diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index b07161ff..6588d221 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -3611,6 +3611,7 @@ dependencies = [
  "psysonic-analysis",
  "psysonic-audio",
  "psysonic-core",
+ "psysonic-integration",
  "psysonic-syncfs",
  "reqwest",
  "ringbuf",
@@ -3695,6 +3696,22 @@ dependencies = [
  "tauri",
 ]
 
+[[package]]
+name = "psysonic-integration"
+version = "1.46.0-dev"
+dependencies = [
+ "discord-rich-presence",
+ "futures-util",
+ "md5",
+ "psysonic-core",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "tauri",
+ "tokio",
+ "url",
+]
+
 [[package]]
 name = "psysonic-syncfs"
 version = "1.46.0-dev"
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 6e876909..fc39b8ff 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -34,6 +34,7 @@ psysonic-core = { path = "crates/psysonic-core" }
 psysonic-analysis = { path = "crates/psysonic-analysis" }
 psysonic-audio = { path = "crates/psysonic-audio" }
 psysonic-syncfs = { path = "crates/psysonic-syncfs" }
+psysonic-integration = { path = "crates/psysonic-integration" }
 tauri = { version = "2", features = ["tray-icon", "image-png"] }
 tauri-plugin-single-instance = "2"
 tauri-plugin-shell = "2"
diff --git a/src-tauri/crates/psysonic-integration/Cargo.toml b/src-tauri/crates/psysonic-integration/Cargo.toml
new file mode 100644
index 00000000..428be40f
--- /dev/null
+++ b/src-tauri/crates/psysonic-integration/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "psysonic-integration"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+publish = false
+
+[dependencies]
+psysonic-core = { path = "../psysonic-core" }
+
+tauri = { version = "2" }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["rt", "time", "sync"] }
+reqwest = { version = "0.13", default-features = false, features = ["stream", "json", "rustls", "blocking"] }
+futures-util = "0.3"
+discord-rich-presence = "1.1"
+url = "2"
+md5 = "0.8"
diff --git a/src-tauri/src/lib_commands/ui/bandsintown.rs b/src-tauri/crates/psysonic-integration/src/bandsintown.rs
similarity index 94%
rename from src-tauri/src/lib_commands/ui/bandsintown.rs
rename to src-tauri/crates/psysonic-integration/src/bandsintown.rs
index 21c01088..abd85c21 100644
--- a/src-tauri/src/lib_commands/ui/bandsintown.rs
+++ b/src-tauri/crates/psysonic-integration/src/bandsintown.rs
@@ -2,10 +2,10 @@
 // Public REST API: https://rest.bandsintown.com/artists/{name}/events?app_id=…
 // Bandsintown whitelists app IDs — arbitrary strings now return 403 Forbidden.
 // `js_app_id` is the ID their own embeddable widget uses and is broadly accepted.
-pub(crate) const BANDSINTOWN_APP_ID: &str = "js_app_id";
+pub const BANDSINTOWN_APP_ID: &str = "js_app_id";
 
