diff --git a/Package.resolved b/Package.resolved
index 8cc2eb4..defa6a5 100644
--- a/Package.resolved
+++ b/Package.resolved
@@ -1,5 +1,5 @@
 {
-  "originHash" : "c3efcfd33bc1490f59ae406e4e5292027b2d01cafee9fc625652213505df50fb",
+  "originHash" : "300df15f5af26da69cfcf959d16ee1b9eada6101dc105a17fc01ddd244d476b4",
   "pins" : [
     {
       "identity" : "async-http-client",
@@ -397,6 +397,15 @@
         "version" : "1.6.3"
       }
     },
+    {
+      "identity" : "swift-tagged",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/pointfreeco/swift-tagged",
+      "state" : {
+        "revision" : "3907a9438f5b57d317001dc99f3f11b46882272b",
+        "version" : "0.10.0"
+      }
+    },
     {
       "identity" : "swift-url-routing",
       "kind" : "remoteSourceControl",
diff --git a/Package.swift b/Package.swift
index eef32ba..3eddbe8 100644
--- a/Package.swift
+++ b/Package.swift
@@ -26,6 +26,7 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-nio.git", from: "2.65.0"),
     .package(url: "https://github.com/pointfreeco/swift-dependencies", from: "1.0.0"),
     .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.12.0"),
+    .package(url: "https://github.com/pointfreeco/swift-tagged", from: "0.6.0"),
     .package(url: "https://github.com/pointfreeco/swift-url-routing.git", from: "0.6.2"),
     .package(url: "https://github.com/pointfreeco/vapor-routing.git", from: "0.1.3"),
     .package(url: "https://github.com/pointfreeco/swift-case-paths.git", from: "1.6.0"),
@@ -61,6 +62,12 @@ let package = Package(
         .product(name: "Vapor", package: "vapor"),
       ]
     ),
+    .testTarget(
+      name: "ApiRouteTests",
+      dependencies: [
+        .target(name: "ManualDCore")
+      ]
+    ),
     .target(
       name: "AuthClient",
       dependencies: [
@@ -137,22 +144,17 @@ let package = Package(
     .target(
       name: "ManualDCore",
       dependencies: [
+        .product(name: "CasePaths", package: "swift-case-paths"),
         .product(name: "Dependencies", package: "swift-dependencies"),
         .product(name: "Fluent", package: "fluent"),
+        .product(name: "Tagged", package: "swift-tagged"),
         .product(name: "URLRouting", package: "swift-url-routing"),
-        .product(name: "CasePaths", package: "swift-case-paths"),
-      ]
-    ),
-    .testTarget(
-      name: "ApiRouteTests",
-      dependencies: [
-        .target(name: "ManualDCore")
       ]
     ),
     .target(
       name: "ManualDClient",
       dependencies: [
-        "ManualDCore",
+        .target(name: "ManualDCore"),
         .product(name: "Dependencies", package: "swift-dependencies"),
         .product(name: "DependenciesMacros", package: "swift-dependencies"),
       ]
diff --git a/Sources/App/Middleware/DependenciesMiddleware.swift b/Sources/App/Middleware/DependenciesMiddleware.swift
index 8a16843..909d159 100644
--- a/Sources/App/Middleware/DependenciesMiddleware.swift
+++ b/Sources/App/Middleware/DependenciesMiddleware.swift
@@ -31,7 +31,7 @@ struct DependenciesMiddleware: AsyncMiddleware {
     try await values.yield {
       try await withDependencies {
         $0.apiController = apiController
-        $0.authClient = .live(on: request)
+        $0.auth = .live(on: request)
         $0.database = database
         // $0.dateFormatter = .liveValue
         $0.viewController = viewController
diff --git a/Sources/AuthClient/Interface.swift b/Sources/AuthClient/Interface.swift
index d8817b8..7c90812 100644
--- a/Sources/AuthClient/Interface.swift
+++ b/Sources/AuthClient/Interface.swift
@@ -5,17 +5,23 @@ import ManualDCore
 import Vapor
 
 extension DependencyValues {
-  public var authClient: AuthClient {
+  /// Authentication dependency, for handling authentication tasks.
+  public var auth: AuthClient {
     get { self[AuthClient.self] }
     set { self[AuthClient.self] = newValue }
   }
 }
 
