal!("sys", signals.sys); }
+                }
+                res = receivers.gpu.changed(), if signals.gpu.is_some() => {
+                    if res.is_ok() { check_and_signal!("gpu", signals.gpu); }
+                }
+                res = receivers.disks.changed(), if signals.disk.is_some() => {
+                    if res.is_ok() { check_and_signal!("disk", signals.disk); }
+                }
+                res = receivers.bluetooth.changed(), if signals.bt.is_some() => {
+                    if res.is_ok() { check_and_signal!("bt", signals.bt); }
+                }
+                res = receivers.audio.changed(), if signals.audio.is_some() => {
+                    if res.is_ok() {
+                        check_and_signal!("vol", signals.audio);
+                        check_and_signal!("mic", signals.audio);
+                    }
+                }
+                res = receivers.backlight.changed(), if signals.backlight.is_some() => {
+                    if res.is_ok() { check_and_signal!("backlight", signals.backlight); }
+                }
+                res = receivers.keyboard.changed(), if signals.keyboard.is_some() => {
+                    if res.is_ok() { check_and_signal!("keyboard", signals.keyboard); }
+                }
+                res = receivers.dnd.changed(), if signals.dnd.is_some() => {
+                    if res.is_ok() { check_and_signal!("dnd", signals.dnd); }
+                }
+                res = receivers.mpris.changed(), if signals.mpris.is_some() => {
+                    if res.is_ok() { check_and_signal!("mpris", signals.mpris); }
+                }
+                _ = sleep(Duration::from_secs(5)) => {
+                    // loop and refresh config
+                }
+            }
+        }
+    }
+}

src/state.rs

@@ -1,6 +1,7 @@
+use crate::output::WaybarOutput;
 use std::collections::HashMap;
 use std::sync::Arc;
-use tokio::sync::{RwLock, watch};
+use tokio::sync::{RwLock, mpsc, watch};
 use tokio::time::Instant;
 
 #[derive(Clone)]
@@ -13,7 +14,13 @@ pub struct AppReceivers {
     pub disks: watch::Receiver<Vec<DiskInfo>>,
     pub bluetooth: watch::Receiver<BtState>,
     pub audio: watch::Receiver<AudioState>,
+    pub mpris: watch::Receiver<MprisState>,
+    pub backlight: watch::Receiver<BacklightState>,
+    pub keyboard: watch::Receiver<KeyboardState>,
+    pub dnd: watch::Receiver<DndState>,
     pub health: Arc<RwLock<HashMap<String, ModuleHealth>>>,
+    pub bt_force_poll: mpsc::Sender<()>,
+    pub audio_cmd_tx: mpsc::Sender<crate::modules::audio::AudioCommand>,
 }
 
 #[derive(Clone, Default)]
@@ -21,12 +28,15 @@ pub struct ModuleHealth {
     pub consecutive_failures: u32,
     pub last_failure: Option<Instant>,
     pub backoff_until: Option<Instant>,
+    pub last_successful_output: Option<WaybarOutput>,
 }
 
 #[derive(Default, Clone)]
 pub struct AudioState {
     pub sink: AudioDeviceInfo,
     pub source: AudioSourceInfo,
+    pub available_sinks: Vec<String>,
+    pub available_sources: Vec<String>,
 }
 
 #[derive(Default, Clone)]
@@ -35,6 +45,7 @@ pub struct AudioDeviceInfo {
     pub description: String,
     pub volume: u8,
     pub muted: bool,
+    pub channels: u8,
 }
 
 #[derive(Default, Clone)]
@@ -43,6 +54,7 @@ pub struct AudioSourceInfo {
     pub description: String,
     pub volume: u8,
     pub muted: bool,
+    pub channels: u8,
 }
 
 #[derive(Default, Clone)]
@@ -128,6 +140,31 @@ impl Default for GpuState {
     }
 }
 
+#[derive(Default, Clone)]
+pub struct DndState {
+    pub is_dnd: bool,
+}
+
+#[derive(Default, Clone)]
+pub struct KeyboardState {
+    pub layout: String,
+}
+
+#[derive(Default, Clone)]
+pub struct BacklightState {
+    pub percentage: u8,
+}
+
+#[derive(Default, Clone)]
+pub struct MprisState {
+    pub is_playing: bool,
+    pub is_paused: bool,
+    pub is_stopped: bool,
+    pub artist: String,
+    pub title: String,
+    pub album: String,
+}
+
 #[cfg(test)]
 pub struct MockState {
     pub receivers: AppReceivers,
@@ -140,6 +177,10 @@ pub struct MockState {
     _disks_tx: watch::Sender<Vec<DiskInfo>>,
     _bt_tx: watch::Sender<BtState>,
     _audio_tx: watch::Sender<AudioState>,
+    _mpris_tx: watch::Sender<MprisState>,
+    _backlight_tx: watch::Sender<BacklightState>,
+    _keyboard_tx: watch::Sender<KeyboardState>,
+    _dnd_tx: watch::Sender<DndState>,
 }
 
