feat(m2): wire ChatPanel to stream LLM responses — thinking state, token accumulation, error display

- Replace `let _ = app.emit(...)` with logged warnings so dropped chat-done/chat-token events surface in logs instead of silently hanging the frontend
- Switch streaming buffer from String to Vec<u8> so multi-byte UTF-8 sequences split across TCP chunks are accumulated correctly before converting to str
- Use `.context("stream read error")` (anyhow) instead of manual anyhow::anyhow! for the chunk read error path
- Rename test parse_empty_token_is_handled -> parse_empty_content_chunk_deserializes (more precise)
- Add malformed_json_fails_to_parse test

.gitignore

@@ -29,3 +29,6 @@ src-tauri/target/
 # Secrets
 .env
 .env.local
+
+# Visual companion brainstorm sessions
+.superpowers/

package-lock.json

@@ -8,6 +8,7 @@
       "name": "robin",
       "version": "0.0.0",
       "dependencies": {
+        "@tauri-apps/api": "^2.11.0",
         "vue": "^3.5.34"
       },
       "devDependencies": {
@@ -398,6 +399,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@tauri-apps/api": {
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/@tauri-apps/api/-/api-2.11.0.tgz",
+      "integrity": "sha512-7CinYODhky9lmO23xHnUFv0Xt43fbtWMyxZcLcRBlFkcgXKuEirBvHpmtJ89YMhyeGcq20Wuc47Fa4XjyniywA==",
+      "license": "Apache-2.0 OR MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/tauri"
+      }
+    },
     "node_modules/@tybys/wasm-util": {
       "version": "0.10.2",
       "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.2.tgz",

package.json

@@ -9,6 +9,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@tauri-apps/api": "^2.11.0",
     "vue": "^3.5.34"
   },
   "devDependencies": {

src-tauri/Cargo.toml

@@ -24,8 +24,14 @@ log = "0.4"
 anyhow = "1.0"
 tokio = { version = "1", features = ["full"] }
 toml = "0.8"
+notify = "8"
+dirs = "6"
 tauri = { version = "2.11.2", features = ["tray-icon"] }
 tauri-plugin-log = "2"
 tauri-plugin-notification = "2"
 tauri-plugin-shell = "2"
 tauri-plugin-fs = "2"
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls", "stream"] }
+
+[dev-dependencies]
+tempfile = "3"

src-tauri/build.rs

@@ -1,3 +1,3 @@
 fn main() {
-  tauri_build::build()
+    tauri_build::build()
 }

src-tauri/capabilities/default.json

@@ -3,9 +3,11 @@
   "identifier": "default",
   "description": "enables the default permissions",
   "windows": [
-    "main"
+    "chat"
   ],
   "permissions": [
-    "core:default"
+    "core:default",
+    "notification:default",
+    "shell:allow-open"
   ]
 }

src-tauri/patterns/macos-to-arch.toml

@@ -0,0 +1,65 @@
+[meta]
+source_os = "macos"
+target_distro_family = "arch"
+
+[log_paths]
+steam     = "~/.local/share/Steam/logs/content_log.txt"
+proton    = "~/.local/share/Steam/logs/proton_log.txt"
+retroarch = "~/.config/retroarch/retroarch.log"
+lutris    = "~/.cache/lutris/logs/lutris.log"
+
+[[patterns]]
+id       = "aur-build-failure"
+sources  = ["journald"]
+match_text = "error: failed to build"
+severity = "warn"
+title    = "AUR package build failed"
+body     = "A package failed to compile from source. This usually means a missing dependency or a broken AUR package."
+
+[[patterns]]
+id       = "aur-pgp-key"
+sources  = ["journald"]
+match_text = "unknown public key"
+severity = "warn"
+title    = "Missing PGP key for AUR package"
+body     = "The package signature can't be verified. Run: gpg --recv-keys <keyid>"
+
+[[patterns]]
+id       = "proton-runtime-missing"
+sources  = ["applog:proton"]
+match_text = "wine: cannot find"
+severity = "warn"
+title    = "Proton runtime issue"
+body     = "Steam Proton couldn't find a required file. Try: right-click the game -> Properties -> Local Files -> Verify game files."
+
+[[patterns]]
+id       = "steam-disk-write"
+sources  = ["applog:steam"]
+match_text = "ERROR: failed to write"
+severity = "warn"
+title    = "Steam disk write error"
+body     = "Steam can't write to its library folder. Check that you own the directory: ls -la ~/.local/share/Steam"
+
+[[patterns]]
+id       = "retroarch-shader-fail"
+sources  = ["applog:retroarch"]
+match_text = "Failed to compile shader"
+severity = "info"
+title    = "RetroArch shader failed to compile"
+body     = "A graphical shader couldn't load. Try switching to a different shader preset in Settings -> Video -> Shaders."
+
+[[patterns]]
+id       = "kernel-driver-firmware"
+sources  = ["kmsg"]
+match_text = "firmware: failed to load"
+severity = "warn"
+title    = "Missing firmware for hardware"
+body     = "Your system is missing a firmware file for a hardware component. On Arch, try: sudo pacman -S linux-firmware"
+
+[[patterns]]
+id       = "missing-codec"
+sources  = ["journald"]
+match_text = "GStreamer: Failed to find plugin"
+severity = "info"
+title    = "Missing media codec"
+body     = "A media codec isn't installed. On Arch: sudo pacman -S gst-plugins-good gst-plugins-bad gst-libav"

src-tauri/patterns/windows-to-debian.toml

@@ -0,0 +1,56 @@
+[meta]
+source_os = "windows"
+target_distro_family = "debian"
+
+[log_paths]
+steam     = "~/.local/share/Steam/logs/content_log.txt"
+proton    = "~/.local/share/Steam/logs/proton_log.txt"
+retroarch = "~/.config/retroarch/retroarch.log"
+
+[[patterns]]
+id       = "apt-lock"
+sources  = ["journald"]
+match_text = "Could not get lock /var/lib/dpkg/lock"
+severity = "warn"
+title    = "Package manager is locked"
+body     = "Another process is using apt. Wait a moment and try again. If it's stuck: sudo rm /var/lib/dpkg/lock-frontend"
+
+[[patterns]]
+id       = "apt-unmet-dependency"
+sources  = ["journald"]
+match_text = "Unmet dependencies"
+severity = "warn"
+title    = "Package dependency conflict"
+body     = "apt can't resolve a dependency. Try: sudo apt --fix-broken install"
+
+[[patterns]]
+id       = "proton-runtime-missing"
+sources  = ["applog:proton"]
+match_text = "wine: cannot find"
+severity = "warn"
+title    = "Proton runtime issue"
+body     = "Steam Proton couldn't find a required file. Right-click the game -> Properties -> Local Files -> Verify game files."
+
+[[patterns]]
+id       = "kernel-driver-firmware"
+sources  = ["kmsg"]
+match_text = "firmware: failed to load"
+severity = "warn"
+title    = "Missing firmware for hardware"
+body     = "Your system is missing a firmware file. On Debian/Ubuntu/Mint: sudo apt install firmware-linux firmware-linux-nonfree"
+
+[[patterns]]
+id       = "missing-codec"
+sources  = ["journald"]
+match_text = "GStreamer: Failed to find plugin"
+severity = "info"
+title    = "Missing media codec"
+body     = "A media codec isn't installed. Try: sudo apt install ubuntu-restricted-extras"
+
+[[patterns]]
+id       = "snap-confinement"
+sources  = ["journald"]
+match_text = "snap: cannot use strict"
+severity = "info"
+title    = "Snap package confinement issue"
+body     = "A Snap package is having permission trouble. Try running it with --devmode, or look for a Flatpak or apt alternative."