 #[derive(serde::Serialize, Default)]
-pub(crate) struct BandsintownEvent {
+pub struct BandsintownEvent {
     datetime: String,        // ISO 8601 (e.g. "2026-04-23T20:30:00")
     venue_name: String,
     venue_city: String,
@@ -20,7 +20,7 @@ pub(crate) struct BandsintownEvent {
 /// Returns an empty list on any failure (404, network, parse) — the UI
 /// just hides the section in that case.
 #[tauri::command]
-pub(crate) async fn fetch_bandsintown_events(artist_name: String) -> Result<Vec<BandsintownEvent>, String> {
+pub async fn fetch_bandsintown_events(artist_name: String) -> Result<Vec<BandsintownEvent>, String> {
     let trimmed = artist_name.trim();
     if trimmed.is_empty() {
         return Ok(vec![]);
diff --git a/src-tauri/src/discord.rs b/src-tauri/crates/psysonic-integration/src/discord.rs
similarity index 100%
rename from src-tauri/src/discord.rs
rename to src-tauri/crates/psysonic-integration/src/discord.rs
diff --git a/src-tauri/crates/psysonic-integration/src/lib.rs b/src-tauri/crates/psysonic-integration/src/lib.rs
new file mode 100644
index 00000000..3182b29c
--- /dev/null
+++ b/src-tauri/crates/psysonic-integration/src/lib.rs
@@ -0,0 +1,17 @@
+//! `psysonic-integration` — outbound bridges to external services that the
+//! UI surfaces but the WebView can't talk to directly (CORS, custom auth, etc.).
+//!
+//! Domains:
+//! - `discord`     — Discord Rich Presence (album artwork via iTunes)
+//! - `navidrome`   — Navidrome's native REST API (admin: users/playlists/covers/queries)
+//! - `remote`      — radio-browser, last.fm, ICY-meta probe, generic CORS proxy
+//! - `bandsintown` — bandsintown events for an artist
+
+// Re-export the logging facade so submodules keep using
+// `crate::app_eprintln!()` and `crate::app_deprintln!()`.
+pub use psysonic_core::{app_deprintln, app_eprintln, logging};
+
+pub mod bandsintown;
+pub mod discord;
+pub mod navidrome;
+pub mod remote;
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/client.rs b/src-tauri/crates/psysonic-integration/src/navidrome/client.rs
similarity index 92%
rename from src-tauri/src/lib_commands/app_api/navidrome/client.rs
rename to src-tauri/crates/psysonic-integration/src/navidrome/client.rs
index 8a706159..5b40ec86 100644
--- a/src-tauri/src/lib_commands/app_api/navidrome/client.rs
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/client.rs
@@ -2,7 +2,7 @@
 //! Used by every other navidrome submodule for `/auth/*` and `/api/*` calls.
 
 /// Authenticate with Navidrome's own REST API and return a Bearer token.
-pub(crate) async fn navidrome_token(server_url: &str, username: &str, password: &str) -> Result<String, String> {
+pub async fn navidrome_token(server_url: &str, username: &str, password: &str) -> Result<String, String> {
     let client = reqwest::Client::new();
     let resp = client
         .post(format!("{}/auth/login", server_url))
@@ -19,7 +19,7 @@ pub(crate) async fn navidrome_token(server_url: &str, username: &str, password:
 
 /// Payload returned by Navidrome's `/auth/login`.
 #[derive(serde::Serialize)]
-pub(crate) struct NdLoginResult {
+pub struct NdLoginResult {
     pub(super) token: String,
     #[serde(rename = "userId")]
     pub(super) user_id: String,
@@ -31,7 +31,7 @@ pub(crate) struct NdLoginResult {
 /// frontend toasts can show the actual transport cause (connection refused,
 /// tls handshake fail, cert expired, etc.) instead of reqwest's opaque
 /// "error sending request for url (…)" wrapper.
-pub(crate) fn nd_err(e: reqwest::Error) -> String {
+pub fn nd_err(e: reqwest::Error) -> String {
     let mut msg = e.to_string();
     let mut src: Option<&(dyn std::error::Error + 'static)> = std::error::Error::source(&e);
     while let Some(s) = src {
@@ -50,7 +50,7 @@ pub(crate) fn nd_err(e: reqwest::Error) -> String {
 /// turns a transient glitch into a visible outage. Status-level failures
 /// (401/403/400 with body) return immediately — we don't retry logic
 /// errors.
-pub(crate) async fn nd_retry<F, Fut>(mut build_and_send: F) -> Result<reqwest::Response, String>
+pub async fn nd_retry<F, Fut>(mut build_and_send: F) -> Result<reqwest::Response, String>
 where
     F: FnMut() -> Fut,
     Fut: std::future::Future<Output = Result<reqwest::Response, reqwest::Error>>,
@@ -90,7 +90,7 @@ where
 /// keep-alive connections in the pool caused intermittent "tls handshake
 /// eof" errors on the second call to an admin endpoint when a server or
 /// proxy had already closed the TCP connection between calls.
-pub(crate) fn nd_http_client() -> reqwest::Client {
+pub fn nd_http_client() -> reqwest::Client {
     // TLS 1.2 only: rustls + nginx with TLS-1.3 session resumption caches
     // produces intermittent ECONNRESET mid-handshake when the upstream
     // starts churning keep-alive connections. Pinning TLS 1.2 matches what
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/covers.rs b/src-tauri/crates/psysonic-integration/src/navidrome/covers.rs
similarity index 95%
rename from src-tauri/src/lib_commands/app_api/navidrome/covers.rs
rename to src-tauri/crates/psysonic-integration/src/navidrome/covers.rs
index c061b3ce..7ea0162f 100644
--- a/src-tauri/src/lib_commands/app_api/navidrome/covers.rs
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/covers.rs
@@ -5,7 +5,7 @@
 use super::client::navidrome_token;
 
