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README.md

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+# 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 domain socket (/tmp/fluxo.sock).
+
+## description
+
+the project follows a client-server architecture:
+- daemon: handles heavy lifting (polling cpu, memory, network) and stores state in memory.
+- client: a thin cli wrapper that connects to the daemon's socket to retrieve formatted json for waybar.
+
+this approach eliminates process spawning overhead and temporary file locking, resulting in near-zero cpu usage for custom modules.
+
+## modules
+
+- net: network interface speed (rx/tx mb/s)
+- cpu: global usage percentage and package temperature
+- mem: used/total ram in gigabytes
+- disk: disk usage for a specific mountpoint
+- pool: aggregate storage usage (e.g., btrfs)
+- vol: audio output volume and device management
+- mic: audio input volume and device management
+
+## dependencies
+
+### system
+- iproute2 (for network interface discovery)
+- wireplumber (for volume and mute status via wpctl)
+- pulseaudio (for device description and cycling via pactl)
+- lm-sensors (recommended for cpu temperature)
+
+### rust
+- cargo / rustc (edition 2024)
+
+## setup
+
+1. build the project:
+   $ cd fluxo-rs
+   $ cargo build --release
+
+2. start the daemon:
+   $ ./target/release/fluxo-rs daemon &
+
+3. configure waybar (config.jsonc):
+   "custom/cpu": {
+       "exec": "/path/to/fluxo-rs cpu",
+       "return-type": "json"
+   }
+
+## development
+
+### architecture
+- src/main.rs: entry point and cli argument parsing
+- src/daemon.rs: uds listener and background thread orchestration
+- src/ipc.rs: thin client socket communication
+- src/modules/: individual metric implementation logic
+- src/state.rs: shared in-memory data structures
+
+### adding a module
+1. define the state structure in state.rs
+2. implement the waybarmodule trait in src/modules/
+3. add the polling logic to the background thread in daemon.rs
+4. register the subcommand in main.rs
+
+### build and debug
+build for release:
+   $ cargo build --release
+
+run with debug logs:
+   $ RUST_LOG=debug ./target/release/fluxo-rs daemon