Initial Agentsd project commit

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

core/agentsd/src/main.rs

@@ -0,0 +1,22 @@
+mod syscall;
+mod plugin;
+mod server;
+pub mod paths;
+pub mod callback;
+pub mod permission;
+
+use anyhow::Result;
+use tracing_subscriber::EnvFilter;
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(EnvFilter::from_default_env().add_directive("agentsd=info".parse()?))
+        .init();
+
+    tracing::info!("agentsd starting");
+    tracing::info!("data dir: {}", paths::data_dir().display());
+
+    let kernel = syscall::Kernel::new()?;
+    server::run(kernel).await
+}