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server/rust_coder_environment.py

@@ -160,7 +160,10 @@ class RustCoderEnvironment(Environment):
         if not code.strip():
             # Some UIs may "step" without providing an action payload.
             # Optionally auto-generate code via LLM so the UI can still progress.
-            auto_llm = (os.getenv("AUTO_LLM_ON_EMPTY_STEP") or "0").strip().lower() in {"1", "true", "yes", "y"}
+            # Default ON (because the hosted UI "Step" provides no code).
+            # To disable: set AUTO_LLM_ON_EMPTY_STEP=0/false/no.
+            auto_llm_cfg = (os.getenv("AUTO_LLM_ON_EMPTY_STEP") or "1").strip().lower()
+            auto_llm = auto_llm_cfg not in {"0", "false", "no", "n", "off"}
             if auto_llm:
                 model = os.getenv("MODEL_NAME") or "Qwen/Qwen2.5-72B-Instruct"
                 base_url = os.getenv("API_BASE_URL") or "https://router.huggingface.co/v1"
@@ -176,6 +179,13 @@ class RustCoderEnvironment(Environment):
                     "AUTO_LLM_ON_EMPTY_STEP enabled; attempting LLM generation",
                     {"model": model, "base_url": base_url, "prompt_chars": len(prompt), "token_present": bool(token)},
                 )
+                self._logger.info(
+                    "Auto-LLM on empty step: model=%s base_url=%s prompt_chars=%d token_present=%s",
+                    model,
+                    base_url,
+                    len(prompt),
+                    bool(token),
+                )
 
                 if not token:
                     self._logger.error("AUTO_LLM_ON_EMPTY_STEP enabled but HF_TOKEN/API_KEY missing.")
@@ -219,6 +229,7 @@ class RustCoderEnvironment(Environment):
                             "LLM produced non-empty code; continuing evaluation",
                             {"code_chars": len(code)},
                         )
+                        self._logger.info("Auto-LLM generated code chars=%d", len(code))
                     else:
                         self._dbg(
                             "H5",
@@ -226,6 +237,7 @@ class RustCoderEnvironment(Environment):
                             "LLM returned empty after cleanup; falling back to empty submission behavior",
                             {"raw_chars": len((completion.choices[0].message.content or ""))},
                         )
+                        self._logger.warning("Auto-LLM returned empty after cleanup.")
                 except Exception as e:
                     self._dbg(
                         "H5",
@@ -233,6 +245,7 @@ class RustCoderEnvironment(Environment):
                         "LLM call failed; falling back to empty submission behavior",
                         {"error": str(e)},
                     )
+                    self._logger.exception("Auto-LLM call failed.")
 
             if not code.strip():
                 # Invalid/empty submission: do not advance the problem index.