Remove dependency on goose-mcp from goose crate

crates/goose-acp/Cargo.toml

@@ -16,6 +16,7 @@ workspace = true
 
 [dependencies]
 goose = { path = "../goose" }
+goose-mcp = { path = "../goose-mcp" }
 rmcp = { workspace = true }
 sacp = "10.1.0"
 anyhow = { workspace = true }

crates/goose-acp/src/server.rs

@@ -2,6 +2,7 @@ use anyhow::Result;
 use fs_err as fs;
 use goose::agents::extension::{Envs, PLATFORM_EXTENSIONS};
 use goose::agents::{Agent, AgentConfig, ExtensionConfig, SessionConfig};
+use goose::builtin_extension::register_builtin_extensions;
 use goose::config::base::CONFIG_YAML_NAME;
 use goose::config::extensions::get_enabled_extensions_with_config;
 use goose::config::paths::Paths;
@@ -1035,6 +1036,7 @@ where
 }
 
 pub async fn run(builtins: Vec<String>) -> Result<()> {
+    register_builtin_extensions(goose_mcp::BUILTIN_EXTENSIONS.clone());
     info!("listening on stdio");
 
     let outgoing = tokio::io::stdout().compat_write();

crates/goose-acp/tests/fixtures/mod.rs

@@ -1,6 +1,7 @@
 use assert_json_diff::{assert_json_matches_no_panic, CompareMode, Config};
 use async_trait::async_trait;
 use fs_err as fs;
+use goose::builtin_extension::register_builtin_extensions;
 use goose::config::{GooseMode, PermissionManager};
 use goose::model::ModelConfig;
 use goose::providers::api_client::{ApiClient, AuthMethod};
@@ -445,6 +446,8 @@ pub fn run_test<F>(fut: F)
 where
     F: Future<Output = ()> + Send + 'static,
 {
+    register_builtin_extensions(goose_mcp::BUILTIN_EXTENSIONS.clone());
+
     let handle = std::thread::Builder::new()
         .name("acp-test".to_string())
         .stack_size(8 * 1024 * 1024)

crates/goose-cli/src/cli.rs

@@ -1,6 +1,7 @@
 use anyhow::Result;
 use clap::{Args, CommandFactory, Parser, Subcommand};
 use clap_complete::{generate, Shell as ClapShell};
+use goose::builtin_extension::register_builtin_extensions;
 use goose::config::Config;
 use goose::posthog::get_telemetry_choice;
 use goose::recipe::Recipe;
@@ -1513,6 +1514,8 @@ async fn handle_default_session() -> Result<()> {
 }
 
 pub async fn cli() -> anyhow::Result<()> {
+    register_builtin_extensions(goose_mcp::BUILTIN_EXTENSIONS.clone());
+
     let cli = Cli::parse();
 
     if let Err(e) = crate::project_tracker::update_project_tracker(None, None) {

crates/goose-cli/src/scenario_tests/scenario_runner.rs

@@ -204,7 +204,7 @@ where
     let temp_dir = TempDir::new()?;
     let session_manager = Arc::new(SessionManager::new(temp_dir.path().to_path_buf()));
     let permission_manager = Arc::new(PermissionManager::new(temp_dir.path().to_path_buf()));
-    let agent_config = AgentConfig::new(session_manager, permission_manager, None, GooseMode::Auto); // no scheduler needed for scenario tests
+    let agent_config = AgentConfig::new(session_manager, permission_manager, None, GooseMode::Auto);
     let agent = Agent::with_config(agent_config);
     agent
         .extension_manager

crates/goose-mcp/src/lib.rs

@@ -22,13 +22,9 @@ pub use developer::rmcp_developer::DeveloperServer;
 pub use memory::MemoryServer;
 pub use tutorial::TutorialServer;
 
+/// Type definition for a function that spawns and serves a builtin extension server
 pub type SpawnServerFn = fn(tokio::io::DuplexStream, tokio::io::DuplexStream);
 
-pub struct BuiltinDef {
-    pub name: &'static str,
-    pub spawn_server: SpawnServerFn,
-}
-
 fn spawn_and_serve<S>(
     name: &'static str,
     server: S,
@@ -51,17 +47,11 @@ macro_rules! builtin {
         fn spawn(r: tokio::io::DuplexStream, w: tokio::io::DuplexStream) {
             spawn_and_serve(stringify!($name), <$server_ty>::new(), (r, w));
         }
-        (
-            stringify!($name),
-            BuiltinDef {
-                name: stringify!($name),
-                spawn_server: spawn,
-            },
-        )
+        (stringify!($name), spawn as SpawnServerFn)
     }};
 }
 