 #[tauri::command]
-pub(crate) async fn upload_playlist_cover(
+pub async fn upload_playlist_cover(
     server_url: String,
     playlist_id: String,
     username: String,
@@ -32,7 +32,7 @@ pub(crate) async fn upload_playlist_cover(
 }
 
 #[tauri::command]
-pub(crate) async fn upload_radio_cover(
+pub async fn upload_radio_cover(
     server_url: String,
     radio_id: String,
     username: String,
@@ -59,7 +59,7 @@ pub(crate) async fn upload_radio_cover(
 }
 
 #[tauri::command]
-pub(crate) async fn upload_artist_image(
+pub async fn upload_artist_image(
     server_url: String,
     artist_id: String,
     username: String,
@@ -86,7 +86,7 @@ pub(crate) async fn upload_artist_image(
 }
 
 #[tauri::command]
-pub(crate) async fn delete_radio_cover(
+pub async fn delete_radio_cover(
     server_url: String,
     radio_id: String,
     username: String,
diff --git a/src-tauri/crates/psysonic-integration/src/navidrome/mod.rs b/src-tauri/crates/psysonic-integration/src/navidrome/mod.rs
new file mode 100644
index 00000000..d838a950
--- /dev/null
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/mod.rs
@@ -0,0 +1,11 @@
+//! Navidrome native REST API: split into a small client/auth/retry core
+//! plus per-domain submodules (covers, users, queries, playlists). Each
+//! Tauri command goes through `nd_http_client()` + `nd_retry()` so flaky
+//! reverse proxies in front of the server don't surface as user-visible
+//! transport errors on a single retry-able blip.
+
+mod client;
+pub mod covers;
+pub mod playlists;
+pub mod queries;
+pub mod users;
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/playlists.rs b/src-tauri/crates/psysonic-integration/src/navidrome/playlists.rs
similarity index 94%
rename from src-tauri/src/lib_commands/app_api/navidrome/playlists.rs
rename to src-tauri/crates/psysonic-integration/src/navidrome/playlists.rs
index cd4d9f23..2d2d9c36 100644
--- a/src-tauri/src/lib_commands/app_api/navidrome/playlists.rs
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/playlists.rs
@@ -6,7 +6,7 @@ use super::client::{nd_err, nd_http_client, nd_retry};
 
 /// GET `/api/playlist` — list playlists; pass `smart=true` to filter smart playlists.
 #[tauri::command]
-pub(crate) async fn nd_list_playlists(
+pub async fn nd_list_playlists(
     server_url: String,
     token: String,
     smart: Option<bool>,
@@ -30,7 +30,7 @@ pub(crate) async fn nd_list_playlists(
 
 /// POST `/api/playlist` — create playlist (supports smart rules payload).
 #[tauri::command]
-pub(crate) async fn nd_create_playlist(
+pub async fn nd_create_playlist(
     server_url: String,
     token: String,
     body: serde_json::Value,
@@ -53,7 +53,7 @@ pub(crate) async fn nd_create_playlist(
 
 /// PUT `/api/playlist/{id}` — update playlist (supports smart rules payload).
 #[tauri::command]
-pub(crate) async fn nd_update_playlist(
+pub async fn nd_update_playlist(
     server_url: String,
     token: String,
     id: String,
@@ -77,7 +77,7 @@ pub(crate) async fn nd_update_playlist(
 
 /// GET `/api/playlist/{id}` — get a single playlist (includes smart rules if available).
 #[tauri::command]
-pub(crate) async fn nd_get_playlist(
+pub async fn nd_get_playlist(
     server_url: String,
     token: String,
     id: String,
@@ -99,7 +99,7 @@ pub(crate) async fn nd_get_playlist(
 
