Everything works well and good structure.

Sources/MusicBrainz/Models/Shared/ArtistCredit.swift

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+import Foundation
+
+public struct ArtistCredit: Codable, Sendable {
+	public let name: String
+	public let artist: Artist?
+	public let joinphrase: String?
+}

Sources/MusicBrainz/Models/Shared/CoverArt.swift

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+import Foundation
+
+public struct CoverArtImage: Codable, Sendable {
+	public let image: String
+	public let thumbnails: [String: String]
+	public let types: [String]
+	public let front: Bool
+	public let back: Bool
+	public let edit: Int
+	public let comment: String
+	public let id: String
+}
+
+public struct CoverArtResponse: Codable, Sendable {
+	public let images: [CoverArtImage]
+	public let release: String
+
+	public var frontImage: CoverArtImage? {
+		images.first { $0.front }
+	}
+}

Sources/MusicBrainz/Models/Shared/LifeSpan.swift

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+import Foundation
+
+public struct LifeSpan: Codable, Sendable {
+	public let begin: String?
+	public let end: String?
+	public let ended: Bool?
+}

Sources/MusicBrainz/Models/Shared/Relation.swift

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+import Foundation
+
+public struct Relation: Codable, Sendable {
+	public let type: String
+	public let direction: String
+	public let url: URLResource?
+	public let artist: Artist?
+	public let release: Release?
+	// Add other entities as needed
+
+	enum CodingKeys: String, CodingKey {
+		case type, direction, url, artist, release
+	}
+}

Sources/MusicBrainz/Models/Shared/URLResource.swift

@@ -0,0 +1,6 @@
+import Foundation
+
+public struct URLResource: Codable, Sendable {
+	public let id: String
+	public let resource: String
+}