feat(runtime): implement JSON repair function for truncated tool-call arguments

src/model/app_config.rs

@@ -182,3 +182,24 @@ fn claude_credentials_from_env() -> Option<(String, String)> {
     let key = std::env::var("ANTHROPIC_API_KEY").ok()?;
     Some((base_url, key))
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn claude_credentials_from_env_resolves_real_env_vars() {
+        // In the test runner's environment ANTHROPIC_BASE_URL and
+        // ANTHROPIC_API_KEY may or may not be set — we only verify that
+        // the function returns Some(..) when both are present.
+        let (b, k) = match claude_credentials_from_env() {
+            Some(v) => v,
+            None => {
+                // Not an error: CI / local without the vars.
+                return;
+            }
+        };
+        assert!(!b.is_empty(), "ANTHROPIC_BASE_URL must not be empty");
+        assert!(!k.is_empty(), "ANTHROPIC_API_KEY must not be empty");
+    }
+}