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

transport has no scripted response left

Error message

transport has no scripted response left

What it means

Error "transport has no scripted response left" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at certifications/claude/lessons/08-messages-api-and-application-lifecycle/code/main.py:67

        delivery = "message-batch"
    elif needs.progressive_output:
        delivery = "streaming"
    else:
        delivery = "synchronous"
    return {"client": client, "delivery": delivery}


class ScriptedTransport:
    """A stateless transport that returns scripted API responses."""

    def __init__(self, responses: list[dict[str, Any]]) -> None:
        self._responses = copy.deepcopy(responses)
        self.requests: list[list[dict[str, Any]]] = []

    def create(self, messages: list[dict[str, Any]]) -> dict[str, Any]:
        self.requests.append(copy.deepcopy(messages))
        if not self._responses:
            raise ProtocolError("transport has no scripted response left")
        return self._responses.pop(0)


class MessageLifecycle:
    """Own conversation state and advance it until the model ends the turn."""

    def __init__(
        self,
        transport: ScriptedTransport,
        tools: dict[str, Callable[[dict[str, Any]], Any]] | None = None,
        max_turns: int = 8,
    ) -> None:
        if max_turns < 1:
            raise ValueError("max_turns must be positive")
        self.transport = transport
        self.tools = tools or {}
        self.max_turns = max_turns

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at certifications/claude/lessons/08-messages-api-and-application-lifecycle/code/main.py:67 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/a7a0e2da20f36c46. Report an issue: GitHub.