diff --git a/src/cli/Descript.CLI/Commands/ExportTranscriptRequestOptionSet.g.cs b/src/cli/Descript.CLI/Commands/ExportTranscriptRequestOptionSet.g.cs
index 6bf144c..1c541f4 100644
--- a/src/cli/Descript.CLI/Commands/ExportTranscriptRequestOptionSet.g.cs
+++ b/src/cli/Descript.CLI/Commands/ExportTranscriptRequestOptionSet.g.cs
@@ -6,7 +6,7 @@ namespace Descript.CLI.Commands;
 
 internal sealed record ExportTranscriptRequestOptionSet(
     Option<global::System.Guid> ProjectId,
-                     Option<global::System.Guid?> CompositionId,
+                     Option<string?> CompositionId,
                      Option<global::Descript.ExportTranscriptRequestFormat> Format,
                      Option<global::Descript.ExportTranscriptRequestIncludeSpeakerLabels?> IncludeSpeakerLabels,
                      Option<bool?> IncludeMarkers)
@@ -22,9 +22,15 @@ public static ExportTranscriptRequestOptionSet Create(string? prefix = null)
                     Description = @"The ID of the project to export from.",
                     Required = true,
                 },
-                CompositionId: new Option<global::System.Guid?>($"--{normalizedPrefix}composition-id")
+                CompositionId: new Option<string?>($"--{normalizedPrefix}composition-id")
                 {
-                    Description = @"The ID of the composition to export. Defaults to the first composition.",
+                    Description = @"Composition to export. If omitted, the first composition in the project is used.
+
+Accepts any of the following formats:
+- A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)
+- A 5-character short ID from a Descript URL (e.g. `39677`)
+- A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)
+",
                 },
                 Format: new Option<global::Descript.ExportTranscriptRequestFormat>($"--{normalizedPrefix}format")
                 {
diff --git a/src/cli/Descript.CLI/Descript.CLI.csproj b/src/cli/Descript.CLI/Descript.CLI.csproj
index e0ac932..bccb579 100644
--- a/src/cli/Descript.CLI/Descript.CLI.csproj
+++ b/src/cli/Descript.CLI/Descript.CLI.csproj
@@ -18,11 +18,11 @@
     <None Include="README.md" Pack="true" PackagePath="\" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="MinVer" Version="8.0.0">
+    <PackageReference Include="MinVer" Version="7.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.CommandLine" Version="2.0.11" />
+    <PackageReference Include="System.CommandLine" Version="2.0.7" />
     <ProjectReference Include="../../libs/Descript/Descript.csproj" />
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscript.g.cs b/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscript.g.cs
index c72e7e2..2c8b664 100644
--- a/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscript.g.cs
+++ b/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscript.g.cs
@@ -605,7 +605,11 @@ partial void ProcessExportTranscriptResponseContent(
         /// Example: 9f36ee32-5a2c-47e7-b1a3-94991d3e3ddb
         /// </param>
         /// <param name="compositionId">
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </param>
         /// <param name="format">
@@ -634,7 +638,7 @@ partial void ProcessExportTranscriptResponseContent(
         public async global::System.Threading.Tasks.Task<string> ExportTranscriptAsync(
             global::System.Guid projectId,
             global::Descript.ExportTranscriptRequestFormat format,
-            global::System.Guid? compositionId = default,
+            string? compositionId = default,
             global::Descript.ExportTranscriptRequestIncludeSpeakerLabels? includeSpeakerLabels = default,
             bool? includeMarkers = default,
             global::Descript.ExportTranscriptRequestTimecodes? timecodes = default,
diff --git a/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscriptAsBytes.g.cs b/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscriptAsBytes.g.cs
index d63cd25..1af9daf 100644
--- a/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscriptAsBytes.g.cs
+++ b/src/libs/Descript/Generated/Descript.ApiEndpointsClient.ExportTranscriptAsBytes.g.cs
@@ -1082,7 +1082,11 @@ partial void ProcessExportTranscriptAsBytesResponseContent(
         /// Example: 9f36ee32-5a2c-47e7-b1a3-94991d3e3ddb
         /// </param>
         /// <param name="compositionId">
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </param>
         /// <param name="format">
@@ -1111,7 +1115,7 @@ partial void ProcessExportTranscriptAsBytesResponseContent(
         public async global::System.Threading.Tasks.Task<byte[]> ExportTranscriptAsBytesAsync(
             global::System.Guid projectId,
             global::Descript.ExportTranscriptRequestFormat format,
-            global::System.Guid? compositionId = default,
+            string? compositionId = default,
             global::Descript.ExportTranscriptRequestIncludeSpeakerLabels? includeSpeakerLabels = default,
             bool? includeMarkers = default,
             global::Descript.ExportTranscriptRequestTimecodes? timecodes = default,
diff --git a/src/libs/Descript/Generated/Descript.AutoSDKHttpResponse.g.cs b/src/libs/Descript/Generated/Descript.AutoSDKHttpResponse.g.cs
index 7401d04..7b01926 100644
--- a/src/libs/Descript/Generated/Descript.AutoSDKHttpResponse.g.cs
+++ b/src/libs/Descript/Generated/Descript.AutoSDKHttpResponse.g.cs
@@ -118,4 +118,111 @@ public AutoSDKHttpResponse(
         /// </summary>
         public T Body { get; }
     }
+
+    /// <summary>
+    /// Represents the result of a conditional HTTP request. A not-modified response has no body
+    /// and preserves the response entity tag so callers can keep their cached representation.
