feat(browser): add optional computer-use sidecar backend (#335)

src/config/schema.rs

@@ -419,6 +419,53 @@ impl Default for SecretsConfig {
 
 // ── Browser (friendly-service browsing only) ───────────────────
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BrowserComputerUseConfig {
+    /// Sidecar endpoint for computer-use actions (OS-level mouse/keyboard/screenshot)
+    #[serde(default = "default_browser_computer_use_endpoint")]
+    pub endpoint: String,
+    /// Optional bearer token for computer-use sidecar
+    #[serde(default)]
+    pub api_key: Option<String>,
+    /// Per-action request timeout in milliseconds
+    #[serde(default = "default_browser_computer_use_timeout_ms")]
+    pub timeout_ms: u64,
+    /// Allow remote/public endpoint for computer-use sidecar (default: false)
+    #[serde(default)]
+    pub allow_remote_endpoint: bool,
+    /// Optional window title/process allowlist forwarded to sidecar policy
+    #[serde(default)]
+    pub window_allowlist: Vec<String>,
+    /// Optional X-axis boundary for coordinate-based actions
+    #[serde(default)]
+    pub max_coordinate_x: Option<i64>,
+    /// Optional Y-axis boundary for coordinate-based actions
+    #[serde(default)]
+    pub max_coordinate_y: Option<i64>,
+}
+
+fn default_browser_computer_use_endpoint() -> String {
+    "http://127.0.0.1:8787/v1/actions".into()
+}
+
+fn default_browser_computer_use_timeout_ms() -> u64 {
+    15_000
+}
+
+impl Default for BrowserComputerUseConfig {
+    fn default() -> Self {
+        Self {
+            endpoint: default_browser_computer_use_endpoint(),
+            api_key: None,
+            timeout_ms: default_browser_computer_use_timeout_ms(),
+            allow_remote_endpoint: false,
+            window_allowlist: Vec::new(),
+            max_coordinate_x: None,
+            max_coordinate_y: None,
+        }
+    }
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct BrowserConfig {
     /// Enable `browser_open` tool (opens URLs in Brave without scraping)
@@ -430,7 +477,7 @@ pub struct BrowserConfig {
     /// Browser session name (for agent-browser automation)
     #[serde(default)]
     pub session_name: Option<String>,
-    /// Browser automation backend: "agent_browser" | "rust_native" | "auto"
+    /// Browser automation backend: "agent_browser" | "rust_native" | "computer_use" | "auto"
     #[serde(default = "default_browser_backend")]
     pub backend: String,
     /// Headless mode for rust-native backend
@@ -442,6 +489,9 @@ pub struct BrowserConfig {
     /// Optional Chrome/Chromium executable path for rust-native backend
     #[serde(default)]
     pub native_chrome_path: Option<String>,
+    /// Computer-use sidecar configuration
+    #[serde(default)]
+    pub computer_use: BrowserComputerUseConfig,
 }
 
 fn default_browser_backend() -> String {
@@ -462,6 +512,7 @@ impl Default for BrowserConfig {
             native_headless: default_true(),
             native_webdriver_url: default_browser_webdriver_url(),
             native_chrome_path: None,
+            computer_use: BrowserComputerUseConfig::default(),
         }
     }
 }
@@ -2334,6 +2385,12 @@ default_temperature = 0.7
         assert!(b.native_headless);
         assert_eq!(b.native_webdriver_url, "http://127.0.0.1:9515");
         assert!(b.native_chrome_path.is_none());
+        assert_eq!(b.computer_use.endpoint, "http://127.0.0.1:8787/v1/actions");
+        assert_eq!(b.computer_use.timeout_ms, 15_000);
+        assert!(!b.computer_use.allow_remote_endpoint);
+        assert!(b.computer_use.window_allowlist.is_empty());
+        assert!(b.computer_use.max_coordinate_x.is_none());
+        assert!(b.computer_use.max_coordinate_y.is_none());
     }
 
     #[test]
@@ -2346,6 +2403,15 @@ default_temperature = 0.7
             native_headless: false,
             native_webdriver_url: "http://localhost:4444".into(),
             native_chrome_path: Some("/usr/bin/chromium".into()),
+            computer_use: BrowserComputerUseConfig {
+                endpoint: "https://computer-use.example.com/v1/actions".into(),
+                api_key: Some("test-token".into()),
+                timeout_ms: 8_000,
+                allow_remote_endpoint: true,
+                window_allowlist: vec!["Chrome".into(), "Visual Studio Code".into()],
+                max_coordinate_x: Some(3840),
+                max_coordinate_y: Some(2160),
+            },
         };
         let toml_str = toml::to_string(&b).unwrap();
         let parsed: BrowserConfig = toml::from_str(&toml_str).unwrap();
@@ -2359,6 +2425,16 @@ default_temperature = 0.7
             parsed.native_chrome_path.as_deref(),
             Some("/usr/bin/chromium")
         );
+        assert_eq!(
+            parsed.computer_use.endpoint,
+            "https://computer-use.example.com/v1/actions"
+        );
+        assert_eq!(parsed.computer_use.api_key.as_deref(), Some("test-token"));
+        assert_eq!(parsed.computer_use.timeout_ms, 8_000);
+        assert!(parsed.computer_use.allow_remote_endpoint);
+        assert_eq!(parsed.computer_use.window_allowlist.len(), 2);
+        assert_eq!(parsed.computer_use.max_coordinate_x, Some(3840));
+        assert_eq!(parsed.computer_use.max_coordinate_y, Some(2160));
     }
 
     #[test]