src-tauri/src/commands.rs

@@ -1,6 +1,6 @@
-use crate::config::{RobinConfig, MigrationConfig, SourceOs};
-use tauri::State;
+use crate::config::{MigrationConfig, NotificationLevel, RobinConfig, SourceOs};
 use std::sync::Mutex;
+use tauri::{Emitter, State};
 
 pub struct AppState {
     pub config: Mutex<RobinConfig>,
@@ -8,14 +8,18 @@ pub struct AppState {
 
 #[tauri::command]
 pub fn get_config(state: State<'_, AppState>) -> Result<RobinConfig, String> {
-    state.config.lock()
+    state
+        .config
+        .lock()
         .map(|c| c.clone())
         .map_err(|e| e.to_string())
 }
 
 #[tauri::command]
 pub fn needs_onboarding(state: State<'_, AppState>) -> bool {
-    state.config.lock()
+    state
+        .config
+        .lock()
         .map(|c| c.needs_onboarding())
         .unwrap_or(true)
 }
@@ -33,11 +37,92 @@ pub fn complete_onboarding(
         _ => SourceOs::Unknown,
     };
 
+    let detected = if distro == "unknown" || distro.is_empty() {
+        crate::distro::detect()
+    } else {
+        distro
+    };
+
     let mut config = state.config.lock().map_err(|e| e.to_string())?;
     config.migration = Some(MigrationConfig {
         source_os: source,
-        distro,
+        distro: detected,
         fluency_level: 0,
     });
     config.save().map_err(|e| e.to_string())
 }
+
+#[tauri::command]
+pub fn update_notification_level(level: String, state: State<'_, AppState>) -> Result<(), String> {
+    let parsed = match level.as_str() {
+        "off" => NotificationLevel::Off,
+        "badge_only" => NotificationLevel::BadgeOnly,
+        "badge_and_toast" => NotificationLevel::BadgeAndToast,
+        _ => return Err(format!("unknown notification level: {level}")),
+    };
+    let mut config = state.config.lock().map_err(|e| e.to_string())?;
+    config.display.notification_level = parsed;
+    config.save().map_err(|e| e.to_string())
+}
+
+#[tauri::command]
+pub fn get_pending_events() -> Vec<crate::patterns::MatchedEvent> {
+    crate::notify::take_pending()
+}
+
+#[tauri::command]
+pub fn panel_opened() {
+    crate::notify::set_panel_open(true);
+}
+
+#[tauri::command]
+pub fn panel_closed() {
+    crate::notify::set_panel_open(false);
+}
+
+#[tauri::command]
+pub async fn chat(
+    message: String,
+    state: State<'_, AppState>,
+    app_handle: tauri::AppHandle,
+) -> Result<(), String> {
+    let (base_url, model, source_os, distro) = {
+        let cfg = state.config.lock().map_err(|e| e.to_string())?;
+        let base_url = cfg.ollama.base_url.clone();
+        let model = cfg.ollama.model.clone();
+        let (source_os, distro) = match cfg.migration.as_ref() {
+            Some(m) => {
+                let os = match m.source_os {
+                    crate::config::SourceOs::Macos => "macOS",
+                    crate::config::SourceOs::Windows => "Windows",
+                    crate::config::SourceOs::Linux => "Linux",
+                    crate::config::SourceOs::Unknown => "an unknown OS",
+                };
+                (os.to_string(), m.distro.clone())
+            }
+            None => ("an unknown OS".to_string(), "Linux".to_string()),
+        };
+        (base_url, model, source_os, distro)
+    };
+
+    let system_prompt = crate::llm::build_system_prompt(&source_os, &distro);
+    let messages = vec![
+        crate::llm::ChatMessage {
+            role: "system".into(),
+            content: system_prompt,
+        },
+        crate::llm::ChatMessage {
+            role: "user".into(),
+            content: message,
+        },
+    ];
+
+    tauri::async_runtime::spawn(async move {
+        if let Err(e) = crate::llm::chat_stream(&base_url, &model, messages, &app_handle).await {
+            log::error!("chat stream error: {e}");
+            let _ = app_handle.emit("robin:chat-error", e.to_string());
+        }
+    });
+
+    Ok(())
+}

src-tauri/src/config.rs

@@ -2,7 +2,7 @@ use anyhow::{Context, Result};
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
 #[serde(rename_all = "snake_case")]
 pub enum SourceOs {
     Macos,
@@ -11,6 +11,24 @@ pub enum SourceOs {
     Unknown,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum Tier {
+    #[default]
+    Free,
+    Paid,
+    Premium,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum NotificationLevel {
+    Off,
+    BadgeOnly,
+    #[default]
+    BadgeAndToast,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct MigrationConfig {
     pub source_os: SourceOs,
@@ -37,14 +55,15 @@ impl Default for OllamaConfig {
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct DisplayConfig {
-    pub show_notifications: bool,
+    #[serde(default)]
+    pub notification_level: NotificationLevel,
     pub quiet_mode: bool,
 }
 
 impl Default for DisplayConfig {
     fn default() -> Self {
         Self {
-            show_notifications: true,
+            notification_level: NotificationLevel::BadgeAndToast,
             quiet_mode: false,
         }
     }
@@ -55,6 +74,8 @@ pub struct RobinConfig {
     pub migration: Option<MigrationConfig>,
     pub ollama: OllamaConfig,
     pub display: DisplayConfig,
+    #[serde(default)]
+    pub tier: Tier,
 }
 
 impl Default for RobinConfig {
@@ -63,6 +84,7 @@ impl Default for RobinConfig {
             migration: None,
             ollama: OllamaConfig::default(),
             display: DisplayConfig::default(),
+            tier: Tier::Free,
         }
     }
 }
@@ -80,8 +102,7 @@ impl RobinConfig {
         }
         let content = std::fs::read_to_string(&path)
             .with_context(|| format!("failed to read {}", path.display()))?;
-        toml::from_str(&content)
-            .with_context(|| format!("failed to parse {}", path.display()))
+        toml::from_str(&content).with_context(|| format!("failed to parse {}", path.display()))
     }
 
