From 58d3431bf50f581d97bf8667e73ada64226ff45f Mon Sep 17 00:00:00 2001
From: fre$h <anonwurcod@proton.me>
Date: Fri, 13 Feb 2026 15:30:26 -0500
Subject: [PATCH] fix: ignore deprecated skills extension (#7139)

Signed-off-by: anonwurcod <anonwurcod@proton.me>
Co-authored-by: Warp <agent@warp.dev>
---
 crates/goose/src/config/extensions.rs      | 60 +++++++++++++++++++---
 crates/goose/src/session/extension_data.rs | 40 +++++++++++++++
 2 files changed, 92 insertions(+), 8 deletions(-)

diff --git a/crates/goose/src/config/extensions.rs b/crates/goose/src/config/extensions.rs
index bd872fd394..2f51c412c8 100644
--- a/crates/goose/src/config/extensions.rs
+++ b/crates/goose/src/config/extensions.rs
@@ -1,4 +1,5 @@
 use super::base::Config;
+use crate::agents::extension::PLATFORM_EXTENSIONS;
 use crate::agents::ExtensionConfig;
 use indexmap::IndexMap;
 use serde::{Deserialize, Serialize};
@@ -31,6 +32,15 @@ pub fn name_to_key(name: &str) -> String {
     result.to_lowercase()
 }
 
+pub(crate) fn is_extension_available(config: &ExtensionConfig) -> bool {
+    match config {
+        ExtensionConfig::Platform { name, .. } => {
+            PLATFORM_EXTENSIONS.contains_key(name_to_key(name).as_str())
+        }
+        _ => true,
+    }
+}
+
 fn get_extensions_map_with_config(config: &Config) -> IndexMap<String, ExtensionEntry> {
     let raw: Mapping = config
         .get_param(EXTENSIONS_CONFIG_KEY)
@@ -46,6 +56,9 @@ fn get_extensions_map_with_config(config: &Config) -> IndexMap<String, Extension
     for (k, v) in raw {
         match (k, serde_yaml::from_value::<ExtensionEntry>(v)) {
             (serde_yaml::Value::String(key), Ok(entry)) => {
+                if !is_extension_available(&entry.config) {
+                    continue;
+                }
                 extensions_map.insert(key, entry);
             }
             (k, v) => {
@@ -158,13 +171,44 @@ pub fn resolve_extensions_for_new_session(
     recipe_extensions: Option<&[ExtensionConfig]>,
     override_extensions: Option<Vec<ExtensionConfig>>,
 ) -> Vec<ExtensionConfig> {
-    if let Some(exts) = recipe_extensions {
-        return exts.to_vec();
-    }
+    let extensions = if let Some(exts) = recipe_extensions {
+        exts.to_vec()
+    } else if let Some(exts) = override_extensions {
+        exts
+    } else {
+        get_enabled_extensions()
+    };
 
-    if let Some(exts) = override_extensions {
-        return exts;
-    }
-
-    get_enabled_extensions()
+    extensions
+        .into_iter()
+        .filter(is_extension_available)
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_is_extension_available_filters_unknown_platform() {
+        let unknown_platform = ExtensionConfig::Platform {
+            name: "definitely_not_real_platform_extension".to_string(),
+            description: "unknown".to_string(),
+            display_name: None,
+            bundled: None,
+            available_tools: Vec::new(),
+        };
+
+        let builtin = ExtensionConfig::Builtin {
+            name: "developer".to_string(),
+            description: "".to_string(),
+            display_name: Some("Developer".to_string()),
+            timeout: None,
+            bundled: None,
+            available_tools: Vec::new(),
+        };
+
+        assert!(!is_extension_available(&unknown_platform));
+        assert!(is_extension_available(&builtin));
+    }
 }
diff --git a/crates/goose/src/session/extension_data.rs b/crates/goose/src/session/extension_data.rs
index 243004c3c7..b286a3e220 100644
--- a/crates/goose/src/session/extension_data.rs
+++ b/crates/goose/src/session/extension_data.rs
@@ -2,6 +2,7 @@
 // Provides a simple way to store extension-specific data with versioned keys
 
 use crate::config::base::Config;
+use crate::config::extensions::is_extension_available;
 use crate::config::ExtensionConfig;
 use crate::session::SessionManager;
 use anyhow::Result;
@@ -114,6 +115,12 @@ impl EnabledExtensionsState {
         Self { extensions }
     }
 
+    pub fn from_extension_data(extension_data: &ExtensionData) -> Option<Self> {
+        let mut state = <Self as ExtensionState>::from_extension_data(extension_data)?;
+        state.extensions.retain(is_extension_available);
+        Some(state)
+    }
+
     pub fn extensions_or_default(
         extension_data: Option<&ExtensionData>,
         config: &Config,
@@ -259,4 +266,37 @@ mod tests {
             Some(&json!({"key": "value"}))
         );
     }
+
+    #[test]
+    fn test_enabled_extensions_state_filters_unavailable_platform() {
+        let mut extension_data = ExtensionData::new();
+        let state = EnabledExtensionsState::new(vec![
+            ExtensionConfig::Platform {
+                name: "definitely_not_real_platform_extension".to_string(),
+                description: "unknown".to_string(),
+                display_name: None,
+                bundled: None,
+                available_tools: Vec::new(),
+            },
+            ExtensionConfig::Builtin {
+                name: "developer".to_string(),
+                description: "".to_string(),
+                display_name: Some("Developer".to_string()),
+                timeout: None,
+                bundled: None,
+                available_tools: Vec::new(),
+            },
+        ]);
+
+        state.to_extension_data(&mut extension_data).unwrap();
+
+        let loaded =
+            EnabledExtensionsState::from_extension_data(&extension_data).expect("state present");
+        let names: Vec<String> = loaded.extensions.iter().map(|ext| ext.name()).collect();
+
+        assert!(names.iter().any(|name| name == "developer"));
+        assert!(!names
+            .iter()
+            .any(|name| name == "definitely_not_real_platform_extension"));
+    }
 }