{"record":{"id":"8044695ff6dda638","repo":"rohitg00/ai-engineering-from-scratch","slug":"could-not-build-spec-for-sibling","errorCode":null,"errorMessage":"could not build spec for {sibling}","messagePattern":"could not build spec for (.+?)","errorType":"exception","errorClass":"ImportError","httpStatus":null,"severity":"error","filePath":"phases/19-capstone-projects/75-end-to-end-eval-runner/code/main.py","lineNumber":31,"sourceCode":"import json\nimport os\nimport random\nimport sys\nimport time\nfrom concurrent.futures import ThreadPoolExecutor, as_completed\nfrom dataclasses import dataclass, field\nfrom typing import Callable, Sequence\n\n\ndef _load_sibling(lesson_dir: str, module_name: str = \"main\"):\n    here = os.path.dirname(os.path.abspath(__file__))\n    sibling = os.path.normpath(os.path.join(here, \"..\", \"..\", lesson_dir, \"code\", \"main.py\"))\n    if not os.path.isfile(sibling):\n        raise ImportError(f\"sibling module not found: {sibling}\")\n    mod_name = f\"_sibling_{lesson_dir.replace('-', '_')}\"\n    spec = importlib.util.spec_from_file_location(mod_name, sibling)\n    if spec is None or spec.loader is None:\n        raise ImportError(f\"could not build spec for {sibling}\")\n    module = importlib.util.module_from_spec(spec)\n    sys.modules[mod_name] = module\n    spec.loader.exec_module(module)\n    return module\n\n\nspec_mod = _load_sibling(\"70-task-spec-format\")\nmetrics_mod = _load_sibling(\"71-classical-metrics\")\nexec_mod = _load_sibling(\"72-code-exec-metric\")\ncalib_mod = _load_sibling(\"73-perplexity-calibration\")\nboard_mod = _load_sibling(\"74-leaderboard-aggregation\")\n\n\nTaskSpec = spec_mod.TaskSpec\n\n\n@dataclass\nclass Generation:","sourceCodeStart":13,"sourceCodeEnd":49,"githubUrl":"https://github.com/rohitg00/ai-engineering-from-scratch/blob/39ea8a1c6d0b61f071226eff7ede4d4105fed820/phases/19-capstone-projects/75-end-to-end-eval-runner/code/main.py#L13-L49","documentation":"Error \"could not build spec for {sibling}\" thrown in rohitg00/ai-engineering-from-scratch.","triggerScenarios":"Thrown at phases/19-capstone-projects/75-end-to-end-eval-runner/code/main.py:31 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"39ea8a1c6d0b61f071226eff7ede4d4105fed820","analyzedAt":"2026-08-26T03:13:46.626Z","schemaVersion":2},"datasetVersion":"2026-08-26T07:17:17.940Z"}