rohitg00/ai-engineering-from-scratch · error · ValueError

plateau_window must be >= 1

Error message

plateau_window must be >= 1

What it means

Error "plateau_window must be >= 1" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at phases/19-capstone-projects/55-critic-loop/code/main.py:146

        }


class CriticLoop:
    """Drives critic -> reviser -> convergence-check until a stop condition fires."""

    def __init__(
        self,
        critic: Critic,
        reviser: Reviser,
        max_rounds: int = 5,
        target_score: float = 8.0,
        plateau_epsilon: float = 0.1,
        plateau_window: int = 2,
    ) -> None:
        if max_rounds < 1:
            raise ValueError("max_rounds must be >= 1")
        if plateau_window < 1:
            raise ValueError("plateau_window must be >= 1")
        self.critic = critic
        self.reviser = reviser
        self.max_rounds = max_rounds
        self.target_score = target_score
        self.plateau_epsilon = plateau_epsilon
        self.plateau_window = plateau_window

    def _target_met(self, critique: Critique) -> bool:
        return all(critique.scores.get(d, 0.0) >= self.target_score for d in DIMENSIONS)

    def _plateau(self, trace: list[LoopTrace]) -> bool:
        if len(trace) < self.plateau_window + 1:
            return False
        recent = trace[-(self.plateau_window + 1):]
        for i in range(1, len(recent)):
            if recent[i].mean - recent[i - 1].mean > self.plateau_epsilon:
                return False
        return True

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at phases/19-capstone-projects/55-critic-loop/code/main.py:146 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rohitg00/ai-engineering-from-scratch@39ea8a1c6d (2026-08-26). Data as JSON: /api/errors/a7f6c97a66169af7. Report an issue: GitHub.