import type { SemanticTddSourceSnapshot, SemanticTddTransitionEnvelope, SemanticTddTransitionDiagnosticCode, SemanticTddTransitionPhase } from "./workflow-semantic-tdd-transition-types.js";
export type SourceDeltaResult = {
    readonly kind: "none" | "structural" | "unrelated";
} | {
    readonly delta: SemanticTddTransitionEnvelope["sourceDelta"];
    readonly kind: "valid";
};
export declare function compareSnapshots(red: SemanticTddSourceSnapshot, green: SemanticTddSourceSnapshot, redPhase: SemanticTddTransitionPhase, greenPhase: SemanticTddTransitionPhase): readonly SemanticTddTransitionDiagnosticCode[];
export declare function sourceDelta(red: SemanticTddSourceSnapshot, green: SemanticTddSourceSnapshot): SourceDeltaResult;
export declare function buildEnvelope(red: SemanticTddTransitionPhase, green: SemanticTddTransitionPhase, greenSnapshot: SemanticTddSourceSnapshot, delta: {
    readonly delta?: SemanticTddTransitionEnvelope["sourceDelta"];
}): SemanticTddTransitionEnvelope;