     pub fn save(&self) -> Result<()> {
@@ -136,4 +157,36 @@ mod tests {
         let deserialized: RobinConfig = toml::from_str(&serialized).unwrap();
         assert!(!deserialized.needs_onboarding());
     }
+
+    #[test]
+    fn notification_level_default_is_badge_and_toast() {
+        let config = RobinConfig::default();
+        assert!(matches!(
+            config.display.notification_level,
+            NotificationLevel::BadgeAndToast
+        ));
+    }
+
+    #[test]
+    fn tier_default_is_free() {
+        let config = RobinConfig::default();
+        assert!(matches!(config.tier, Tier::Free));
+    }
+
+    #[test]
+    fn notification_level_roundtrips_toml() {
+        let config = RobinConfig {
+            display: DisplayConfig {
+                notification_level: NotificationLevel::BadgeOnly,
+                quiet_mode: false,
+            },
+            ..Default::default()
+        };
+        let toml = toml::to_string_pretty(&config).unwrap();
+        let back: RobinConfig = toml::from_str(&toml).unwrap();
+        assert!(matches!(
+            back.display.notification_level,
+            NotificationLevel::BadgeOnly
+        ));
+    }
 }

src-tauri/src/distro.rs

@@ -0,0 +1,88 @@
+pub fn detect() -> String {
+    std::fs::read_to_string("/etc/os-release")
+        .map(|s| parse_id(&s))
+        .unwrap_or_else(|_| "unknown".to_string())
+}
+
+pub fn distro_family(id: &str) -> &'static str {
+    match id {
+        "arch" | "cachyos" | "endeavouros" | "manjaro" | "garuda" => "arch",
+        "debian" | "ubuntu" | "linuxmint" | "mint" | "pop" | "elementary" | "kali" => "debian",
+        "fedora" | "rhel" | "centos" | "rocky" | "alma" => "fedora",
+        "opensuse" | "opensuse-tumbleweed" | "opensuse-leap" => "opensuse",
+        _ => "unknown",
+    }
+}
+
+fn parse_id(content: &str) -> String {
+    content
+        .lines()
+        .find_map(|line| {
+            let (key, val) = line.split_once('=')?;
+            if key.trim() == "ID" {
+                let raw = val.trim();
+                let unquoted = raw
+                    .strip_prefix('"')
+                    .and_then(|s| s.strip_suffix('"'))
+                    .or_else(|| raw.strip_prefix('\'').and_then(|s| s.strip_suffix('\'')))
+                    .unwrap_or(raw);
+                Some(unquoted.to_lowercase())
+            } else {
+                None
+            }
+        })
+        .unwrap_or_else(|| "unknown".to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_arch_id() {
+        let content = "ID=arch\nID_LIKE=\nPRETTY_NAME=Arch Linux\n";
+        assert_eq!(parse_id(content), "arch");
+    }
+
+    #[test]
+    fn parses_cachyos_id() {
+        let content = "ID=cachyos\nID_LIKE=arch\nPRETTY_NAME=CachyOS\n";
+        assert_eq!(parse_id(content), "cachyos");
+    }
+
+    #[test]
+    fn parses_linuxmint_id() {
+        let content = "ID=linuxmint\nID_LIKE=ubuntu\nPRETTY_NAME=Linux Mint 22\n";
+        assert_eq!(parse_id(content), "linuxmint");
+    }
+
+    #[test]
+    fn distro_family_arch_based() {
+        assert_eq!(distro_family("cachyos"), "arch");
+        assert_eq!(distro_family("arch"), "arch");
+        assert_eq!(distro_family("manjaro"), "arch");
+    }
+
+    #[test]
+    fn distro_family_debian_based() {
+        assert_eq!(distro_family("linuxmint"), "debian");
+        assert_eq!(distro_family("ubuntu"), "debian");
+        assert_eq!(distro_family("debian"), "debian");
+    }
+
+    #[test]
+    fn distro_family_unknown() {
+        assert_eq!(distro_family("slackware"), "unknown");
+    }
+
+    #[test]
+    fn parses_single_quoted_id() {
+        let content = "ID='arch'\nPRETTY_NAME='Arch Linux'\n";
+        assert_eq!(parse_id(content), "arch");
+    }
+
+    #[test]
+    fn distro_family_mint_legacy() {
+        assert_eq!(distro_family("mint"), "debian");
+    }
+}

src-tauri/src/lib.rs

@@ -1,11 +1,16 @@
 mod commands;
 mod config;
+mod distro;
+mod llm;
+mod notify;
+mod patterns;
 mod tray;
 mod watcher;
 
 use commands::AppState;
 use config::RobinConfig;
-use std::sync::Mutex;
+use std::sync::{Arc, Mutex};
+use tauri::Manager;
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
@@ -21,13 +26,58 @@ pub fn run() {
         })
         .setup(|app| {
             tray::build_tray(&app.handle())?;
-            watcher::spawn();
+
+            let state = app.state::<AppState>();
+            let cfg = state
+                .config
+                .lock()
+                .unwrap_or_else(|e| e.into_inner())
+                .clone();
+
+            let pattern_file = if let Some(ref migration) = cfg.migration {
+                let family = distro::distro_family(&migration.distro);
+                let source = match migration.source_os {
+                    config::SourceOs::Macos => "macos",
+                    config::SourceOs::Windows => "windows",
+                    config::SourceOs::Linux => "linux",
+                    config::SourceOs::Unknown => "unknown",
+                };
+                patterns::load(source, family).ok()
+            } else {
+                None
+            };
+
+            let log_paths = pattern_file
+                .as_ref()
+                .map(|pf| pf.log_paths.clone())
+                .unwrap_or_default();
+
+            let rx = watcher::spawn(log_paths);
+            let pf = Arc::new(pattern_file);
+            let app_handle = app.handle().clone();
+
+            tauri::async_runtime::spawn(async move {
+                let mut rx = rx;
+                while let Some(event) = rx.recv().await {
+                    if let Some(ref pf) = *pf {
+                        if let Some(matched) = patterns::classify(&event, pf) {
+                            notify::dispatch(&app_handle, matched);
+                        }
+                    }
+                }
+            });
+
             Ok(())
         })
         .invoke_handler(tauri::generate_handler![
             commands::get_config,
             commands::needs_onboarding,
             commands::complete_onboarding,
+            commands::update_notification_level,
+            commands::get_pending_events,
+            commands::panel_opened,
+            commands::panel_closed,
+            commands::chat,
         ])
         .run(tauri::generate_context!())
         .expect("error while running Robin");

