Class CitationVerifier

Verify claims against provided sources.

Accepts the input in two shapes:

• string — the raw text the verifier should decompose into atomic claims before scoring. Uses the configured extractClaims callback (e.g. an LLM-driven decomposer) or the built-in sentence splitter. Best when the input is one block of LLM-generated prose and you want the verifier to handle decomposition.

• string[] — a list of pre-decomposed atomic claims, used as-is without any further extraction. Best when you already broke the prose into structured claims yourself, when you're verifying claims that came from a parser other than English sentence splitting, or when you want to scope verification to a specific subset of claims.

Both paths score each claim against each source via cosine similarity and (optionally) NLI contradiction detection, then return a single VerifiedResponse with per-claim verdicts.

Decompose raw text into atomic claims using the same logic verify(text, sources) uses internally.

Uses the constructor's extractClaims callback when provided, otherwise falls back to the built-in sentence splitter. Exposed publicly so callers who want to inspect or filter the claim list before verification can do so, then hand it back to verify(claims[], sources):

const claims = await verifier.extractClaims(llmText);
const filtered = claims.filter((c) => !c.startsWith('I think'));
const result = await verifier.verify(filtered, sources);
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