Onboarding detect provider from api key (#5955)

Co-authored-by: spencrmartin <spencermartin@squareup.com>
Co-authored-by: Michael Neale <michael.neale@gmail.com>

crates/goose/src/providers/auto_detect.rs

@@ -0,0 +1,51 @@
+use crate::model::ModelConfig;
+
+pub async fn detect_provider_from_api_key(api_key: &str) -> Option<(String, Vec<String>)> {
+    let provider_tests = vec![
+        ("anthropic", "ANTHROPIC_API_KEY"),
+        ("openai", "OPENAI_API_KEY"),
+        ("google", "GOOGLE_API_KEY"),
+        ("groq", "GROQ_API_KEY"),
+        ("xai", "XAI_API_KEY"),
+        // Ollama and OpenRouter don't validate keys, so they would match any input
+    ];
+
+    let tasks: Vec<_> = provider_tests
+        .into_iter()
+        .map(|(provider_name, env_key)| {
+            let api_key = api_key.to_string();
+            tokio::spawn(async move {
+                let original_value = std::env::var(env_key).ok();
+                std::env::set_var(env_key, &api_key);
+
+                let result = match crate::providers::create(
+                    provider_name,
+                    ModelConfig::new_or_fail("default"),
+                )
+                .await
+                {
+                    Ok(provider) => match provider.fetch_supported_models().await {
+                        Ok(Some(models)) => Some((provider_name.to_string(), models)),
+                        _ => None,
+                    },
+                    Err(_) => None,
+                };
+
+                match original_value {
+                    Some(val) => std::env::set_var(env_key, val),
+                    None => std::env::remove_var(env_key),
+                }
+
+                result
+            })
+        })
+        .collect();
+
+    for task in tasks {
+        if let Ok(Some(result)) = task.await {
+            return Some(result);
+        }
+    }
+
+    None
+}

crates/goose/src/providers/mod.rs

@@ -1,5 +1,6 @@
 pub mod anthropic;
 pub mod api_client;
+pub mod auto_detect;
 pub mod azure;
 pub mod azureauth;
 pub mod base;