+/// Represents authentication tasks that are used in the application.
 @DependencyClient
 public struct AuthClient: Sendable {
+  /// Create a new user and log them in.
   public var createAndLogin: @Sendable (User.Create) async throws -> User
+  /// Get the current user.
   public var currentUser: @Sendable () throws -> User
+  /// Login a user.
   public var login: @Sendable (User.Login) async throws -> User
+  /// Logout a user.
   public var logout: @Sendable () throws -> Void
 }
 
diff --git a/Sources/DatabaseClient/Interface.swift b/Sources/DatabaseClient/Interface.swift
index 0af0de2..daf7862 100644
--- a/Sources/DatabaseClient/Interface.swift
+++ b/Sources/DatabaseClient/Interface.swift
@@ -4,22 +4,33 @@ import FluentKit
 import ManualDCore
 
 extension DependencyValues {
+  /// The database dependency.
   public var database: DatabaseClient {
     get { self[DatabaseClient.self] }
     set { self[DatabaseClient.self] = newValue }
   }
 }
 
+/// Represents the database interactions used by the application.
 @DependencyClient
 public struct DatabaseClient: Sendable {
+  /// Database migrations.
   public var migrations: Migrations
+  /// Interactions with the projects table.
   public var projects: Projects
+  /// Interactions with the rooms table.
   public var rooms: Rooms
+  /// Interactions with the equipment table.
   public var equipment: Equipment
+  /// Interactions with the component losses table.
   public var componentLosses: ComponentLosses
+  /// Interactions with the equivalent lengths table.
   public var equivalentLengths: EquivalentLengths
+  /// Interactions with the users table.
   public var users: Users
+  /// Interactions with the user profiles table.
   public var userProfiles: UserProfiles
+  /// Interactions with the trunk sizes table.
   public var trunkSizes: TrunkSizes
 
   @DependencyClient
@@ -147,23 +158,3 @@ extension DatabaseClient: TestDependencyKey {
     )
   }
 }
-
-extension DatabaseClient.Migrations: DependencyKey {
-  public static let testValue = Self()
-
-  public static let liveValue = Self(
-    all: {
-      [
-        Project.Migrate(),
-        User.Migrate(),
-        User.Token.Migrate(),
-        User.Profile.Migrate(),
-        ComponentPressureLoss.Migrate(),
-        EquipmentInfo.Migrate(),
-        Room.Migrate(),
-        EquivalentLength.Migrate(),
-        TrunkSize.Migrate(),
-      ]
-    }
-  )
-}
diff --git a/Sources/DatabaseClient/Internal/ComponentPressureLoss.swift b/Sources/DatabaseClient/Internal/ComponentLosses.swift
similarity index 100%
rename from Sources/DatabaseClient/Internal/ComponentPressureLoss.swift
rename to Sources/DatabaseClient/Internal/ComponentLosses.swift
diff --git a/Sources/DatabaseClient/Internal/EffectiveLength.swift b/Sources/DatabaseClient/Internal/EquivalentLengths.swift
similarity index 100%
rename from Sources/DatabaseClient/Internal/EffectiveLength.swift
rename to Sources/DatabaseClient/Internal/EquivalentLengths.swift
diff --git a/Sources/DatabaseClient/Internal/Migrations.swift b/Sources/DatabaseClient/Internal/Migrations.swift
new file mode 100644
index 0000000..b5dd7ac
--- /dev/null
+++ b/Sources/DatabaseClient/Internal/Migrations.swift
@@ -0,0 +1,22 @@
+import Dependencies
+import ManualDCore
+
+extension DatabaseClient.Migrations: DependencyKey {
+  public static let testValue = Self()
+
+  public static let liveValue = Self(
+    all: {
+      [
+        Project.Migrate(),
+        User.Migrate(),
+        User.Token.Migrate(),
+        User.Profile.Migrate(),
+        ComponentPressureLoss.Migrate(),
+        EquipmentInfo.Migrate(),
+        Room.Migrate(),
+        EquivalentLength.Migrate(),
+        TrunkSize.Migrate(),
+      ]
+    }
+  )
+}
diff --git a/Sources/DatabaseClient/Internal/UserProfile.swift b/Sources/DatabaseClient/Internal/UserProfiles.swift
similarity index 100%
rename from Sources/DatabaseClient/Internal/UserProfile.swift
rename to Sources/DatabaseClient/Internal/UserProfiles.swift
diff --git a/Sources/FileClient/Interface.swift b/Sources/FileClient/Interface.swift
index 359f8ea..346b3fb 100644
--- a/Sources/FileClient/Interface.swift
+++ b/Sources/FileClient/Interface.swift
@@ -4,6 +4,7 @@ import Foundation
 import Vapor
 