-pub static BUILTIN_EXTENSIONS: Lazy<HashMap<&'static str, BuiltinDef>> = Lazy::new(|| {
+pub static BUILTIN_EXTENSIONS: Lazy<HashMap<&'static str, SpawnServerFn>> = Lazy::new(|| {
     HashMap::from([
         builtin!(developer, DeveloperServer),
         builtin!(autovisualiser, AutoVisualiserRouter),

crates/goose-server/src/state.rs

@@ -1,4 +1,5 @@
 use axum::http::StatusCode;
+use goose::builtin_extension::register_builtin_extensions;
 use goose::execution::manager::AgentManager;
 use goose::scheduler_trait::SchedulerTrait;
 use goose::session::SessionManager;
@@ -26,6 +27,8 @@ pub struct AppState {
 
 impl AppState {
     pub async fn new() -> anyhow::Result<Arc<AppState>> {
+        register_builtin_extensions(goose_mcp::BUILTIN_EXTENSIONS.clone());
+
         let agent_manager = AgentManager::instance().await?;
         let tunnel_manager = Arc::new(TunnelManager::new());
 

crates/goose/Cargo.toml

@@ -87,7 +87,6 @@ dashmap = "6.1"
 ahash = "0.8"
 tokio-util = { version = "0.7.15", features = ["compat"] }
 unicode-normalization = "0.1"
-goose-mcp = { path = "../goose-mcp" }
 zip = "0.6"
 sys-info = "0.9"
 

crates/goose/src/agents/extension_manager.rs

@@ -35,6 +35,7 @@ use super::types::SharedProvider;
 use crate::agents::extension::{Envs, ProcessExit};
 use crate::agents::extension_malware_check;
 use crate::agents::mcp_client::{McpClient, McpClientTrait};
+use crate::builtin_extension::get_builtin_extension;
 use crate::config::extensions::name_to_key;
 use crate::config::search_path::SearchPaths;
 use crate::config::{get_all_extensions, Config};
@@ -564,14 +565,9 @@ impl ExtensionManager {
             }
             ExtensionConfig::Builtin { name, timeout, .. } => {
                 let timeout_duration = Duration::from_secs(timeout.unwrap_or(300));
-                let normalized_name = name_to_key(name);
-
-                if !goose_mcp::BUILTIN_EXTENSIONS.contains_key(normalized_name.as_str()) {
-                    return Err(ExtensionError::ConfigError(format!(
-                        "Unknown builtin extension: {}",
-                        name
-                    )));
-                }
+                let extension_fn = get_builtin_extension(name.as_str()).ok_or_else(|| {
+                    ExtensionError::ConfigError(format!("Unknown builtin extension: {}", name))
+                })?;
 
                 if let Some(container) = container {
                     let container_id = container.id();
@@ -580,6 +576,7 @@ impl ExtensionManager {
                         builtin = %name,
                         "Starting builtin extension inside Docker container"
                     );
+                    let normalized_name = name_to_key(name);
                     let command = Command::new("docker").configure(|command| {
                         command
                             .arg("exec")
@@ -600,10 +597,6 @@ impl ExtensionManager {
                     .await?;
                     Box::new(client)
                 } else {
-                    let def = goose_mcp::BUILTIN_EXTENSIONS
-                        .get(normalized_name.as_str())
-                        .unwrap();
-
                     // Set GOOSE_WORKING_DIR in the current process for builtin extensions
                     // since they run in-process and read from std::env::var
                     if effective_working_dir.exists() && effective_working_dir.is_dir() {
@@ -616,7 +609,7 @@ impl ExtensionManager {
 
                     let (server_read, client_write) = tokio::io::duplex(65536);
                     let (client_read, server_write) = tokio::io::duplex(65536);
-                    (def.spawn_server)(server_read, server_write);
+                    extension_fn(server_read, server_write);
                     Box::new(
                         McpClient::connect(
                             (client_read, client_write),

crates/goose/src/builtin_extension.rs

@@ -0,0 +1,24 @@
+use once_cell::sync::Lazy;
+use std::collections::HashMap;
+use std::sync::RwLock;
+
+pub type SpawnServerFn = fn(tokio::io::DuplexStream, tokio::io::DuplexStream);
+
+static BUILTIN_REGISTRY: Lazy<RwLock<HashMap<&'static str, SpawnServerFn>>> =
+    Lazy::new(|| RwLock::new(HashMap::new()));
+
+/// Register a builtin extension into the global registry
+pub fn register_builtin_extension(name: &'static str, spawn_fn: SpawnServerFn) {
+    BUILTIN_REGISTRY.write().unwrap().insert(name, spawn_fn);
+}
+
+/// Register multiple builtin extensions from a HashMap
+pub fn register_builtin_extensions(extensions: HashMap<&'static str, SpawnServerFn>) {
+    let mut registry = BUILTIN_REGISTRY.write().unwrap();
+    registry.extend(extensions);
+}
+
+/// Get a copy of all registered builtin extensions
+pub fn get_builtin_extension(name: &str) -> Option<SpawnServerFn> {
+    BUILTIN_REGISTRY.read().unwrap().get(name).cloned()
+}

crates/goose/src/lib.rs

@@ -1,5 +1,6 @@
 pub mod action_required_manager;
 pub mod agents;
+pub mod builtin_extension;
 pub mod config;
 pub mod context_mgmt;
 pub mod conversation;