src-tauri/src/llm.rs

@@ -0,0 +1,156 @@
+use anyhow::Context;
+use serde::{Deserialize, Serialize};
+use tauri::{AppHandle, Emitter};
+
+#[derive(Debug, Clone, Serialize)]
+pub struct ChatMessage {
+    pub role: String,
+    pub content: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct OllamaChunk {
+    message: Option<OllamaChunkMessage>,
+    done: bool,
+}
+
+#[derive(Debug, Deserialize)]
+struct OllamaChunkMessage {
+    content: String,
+}
+
+pub fn build_system_prompt(source_os: &str, distro: &str) -> String {
+    format!(
+        "You are Robin, a friendly Linux migration companion built into the user's desktop. \
+        The user migrated from {source_os} and is currently using {distro}. \
+        Help them with Linux questions. When concepts differ from their previous OS, \
+        explain the Linux equivalent clearly. Be concise, practical, and warm. \
+        Use plain language and avoid unexplained jargon. \
+        Never make the user feel bad for not knowing something."
+    )
+}
+
+pub async fn chat_stream(
+    base_url: &str,
+    model: &str,
+    messages: Vec<ChatMessage>,
+    app: &AppHandle,
+) -> anyhow::Result<()> {
+    let client = reqwest::Client::new();
+    let url = format!("{base_url}/api/chat");
+    let body = serde_json::json!({
+        "model": model,
+        "messages": messages,
+        "stream": true
+    });
+
+    let mut response = client
+        .post(&url)
+        .json(&body)
+        .send()
+        .await
+        .context("failed to reach Ollama — is it running at the configured URL?")?;
+
+    if !response.status().is_success() {
+        let status = response.status();
+        let text = response.text().await.unwrap_or_default();
+        anyhow::bail!("Ollama returned {status}: {text}");
+    }
+
+    let mut buffer: Vec<u8> = Vec::new();
+
+    loop {
+        match response.chunk().await {
+            Ok(Some(bytes)) => {
+                buffer.extend_from_slice(&bytes);
+                while let Some(nl) = buffer.iter().position(|&b| b == b'\n') {
+                    let line_bytes = buffer[..nl].to_vec();
+                    buffer.drain(..=nl);
+                    let line = String::from_utf8_lossy(&line_bytes);
+                    let line = line.trim();
+                    if line.is_empty() {
+                        continue;
+                    }
+                    match serde_json::from_str::<OllamaChunk>(line) {
+                        Ok(chunk) if chunk.done => {
+                            if let Err(e) = app.emit("robin:chat-done", ()) {
+                                log::warn!("llm: failed to emit chat-done: {e}");
+                            }
+                            return Ok(());
+                        }
+                        Ok(chunk) => {
+                            if let Some(msg) = chunk.message {
+                                if !msg.content.is_empty() {
+                                    if let Err(e) = app.emit("robin:chat-token", msg.content) {
+                                        log::warn!("llm: failed to emit chat-token: {e}");
+                                    }
+                                }
+                            }
+                        }
+                        Err(e) => {
+                            log::warn!("llm: failed to parse Ollama chunk: {e} — raw: {line}");
+                        }
+                    }
+                }
+            }
+            Ok(None) => break,
+            Err(e) => {
+                return Err(e).context("stream read error");
+            }
+        }
+    }
+
+    // Stream ended without a done:true line
+    if let Err(e) = app.emit("robin:chat-done", ()) {
+        log::warn!("llm: failed to emit chat-done: {e}");
+    }
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn prompt_includes_source_os_and_distro() {
+        let prompt = build_system_prompt("macOS", "cachyos");
+        assert!(prompt.contains("macOS"), "prompt must mention source OS");
+        assert!(prompt.contains("cachyos"), "prompt must mention distro");
+    }
+
+    #[test]
+    fn prompt_includes_robin_name() {
+        let prompt = build_system_prompt("Windows", "linuxmint");
+        assert!(prompt.contains("Robin"), "prompt must identify Robin as the assistant");
+    }
+
+    #[test]
+    fn parse_token_chunk() {
+        let json = r#"{"model":"llama3.2","created_at":"2024-01-01T00:00:00Z","message":{"role":"assistant","content":"Hello"},"done":false}"#;
+        let chunk: OllamaChunk = serde_json::from_str(json).unwrap();
+        assert!(!chunk.done);
+        assert_eq!(chunk.message.unwrap().content, "Hello");
+    }
+
+    #[test]
+    fn parse_done_chunk() {
+        let json = r#"{"model":"llama3.2","created_at":"2024-01-01T00:00:00Z","done":true,"done_reason":"stop"}"#;
+        let chunk: OllamaChunk = serde_json::from_str(json).unwrap();
+        assert!(chunk.done);
+        assert!(chunk.message.is_none());
+    }
+
+    #[test]
+    fn parse_empty_content_chunk_deserializes() {
+        let json = r#"{"model":"llama3.2","created_at":"2024-01-01T00:00:00Z","message":{"role":"assistant","content":""},"done":false}"#;
+        let chunk: OllamaChunk = serde_json::from_str(json).unwrap();
+        assert!(!chunk.done);
+        assert_eq!(chunk.message.unwrap().content, "");
+    }
+
+    #[test]
+    fn malformed_json_fails_to_parse() {
+        let result = serde_json::from_str::<OllamaChunk>("not valid json");
+        assert!(result.is_err(), "malformed JSON must fail to parse");
+    }
+}

src-tauri/src/main.rs

@@ -2,5 +2,5 @@
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
 fn main() {
-  app_lib::run();
+    app_lib::run();
 }

src-tauri/src/notify.rs

@@ -0,0 +1,95 @@
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Mutex;
+use tauri::{AppHandle, Emitter, Runtime};
+use tauri_plugin_notification::NotificationExt;
+
+use crate::commands::AppState;
+use crate::config::NotificationLevel;
+use crate::patterns::MatchedEvent;
+
+static PENDING: Mutex<Vec<MatchedEvent>> = Mutex::new(vec![]);
+// True while ChatPanel is mounted and listening for live events.
+// When true, dispatch skips PENDING so events are not shown twice on re-open.
+static PANEL_OPEN: AtomicBool = AtomicBool::new(false);
+
+pub fn set_panel_open(open: bool) {
+    PANEL_OPEN.store(open, Ordering::Relaxed);
+}
+
+pub fn dispatch<R: Runtime>(app: &AppHandle<R>, event: MatchedEvent) {
+    let level = app
+        .state::<AppState>()
+        .config
+        .lock()
+        .map(|c| c.display.notification_level.clone())
+        .unwrap_or_default();
+
+    if !PANEL_OPEN.load(Ordering::Relaxed) {
+        match PENDING.lock() {
+            Ok(mut pending) => pending.push(event.clone()),
+            Err(e) => log::warn!("notify: pending queue lock poisoned — event dropped: {e}"),
+        }
+    }
+
+    match level {
+        NotificationLevel::Off => {}
+        NotificationLevel::BadgeOnly => {
+            crate::tray::badge_on(app);
+        }
+        NotificationLevel::BadgeAndToast => {
+            crate::tray::badge_on(app);
+            send_toast(app, &event);
+        }
+    }
+
+    let _ = app.emit("robin:event", &event);
+}
+
+fn send_toast<R: Runtime>(app: &AppHandle<R>, event: &MatchedEvent) {
+    let _ = app
+        .notification()
+        .builder()
+        .title(&event.title)
+        .body(&event.body)
+        .show();
+}
+
+pub fn take_pending() -> Vec<MatchedEvent> {
+    PENDING
+        .lock()
+        .map(|mut v| std::mem::take(&mut *v))
+        .unwrap_or_default()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn make_event(id: &str) -> MatchedEvent {
+        MatchedEvent {
+            pattern_id: id.into(),
+            title: "Title".into(),
+            body: "Body".into(),
+            severity: "warn".into(),
+            timestamp: 0,
+        }
+    }
+
+    #[test]
+    fn take_pending_drains_queue() {
+        // Ensure clean state — drain any events from other tests sharing the static
+        let _ = take_pending();
+
+        if let Ok(mut q) = PENDING.lock() {
+            q.push(make_event("a"));
+            q.push(make_event("b"));
+        }
+
+        let first = take_pending();
+        assert_eq!(first.len(), 2);
+        assert_eq!(first[0].pattern_id, "a");
+
+        let second = take_pending();
+        assert!(second.is_empty(), "queue must be empty after drain");
+    }
+}