 extension DependencyValues {
+  /// Dependency used for file operations.
   public var fileClient: FileClient {
     get { self[FileClient.self] }
     set { self[FileClient.self] = newValue }
@@ -14,9 +15,27 @@ extension DependencyValues {
 public struct FileClient: Sendable {
   public typealias OnCompleteHandler = @Sendable () async throws -> Void
 
-  public var writeFile: @Sendable (String, String) async throws -> Void
-  public var removeFile: @Sendable (String) async throws -> Void
-  public var streamFile: @Sendable (String, @escaping OnCompleteHandler) async throws -> Response
+  /// Write contents to a file.
+  ///
+  /// > Warning: This will overwrite a file if it exists.
+  public var writeFile: @Sendable (_ contents: String, _ path: String) async throws -> Void
+  /// Remove a file.
+  public var removeFile: @Sendable (_ path: String) async throws -> Void
+  /// Stream a file.
+  public var streamFile:
+    @Sendable (_ path: String, @escaping OnCompleteHandler) async throws -> Response
+
+  /// Stream a file at the given path.
+  ///
+  /// - Paramters:
+  ///   - path: The path to the file to stream.
+  ///   - onComplete: Completion handler to run when done streaming the file.
+  public func streamFile(
+    at path: String,
+    onComplete: @escaping OnCompleteHandler = {}
+  ) async throws -> Response {
+    try await streamFile(path, onComplete)
+  }
 }
 
 extension FileClient: TestDependencyKey {
diff --git a/Sources/ManualDClient/Helpers.swift b/Sources/ManualDClient/Helpers.swift
index a571926..79d45bd 100644
--- a/Sources/ManualDClient/Helpers.swift
+++ b/Sources/ManualDClient/Helpers.swift
@@ -97,16 +97,16 @@ func roundSize(_ size: Double) throws -> Int {
   }
 }
 
-func velocity(cfm: Int, roundSize: Int) -> Int {
-  let cfm = Double(cfm)
+func velocity(cfm: CFM, roundSize: Int) -> Int {
+  let cfm = Double(cfm.rawValue)
   let roundSize = Double(roundSize)
   let velocity = cfm / (pow(roundSize / 24, 2) * 3.14)
   return Int(round(velocity))
 }
 
-func flexSize(_ request: ManualDClient.DuctSizeRequest) throws -> Int {
-  let cfm = pow(Double(request.designCFM), 0.4)
-  let fr = pow(request.frictionRate / 1.76, 0.2)
+func flexSize(_ cfm: CFM, _ frictionRate: DesignFrictionRate) throws -> Int {
+  let cfm = pow(Double(cfm.rawValue), 0.4)
+  let fr = pow(frictionRate.rawValue / 1.76, 0.2)
   let size = 0.55 * (cfm / fr)
   return try roundSize(size)
 }
diff --git a/Sources/ManualDClient/Interface.swift b/Sources/ManualDClient/Interface.swift
index 89ba90e..60aa216 100644
--- a/Sources/ManualDClient/Interface.swift
+++ b/Sources/ManualDClient/Interface.swift
@@ -4,6 +4,7 @@ import Logging
 import ManualDCore
 
 extension DependencyValues {
+  /// Dependency that performs manual-d duct sizing calculations.
   public var manualD: ManualDClient {
     get { self[ManualDClient.self] }
     set { self[ManualDClient.self] = newValue }
@@ -15,12 +16,24 @@ extension DependencyValues {
 ///
 @DependencyClient
 public struct ManualDClient: Sendable {
-  public var ductSize: @Sendable (DuctSizeRequest) async throws -> DuctSizeResponse
+  public var ductSize: @Sendable (CFM, DesignFrictionRate) async throws -> DuctSizeResponse
   public var frictionRate: @Sendable (FrictionRateRequest) async throws -> FrictionRate
-  public var totalEquivalentLength: @Sendable (TotalEquivalentLengthRequest) async throws -> Int
   public var rectangularSize:
     @Sendable (RectangularSizeRequest) async throws -> RectangularSizeResponse
 
