Configurable search paths (#5356)

crates/goose/src/agents/extension_manager.rs

@@ -32,6 +32,7 @@ use super::tool_execution::ToolCallResult;
 use crate::agents::extension::{Envs, ProcessExit};
 use crate::agents::extension_malware_check;
 use crate::agents::mcp_client::{McpClient, McpClientTrait};
+use crate::config::search_path::search_path_var;
 use crate::config::{get_all_extensions, Config};
 use crate::oauth::oauth_flow;
 use crate::prompt_template;
@@ -182,6 +183,12 @@ async fn child_process_client(
     command.process_group(0);
     #[cfg(windows)]
     command.creation_flags(CREATE_NO_WINDOW_FLAG);
+
+    command.env(
+        "PATH",
+        search_path_var().map_err(|e| ExtensionError::ConfigError(format!("{}", e)))?,
+    );
+
     let (transport, mut stderr) = TokioChildProcess::builder(command)
         .stderr(Stdio::piped())
         .spawn()?;