Halcyon

"""
Halcyon: Hallucination Suppression & Factual Entailment Engine
"""
from typing import List, Dict, Any
from pydantic import BaseModel, Field

class FactAssertion(BaseModel):
    claim: str
    grounding_corpus_ids: List[str]
    entailment_probability: float

class VerificationReport(BaseModel):
    passed: bool
    verified_claims: int
    flagged_hallucinations: int
    sanitized_response: str

class HalcyonHallucinationGuard:
    def __init__(self, confidence_floor: float = 0.88):
        self.confidence_floor = confidence_floor

    def verify_and_sanitize(self, claims: List[FactAssertion], original_text: str) -> VerificationReport:
        flagged = 0
        for item in claims:
            if item.entailment_probability < self.confidence_floor:
                flagged += 1
                original_text = original_text.replace(item.claim, "[REDACTED: UNVERIFIED FACTUAL CLAIM]")

        return VerificationReport(
            passed=(flagged == 0),
            verified_claims=len(claims) - flagged,
            flagged_hallucinations=flagged,
            sanitized_response=original_text
        )