feat: make pctx/Code Mode an optional dependency via 'code-mode' feature (#7567)

crates/goose/Cargo.toml

@@ -8,7 +8,8 @@ repository.workspace = true
 description.workspace = true
 
 [features]
-default = []
+default = ["code-mode"]
+code-mode = ["dep:pctx_code_mode"]
 cuda = ["candle-core/cuda", "candle-nn/cuda", "llama-cpp-2/cuda"]
 
 [lints]
@@ -123,7 +124,7 @@ shellexpand = { workspace = true }
 indexmap = "2.12.0"
 ignore = { workspace = true }
 which = { workspace = true }
-pctx_code_mode = "^0.2.3"
+pctx_code_mode = { version = "^0.2.3", optional = true }
 unbinder = "0.1.7"
 pulldown-cmark = "0.13.0"
 llama-cpp-2 = { git = "https://github.com/jh-block/llama-cpp-rs.git", branch = "goose-patches", features = ["sampler"] }

crates/goose/src/agents/platform_extensions/mod.rs

@@ -1,5 +1,6 @@
 pub mod apps;
 pub mod chatrecall;
+#[cfg(feature = "code-mode")]
 pub mod code_execution;
 pub mod developer;
 pub mod ext_manager;
@@ -88,6 +89,7 @@ pub static PLATFORM_EXTENSIONS: Lazy<HashMap<&'static str, PlatformExtensionDef>
             },
         );
 
+        #[cfg(feature = "code-mode")]
         map.insert(
             code_execution::EXTENSION_NAME,
             PlatformExtensionDef {

crates/goose/src/agents/reply_parts.rs

@@ -8,6 +8,7 @@ use serde_json::{json, Value};
 use tracing::debug;
 
 use super::super::agents::Agent;
+#[cfg(feature = "code-mode")]
 use crate::agents::platform_extensions::code_execution;
 use crate::conversation::message::{Message, MessageContent, ToolRequest};
 use crate::conversation::Conversation;
@@ -146,10 +147,13 @@ impl Agent {
             tools.push(frontend_tool.tool.clone());
         }
 
+        #[cfg(feature = "code-mode")]
         let code_execution_active = self
             .extension_manager
             .is_extension_enabled(code_execution::EXTENSION_NAME)
             .await;
+        #[cfg(not(feature = "code-mode"))]
+        let code_execution_active = false;
         if code_execution_active {
             tools.retain(|tool| {
                 if let Some(owner) = crate::agents::extension_manager::get_tool_owner(tool) {