Retain original task constraints during execution

4 files changed, 8 insertions, 3 deletions

diff --git a/doc/Design.md b/doc/Design.md
index dad6692..5cc1480 100644
--- a/doc/Design.md
+++ b/doc/Design.md
@@ -401,8 +401,9 @@ AgentSession
 6. current TaskGraph / current Task
 7. previous Summary
 8. recent verified Execution Result
-9. current Taskの`requires_external_effect`に基づく実行要件
-10. recent Conversation
+9. original MCP Task request（exact path、引数、制約、literalの参照元）
+10. current Taskの`requires_external_effect`に基づく実行要件
+11. recent Conversation
 
 実行要件は、現在runningのTaskだけを実行してqueued Taskを先取りしないことを指示する。外部効果が必要なTaskでは文章上の宣言、計画、JSON例を実行済みと扱わず、対応するInternal Toolを直ちに呼び出すよう指示する。成功済みのread結果はExecution Resultから再利用し、不要な再読込を避けてwrite/processへ進む。外部効果が不要なTaskにはToolを強制しない。未解決のTool失敗後にToolを呼ばない応答も同一失敗として数え、既定の同一失敗上限でfailedにする。
 ### 9.3 Summary policy
diff --git a/src/Agent.Core/Prompts/PromptComposer.cs b/src/Agent.Core/Prompts/PromptComposer.cs
index de209be..c61e678 100644
--- a/src/Agent.Core/Prompts/PromptComposer.cs
+++ b/src/Agent.Core/Prompts/PromptComposer.cs
@@ -15,6 +15,7 @@ public sealed record PromptContext(
     string PreviousSummary,
     IReadOnlyList<ExecutionResult> ExecutionResults,
     IReadOnlyList<ConversationMessage> Conversation,
+    string OriginalRequest,
     string Request,
     bool RequiresExternalEffect,
     IReadOnlyList<string>? Images = null);
@@ -33,6 +34,7 @@ public static class PromptComposer
             new("system", context.TaskGraphSummary),
             new("system", context.PreviousSummary),
             new("system", ComposeExecutionResults(context.ExecutionResults)),
+            new("system", $"Original MCP Task request (reference for exact paths, arguments, constraints, and literals; perform only the current Running Planner Task):\n{context.OriginalRequest}"),
             new("system", ComposeExecutionRequirement(context.RequiresExternalEffect))
         };
         // Inject selected skill instructions (Progressive Disclosure Stage 3).
diff --git a/src/Agent.Core/Runtime/AgentRuntime.cs b/src/Agent.Core/Runtime/AgentRuntime.cs
index 3722ff3..894f50e 100644
--- a/src/Agent.Core/Runtime/AgentRuntime.cs
+++ b/src/Agent.Core/Runtime/AgentRuntime.cs
@@ -220,6 +220,7 @@ public sealed class AgentRuntime(TaskRegistry registry, IOllamaClient ollama, Ag
             session.Summary ?? string.Empty,
             session.ExecutionResults,
             session.Conversation,
+            task.Request,
             plannerTask.Description,
             plannerTask.RequiresExternalEffect,
             task.Images)).ToList();
diff --git a/tests/Agent.Core.Tests/PromptAndRuntimeTests.cs b/tests/Agent.Core.Tests/PromptAndRuntimeTests.cs
index 910ea2a..acfee81 100644
--- a/tests/Agent.Core.Tests/PromptAndRuntimeTests.cs
+++ b/tests/Agent.Core.Tests/PromptAndRuntimeTests.cs
@@ -22,7 +22,7 @@ public sealed class PromptAndRuntimeTests
             "fixed", "user system", "ja", availableSkills, [], "capability", "graph", "summary",
             [new ExecutionResult(Guid.NewGuid(), "file_read", true, "verified content")],
             [new ConversationMessage("user", "old"), new ConversationMessage("assistant", "reply")],
-            "new request", true, ["image"]));
+            "original request with C:/exact/path", "new request", true, ["image"]));
 
         // Check that the skill catalog (name + description) is present, not the full instructions.
         Assert.Contains(messages, m => m.Content.Contains("test-skill") && m.Content.Contains("A test skill."));
@@ -31,6 +31,7 @@ public sealed class PromptAndRuntimeTests
         Assert.Contains(messages, m => m.Role == "system" && m.Content.Contains("fenced JSON example does not perform", StringComparison.Ordinal));
         Assert.Contains(messages, m => m.Role == "system" && m.Content.Contains("do not perform Queued Tasks", StringComparison.Ordinal));
         Assert.Contains(messages, m => m.Role == "system" && m.Content.Contains("file_read (success): verified content", StringComparison.Ordinal));
+        Assert.Contains(messages, m => m.Role == "system" && m.Content.Contains("original request with C:/exact/path", StringComparison.Ordinal));
         Assert.Equal("system", messages[0].Role);
         Assert.Equal("user", messages[^1].Role);
         Assert.Equal(["image"], messages[^1].Images);