diff --git a/crates/openfang-runtime/src/drivers/anthropic.rs b/crates/openfang-runtime/src/drivers/anthropic.rs
index fdbe99b5..344b4d46 100644
--- a/crates/openfang-runtime/src/drivers/anthropic.rs
+++ b/crates/openfang-runtime/src/drivers/anthropic.rs
@@ -472,7 +472,8 @@ impl LlmDriver for AnthropicDriver {
                             }) = blocks.get(block_idx)
                             {
                                 let input: serde_json::Value =
-                                    serde_json::from_str(input_json).unwrap_or_default();
+                                    serde_json::from_str(input_json)
+                                        .unwrap_or_else(|_| serde_json::json!({}));
                                 let _ = tx
                                     .send(StreamEvent::ToolUseEnd {
                                         id: id.clone(),
diff --git a/crates/openfang-runtime/src/drivers/openai.rs b/crates/openfang-runtime/src/drivers/openai.rs
index 54f55181..7d54c432 100644
--- a/crates/openfang-runtime/src/drivers/openai.rs
+++ b/crates/openfang-runtime/src/drivers/openai.rs
@@ -153,9 +153,14 @@ fn rejects_temperature(model: &str) -> bool {
     m.starts_with("o1")
         || m.starts_with("o3")
         || m.starts_with("o4")
-        // GPT-5-mini is a reasoning model that rejects temperature
+        // GPT-5 nano/mini are reasoning models that reject temperature
         || m.starts_with("gpt-5-mini")
+        || m.starts_with("gpt-5-nano")
         || m.starts_with("gpt5-mini")
+        || m.starts_with("gpt5-nano")
+        // DeepSeek-R1 reasoning models
+        || m.contains("deepseek-r1")
+        || m.contains("reasoner")
         // Catch any model explicitly tagged as "reasoning"
         || m.contains("-reasoning")
 }
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 00000000..758d4179
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1 @@
+max_width = 100