 /// DELETE `/api/playlist/{id}` — delete playlist.
 #[tauri::command]
-pub(crate) async fn nd_delete_playlist(
+pub async fn nd_delete_playlist(
     server_url: String,
     token: String,
     id: String,
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/queries.rs b/src-tauri/crates/psysonic-integration/src/navidrome/queries.rs
similarity index 96%
rename from src-tauri/src/lib_commands/app_api/navidrome/queries.rs
rename to src-tauri/crates/psysonic-integration/src/navidrome/queries.rs
index 193f3977..58ff89f2 100644
--- a/src-tauri/src/lib_commands/app_api/navidrome/queries.rs
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/queries.rs
@@ -7,7 +7,7 @@ use super::client::{navidrome_token, nd_err, nd_http_client, nd_retry};
 /// GET `/api/song?_sort=...&_order=...&_start=...&_end=...` — paginated song list.
 /// Available to any authenticated user (no admin required). Returns raw JSON array.
 #[tauri::command]
-pub(crate) async fn nd_list_songs(
+pub async fn nd_list_songs(
     server_url: String,
     token: String,
     sort: String,
@@ -53,7 +53,7 @@ fn nd_build_filters(seed: serde_json::Map<String, serde_json::Value>, library_id
 /// Navidrome 0.55.0+ (uses `library_artist.stats` JSON aggregate). Available to any
 /// authenticated user. Returns raw JSON array.
 #[tauri::command]
-pub(crate) async fn nd_list_artists_by_role(
+pub async fn nd_list_artists_by_role(
     server_url: String,
     token: String,
     role: String,
@@ -93,7 +93,7 @@ pub(crate) async fn nd_list_artists_by_role(
 /// (or conductor-only, lyricist-only, …) credits are unreachable there. Navidrome
 /// generates `role_<role>_id` filters dynamically from `model.AllRoles`.
 #[tauri::command]
-pub(crate) async fn nd_list_albums_by_artist_role(
+pub async fn nd_list_albums_by_artist_role(
     server_url: String,
     token: String,
     artist_id: String,
@@ -131,7 +131,7 @@ pub(crate) async fn nd_list_albums_by_artist_role(
 
 /// GET `/api/library` — list all libraries (admin only). Returns the raw JSON array.
 #[tauri::command]
-pub(crate) async fn nd_list_libraries(
+pub async fn nd_list_libraries(
     server_url: String,
     token: String,
 ) -> Result<serde_json::Value, String> {
@@ -150,7 +150,7 @@ pub(crate) async fn nd_list_libraries(
 /// PUT `/api/user/{id}/library` — assign libraries to a non-admin user.
 /// Admin users auto-receive all libraries; calling this for an admin returns HTTP 400.
 #[tauri::command]
-pub(crate) async fn nd_set_user_libraries(
+pub async fn nd_set_user_libraries(
     server_url: String,
     token: String,
     id: String,
@@ -184,7 +184,7 @@ pub(crate) async fn nd_set_user_libraries(
 /// Returns `Ok(None)` when the response has no `path` field — Navidrome can omit
 /// it for non-admin users on some configurations.
 #[tauri::command]
-pub(crate) async fn nd_get_song_path(
+pub async fn nd_get_song_path(
     server_url: String,
     username: String,
     password: String,
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/users.rs b/src-tauri/crates/psysonic-integration/src/navidrome/users.rs
similarity index 95%
rename from src-tauri/src/lib_commands/app_api/navidrome/users.rs
rename to src-tauri/crates/psysonic-integration/src/navidrome/users.rs
index 572f574a..90b501d4 100644
--- a/src-tauri/src/lib_commands/app_api/navidrome/users.rs
+++ b/src-tauri/crates/psysonic-integration/src/navidrome/users.rs
@@ -6,7 +6,7 @@ use super::client::{nd_err, nd_http_client, nd_retry, NdLoginResult};
 
 /// Log in to Navidrome's native REST API. Returns a Bearer token and whether the user is admin.
 #[tauri::command]
-pub(crate) async fn navidrome_login(
+pub async fn navidrome_login(
     server_url: String,
     username: String,
     password: String,
@@ -30,7 +30,7 @@ pub(crate) async fn navidrome_login(
 
