Review comments

crates/goose-cli/src/commands/session.rs

@@ -16,7 +16,7 @@ pub async fn build_session(
     name: Option<String>,
     resume: bool,
     extensions: Vec<String>,
-    builtin: Vec<String>,
+    builtins: Vec<String>,
 ) -> Session<'static> {
     // Load config and get provider/model
     let config = Config::global();
@@ -105,7 +105,7 @@ pub async fn build_session(
     }
 
     // Add builtin extensions
-    for name in builtin {
+    for name in builtins {
         let config = ExtensionConfig::Builtin { name };
         agent.add_extension(config).await.unwrap_or_else(|e| {
             eprintln!("Failed to start builtin extension: {}", e);

documentation/docs/getting-started/using-extensions.md

@@ -251,7 +251,7 @@ You can remove installed extensions.
 You can start a tailored goose session with specific extensions directly from the CLI. To do this, run the following command:
 
 ```bash
-goose session --with-extension "{extension command}"
+goose session --with-extension "{extension command}" --with-extension "{antoher extension command}"
 ```
 
 :::info
@@ -261,6 +261,14 @@ goose session --with-extension "VAR=value command arg1 arg2"
 ```
 :::
 
+:::tip
+You can also start a session with built-in extensions by using the `--with-builtin` flag.
+```bash
+goose session --with-builtin "developer,memory"
+goose session --with-builtin developer --with-builtin memory
+```
+:::
+
 ## Developing Extensions
 Goose extensions are implemented with MCP, a standard protocol that allows AI models and agents to securely connect with local or remote resources. Learn how to build your own [extension as an MCP server](https://modelcontextprotocol.io/quickstart/server).