+    /// </summary>
+    public sealed class AutoSDKConditionalResponse<T>
+    {
+        internal AutoSDKConditionalResponse(
+            bool notModified,
+            string? entityTag,
+            global::Descript.AutoSDKHttpResponse<T>? response)
+        {
+            NotModified = notModified;
+            EntityTag = entityTag;
+            Response = response;
+        }
+
+        /// <summary>Gets whether the server returned HTTP 304 Not Modified.</summary>
+        public bool NotModified { get; }
+
+        /// <summary>Gets the response ETag, when one was supplied.</summary>
+        public string? EntityTag { get; }
+
+        /// <summary>Gets the successful response, or null when <see cref="NotModified"/> is true.</summary>
+        public global::Descript.AutoSDKHttpResponse<T>? Response { get; }
+    }
+
+    /// <summary>
+    /// Helpers for standards-based ETag conditional requests. Generated clients already expose
+    /// request headers through <see cref="AutoSDKRequestOptions"/> and successful response
+    /// headers through <see cref="AutoSDKHttpResponse"/>; this helper also turns an OpenAPI
+    /// <c>304</c> error response into a typed not-modified result.
+    /// </summary>
+    public static class AutoSDKConditionalRequests
+    {
+        /// <summary>
+        /// Executes a generated <c>AsResponseAsync</c> method with an optional If-None-Match header.
+        /// </summary>
+        public static async global::System.Threading.Tasks.Task<global::Descript.AutoSDKConditionalResponse<T>> SendAsync<T>(
+            global::System.Func<global::Descript.AutoSDKRequestOptions, global::System.Threading.CancellationToken, global::System.Threading.Tasks.Task<global::Descript.AutoSDKHttpResponse<T>>> send,
+            string? entityTag = null,
+            global::Descript.AutoSDKRequestOptions? requestOptions = null,
+            global::System.Threading.CancellationToken cancellationToken = default)
+        {
+            send = send ?? throw new global::System.ArgumentNullException(nameof(send));
+            requestOptions = CloneRequestOptions(requestOptions);
+            if (!string.IsNullOrWhiteSpace(entityTag))
+            {
+                requestOptions.Headers["If-None-Match"] = entityTag!;
+            }
+
+            try
+            {
+                var response = await send(requestOptions, cancellationToken).ConfigureAwait(false);
+                return new global::Descript.AutoSDKConditionalResponse<T>(
+                    notModified: false,
+                    entityTag: GetEntityTag(response.Headers),
+                    response: response);
+            }
+            catch (global::Descript.ApiException exception)
+                when (exception.StatusCode == global::System.Net.HttpStatusCode.NotModified)
+            {
+                return new global::Descript.AutoSDKConditionalResponse<T>(
+                    notModified: true,
+                    entityTag: GetEntityTag(exception.ResponseHeaders) ?? entityTag,
+                    response: null);
+            }
+        }
+
+        private static global::Descript.AutoSDKRequestOptions CloneRequestOptions(
+            global::Descript.AutoSDKRequestOptions? source)
+        {
+            var clone = new global::Descript.AutoSDKRequestOptions();
+            if (source == null)
+            {
+                return clone;
+            }
+
+            foreach (var header in source.Headers)
+            {
+                clone.Headers[header.Key] = header.Value;
+            }
+
+            foreach (var parameter in source.QueryParameters)
+            {
+                clone.QueryParameters[parameter.Key] = parameter.Value;
+            }
+
+            clone.Timeout = source.Timeout;
+            clone.Retry = source.Retry;
+            clone.ReadResponseAsString = source.ReadResponseAsString;
+            clone.Authorizations = source.Authorizations;
+            return clone;
+        }
+
