From b07b41cd435991cd254957af79055080c85b346e Mon Sep 17 00:00:00 2001 From: tanaka takashi Date: Sun, 9 Aug 2026 21:08:20 +0900 Subject: feat: AI Agent Sandbox MCP Server v1を実装 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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。 --- src/Agent.Core/Tools/ToolUseGuard.cs | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 src/Agent.Core/Tools/ToolUseGuard.cs (limited to 'src/Agent.Core/Tools/ToolUseGuard.cs') diff --git a/src/Agent.Core/Tools/ToolUseGuard.cs b/src/Agent.Core/Tools/ToolUseGuard.cs new file mode 100644 index 0000000..633d34c --- /dev/null +++ b/src/Agent.Core/Tools/ToolUseGuard.cs @@ -0,0 +1,22 @@ +namespace Agent.Core.Tools; + +public enum ToolUseGuardDecision { Complete, Retry, Fail } + +public sealed record ToolUseGuardResult(ToolUseGuardDecision Decision, string Observation, int IdenticalFailureCount); + +public sealed class ToolUseGuard(int sameFailureLimit = 5) +{ + private readonly Dictionary _failures = new(StringComparer.Ordinal); + public int SameFailureLimit { get; } = sameFailureLimit > 0 ? sameFailureLimit : throw new ArgumentOutOfRangeException(nameof(sameFailureLimit)); + + public ToolUseGuardResult Evaluate(bool requiresExternalEffect, bool hadToolCall, bool hasExternalEffectEvidence, string? failureFingerprint = null) + { + if (!requiresExternalEffect) return new(ToolUseGuardDecision.Complete, string.Empty, 0); + if (hasExternalEffectEvidence) return new(ToolUseGuardDecision.Complete, string.Empty, 0); + string fingerprint = string.IsNullOrWhiteSpace(failureFingerprint) ? "missing-external-effect" : failureFingerprint; + int count = _failures.TryGetValue(fingerprint, out int prior) ? prior + 1 : 1; + _failures[fingerprint] = count; + if (count >= SameFailureLimit) return new(ToolUseGuardDecision.Fail, "Required external effect was not completed after repeated identical failures.", count); + return new(ToolUseGuardDecision.Retry, "No verified external effect occurred; perform the required operation using an internal tool.", count); + } +} -- cgit v1.2.3