fix: ensure language_version is detected before optimization API calls

KRRT7 · KRRT7 · commit 70260f22b351 · 2026-04-10T07:39:49.000-05:00
JavaSupport.ensure_runtime_environment() was never called during the
optimization flow, so _language_version stayed None and the backend
received language_version=null. The LLM had no Java version constraint,
causing it to generate Java 16+ APIs (e.g. Stream.toList()) for Java 11
projects.
diff --git a/codeflash/languages/function_optimizer.py b/codeflash/languages/function_optimizer.py
@@ -489,6 +489,7 @@ def __init__(
             else function_to_optimize.file_path.read_text(encoding="utf8")
         )
         self.language_support = current_language_support()
+        self.language_support.ensure_runtime_environment(self.project_root)
         if not function_to_optimize_ast:
             self.function_to_optimize_ast = self._resolve_function_ast(
                 self.function_to_optimize_source_code, function_to_optimize.function_name, function_to_optimize.parents

Original file line number	Diff line number	Diff line change
`@@ -489,6 +489,7 @@ def __init__(`
`489`	`489`	`else function_to_optimize.file_path.read_text(encoding="utf8")`
`490`	`490`	`)`
`491`	`491`	`self.language_support = current_language_support()`
	`492`	`+ self.language_support.ensure_runtime_environment(self.project_root)`
`492`	`493`	`if not function_to_optimize_ast:`
`493`	`494`	`self.function_to_optimize_ast = self._resolve_function_ast(`
`494`	`495`	`self.function_to_optimize_source_code, function_to_optimize.function_name, function_to_optimize.parents`