 /// GET `/api/user` — admin only. Returns the raw JSON array verbatim so the frontend can pick fields.
 #[tauri::command]
-pub(crate) async fn nd_list_users(
+pub async fn nd_list_users(
     server_url: String,
     token: String,
 ) -> Result<serde_json::Value, String> {
@@ -48,7 +48,7 @@ pub(crate) async fn nd_list_users(
 
 /// POST `/api/user` — create a user.
 #[tauri::command]
-pub(crate) async fn nd_create_user(
+pub async fn nd_create_user(
     server_url: String,
     token: String,
     user_name: String,
@@ -81,7 +81,7 @@ pub(crate) async fn nd_create_user(
 
 /// PUT `/api/user/{id}` — update a user. Pass an empty `password` to leave it unchanged.
 #[tauri::command]
-pub(crate) async fn nd_update_user(
+pub async fn nd_update_user(
     server_url: String,
     token: String,
     id: String,
@@ -118,7 +118,7 @@ pub(crate) async fn nd_update_user(
 
 /// DELETE `/api/user/{id}`.
 #[tauri::command]
-pub(crate) async fn nd_delete_user(
+pub async fn nd_delete_user(
     server_url: String,
     token: String,
     id: String,
diff --git a/src-tauri/src/lib_commands/app_api/remote.rs b/src-tauri/crates/psysonic-integration/src/remote.rs
similarity index 92%
rename from src-tauri/src/lib_commands/app_api/remote.rs
rename to src-tauri/crates/psysonic-integration/src/remote.rs
index a9bbe185..11a6c896 100644
--- a/src-tauri/src/lib_commands/app_api/remote.rs
+++ b/src-tauri/crates/psysonic-integration/src/remote.rs
@@ -1,10 +1,10 @@
-use crate::subsonic_wire_user_agent;
+use psysonic_core::user_agent::subsonic_wire_user_agent;
 
-pub(crate) const RADIO_PAGE_SIZE: u32 = 25;
+pub const RADIO_PAGE_SIZE: u32 = 25;
 
 /// Search the radio-browser.info directory (needs User-Agent header — CORS would block WebView).
 #[tauri::command]
-pub(crate) async fn search_radio_browser(query: String, offset: u32) -> Result<Vec<serde_json::Value>, String> {
+pub async fn search_radio_browser(query: String, offset: u32) -> Result<Vec<serde_json::Value>, String> {
     let client = reqwest::Client::new();
     let limit_s = RADIO_PAGE_SIZE.to_string();
     let offset_s = offset.to_string();
@@ -27,7 +27,7 @@ pub(crate) async fn search_radio_browser(query: String, offset: u32) -> Result<V
 
 /// Fetch top-voted stations from radio-browser.info for initial suggestions.
 #[tauri::command]
-pub(crate) async fn get_top_radio_stations(offset: u32) -> Result<Vec<serde_json::Value>, String> {
+pub async fn get_top_radio_stations(offset: u32) -> Result<Vec<serde_json::Value>, String> {
     let client = reqwest::Client::new();
     let limit_s = RADIO_PAGE_SIZE.to_string();
     let offset_s = offset.to_string();
@@ -46,7 +46,7 @@ pub(crate) async fn get_top_radio_stations(offset: u32) -> Result<Vec<serde_json
 /// Fetch arbitrary URL bytes (e.g. radio station favicon) through Rust to bypass CORS.
 /// Returns (bytes, content_type).
 #[tauri::command]
-pub(crate) async fn fetch_url_bytes(url: String) -> Result<(Vec<u8>, String), String> {
+pub async fn fetch_url_bytes(url: String) -> Result<(Vec<u8>, String), String> {
     let client = reqwest::Client::builder()
         .user_agent(subsonic_wire_user_agent())
         .timeout(std::time::Duration::from_secs(10))
@@ -76,7 +76,7 @@ pub(crate) async fn fetch_url_bytes(url: String) -> Result<(Vec<u8>, String), St
 /// Fetch a JSON API endpoint through Rust to bypass CORS/WebView networking restrictions.
 /// Returns the response body as a UTF-8 string for parsing on the JS side.
 #[tauri::command]
-pub(crate) async fn fetch_json_url(url: String) -> Result<String, String> {
+pub async fn fetch_json_url(url: String) -> Result<String, String> {
     let client = reqwest::Client::builder()
         .user_agent(subsonic_wire_user_agent())
         .timeout(std::time::Duration::from_secs(10))
@@ -96,7 +96,7 @@ pub(crate) async fn fetch_json_url(url: String) -> Result<String, String> {
 
