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SmeltCheckTool — MCP entry point for smelt check.

SmeltCheckTool

Bases: AXMTool

Analyze text/data for token waste without transforming it.

Input is resolved in order: caller-provided data, input_path, then non-interactive standard input.

Registered as smelt_check via axm.tools entry point.

Source code in packages/axm-smelt/src/axm_smelt/tools/check.py
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class SmeltCheckTool(AXMTool):
    """Analyze text/data for token waste without transforming it.

    Input is resolved in order: caller-provided data, ``input_path``, then
    non-interactive standard input.

    Registered as ``smelt_check`` via axm.tools entry point.
    """

    agent_hint: str = (
        "Analyze text or JSON data for token waste — returns detected format, "
        "token count, and per-strategy saving estimates without modifying input"
    )

    @property
    def name(self) -> str:
        """Return tool name for registry lookup."""
        return "smelt_check"

    def execute(
        self,
        *,
        data: JsonValue = "",
        input_path: str | None = None,
        **kwargs: object,
    ) -> ToolResult:
        """Analyze data for token reduction opportunities.

        Args:
            data: Text or JSON data to analyze.
            input_path: Optional UTF-8 input file used when data is empty.

        Returns:
            ToolResult with format, token count, and strategy estimates.
        """
        try:
            if data is None:
                msg = "data must not be None"
                raise ValueError(msg)

            if isinstance(data, str):
                data = resolve_text_source(data, input_path, stdin=sys.stdin)

            from axm_smelt.core.pipeline import check

            if not isinstance(data, str):
                report = check(
                    parsed=cast("dict[str, JsonValue] | list[JsonValue]", data)
                )
            else:
                report = check(data)

            ranked = sorted(
                report.strategy_estimates.items(),
                key=lambda kv: kv[1],
                reverse=True,
            )
            header = (
                f"smelt_check | {report.format.value} | {report.original_tokens} tok"
            )
            if ranked:
                body = "\n".join(f"  {name}: -{pct}%" for name, pct in ranked)
                text = f"{header}\n{body}"
            else:
                text = f"{header}\n  no waste detected"
            return ToolResult(
                success=True,
                data={
                    "format": report.format.value,
                    "tokens": report.original_tokens,
                    "strategy_estimates": report.strategy_estimates,
                },
                text=text,
            )
        except Exception as exc:  # noqa: BLE001
            return ToolResult(success=False, error=str(exc))
name property

Return tool name for registry lookup.

execute(*, data='', input_path=None, **kwargs)

Analyze data for token reduction opportunities.

Parameters:

Name Type Description Default
data JsonValue

Text or JSON data to analyze.

 ''
input_path str | None

Optional UTF-8 input file used when data is empty.

 None

Returns:

Type Description
ToolResult

ToolResult with format, token count, and strategy estimates.
Source code in packages/axm-smelt/src/axm_smelt/tools/check.py
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def execute(
    self,
    *,
    data: JsonValue = "",
    input_path: str | None = None,
    **kwargs: object,
) -> ToolResult:
    """Analyze data for token reduction opportunities.

    Args:
        data: Text or JSON data to analyze.
        input_path: Optional UTF-8 input file used when data is empty.

    Returns:
        ToolResult with format, token count, and strategy estimates.
    """
    try:
        if data is None:
            msg = "data must not be None"
            raise ValueError(msg)

        if isinstance(data, str):
            data = resolve_text_source(data, input_path, stdin=sys.stdin)

        from axm_smelt.core.pipeline import check

        if not isinstance(data, str):
            report = check(
                parsed=cast("dict[str, JsonValue] | list[JsonValue]", data)
            )
        else:
            report = check(data)

        ranked = sorted(
            report.strategy_estimates.items(),
            key=lambda kv: kv[1],
            reverse=True,
        )
        header = (
            f"smelt_check | {report.format.value} | {report.original_tokens} tok"
        )
        if ranked:
            body = "\n".join(f"  {name}: -{pct}%" for name, pct in ranked)
            text = f"{header}\n{body}"
        else:
            text = f"{header}\n  no waste detected"
        return ToolResult(
            success=True,
            data={
                "format": report.format.value,
                "tokens": report.original_tokens,
                "strategy_estimates": report.strategy_estimates,
            },
            text=text,
        )
    except Exception as exc:  # noqa: BLE001
        return ToolResult(success=False, error=str(exc))