ResolvedRedactionRule Class — langchain Architecture

Source Code

libs/langchain_v1/langchain/agents/middleware/_redaction.py lines 402–422

class ResolvedRedactionRule:
    """Resolved redaction rule ready for execution."""

    pii_type: str
    strategy: RedactionStrategy
    detector: Detector

    def apply(self, content: str) -> tuple[str, list[PIIMatch]]:
        """Apply this rule to content, returning new content and matches.

        Args:
            content: The text content to scan and redact.

        Returns:
            A tuple of (updated content, list of detected matches).
        """
        matches = self.detector(content)
        if not matches:
            return content, []
        updated = apply_strategy(content, matches, self.strategy)
        return updated, matches