src-tauri/src/patterns.rs

@@ -0,0 +1,289 @@
+use crate::watcher::{EventSource, SystemEvent};
+use anyhow::{Context, Result};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct PatternMeta {
+    pub source_os: String,
+    pub target_distro_family: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct Pattern {
+    pub id: String,
+    pub sources: Vec<String>,
+    pub match_text: String,
+    pub severity: String,
+    pub title: String,
+    pub body: String,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct PatternFile {
+    pub meta: PatternMeta,
+    #[serde(default)]
+    pub log_paths: HashMap<String, String>,
+    #[serde(default)]
+    pub patterns: Vec<Pattern>,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct MatchedEvent {
+    pub pattern_id: String,
+    pub title: String,
+    pub body: String,
+    pub severity: String,
+    pub timestamp: u64,
+}
+
+/// Load the pattern file for a source OS and distro family.
+///
+/// Tries candidates in order: dev-relative path, src-tauri-relative path,
+/// system path. The Tauri resource directory is the authoritative location
+/// at runtime; passing a base path is handled in Task 10's caller via candidate list.
+pub fn load(source_os: &str, distro_family: &str) -> Result<PatternFile> {
+    let filename = format!("{source_os}-to-{distro_family}.toml");
+    let candidates = [
+        format!("patterns/{filename}"),
+        format!("src-tauri/patterns/{filename}"),
+        format!("/usr/share/robin/patterns/{filename}"),
+    ];
+    for path in &candidates {
+        let content = match std::fs::read_to_string(path) {
+            Ok(c) => c,
+            Err(_) => continue,
+        };
+        let pf: PatternFile = match toml::from_str(&content) {
+            Ok(p) => p,
+            Err(e) => {
+                log::warn!("patterns: failed to parse {path}: {e}");
+                continue;
+            }
+        };
+        for p in &pf.patterns {
+            anyhow::ensure!(
+                !p.match_text.is_empty(),
+                "pattern '{}' has empty match_text in {path}",
+                p.id
+            );
+            anyhow::ensure!(
+                !p.sources.is_empty(),
+                "pattern '{}' has empty sources list in {path}",
+                p.id
+            );
+        }
+        return Ok(pf);
+    }
+    anyhow::bail!("pattern file not found: {filename}")
+}
+
+#[must_use]
+pub fn classify(event: &SystemEvent, pf: &PatternFile) -> Option<MatchedEvent> {
+    for pattern in &pf.patterns {
+        if !event.raw_line.contains(&pattern.match_text) {
+            continue;
+        }
+
+        let source_matches = pattern.sources.iter().any(|s| {
+            if s == "any" {
+                return true;
+            }
+            match &event.source {
+                EventSource::Journald => s == "journald",
+                EventSource::Kmsg => s == "kmsg",
+                EventSource::AppLog { app } => s == &format!("applog:{app}"),
+            }
+        });
+
+        if source_matches {
+            return Some(MatchedEvent {
+                pattern_id: pattern.id.clone(),
+                title: pattern.title.clone(),
+                body: pattern.body.clone(),
+                severity: pattern.severity.clone(),
+                timestamp: event.timestamp,
+            });
+        }
+    }
+    None
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::watcher::{EventSource, SystemEvent};
+
+    const FIXTURE: &str = r#"
+[meta]
+source_os = "macos"
+target_distro_family = "arch"
+
+[log_paths]
+steam = "~/.local/share/Steam/logs/content_log.txt"
+
+[[patterns]]
+id = "aur-build-failure"
+sources = ["journald"]
+match_text = "error: failed to build"
+severity = "warn"
+title = "AUR package build failed"
+body = "A package failed to compile from source."
+
+[[patterns]]
+id = "proton-runtime"
+sources = ["applog:steam"]
+match_text = "wine: cannot find"
+severity = "warn"
+title = "Proton runtime issue"
+body = "Steam Proton couldn't find a required file."
+
+[[patterns]]
+id = "any-source-pattern"
+sources = ["any"]
+match_text = "kernel panic"
+severity = "crit"
+title = "Kernel panic"
+body = "The kernel encountered a fatal error."
+"#;
+
+    fn make_event(source: EventSource, raw_line: &str) -> SystemEvent {
+        SystemEvent {
+            source,
+            raw_line: raw_line.into(),
+            timestamp: 0,
+        }
+    }
+
+    #[test]
+    fn loads_pattern_file_from_toml() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        assert_eq!(pf.meta.source_os, "macos");
+        assert_eq!(pf.patterns.len(), 3);
+        assert_eq!(
+            pf.log_paths.get("steam").unwrap(),
+            "~/.local/share/Steam/logs/content_log.txt"
+        );
+    }
+
+    #[test]
+    fn classify_matches_journald_event() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(EventSource::Journald, ":: error: failed to build (foo-git)");
+        let matched = classify(&event, &pf).unwrap();
+        assert_eq!(matched.pattern_id, "aur-build-failure");
+        assert_eq!(matched.title, "AUR package build failed");
+    }
+
+    #[test]
+    fn classify_no_match_returns_none() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(
+            EventSource::Journald,
+            "systemd: Started NetworkManager.service",
+        );
+        assert!(classify(&event, &pf).is_none());
+    }
+
+    #[test]
+    fn classify_applog_matches_correct_source() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(
+            EventSource::AppLog {
+                app: "steam".into(),
+            },
+            "wine: cannot find /run/media/user/game.exe",
+        );
+        let matched = classify(&event, &pf).unwrap();
+        assert_eq!(matched.pattern_id, "proton-runtime");
+    }
+
+    #[test]
+    fn classify_does_not_match_wrong_source() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        // proton pattern is applog:steam — journald event must not match
+        let event = make_event(EventSource::Journald, "wine: cannot find something");
+        assert!(classify(&event, &pf).is_none());
+    }
+
+    #[test]
+    fn classify_applog_does_not_match_different_app() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(
+            EventSource::AppLog {
+                app: "retroarch".into(),
+            },
+            "wine: cannot find libvulkan.so",
+        );
+        assert!(classify(&event, &pf).is_none());
+    }
+
+    #[test]
+    fn classify_any_source_matches_kmsg() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(EventSource::Kmsg, "kernel panic - not syncing: VFS");
+        let matched = classify(&event, &pf).unwrap();
+        assert_eq!(matched.pattern_id, "any-source-pattern");
+    }
+
+    #[test]
+    fn classify_any_source_matches_journald() {
+        let pf: PatternFile = toml::from_str(FIXTURE).unwrap();
+        let event = make_event(EventSource::Journald, "kernel panic - not syncing: VFS");
+        let matched = classify(&event, &pf).unwrap();
+        assert_eq!(matched.pattern_id, "any-source-pattern");
+    }
+
+    #[test]
+    fn load_rejects_empty_match_text() {
+        let bad = r#"
+[meta]
+source_os = "macos"
+target_distro_family = "arch"
+
+[[patterns]]
+id = "bad"
+sources = ["journald"]
+match_text = ""
+severity = "warn"
+title = "Bad"
+body = "Bad pattern."
+"#;
+        let pf: PatternFile = toml::from_str(bad).unwrap();
+        // Validate manually since load() reads from filesystem; test the invariant directly
+        let result: anyhow::Result<()> = (|| {
+            for p in &pf.patterns {
+                anyhow::ensure!(!p.match_text.is_empty(), "empty match_text in '{}'", p.id);
+            }
+            Ok(())
+        })();
+        assert!(result.is_err());
+        assert!(result.unwrap_err().to_string().contains("empty match_text"));
+    }
+
+    #[test]
+    fn load_rejects_empty_sources() {
+        let bad = r#"
+[meta]
+source_os = "macos"
+target_distro_family = "arch"
+
+[[patterns]]
+id = "bad"
+sources = []
+match_text = "something"
+severity = "warn"
+title = "Bad"
+body = "Bad pattern."
+"#;
+        let pf: PatternFile = toml::from_str(bad).unwrap();
+        let result: anyhow::Result<()> = (|| {
+            for p in &pf.patterns {
+                anyhow::ensure!(!p.sources.is_empty(), "empty sources in '{}'", p.id);
+            }
+            Ok(())
+        })();
+        assert!(result.is_err());
+        assert!(result.unwrap_err().to_string().contains("empty sources"));
+    }
+}

