feat: AI Agent Sandbox MCP Server v1を実装

Specifications、Design、ImplementationPlanの優先順位を整理し、単一Task実行モデル、typed option優先、設定可能なresource上限、local Ollamaを必須とするRelease Gateを文書化。

.NET 10/C# 14の5 production project、3 test project、E2E Clientを構築。typed YAML、en/ja locale、fixed/user prompt、stdioおよびloopback限定Streamable HTTP、agent_run/agent_status、Session、Ollama text/tool/Vision、TaskGraphとtoken accountingを実装。

Windows sandboxとしてfixed AppContainer、canonical/reparse検査、能力別ACL、path+SHA-256 executable approval、child-process restriction、Job Object、task journal、atomic file transaction、crash recoveryを実装。WFPのIPv4/IPv6 default denyとexact allow、dynamic session、temporary loopback exemption、管理者/BFE診断を追加。

Security/Recovery test、MCP/Ollama integration test、stdio/HTTP Operational E2E、Release Bundle生成・checksum・manifest・fresh extraction検査を追加。Requirement TraceabilityとPhase 0〜11の進捗、初回セットアップ可能なREADMEを整備。

Debug/Release/publish/objをrepository rootのbuild/へ集約し、旧project-local bin/objへの依存を除去。artifacts/とbuild/をGit管理外に設定し、clean checkoutでもsolution buildからE2E Clientまで生成可能にした。

1 files changed, 36 insertions, 0 deletions

diff --git a/src/Agent.Core/Prompts/PromptComposer.cs b/src/Agent.Core/Prompts/PromptComposer.cs
new file mode 100644
index 0000000..e07c7e8
--- /dev/null
+++ b/src/Agent.Core/Prompts/PromptComposer.cs
@@ -0,0 +1,36 @@
+using Agent.Core.Ollama;
+using Agent.Core.Sessions;
+
+namespace Agent.Core.Prompts;
+
+public sealed record PromptContext(
+    string FixedSystemPrompt,
+    string UserSystemPrompt,
+    string Locale,
+    IReadOnlyList<string> Skills,
+    string SandboxCapabilitySummary,
+    string TaskGraphSummary,
+    string PreviousSummary,
+    IReadOnlyList<ConversationMessage> Conversation,
+    string Request,
+    IReadOnlyList<string>? Images = null);
+
+public static class PromptComposer
+{
+    public static IReadOnlyList<OllamaMessage> Compose(PromptContext context)
+    {
+        var messages = new List<OllamaMessage>
+        {
+            new("system", context.FixedSystemPrompt),
+            new("system", context.UserSystemPrompt),
+            new("system", $"Respond in locale: {context.Locale}."),
+            new("system", string.Join("\n\n", context.Skills)),
+            new("system", context.SandboxCapabilitySummary),
+            new("system", context.TaskGraphSummary),
+            new("system", context.PreviousSummary)
+        };
+        messages.AddRange(context.Conversation.Select(static item => new OllamaMessage(item.Role, item.Content)));
+        messages.Add(new OllamaMessage("user", context.Request, context.Images));
+        return messages;
+    }
+}