+  public func ductSize(
+    cfm designCFM: Int,
+    frictionRate designFrictionRate: Double
+  ) async throws -> DuctSizeResponse {
+    try await ductSize(.init(rawValue: designCFM), .init(rawValue: designFrictionRate))
+  }
+
+  public func ductSize(
+    cfm designCFM: Double,
+    frictionRate designFrictionRate: Double
+  ) async throws -> DuctSizeResponse {
+    try await ductSize(.init(rawValue: Int(designCFM)), .init(rawValue: designFrictionRate))
+  }
 }
 
 extension ManualDClient: TestDependencyKey {
@@ -29,19 +42,6 @@ extension ManualDClient: TestDependencyKey {
 
 extension ManualDClient {
 
-  public struct DuctSizeRequest: Codable, Equatable, Sendable {
-    public let designCFM: Int
-    public let frictionRate: Double
-
-    public init(
-      designCFM: Int,
-      frictionRate: Double
-    ) {
-      self.designCFM = designCFM
-      self.frictionRate = frictionRate
-    }
-  }
-
   public struct DuctSizeResponse: Codable, Equatable, Sendable {
 
     public let calculatedSize: Double
@@ -82,31 +82,14 @@ extension ManualDClient {
   public struct FrictionRateResponse: Codable, Equatable, Sendable {
 
     public let availableStaticPressure: Double
-    public let frictionRate: Double
+    public let frictionRate: DesignFrictionRate
 
-    public init(availableStaticPressure: Double, frictionRate: Double) {
+    public init(availableStaticPressure: Double, frictionRate: DesignFrictionRate) {
       self.availableStaticPressure = availableStaticPressure
       self.frictionRate = frictionRate
     }
   }
 
-  public struct TotalEquivalentLengthRequest: Codable, Equatable, Sendable {
-
-    public let trunkLengths: [Int]
-    public let runoutLengths: [Int]
-    public let effectiveLengthGroups: [EffectiveLengthGroup]
-
-    public init(
-      trunkLengths: [Int],
-      runoutLengths: [Int],
-      effectiveLengthGroups: [EffectiveLengthGroup]
-    ) {
-      self.trunkLengths = trunkLengths
-      self.runoutLengths = runoutLengths
-      self.effectiveLengthGroups = effectiveLengthGroups
-    }
-  }
-
   public struct RectangularSizeRequest: Codable, Equatable, Sendable {
     public let roundSize: Int
     public let height: Int
diff --git a/Sources/ManualDClient/Live.swift b/Sources/ManualDClient/Live.swift
index 62cd048..3ee2193 100644
--- a/Sources/ManualDClient/Live.swift
+++ b/Sources/ManualDClient/Live.swift
@@ -4,19 +4,19 @@ import ManualDCore
 