src-tauri/src/tray.rs

@@ -1,3 +1,4 @@
+use std::sync::atomic::{AtomicBool, Ordering};
 use tauri::{
     menu::{Menu, MenuItem},
     tray::{MouseButton, MouseButtonState, TrayIconBuilder, TrayIconEvent},
@@ -34,7 +35,7 @@ pub fn build_tray<R: Runtime>(app: &AppHandle<R>) -> tauri::Result<()> {
     Ok(())
 }
 
-fn toggle_chat_panel<R: Runtime>(app: &AppHandle<R>) {
+pub fn toggle_chat_panel<R: Runtime>(app: &AppHandle<R>) {
     if let Some(window) = app.get_webview_window("chat") {
         if window.is_visible().unwrap_or(false) {
             let _ = window.hide();
@@ -44,3 +45,32 @@ fn toggle_chat_panel<R: Runtime>(app: &AppHandle<R>) {
         }
     }
 }
+
+static BADGE_ACTIVE: AtomicBool = AtomicBool::new(false);
+
+pub fn badge_on<R: Runtime>(app: &AppHandle<R>) {
+    if BADGE_ACTIVE.swap(true, Ordering::Relaxed) {
+        return; // already badged
+    }
+    if let Some(tray) = app.tray_by_id("robin-tray") {
+        if let Some(icon) = app.default_window_icon().cloned() {
+            let _ = tray.set_icon(Some(icon));
+        }
+        let _ = tray.set_tooltip(Some("Robin — something to show you"));
+    }
+}
+
+pub fn badge_off<R: Runtime>(app: &AppHandle<R>) {
+    BADGE_ACTIVE.store(false, Ordering::Relaxed);
+    if let Some(tray) = app.tray_by_id("robin-tray") {
+        if let Some(icon) = app.default_window_icon().cloned() {
+            let _ = tray.set_icon(Some(icon));
+        }
+        let _ = tray.set_tooltip(Some("Robin"));
+    }
+}
+
+pub fn clear_badge_and_open<R: Runtime>(app: &AppHandle<R>) {
+    badge_off(app);
+    toggle_chat_panel(app);
+}

src-tauri/src/watcher.rs

@@ -1,32 +0,0 @@
-/// System event watcher — M1 implementation.
-///
-/// M0 stub: defines the types and the spawn interface so the rest of the app
-/// can wire up event handling now. Actual journald/dmesg reading lands in M1.
-
-use serde::{Deserialize, Serialize};
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "snake_case")]
-pub enum EventSeverity {
-    Info,
-    Warn,
-    Crit,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct SystemEvent {
-    pub severity: EventSeverity,
-    pub source: String,
-    pub message: String,
-    pub timestamp: u64,
-}
-
-/// Starts the background watcher task.
-/// M0: no-op placeholder — returns immediately.
-/// M1: spawns a tokio task reading journald + dmesg and emitting events.
-pub fn spawn() {
-    // TODO(M1): spawn tokio::task reading journald via sd-journal crate
-    // TODO(M1): spawn dmesg poller for kernel messages
-    // TODO(M1): emit SystemEvent via tauri app_handle.emit()
-    log::info!("watcher: stub — no-op until M1");
-}