 /// ICY metadata response returned to the frontend.
 #[derive(serde::Serialize)]
-pub(crate) struct IcyMetadata {
+pub struct IcyMetadata {
     /// The `StreamTitle` from the inline ICY metadata block in the stream (e.g. `"Artist - Title"`).
     stream_title: Option<String>,
     /// Value of the `icy-name` response header.
@@ -110,7 +110,7 @@ pub(crate) struct IcyMetadata {
 }
 
 /// Extract the first `File1=` stream URL from a PLS playlist file.
-pub(crate) fn parse_pls_stream_url(content: &str) -> Option<String> {
+pub fn parse_pls_stream_url(content: &str) -> Option<String> {
     content.lines()
         .map(str::trim)
         .find(|l| l.to_lowercase().starts_with("file1="))
@@ -122,7 +122,7 @@ pub(crate) fn parse_pls_stream_url(content: &str) -> Option<String> {
 }
 
 /// Extract the first non-comment HTTP URL from an M3U/M3U8 playlist file.
-pub(crate) fn parse_m3u_stream_url(content: &str) -> Option<String> {
+pub fn parse_m3u_stream_url(content: &str) -> Option<String> {
     content.lines()
         .map(str::trim)
         .find(|l| !l.is_empty() && !l.starts_with('#')
@@ -132,7 +132,7 @@ pub(crate) fn parse_m3u_stream_url(content: &str) -> Option<String> {
 
 /// If `url` points to a PLS or M3U playlist, fetch it and return the first
 /// stream URL it contains.  Returns `None` for direct stream URLs.
-pub(crate) async fn resolve_playlist_url(client: &reqwest::Client, url: &str) -> Option<String> {
+pub async fn resolve_playlist_url(client: &reqwest::Client, url: &str) -> Option<String> {
     let path = url.split('?').next().unwrap_or(url).to_lowercase();
     let is_pls = path.ends_with(".pls");
     let is_m3u = path.ends_with(".m3u") || path.ends_with(".m3u8");
@@ -173,7 +173,7 @@ pub(crate) async fn resolve_playlist_url(client: &reqwest::Client, url: &str) ->
 /// If `url` is a PLS or M3U playlist file it is resolved to the first direct
 /// stream URL before the ICY request is made.
 #[tauri::command]
-pub(crate) async fn fetch_icy_metadata(url: String) -> Result<IcyMetadata, String> {
+pub async fn fetch_icy_metadata(url: String) -> Result<IcyMetadata, String> {
     use futures_util::StreamExt;
 
     let client = reqwest::Client::builder()
@@ -277,7 +277,7 @@ pub(crate) async fn fetch_icy_metadata(url: String) -> Result<IcyMetadata, Strin
 /// Returns the original URL unchanged if it is not a recognised playlist format
 /// or if the playlist cannot be fetched/parsed.
 #[tauri::command]
-pub(crate) async fn resolve_stream_url(url: String) -> String {
+pub async fn resolve_stream_url(url: String) -> String {
     let Ok(client) = reqwest::Client::builder()
         .timeout(std::time::Duration::from_secs(10))
         .build()
@@ -291,7 +291,7 @@ pub(crate) async fn resolve_stream_url(url: String) -> String {
 /// `params` is a list of [key, value] pairs (method must be included).
 /// If `sign` is true an api_sig is computed. If `get` is true, a GET request is made.
 #[tauri::command]
-pub(crate) async fn lastfm_request(
+pub async fn lastfm_request(
     params: Vec<[String; 2]>,
     sign: bool,
     get: bool,
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index e104cb9f..0bf06e4c 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -2,9 +2,10 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 pub mod cli;
-mod discord;
 mod lib_commands;
 
