File watcher

Author: kennvene-aws

Cargo.lock

@@ -59,13 +59,15 @@ http = "1.2.0"
 http-body-util = "0.1.3"
 hyper = { version = "1.6.0", features = ["server"] }
 hyper-util = { version = "0.1.11", features = ["tokio"] }
+ignore = "0.4.24"
 indicatif = "0.17.11"
 indoc = "2.0.6"
 insta = "1.43.1"
 libc = "0.2.172"
 mimalloc = "0.1.46"
 mockito = "1.7.0"
 nix = { version = "0.29.0", features = ["feature", "fs", "ioctl", "process", "signal", "term", "user"] }
+notify = "8.2.0"
 objc2 = "0.5.2"
 objc2-app-kit = { version = "0.2.2", features = ["NSWorkspace"] }
 objc2-foundation = { version = "0.2.2", features = ["NSString", "NSURL"] }

Cargo.toml

@@ -11,6 +11,7 @@ pub struct LanguageConfig {
     pub args: Vec<String>,
     pub file_extensions: Vec<String>,
     pub project_patterns: Vec<String>,
+    pub exclude_patterns: Vec<String>,
     pub initialization_options: Option<Value>,
 }
 
@@ -66,6 +67,7 @@ impl LanguagesConfig {
             command: config.command.clone(),
             args: config.args.clone(),
             file_extensions: config.file_extensions.clone(),
+            exclude_patterns: config.exclude_patterns.clone(),
             initialization_options: config.initialization_options.clone(),
         })
     }
@@ -79,6 +81,7 @@ impl LanguagesConfig {
                 command: config.command.clone(),
                 args: config.args.clone(),
                 file_extensions: config.file_extensions.clone(),
+                exclude_patterns: config.exclude_patterns.clone(),
                 initialization_options: config.initialization_options.clone(),
             })
             .collect()
@@ -108,6 +111,7 @@ impl LanguagesConfig {
                     "args": ["--stdio"],
                     "file_extensions": ["ts", "js", "tsx", "jsx"],
                     "project_patterns": ["package.json", "tsconfig.json"],
+                    "exclude_patterns": ["**/node_modules/**", "**/dist/**"],
                     "initialization_options": {
                         "preferences": {
                             "disableSuggestions": false
@@ -120,6 +124,7 @@ impl LanguagesConfig {
                     "args": [],
                     "file_extensions": ["rs"],
                     "project_patterns": ["Cargo.toml"],
+                    "exclude_patterns": ["**/target/**"],
                     "initialization_options": {
                         "cargo": {
                             "buildScripts": {
@@ -134,6 +139,7 @@ impl LanguagesConfig {
                     "args": [],
                     "file_extensions": ["py"],
                     "project_patterns": ["pyproject.toml", "setup.py"],
+                    "exclude_patterns": ["**/__pycache__/**", "**/venv/**"],
                     "initialization_options": {}
                 }
             }

crates/code-agent-sdk/src/config/json_config.rs

@@ -89,6 +89,7 @@ mod tests {
             command: format!("{}-lsp", name),
             args: vec!["--stdio".to_string()],
             file_extensions: extensions.iter().map(|s| s.to_string()).collect(),
+            exclude_patterns: vec!["**/test/**".to_string()],
             initialization_options: None,
         }
     }

crates/code-agent-sdk/src/lsp/lsp_registry.rs

@@ -13,3 +13,6 @@ pub use types::{
     FormatCodeRequest, GetDocumentSymbolsRequest, GetSymbolsRequest, GotoDefinitionRequest,
     LanguageServerConfig, LspInfo, OpenFileRequest, RenameSymbolRequest, WorkspaceInfo,
 };
+
+// Re-export crate-internal types
+pub(crate) use types::{FsEvent, FsEventKind};

crates/code-agent-sdk/src/model/mod.rs

@@ -196,6 +196,8 @@ pub struct LanguageServerConfig {
     pub args: Vec<String>,
     /// File extensions this language server handles (e.g., ["rs", "toml"])
     pub file_extensions: Vec<String>,
+    /// Patterns to exclude from file watching (e.g., ["**/target/**", "**/node_modules/**"])
+    pub exclude_patterns: Vec<String>,
     /// Optional initialization options sent to the language server
     pub initialization_options: Option<serde_json::Value>,
 }
@@ -232,3 +234,24 @@ pub struct LspInfo {
     pub version: Option<String>,
 }
 
+// ============================================================================
+// File Watching Types (Crate Internal)
+// ============================================================================
+
+/// File system event for internal file watching system
+#[derive(Debug, Clone)]
+pub(crate) struct FsEvent {
+    pub(crate) uri: url::Url,
+    pub(crate) kind: FsEventKind,
+    pub(crate) timestamp: std::time::Instant,
+}
+
+/// Types of file system events
+#[derive(Debug, Clone, PartialEq)]
+pub(crate) enum FsEventKind {
+    Created,
+    Modified,
+    Deleted,
+    Renamed { from: url::Url },
+}
+