/**
 * The correlation engine.
 *
 * Given any combination of three evidence sources —
 *   1. the device error (Video node errorCode/errorInfo), and/or
 *   2. the parsed manifest (codecs/container/DRM/segments), and/or
 *   3. the HTTP traffic from a Charles/HAR session —
 * produce ranked, plain-English root-cause findings, each with the evidence it
 * relied on, a confidence level, a suggested fix, and a doc link.
 *
 * Confidence rises when sources agree. For example, `errorCode -6` (DRM)
 * corroborated by a license POST returning 403 in the Charles session is a
 * high-confidence diagnosis; a manifest-only hint ("declares Opus audio") is
 * low confidence because the device might still play it.
 */
import type { NormalizedRokuError } from './error-info.js';
import type { ManifestSummary } from './manifest.js';
import type { CharlesSession } from './charles.js';
export type Confidence = 'high' | 'medium' | 'low';
/**
 * How badly the issue breaks playback:
 *  - 'blocking'  : the stream will not play at all (decoder/network/DRM/empty).
 *  - 'degraded'  : the stream plays but is impaired (e.g. silent audio).
 *  - 'advisory'  : a hint that may or may not matter (segment length, signaling).
 */
export type Severity = 'blocking' | 'degraded' | 'advisory';
export interface Finding {
    id: string;
    cause: string;
    /** Verbatim evidence strings that support this finding. */
    evidence: string[];
    confidence: Confidence;
    /** Playback impact, used to rank a won't-play issue above a plays-but-silent one. */
    severity: Severity;
    fix: string;
    docUrl: string;
}
export interface DiagnosisInput {
    error?: NormalizedRokuError;
    manifest?: ManifestSummary;
    charles?: CharlesSession;
    /** DRM hint the developer told us they configured. */
    declaredDrm?: {
        keySystem?: string;
    };
}
export interface Diagnosis {
    verdict: string;
    findings: Finding[];
    specVersion: string;
    specDisclaimer: string;
}
export declare function diagnose(input: DiagnosisInput): Diagnosis;
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