src-tauri/src/watcher/inotify.rs

@@ -0,0 +1,124 @@
+use super::{now_unix, EventSource, SystemEvent};
+use notify::{recommended_watcher, RecursiveMode, Watcher};
+use std::collections::HashMap;
+use std::io::{Read, Seek};
+use tokio::sync::mpsc;
+
+pub async fn watch(log_paths: HashMap<String, String>, tx: mpsc::Sender<SystemEvent>) {
+    if log_paths.is_empty() {
+        return;
+    }
+
+    let expanded: HashMap<String, String> = log_paths
+        .iter()
+        .map(|(k, v)| (k.clone(), expand_tilde(v)))
+        .collect();
+
+    tokio::task::spawn_blocking(move || {
+        let (notify_tx, notify_rx) = std::sync::mpsc::channel();
+        let mut watcher = match recommended_watcher(notify_tx) {
+            Ok(w) => w,
+            Err(e) => {
+                log::error!("inotify watcher init failed: {e}");
+                return;
+            }
+        };
+
+        // positions: path -> (app_name, byte_offset)
+        let mut positions: HashMap<String, (String, u64)> = HashMap::new();
+
+        for (app_name, path) in &expanded {
+            let pb = std::path::Path::new(path);
+            if pb.exists() {
+                let len = std::fs::metadata(pb).map(|m| m.len()).unwrap_or(0);
+                positions.insert(path.clone(), (app_name.clone(), len));
+                watcher.watch(pb, RecursiveMode::NonRecursive).ok();
+            }
+        }
+
+        for result in notify_rx {
+            if let Ok(event) = result {
+                for path in event.paths {
+                    let path_str = path.to_string_lossy().to_string();
+                    if let Some((app_name, pos)) = positions.get_mut(&path_str) {
+                        let (lines, new_pos) = read_new_lines(&path_str, *pos);
+                        *pos = new_pos;
+                        for line in lines {
+                            tx.blocking_send(SystemEvent {
+                                source: EventSource::AppLog {
+                                    app: app_name.clone(),
+                                },
+                                raw_line: line,
+                                timestamp: now_unix(),
+                            })
+                            .ok();
+                        }
+                    }
+                }
+            }
+        }
+    })
+    .await
+    .ok();
+}
+
+pub fn expand_tilde(path: &str) -> String {
+    if let Some(rest) = path.strip_prefix("~/") {
+        let home = std::env::var("HOME").unwrap_or_else(|_| "/home/user".into());
+        format!("{home}/{rest}")
+    } else {
+        path.to_string()
+    }
+}
+
+pub fn read_new_lines(path: &str, from_byte: u64) -> (Vec<String>, u64) {
+    let mut file = match std::fs::File::open(path) {
+        Ok(f) => f,
+        Err(_) => return (vec![], from_byte),
+    };
+    if file.seek(std::io::SeekFrom::Start(from_byte)).is_err() {
+        return (vec![], from_byte);
+    }
+    let mut raw = Vec::new();
+    let bytes_read = file.read_to_end(&mut raw).unwrap_or(0);
+    let content = String::from_utf8_lossy(&raw).into_owned();
+    let new_pos = from_byte + bytes_read as u64;
+    let lines: Vec<String> = content
+        .lines()
+        .filter(|l| !l.is_empty())
+        .map(|l| l.to_string())
+        .collect();
+    (lines, new_pos)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn expand_tilde_home() {
+        let home = std::env::var("HOME").unwrap_or("/home/user".into());
+        let expanded = expand_tilde("~/.config/retroarch/retroarch.log");
+        assert!(expanded.starts_with(&home));
+        assert!(expanded.ends_with(".config/retroarch/retroarch.log"));
+    }
+
+    #[test]
+    fn expand_tilde_no_tilde() {
+        let path = "/absolute/path/to/file.log";
+        assert_eq!(expand_tilde(path), path);
+    }
+
+    #[tokio::test]
+    async fn reads_new_lines_from_file() {
+        use std::io::Write;
+        let dir = tempfile::tempdir().unwrap();
+        let path = dir.path().join("test.log");
+        let mut f = std::fs::File::create(&path).unwrap();
+        write!(f, "line one\n").unwrap();
+
+        let (lines, pos) = read_new_lines(path.to_str().unwrap(), 0);
+        assert_eq!(lines, vec!["line one".to_string()]);
+        assert!(pos > 0);
+    }
+}

src-tauri/src/watcher/journald.rs

@@ -0,0 +1,74 @@
+use super::{now_unix, EventSource, SystemEvent};
+use tokio::io::{AsyncBufReadExt, BufReader};
+use tokio::process::Command;
+use tokio::sync::mpsc;
+
+pub async fn watch(tx: mpsc::Sender<SystemEvent>) {
+    let mut child = match Command::new("journalctl")
+        .args(["--follow", "--output=json", "--lines=0"])
+        .stdout(std::process::Stdio::piped())
+        .spawn()
+    {
+        Ok(c) => c,
+        Err(e) => {
+            log::error!("journald watcher: failed to spawn journalctl: {e}");
+            return;
+        }
+    };
+
+    let stdout = match child.stdout.take() {
+        Some(s) => s,
+        None => return,
+    };
+
+    let mut lines = BufReader::new(stdout).lines();
+    while let Ok(Some(line)) = lines.next_line().await {
+        if let Some(msg) = extract_message(&line) {
+            let _ = tx
+                .send(SystemEvent {
+                    source: EventSource::Journald,
+                    raw_line: msg,
+                    timestamp: now_unix(),
+                })
+                .await;
+        }
+    }
+
+    log::warn!("journald watcher: journalctl exited — no new journal events will be observed");
+    let _ = child.wait().await;
+}
+
+fn extract_message(line: &str) -> Option<String> {
+    let json: serde_json::Value = serde_json::from_str(line).ok()?;
+    let msg = json.get("MESSAGE")?.as_str()?;
+    if msg.is_empty() {
+        return None;
+    }
+    Some(msg.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn extract_message_from_journald_json() {
+        let line = r#"{"MESSAGE":"AUR build failed for foo","PRIORITY":"3","_COMM":"makepkg"}"#;
+        assert_eq!(
+            extract_message(line),
+            Some("AUR build failed for foo".to_string())
+        );
+    }
+
+    #[test]
+    fn extract_message_missing_returns_none() {
+        let line = r#"{"PRIORITY":"6","_COMM":"systemd"}"#;
+        assert_eq!(extract_message(line), None);
+    }
+
+    #[test]
+    fn extract_message_empty_skipped() {
+        let line = r#"{"MESSAGE":"","PRIORITY":"6"}"#;
+        assert_eq!(extract_message(line), None);
+    }
+}

src-tauri/src/watcher/kmsg.rs

@@ -0,0 +1,68 @@
+use super::{now_unix, EventSource, SystemEvent};
+use tokio::fs::File;
+use tokio::io::{AsyncBufReadExt, BufReader};
+use tokio::sync::mpsc;
+
+pub async fn watch(tx: mpsc::Sender<SystemEvent>) {
+    let file = match File::open("/dev/kmsg").await {
+        Ok(f) => f,
+        Err(e) => {
+            log::warn!("kmsg watcher: cannot open /dev/kmsg: {e}");
+            return;
+        }
+    };
+
+    let mut lines = BufReader::new(file).lines();
+    while let Ok(Some(line)) = lines.next_line().await {
+        if let Some(msg) = parse_kmsg(&line) {
+            let _ = tx
+                .send(SystemEvent {
+                    source: EventSource::Kmsg,
+                    raw_line: msg,
+                    timestamp: now_unix(),
+                })
+                .await;
+        }
+    }
+}
+
+fn parse_kmsg(line: &str) -> Option<String> {
+    let msg = if let Some(pos) = line.find(';') {
+        &line[pos + 1..]
+    } else {
+        line
+    };
+    if msg.is_empty() {
+        return None;
+    }
+    Some(msg.to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parses_kmsg_line_with_semicolon() {
+        let line = "6,1234,56789,-;usb 1-1: new full-speed USB device number 2";
+        assert_eq!(
+            parse_kmsg(line),
+            Some("usb 1-1: new full-speed USB device number 2".to_string())
+        );
+    }
+
+    #[test]
+    fn parses_kmsg_line_without_semicolon() {
+        let line = "plain message without header";
+        assert_eq!(
+            parse_kmsg(line),
+            Some("plain message without header".to_string())
+        );
+    }
+
+    #[test]
+    fn skips_empty_message_after_semicolon() {
+        let line = "6,1234,56789,-;";
+        assert_eq!(parse_kmsg(line), None);
+    }
+}