 #[cfg(test)]
@@ -153,6 +194,10 @@ pub struct AppState {
     pub disks: Vec<DiskInfo>,
     pub bluetooth: BtState,
     pub audio: AudioState,
+    pub mpris: MprisState,
+    pub backlight: BacklightState,
+    pub keyboard: KeyboardState,
+    pub dnd: DndState,
     pub health: HashMap<String, ModuleHealth>,
 }
 
@@ -166,6 +211,12 @@ pub fn mock_state(state: AppState) -> MockState {
     let (disks_tx, disks_rx) = watch::channel(state.disks);
     let (bt_tx, bt_rx) = watch::channel(state.bluetooth);
     let (audio_tx, audio_rx) = watch::channel(state.audio);
+    let (mpris_tx, mpris_rx) = watch::channel(state.mpris);
+    let (backlight_tx, backlight_rx) = watch::channel(state.backlight);
+    let (keyboard_tx, keyboard_rx) = watch::channel(state.keyboard);
+    let (dnd_tx, dnd_rx) = watch::channel(state.dnd);
+    let (bt_force_tx, _) = mpsc::channel(1);
+    let (audio_cmd_tx, _) = mpsc::channel(1);
 
     MockState {
         receivers: AppReceivers {
@@ -177,7 +228,13 @@ pub fn mock_state(state: AppState) -> MockState {
             disks: disks_rx,
             bluetooth: bt_rx,
             audio: audio_rx,
+            mpris: mpris_rx,
+            backlight: backlight_rx,
+            keyboard: keyboard_rx,
+            dnd: dnd_rx,
             health: Arc::new(RwLock::new(state.health)),
+            bt_force_poll: bt_force_tx,
+            audio_cmd_tx,
         },
         _net_tx: net_tx,
         _cpu_tx: cpu_tx,
@@ -187,5 +244,9 @@ pub fn mock_state(state: AppState) -> MockState {
         _disks_tx: disks_tx,
         _bt_tx: bt_tx,
         _audio_tx: audio_tx,
+        _mpris_tx: mpris_tx,
+        _backlight_tx: backlight_tx,
+        _keyboard_tx: keyboard_tx,
+        _dnd_tx: dnd_tx,
     }
 }

src/utils.rs

@@ -3,17 +3,21 @@ use std::io::Write;
 use std::process::{Command, Stdio};
 
 pub fn show_menu(prompt: &str, items: &[String], menu_cmd: &str) -> Result<String> {
+    // Backward compatibility for {prompt}, but environment variable is safer
     let cmd_str = menu_cmd.replace("{prompt}", prompt);
     let mut child = Command::new("sh")
         .arg("-c")
         .arg(&cmd_str)
+        .env("FLUXO_PROMPT", prompt) // Safer shell injection
         .stdin(Stdio::piped())
         .stdout(Stdio::piped())
+        .stderr(Stdio::null()) // Suppress GTK/Wayland warnings from tools like wofi
         .spawn()
         .context("Failed to spawn menu command")?;
 
     if let Some(mut stdin) = child.stdin.take() {
-        let input = items.join("\n");
+        let mut input = items.join("\n");
+        input.push('\n'); // Ensure trailing newline for wofi/rofi
         stdin
             .write_all(input.as_bytes())
             .context("Failed to write to menu stdin")?;
@@ -33,6 +37,36 @@ pub fn show_menu(prompt: &str, items: &[String], menu_cmd: &str) -> Result<Strin
     Ok(selected)
 }
 
+pub fn get_hyprland_socket(socket_name: &str) -> Result<std::path::PathBuf> {
+    let signature = std::env::var("HYPRLAND_INSTANCE_SIGNATURE")
+        .context("HYPRLAND_INSTANCE_SIGNATURE not set")?;
+
+    // Try XDG_RUNTIME_DIR first (usually /run/user/1000)
+    if let Ok(runtime_dir) = std::env::var("XDG_RUNTIME_DIR") {
+        let path = std::path::PathBuf::from(runtime_dir)
+            .join("hypr")
+            .join(&signature)
+            .join(socket_name);
+        if path.exists() {
+            return Ok(path);
+        }
+    }
+
+    // Fallback to /tmp
+    let path = std::path::PathBuf::from("/tmp/hypr")
+        .join(&signature)
+        .join(socket_name);
+
+    if path.exists() {
+        Ok(path)
+    } else {
+        Err(anyhow::anyhow!(
+            "Hyprland socket {} not found in runtime dir or /tmp",
+            socket_name
+        ))
+    }
+}
+
 use regex::Regex;
 use std::sync::LazyLock;