 extension ManualDClient: DependencyKey {
   public static let liveValue: Self = .init(
-    ductSize: { request in
-      guard request.designCFM > 0 else {
+    ductSize: { cfm, frictionRate in
+      guard cfm > 0 else {
         throw ManualDError(message: "Design CFM should be greater than 0.")
       }
-      let fr = pow(request.frictionRate, 0.5)
-      let ductulatorSize = pow(Double(request.designCFM) / (3.12 * fr), 0.38)
+      let fr = pow(frictionRate.rawValue, 0.5)
+      let ductulatorSize = pow(Double(cfm.rawValue) / (3.12 * fr), 0.38)
       let finalSize = try roundSize(ductulatorSize)
-      let flexSize = try flexSize(request)
+      let flexSize = try flexSize(cfm, frictionRate)
       return .init(
         calculatedSize: ductulatorSize,
         finalSize: finalSize,
         flexSize: flexSize,
-        velocity: velocity(cfm: request.designCFM, roundSize: finalSize)
+        velocity: velocity(cfm: cfm, roundSize: finalSize)
       )
     },
     frictionRate: { request in
@@ -28,14 +28,17 @@ extension ManualDClient: DependencyKey {
       let totalComponentLosses = request.componentPressureLosses.total
       let availableStaticPressure = request.externalStaticPressure - totalComponentLosses
       let frictionRate = availableStaticPressure * 100.0 / Double(request.totalEffectiveLength)
-      return .init(availableStaticPressure: availableStaticPressure, value: frictionRate)
-    },
-    totalEquivalentLength: { request in
-      let trunkLengths = request.trunkLengths.reduce(0) { $0 + $1 }
-      let runoutLengths = request.runoutLengths.reduce(0) { $0 + $1 }
-      let groupLengths = request.effectiveLengthGroups.totalEffectiveLength
-      return trunkLengths + runoutLengths + groupLengths
+      return .init(
+        availableStaticPressure: availableStaticPressure,
+        value: .init(rawValue: frictionRate)
+      )
     },
+    // totalEquivalentLength: { request in
+    //   let trunkLengths = request.trunkLengths.reduce(0) { $0 + $1 }
+    //   let runoutLengths = request.runoutLengths.reduce(0) { $0 + $1 }
+    //   let groupLengths = request.effectiveLengthGroups.totalEffectiveLength
+    //   return trunkLengths + runoutLengths + groupLengths
+    // },
     rectangularSize: { request in
       let width = (Double.pi * (pow(Double(request.roundSize) / 2.0, 2.0))) / Double(request.height)
       return .init(height: request.height, width: Int(width.rounded(.toNearestOrEven)))
diff --git a/Sources/ManualDCore/Extensions/Numbers+string.swift b/Sources/ManualDCore/Extensions/Numbers+string.swift
index c633eb5..834689d 100644
--- a/Sources/ManualDCore/Extensions/Numbers+string.swift
+++ b/Sources/ManualDCore/Extensions/Numbers+string.swift
@@ -1,4 +1,17 @@
 import Foundation
+import Tagged
+
+extension Tagged where RawValue == Double {
+  public func string(digits: Int = 2) -> String {
+    rawValue.string(digits: digits)
+  }
+}
+
+extension Tagged where RawValue == Int {
+  public func string() -> String {
+    rawValue.string()
+  }
+}
 
 extension Double {
 
diff --git a/Sources/ManualDCore/FrictionRate.swift b/Sources/ManualDCore/FrictionRate.swift
index 5491529..79d2acd 100644
--- a/Sources/ManualDCore/FrictionRate.swift
+++ b/Sources/ManualDCore/FrictionRate.swift
@@ -7,13 +7,13 @@ public struct FrictionRate: Codable, Equatable, Sendable {
   /// minus the ``ComponentPressureLoss``es for the project.
   public let availableStaticPressure: Double
   /// The calculated design friction rate value.
-  public let value: Double
+  public let value: DesignFrictionRate
   /// Whether the design friction rate is within a valid range.
   public var hasErrors: Bool { error != nil }
 
   public init(
     availableStaticPressure: Double,
-    value: Double
+    value: DesignFrictionRate
   ) {
     self.availableStaticPressure = availableStaticPressure
     self.value = value
diff --git a/Sources/ManualDCore/TaggedTypes.swift b/Sources/ManualDCore/TaggedTypes.swift
new file mode 100644
index 0000000..4b2a84f
--- /dev/null
+++ b/Sources/ManualDCore/TaggedTypes.swift
@@ -0,0 +1,7 @@
+import Tagged
+
+public enum CFMTag {}
+public typealias CFM = Tagged<CFMTag, Int>
+
+public enum DesignFrictionRateTag {}
+public typealias DesignFrictionRate = Tagged<DesignFrictionRateTag, Double>
diff --git a/Sources/ProjectClient/Internal/ManualDClient+calculateDuctSizes.swift b/Sources/ProjectClient/Internal/ManualDClient+calculateDuctSizes.swift
index d0c48c1..d66a71c 100644
--- a/Sources/ProjectClient/Internal/ManualDClient+calculateDuctSizes.swift
+++ b/Sources/ProjectClient/Internal/ManualDClient+calculateDuctSizes.swift
@@ -52,7 +52,8 @@ extension ManualDClient {
       let coolingCFM = coolingPercent * Double(sharedRequest.equipmentInfo.coolingCFM)
       let designCFM = DuctSizes.DesignCFM(heating: heatingCFM, cooling: coolingCFM)
       let sizes = try await self.ductSize(
-        .init(designCFM: Int(designCFM.value), frictionRate: sharedRequest.designFrictionRate)
+        cfm: designCFM.value,
+        frictionRate: sharedRequest.designFrictionRate
       )
 