src-tauri/src/watcher/mod.rs

@@ -0,0 +1,85 @@
+pub mod inotify;
+pub mod journald;
+pub mod kmsg;
+
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::time::{SystemTime, UNIX_EPOCH};
+use tokio::sync::mpsc;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum EventSeverity {
+    Info,
+    Warn,
+    Crit,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+pub enum EventSource {
+    Journald,
+    Kmsg,
+    AppLog { app: String },
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct SystemEvent {
+    pub source: EventSource,
+    pub raw_line: String,
+    pub timestamp: u64,
+}
+
+pub fn now_unix() -> u64 {
+    SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .as_secs()
+}
+
+/// Spawns all watcher tasks. Returns the receiver end of the event channel.
+/// `log_paths` comes from the loaded PatternFile.
+pub fn spawn(log_paths: HashMap<String, String>) -> mpsc::Receiver<SystemEvent> {
+    let (tx, rx) = mpsc::channel::<SystemEvent>(256);
+
+    let tx_j = tx.clone();
+    tauri::async_runtime::spawn(async move {
+        journald::watch(tx_j).await;
+    });
+
+    let tx_k = tx.clone();
+    tauri::async_runtime::spawn(async move {
+        kmsg::watch(tx_k).await;
+    });
+
+    tauri::async_runtime::spawn(async move {
+        inotify::watch(log_paths, tx).await;
+    });
+
+    rx
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn event_source_can_be_cloned() {
+        let s = EventSource::AppLog {
+            app: "steam".into(),
+        };
+        let _ = s.clone();
+        assert!(matches!(s, EventSource::AppLog { .. }));
+    }
+
+    #[test]
+    fn system_event_constructed() {
+        let e = SystemEvent {
+            source: EventSource::Journald,
+            raw_line: "test line".into(),
+            timestamp: now_unix(),
+        };
+        assert_eq!(e.raw_line, "test line");
+        assert!(e.timestamp > 0);
+    }
+}

src-tauri/tauri.conf.json

@@ -38,6 +38,9 @@
   "bundle": {
     "active": true,
     "targets": ["deb", "rpm", "appimage"],
+    "resources": {
+      "patterns/*": "patterns/"
+    },
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",

src/components/ChatPanel.vue

@@ -26,30 +26,111 @@
         class="chat-input"
         placeholder="Ask Robin something..."
         @keydown.enter="send"
+        :disabled="thinking"
       />
-      <button class="send-btn" @click="send">→</button>
+      <button class="send-btn" @click="send" :disabled="thinking">
+        {{ thinking ? '…' : '→' }}
+      </button>
     </footer>
   </div>
 </template>
 
 <script setup lang="ts">
-import { ref, nextTick } from 'vue'
+import { ref, nextTick, onMounted, onUnmounted } from 'vue'
+import { invoke } from '@tauri-apps/api/core'
+import { listen, type UnlistenFn } from '@tauri-apps/api/event'
 
 interface Message { role: 'user' | 'robin'; content: string }
+interface RobinEvent { pattern_id: string; title: string; body: string; severity: string; timestamp: number }
 
 const messages = ref<Message[]>([])
 const input = ref('')
+const thinking = ref(false)
 const messagesEl = ref<HTMLElement | null>(null)
+let unlisten: UnlistenFn | null = null
+let activeCleanup: (() => void) | null = null
+
+onMounted(async () => {
+  try { await invoke('panel_opened') } catch {}
+
+  try {
+    const pending = await invoke<RobinEvent[]>('get_pending_events')
+    for (const e of pending) {
+      pushRobinEvent(e)
+    }
+  } catch (err) {
+    console.warn('Robin: failed to drain pending events:', err)
+  }
+
+  unlisten = await listen<RobinEvent>('robin:event', ({ payload }) => {
+    pushRobinEvent(payload)
+  })
+})
+
+onUnmounted(() => {
+  unlisten?.()
+  invoke('panel_closed').catch(() => {})
+  activeCleanup?.()
+})
+
+function pushRobinEvent(e: RobinEvent) {
+  messages.value.push({ role: 'robin', content: `**${e.title}**\n\n${e.body}` })
+  nextTick(() => {
+    messagesEl.value?.scrollTo({ top: messagesEl.value.scrollHeight, behavior: 'smooth' })
+  })
+}
 
 async function send() {
   const text = input.value.trim()
-  if (!text) return
+  if (!text || thinking.value) return
   input.value = ''
+  thinking.value = true
+
   messages.value.push({ role: 'user', content: text })
-  // M4: invoke('chat', { message: text }) and stream response
-  messages.value.push({ role: 'robin', content: '(LLM chat not yet connected — M4)' })
+  messages.value.push({ role: 'robin', content: '' })
+  const robinIdx = messages.value.length - 1
+
   await nextTick()
   messagesEl.value?.scrollTo({ top: messagesEl.value.scrollHeight, behavior: 'smooth' })
+
+  let unlistenToken: UnlistenFn | null = null
+  let unlistenDone: UnlistenFn | null = null
+  let unlistenError: UnlistenFn | null = null
+
+  function cleanup() {
+    unlistenToken?.()
+    unlistenDone?.()
+    unlistenError?.()
+    thinking.value = false
+    activeCleanup = null
+  }
+  activeCleanup = cleanup
+
+  unlistenToken = await listen<string>('robin:chat-token', ({ payload }) => {
+    messages.value[robinIdx].content += payload
+    nextTick(() => {
+      messagesEl.value?.scrollTo({ top: messagesEl.value.scrollHeight, behavior: 'smooth' })
+    })
+  })
+
+  unlistenDone = await listen('robin:chat-done', () => cleanup())
+
+  unlistenError = await listen<string>('robin:chat-error', ({ payload }) => {
+    if (!messages.value[robinIdx].content) {
+      messages.value[robinIdx].content =
+        `Robin couldn't reach Ollama. Make sure it's running at the configured URL. (${payload})`
+    }
+    cleanup()
+  })
+
+  try {
+    await invoke('chat', { message: text })
+  } catch (err) {
+    if (!messages.value[robinIdx].content) {
+      messages.value[robinIdx].content = `Something went wrong starting the chat. (${err})`
+    }
+    cleanup()
+  }
 }
 </script>
 
@@ -117,4 +198,6 @@ async function send() {
   cursor: pointer;
 }
 .send-btn:hover { opacity: 0.85; }
+.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }
+.chat-input:disabled { opacity: 0.6; cursor: not-allowed; }
 </style>