+pub use psysonic_integration::discord;
+
 pub use psysonic_core::logging;
 pub use psysonic_core::{app_eprintln, app_deprintln};
 pub use psysonic_core::user_agent::{
@@ -391,35 +392,35 @@ pub fn run() {
             audio::device_commands::audio_default_output_device_name,
             audio::device_commands::audio_set_device,
             audio::commands::audio_chain_preload,
-            discord::discord_update_presence,
-            discord::discord_clear_presence,
-            lastfm_request,
-            upload_playlist_cover,
-            upload_radio_cover,
-            upload_artist_image,
-            delete_radio_cover,
-            navidrome_login,
-            nd_list_users,
-            nd_create_user,
-            nd_update_user,
-            nd_delete_user,
-            nd_list_libraries,
-            nd_list_songs,
-            nd_list_artists_by_role,
-            nd_list_albums_by_artist_role,
-            nd_set_user_libraries,
-            nd_list_playlists,
-            nd_create_playlist,
-            nd_update_playlist,
-            nd_get_playlist,
-            nd_delete_playlist,
-            nd_get_song_path,
-            search_radio_browser,
-            get_top_radio_stations,
-            fetch_url_bytes,
-            fetch_json_url,
-            fetch_icy_metadata,
-            resolve_stream_url,
+            psysonic_integration::discord::discord_update_presence,
+            psysonic_integration::discord::discord_clear_presence,
+            psysonic_integration::remote::lastfm_request,
+            psysonic_integration::navidrome::covers::upload_playlist_cover,
+            psysonic_integration::navidrome::covers::upload_radio_cover,
+            psysonic_integration::navidrome::covers::upload_artist_image,
+            psysonic_integration::navidrome::covers::delete_radio_cover,
+            psysonic_integration::navidrome::users::navidrome_login,
+            psysonic_integration::navidrome::users::nd_list_users,
+            psysonic_integration::navidrome::users::nd_create_user,
+            psysonic_integration::navidrome::users::nd_update_user,
+            psysonic_integration::navidrome::users::nd_delete_user,
+            psysonic_integration::navidrome::queries::nd_list_libraries,
+            psysonic_integration::navidrome::queries::nd_list_songs,
+            psysonic_integration::navidrome::queries::nd_list_artists_by_role,
+            psysonic_integration::navidrome::queries::nd_list_albums_by_artist_role,
+            psysonic_integration::navidrome::queries::nd_set_user_libraries,
+            psysonic_integration::navidrome::playlists::nd_list_playlists,
+            psysonic_integration::navidrome::playlists::nd_create_playlist,
+            psysonic_integration::navidrome::playlists::nd_update_playlist,
+            psysonic_integration::navidrome::playlists::nd_get_playlist,
+            psysonic_integration::navidrome::playlists::nd_delete_playlist,
+            psysonic_integration::navidrome::queries::nd_get_song_path,
+            psysonic_integration::remote::search_radio_browser,
+            psysonic_integration::remote::get_top_radio_stations,
+            psysonic_integration::remote::fetch_url_bytes,
+            psysonic_integration::remote::fetch_json_url,
+            psysonic_integration::remote::fetch_icy_metadata,
+            psysonic_integration::remote::resolve_stream_url,
             analysis_get_waveform,
             analysis_get_waveform_for_track,
             analysis_get_loudness_for_track,
@@ -457,7 +458,7 @@ pub fn run() {
             psysonic_syncfs::cache::downloads::open_folder,
             psysonic_syncfs::cache::downloads::get_embedded_lyrics,
             psysonic_syncfs::cache::downloads::fetch_netease_lyrics,
-            fetch_bandsintown_events,
+            psysonic_integration::bandsintown::fetch_bandsintown_events,
             #[cfg(target_os = "windows")]
             taskbar_win::update_taskbar_icon,
         ])
diff --git a/src-tauri/src/lib_commands/app_api/mod.rs b/src-tauri/src/lib_commands/app_api/mod.rs
index 8f861846..30820c11 100644
--- a/src-tauri/src/lib_commands/app_api/mod.rs
+++ b/src-tauri/src/lib_commands/app_api/mod.rs
@@ -1,11 +1,9 @@
+mod analysis;
 mod cli_bridge;
 mod core;
-mod navidrome;
+mod integration;
 mod perf;
 mod platform;
-mod remote;
-mod integration;
-mod analysis;
 