+        /// <summary>Gets the first ETag header value from a generated response header map.</summary>
+        public static string? GetEntityTag(
+            global::System.Collections.Generic.Dictionary<string, global::System.Collections.Generic.IEnumerable<string>>? headers)
+        {
+            if (headers == null || !headers.TryGetValue("ETag", out var values))
+            {
+                return null;
+            }
+
+            return global::System.Linq.Enumerable.FirstOrDefault(values);
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscript.g.cs b/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscript.g.cs
index bf47d68..2213691 100644
--- a/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscript.g.cs
+++ b/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscript.g.cs
@@ -54,7 +54,11 @@ public partial interface IApiEndpointsClient
         /// Example: 9f36ee32-5a2c-47e7-b1a3-94991d3e3ddb
         /// </param>
         /// <param name="compositionId">
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </param>
         /// <param name="format">
@@ -83,7 +87,7 @@ public partial interface IApiEndpointsClient
         global::System.Threading.Tasks.Task<string> ExportTranscriptAsync(
             global::System.Guid projectId,
             global::Descript.ExportTranscriptRequestFormat format,
-            global::System.Guid? compositionId = default,
+            string? compositionId = default,
             global::Descript.ExportTranscriptRequestIncludeSpeakerLabels? includeSpeakerLabels = default,
             bool? includeMarkers = default,
             global::Descript.ExportTranscriptRequestTimecodes? timecodes = default,
diff --git a/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscriptAsBytes.g.cs b/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscriptAsBytes.g.cs
index dd88690..f4ed631 100644
--- a/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscriptAsBytes.g.cs
+++ b/src/libs/Descript/Generated/Descript.IApiEndpointsClient.ExportTranscriptAsBytes.g.cs
@@ -72,7 +72,11 @@ public partial interface IApiEndpointsClient
         /// Example: 9f36ee32-5a2c-47e7-b1a3-94991d3e3ddb
         /// </param>
         /// <param name="compositionId">
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </param>
         /// <param name="format">
@@ -101,7 +105,7 @@ public partial interface IApiEndpointsClient
         global::System.Threading.Tasks.Task<byte[]> ExportTranscriptAsBytesAsync(
             global::System.Guid projectId,
             global::Descript.ExportTranscriptRequestFormat format,
-            global::System.Guid? compositionId = default,
+            string? compositionId = default,
             global::Descript.ExportTranscriptRequestIncludeSpeakerLabels? includeSpeakerLabels = default,
             bool? includeMarkers = default,
             global::Descript.ExportTranscriptRequestTimecodes? timecodes = default,
diff --git a/src/libs/Descript/Generated/Descript.Models.ExportTranscriptRequest.g.cs b/src/libs/Descript/Generated/Descript.Models.ExportTranscriptRequest.g.cs
index c26c89f..5d89419 100644
--- a/src/libs/Descript/Generated/Descript.Models.ExportTranscriptRequest.g.cs
+++ b/src/libs/Descript/Generated/Descript.Models.ExportTranscriptRequest.g.cs
@@ -18,12 +18,16 @@ public sealed partial class ExportTranscriptRequest
         public required global::System.Guid ProjectId { get; set; }
 
         /// <summary>
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </summary>
         /// <example>39677a40-1c43-4c36-8449-46cfbc4de2b5</example>
         [global::System.Text.Json.Serialization.JsonPropertyName("composition_id")]
-        public global::System.Guid? CompositionId { get; set; }
+        public string? CompositionId { get; set; }
 
         /// <summary>
         /// Transcript file format. The response body is the raw transcript file<br/>
@@ -79,7 +83,11 @@ public sealed partial class ExportTranscriptRequest
         /// The `srt` format exports a SubRip subtitle file with timed captions.
