Switch to Sonnet 5.5 and use Message Batches API

.github/workflows/collect-prs.yml

@@ -16,11 +16,11 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
-    timeout-minutes: 20
+    timeout-minutes: 70 # Message Batches: up to 40 min wait (Program.cs) + one-by-one fallback
     outputs:
       has_changes: ${{ steps.commit.outputs.has_changes }}
     steps:
-    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
     - name: Setup .NET
       uses: prozolic/Actions/.github/actions/setup-dotnet@main
       with:
@@ -48,7 +48,7 @@ jobs:
           echo "has_changes=true" >> "$GITHUB_OUTPUT"
         fi
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
+      uses: actions/upload-pages-artifact@fc324d3547104276b827a68afc52ff2a11cc49c9 # v5.0.0
       with:
         path: ./outputs/
 
@@ -65,7 +65,7 @@ jobs:
     steps:
       - name: Deploy
         id: deployment
-        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0
+        uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0
 
   # NOTE: push with GITHUB_TOKEN won't invoke the event,
   #       as a workaround, directly call the action.

README.md

@@ -14,7 +14,11 @@ The application runs automatically via GitHub Actions every day at midnight (UTC
 
 ## AI Model
 
-Claude Haiku 4.5
+Claude Sonnet 5.5
+
+### Previous models
+
+- Claude Haiku 4.5: used from December 21, 2025 to October 8, 2026
 
 ## Development
 
@@ -44,7 +48,7 @@ https://prozolic.github.io/PRDigest.NET/feed.xml
 
 #### Markdig
 
-- Version: 1.2.0
+- Version: 1.4.0
 - URL: https://github.com/xoofx/markdig
 - Copyright (c) 2018-2019, Alexandre Mutel
 - Licensed under the [BSD 2-Clause License](https://github.com/xoofx/markdig/blob/main/license.txt)
@@ -58,7 +62,7 @@ https://prozolic.github.io/PRDigest.NET/feed.xml
 
 #### Anthropic SDK for C\#
 
-- Version: 12.23.0
+- Version: 12.54.1
 - URL: https://github.com/anthropics/anthropic-sdk-csharp
 - Copyright 2023 Anthropic, PBC.
 - Licensed under the [MIT License](https://github.com/anthropics/anthropic-sdk-csharp/blob/main/LICENSE)

src/PRDigest.NET/Constants.cs

@@ -1,9 +1,24 @@
-
+using Anthropic.Models.Messages;
+
 namespace PRDigest.NET;
 
 internal static class Constants
 {
     public const string Owner = "dotnet";
     public const string Repository = "runtime";
     public const string FullRepository = $"{Owner}/{Repository}";
+
+    public const Model SummaryModel = Model.ClaudeSonnet5_5; // Claude Sonnet 5.5
+
+    // Summarization settings shared by the Messages API and the Message Batches API.
+    // Thinking is turned off with "between_tools" (Sonnet 5.5 rejects "disabled"), so max_tokens covers only the summary.
+    // The prompt caps the summary at 1000 characters; 1024 tokens cut off about 4% of Haiku 4.5 summaries mid-sentence.
+    public const int SummaryMaxTokens = 2048;
+
+    // Shown instead of the summary when Claude declines to summarize a PR. It keeps the 概要 heading so that the
+    // monthly page and the RSS feed, which read only that section, show it too.
+    public const string RefusedSummary = """
+    #### 概要
+    この Pull Request は、安全性に関する判定により要約を生成できませんでした。変更内容は元の Pull Request を参照してください。
+    """;
 }

src/PRDigest.NET/PRDigest.NET.csproj

@@ -9,9 +9,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Markdig" Version="1.3.2" />
+    <PackageReference Include="Markdig" Version="1.4.0" />
     <PackageReference Include="Octokit" Version="14.0.0" />
-    <PackageReference Include="Anthropic" Version="12.44.0" />
+    <PackageReference Include="Anthropic" Version="12.54.1" />
   </ItemGroup>
 
 </Project>