 // Tauri commands re-exported for the lib.rs invoke_handler.
 pub(crate) use cli_bridge::{
@@ -16,19 +14,8 @@ pub(crate) use core::{
     exit_app, export_runtime_logs, frontend_debug_log, greet, set_logging_mode,
     set_subsonic_wire_user_agent,
 };
-pub(crate) use navidrome::{
-    delete_radio_cover, navidrome_login, nd_create_playlist, nd_create_user, nd_delete_playlist,
-    nd_delete_user, nd_get_playlist, nd_get_song_path, nd_list_albums_by_artist_role,
-    nd_list_artists_by_role, nd_list_libraries, nd_list_playlists, nd_list_songs, nd_list_users,
-    nd_set_user_libraries, nd_update_playlist, nd_update_user, upload_artist_image,
-    upload_playlist_cover, upload_radio_cover,
-};
 pub(crate) use perf::performance_cpu_snapshot;
 pub(crate) use platform::{set_linux_webkit_smooth_scrolling, set_window_decorations};
-pub(crate) use remote::{
-    fetch_icy_metadata, fetch_json_url, fetch_url_bytes, get_top_radio_stations, lastfm_request,
-    resolve_stream_url, search_radio_browser,
-};
 pub(crate) use integration::{
     check_dir_accessible, mpris_set_metadata, mpris_set_playback, register_global_shortcut,
     unregister_global_shortcut,
@@ -38,3 +25,7 @@ pub(crate) use analysis::{
     analysis_enqueue_seed_from_url, analysis_get_loudness_for_track, analysis_get_waveform,
     analysis_get_waveform_for_track, analysis_prune_pending_to_track_ids,
 };
+
+// Discord, Navidrome admin, last.fm + radio-browser + CORS proxy, bandsintown
+// now live in `psysonic_integration`. invoke_handler! in lib.rs registers
+// them with their full paths so Tauri's `__cmd__*` macros resolve correctly.
diff --git a/src-tauri/src/lib_commands/app_api/navidrome/mod.rs b/src-tauri/src/lib_commands/app_api/navidrome/mod.rs
deleted file mode 100644
index b074f30a..00000000
--- a/src-tauri/src/lib_commands/app_api/navidrome/mod.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-//! Navidrome native REST API: split into a small client/auth/retry core
-//! plus per-domain submodules (covers, users, queries, playlists). Each
-//! Tauri command goes through `nd_http_client()` + `nd_retry()` so flaky
-//! reverse proxies in front of the server don't surface as user-visible
-//! transport errors on a single retry-able blip.
-
-mod client;
-mod covers;
-mod users;
-mod queries;
-mod playlists;
-
-// Re-export only the Tauri commands — `client` items (nd_http_client,
-// nd_retry, navidrome_token, NdLoginResult, nd_err) are internal helpers
-// used by the other submodules and don't need crate-wide visibility.
-pub(crate) use covers::{
-    delete_radio_cover, upload_artist_image, upload_playlist_cover, upload_radio_cover,
-};
-pub(crate) use users::{
-    navidrome_login, nd_create_user, nd_delete_user, nd_list_users, nd_update_user,
-};
-pub(crate) use queries::{
-    nd_get_song_path, nd_list_albums_by_artist_role, nd_list_artists_by_role, nd_list_libraries,
-    nd_list_songs, nd_set_user_libraries,
-};
-pub(crate) use playlists::{
-    nd_create_playlist, nd_delete_playlist, nd_get_playlist, nd_list_playlists, nd_update_playlist,
-};
diff --git a/src-tauri/src/lib_commands/ui/mod.rs b/src-tauri/src/lib_commands/ui/mod.rs
index f919926f..cb084ca9 100644
--- a/src-tauri/src/lib_commands/ui/mod.rs
+++ b/src-tauri/src/lib_commands/ui/mod.rs
@@ -1,9 +1,8 @@
 mod mini;
-mod bandsintown;
 
 pub(crate) use mini::{
     close_mini_player, open_mini_player, pause_rendering, persist_mini_pos_throttled,
     preload_mini_player, resize_mini_player, resume_rendering, set_mini_player_always_on_top,
     show_main_window, PAUSE_RENDERING_JS, RESUME_RENDERING_JS,
 };
-pub(crate) use bandsintown::fetch_bandsintown_events;
+// Bandsintown moved to psysonic-integration; lib.rs uses the full path.