{
  "context": "Evaluates whether the solution builds the spec's error module by leaning on @backstage/errors for cause-aware error handling. Checks focus on inheriting the package's base class and using its helpers to preserve causes, messages, and names when wrapping unknown failures.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Base inheritance",
      "description": "PipelineError extends @backstage/errors CustomErrorBase instead of the built-in Error, so cause-aware messaging and captured stacks come from the package.",
      "max_score": 30
    },
    {
      "name": "Cause retention",
      "description": "Constructor forwards the optional cause through CustomErrorBase so Error inputs surface as the instance's cause while non-Error values are dropped per isError checks.",
      "max_score": 20
    },
    {
      "name": "Message chaining",
      "description": "Messages rely on CustomErrorBase/stringifyError behavior to append the cause text to the primary message rather than reimplementing concatenation logic.",
      "max_score": 15
    },
    {
      "name": "Subclass naming",
      "description": "InvalidConfigError and TaskFailedError depend on CustomErrorBase to auto-assign the subclass name (no manual name strings or overrides).",
      "max_score": 15
    },
    {
      "name": "Guard helpers",
      "description": "ensureError uses assertError or isError from @backstage/errors to accept existing Error instances and wrap unknown values with a fallback message instead of ad-hoc type guards.",
      "max_score": 20
    }
  ]
}