         /// </param>
         /// <param name="compositionId">
-        /// The ID of the composition to export. Defaults to the first composition.<br/>
+        /// Composition to export. If omitted, the first composition in the project is used.<br/>
+        /// Accepts any of the following formats:<br/>
+        /// - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)<br/>
+        /// - A 5-character short ID from a Descript URL (e.g. `39677`)<br/>
+        /// - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)<br/>
         /// Example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
         /// </param>
         /// <param name="includeSpeakerLabels">
@@ -103,7 +111,7 @@ public sealed partial class ExportTranscriptRequest
         public ExportTranscriptRequest(
             global::System.Guid projectId,
             global::Descript.ExportTranscriptRequestFormat format,
-            global::System.Guid? compositionId,
+            string? compositionId,
             global::Descript.ExportTranscriptRequestIncludeSpeakerLabels? includeSpeakerLabels,
             bool? includeMarkers,
             global::Descript.ExportTranscriptRequestTimecodes? timecodes)
diff --git a/src/libs/Descript/Generated/Descript.Models.ImportProjectMediaRequestAddCompositionClip.g.cs b/src/libs/Descript/Generated/Descript.Models.ImportProjectMediaRequestAddCompositionClip.g.cs
index e6dd1c3..1972fa7 100644
--- a/src/libs/Descript/Generated/Descript.Models.ImportProjectMediaRequestAddCompositionClip.g.cs
+++ b/src/libs/Descript/Generated/Descript.Models.ImportProjectMediaRequestAddCompositionClip.g.cs
@@ -17,6 +17,17 @@ public sealed partial class ImportProjectMediaRequestAddCompositionClip
         [global::System.Text.Json.Serialization.JsonRequired]
         public required string Media { get; set; }
 
+        /// <summary>
+        /// Mute the track this clip plays on. For a sequence clip, mutes the sequence's own tracks.<br/>
+        /// For any other clip, mutes the composition's script layer, which silences every<br/>
+        /// clip on it — including clips already in the composition. Defaults to false.<br/>
+        /// Default Value: false<br/>
+        /// Example: true
+        /// </summary>
+        /// <example>true</example>
+        [global::System.Text.Json.Serialization.JsonPropertyName("mute")]
+        public bool? Mute { get; set; }
+
         /// <summary>
         /// Additional properties that are not explicitly defined in the schema
         /// </summary>
@@ -30,13 +41,22 @@ public sealed partial class ImportProjectMediaRequestAddCompositionClip
         /// Media reference ID (display name) of the media to add as a clip<br/>
         /// Example: Misc/intro.mp4
         /// </param>
+        /// <param name="mute">
+        /// Mute the track this clip plays on. For a sequence clip, mutes the sequence's own tracks.<br/>
+        /// For any other clip, mutes the composition's script layer, which silences every<br/>
+        /// clip on it — including clips already in the composition. Defaults to false.<br/>
+        /// Default Value: false<br/>
+        /// Example: true
+        /// </param>
 #if NET7_0_OR_GREATER
         [global::System.Diagnostics.CodeAnalysis.SetsRequiredMembers]
 #endif
         public ImportProjectMediaRequestAddCompositionClip(
-            string media)
+            string media,
+            bool? mute)
         {
             this.Media = media ?? throw new global::System.ArgumentNullException(nameof(media));
+            this.Mute = mute;
         }
 
         /// <summary>
diff --git a/src/libs/Descript/Generated/Descript.OptionsSupport.g.cs b/src/libs/Descript/Generated/Descript.OptionsSupport.g.cs
index 36b17b2..9eee49e 100644
--- a/src/libs/Descript/Generated/Descript.OptionsSupport.g.cs
+++ b/src/libs/Descript/Generated/Descript.OptionsSupport.g.cs
@@ -903,11 +903,14 @@ private static void ApplyHeadersCore(
             foreach (var header in headers)
             {
                 request.Headers.Remove(header.Key);
-                request.Content?.Headers.Remove(header.Key);
+                if (request.Headers.TryAddWithoutValidation(header.Key, header.Value ?? string.Empty))
+                {
+                    continue;
+                }
 
-                if (!request.Headers.TryAddWithoutValidation(header.Key, header.Value ?? string.Empty) &&
-                    request.Content != null)
+                if (request.Content != null)
                 {
+                    request.Content.Headers.Remove(header.Key);
                     request.Content.Headers.TryAddWithoutValidation(header.Key, header.Value ?? string.Empty);
                 }
             }
diff --git a/src/libs/Descript/openapi.yaml b/src/libs/Descript/openapi.yaml
index 60b50e9..e61334d 100644
--- a/src/libs/Descript/openapi.yaml
+++ b/src/libs/Descript/openapi.yaml
@@ -487,6 +487,14 @@ paths:
                               type: string
                               description: Media reference ID (display name) of the media to add as a clip
                               example: Misc/intro.mp4
+                            mute:
+                              type: boolean
+                              description: |
+                                Mute the track this clip plays on. For a sequence clip, mutes the sequence's own tracks.
+                                For any other clip, mutes the composition's script layer, which silences every
+                                clip on it — including clips already in the composition. Defaults to false.
+                              default: false
+                              example: true
                           additionalProperties: false
                     required:
                       - clips
@@ -1386,8 +1394,13 @@ paths:
                   example: 9f36ee32-5a2c-47e7-b1a3-94991d3e3ddb
                 composition_id:
                   type: string
-                  format: uuid
-                  description: The ID of the composition to export. Defaults to the first composition.
+                  description: |
+                    Composition to export. If omitted, the first composition in the project is used.
+
+                    Accepts any of the following formats:
+                    - A full composition UUID (e.g. `39677a40-1c43-4c36-8449-46cfbc4de2b5`)
+                    - A 5-character short ID from a Descript URL (e.g. `39677`)
+                    - A full Descript project URL (e.g. `https://web.descript.com/{project_id}/39677`)
                   example: 39677a40-1c43-4c36-8449-46cfbc4de2b5
                 format:
                   type: string