       for n in 1...room.registerCount {
@@ -111,7 +112,8 @@ extension ManualDClient {
       let coolingCFM = coolingPercent * Double(sharedRequest.equipmentInfo.coolingCFM)
       let designCFM = DuctSizes.DesignCFM(heating: heatingCFM, cooling: coolingCFM)
       let sizes = try await self.ductSize(
-        .init(designCFM: Int(designCFM.value), frictionRate: sharedRequest.designFrictionRate)
+        cfm: designCFM.value,
+        frictionRate: sharedRequest.designFrictionRate
       )
       var width: Int? = nil
       if let height = trunk.height {
diff --git a/Sources/ProjectClient/Live.swift b/Sources/ProjectClient/Live.swift
index 5f9a13a..fa0e4ee 100644
--- a/Sources/ProjectClient/Live.swift
+++ b/Sources/ProjectClient/Live.swift
@@ -42,13 +42,10 @@ extension ProjectClient: DependencyKey {
           request: database.makePdfRequest(projectID)
         )
 
-        let response = try await fileClient.streamFile(
-          pdfResponse.pdfPath,
-          {
-            try await fileClient.removeFile(pdfResponse.htmlPath)
-            try await fileClient.removeFile(pdfResponse.pdfPath)
-          }
-        )
+        let response = try await fileClient.streamFile(at: pdfResponse.pdfPath) {
+          try await fileClient.removeFile(pdfResponse.htmlPath)
+          try await fileClient.removeFile(pdfResponse.pdfPath)
+        }
 
         response.headers.replaceOrAdd(name: .contentType, value: "application/octet-stream")
         response.headers.replaceOrAdd(
diff --git a/Sources/Styleguide/Badge.swift b/Sources/Styleguide/Badge.swift
index 8384ac3..b1016c8 100644
--- a/Sources/Styleguide/Badge.swift
+++ b/Sources/Styleguide/Badge.swift
@@ -1,4 +1,5 @@
 import Elementary
+import Tagged
 
 public struct Badge<Inner: HTML>: HTML, Sendable where Inner: Sendable {
 
@@ -25,4 +26,12 @@ extension Badge where Inner == Number {
   public init(number: Double, digits: Int = 2) {
     self.inner = Number(number, digits: digits)
   }
+
+  public init<T>(number: Tagged<T, Int>) {
+    self.inner = Number(number.rawValue)
+  }
+
+  public init<T>(number: Tagged<T, Double>, digits: Int = 2) {
+    self.inner = Number(number.rawValue, digits: digits)
+  }
 }
diff --git a/Sources/ViewController/Interface.swift b/Sources/ViewController/Interface.swift
index 36012b5..c7c974d 100644
--- a/Sources/ViewController/Interface.swift
+++ b/Sources/ViewController/Interface.swift
@@ -54,14 +54,14 @@ extension ViewController: DependencyKey {
 extension ViewController.Request {
 
   func currentUser() throws -> User {
-    @Dependency(\.authClient.currentUser) var currentUser
+    @Dependency(\.auth.currentUser) var currentUser
     return try currentUser()
   }
 
   func authenticate(
     _ login: User.Login
   ) async throws -> User {
-    @Dependency(\.authClient) var auth
+    @Dependency(\.auth) var auth
     return try await auth.login(login)
   }
 
@@ -69,7 +69,7 @@ extension ViewController.Request {
   func createAndAuthenticate(
     _ signup: User.Create
   ) async throws -> User {
-    @Dependency(\.authClient) var auth
+    @Dependency(\.auth) var auth
     return try await auth.createAndLogin(signup)
   }
 }
diff --git a/Tests/ManualDClientTests/ManualDClientTests.swift b/Tests/ManualDClientTests/ManualDClientTests.swift
index ce5d00f..9730792 100644
--- a/Tests/ManualDClientTests/ManualDClientTests.swift
+++ b/Tests/ManualDClientTests/ManualDClientTests.swift
@@ -24,59 +24,13 @@ struct ManualDClientTests {
 
   @Test
   func ductSize() async throws {
-    let response = try await manualD.ductSize(
-      .init(designCFM: 88, frictionRate: 0.06)
-    )
+    let response = try await manualD.ductSize(88, 0.06)
     #expect(numberFormatter.string(for: response.calculatedSize) == "6.07")
     #expect(response.finalSize == 7)
     #expect(response.flexSize == 7)
     #expect(response.velocity == 329)
   }
 
-  // @Test
-  // func frictionRate() async throws {
-  //   let response = try await manualD.frictionRate(
-  //     .init(
-  //       externalStaticPressure: 0.5,
-  //       componentPressureLosses: .mock,
-  //       totalEffectiveLength: 185
-  //     )
-  //   )
-  //   #expect(numberFormatter.string(for: response.availableStaticPressure) == "0.11")
-  //   #expect(numberFormatter.string(for: response.frictionRate) == "0.06")
-  // }
-
-  // @Test
-  // func frictionRateFails() async throws {
-  //   await #expect(throws: ManualDError.self) {
-  //     _ = try await manualD.frictionRate(
-  //       .init(
-  //         externalStaticPressure: 0.5,
-  //         componentPressureLosses: .mock,
-  //         totalEffectiveLength: 0
-  //       )
-  //     )
-  //   }
-  // }
-
-  @Test
-  func totalEffectiveLength() async throws {
-    let response = try await manualD.totalEquivalentLength(
-      .init(
-        trunkLengths: [25],
-        runoutLengths: [10],
-        effectiveLengthGroups: [
-          // NOTE: These are made up and may not correspond to actual manual-d group tel's.
-          EffectiveLengthGroup(group: 1, letter: "a", effectiveLength: 20, category: .supply),
-          EffectiveLengthGroup(group: 2, letter: "a", effectiveLength: 30, category: .supply),
-          EffectiveLengthGroup(group: 3, letter: "a", effectiveLength: 10, category: .supply),
-          EffectiveLengthGroup(group: 12, letter: "a", effectiveLength: 10, category: .supply),
-        ]
-      )
-    )
-    #expect(response == 105)
-  }
-
   @Test
   func equivalentRectangularDuct() async throws {
     let response = try await manualD.rectangularSize(.init(round: 7, height: 8))
diff --git a/Tests/ViewControllerTests/ViewControllerTests.swift b/Tests/ViewControllerTests/ViewControllerTests.swift
index 0452eca..96178b8 100644
--- a/Tests/ViewControllerTests/ViewControllerTests.swift
+++ b/Tests/ViewControllerTests/ViewControllerTests.swift
@@ -18,7 +18,7 @@ struct ViewControllerTests {
   func login() async throws {
     try await withDependencies {
       $0.viewController = .liveValue
-      $0.authClient = .failing
+      $0.auth = .failing
     } operation: {
       @Dependency(\.viewController) var viewController
 
@@ -31,7 +31,7 @@ struct ViewControllerTests {
   func signup() async throws {
     try await withDependencies {
       $0.viewController = .liveValue
-      $0.authClient = .failing
+      $0.auth = .failing
     } operation: {
       @Dependency(\.viewController) var viewController
 
@@ -163,7 +163,7 @@ struct ViewControllerTests {
 
     return try await withDependencies {
       $0.viewController = .liveValue
-      $0.authClient.currentUser = { user }
+      $0.auth.currentUser = { user }
       $0.database.userProfiles.fetch = { _ in profile }
       $0.manualD = .liveValue
       try await updateDependencies(&$0)