feat: add backend plan mode checkpoints

Add backend support for plan-mode turn shaping and exit-plan review checkpoints. Run-turn commands now accept an interaction mode, plan-mode prompt guidance tells agents to produce a plan and call exit_plan_mode, and the sidecar emits a structured exit-plan-mode-requested event when the SDK raises that session event. For now the backend intentionally treats exit_plan_mode as a turn boundary and graceful-degradation review checkpoint. The current Agent Framework GitHubCopilotAgent wrapper does not expose a clean way to bridge the live CopilotSession back into same-turn exit-plan resolution, so that follow-up remains documented for the frontend and a future backend slice. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-08-29 22:17:13 +02:00 · 2026-03-26 23:29:32 +01:00
parent c069b86add
commit 380e402512
11 changed files with 422 additions and 54 deletions
@@ -0,0 +1,72 @@
+using Aryx.AgentHost.Contracts;
+using Aryx.AgentHost.Services;
+using GitHub.Copilot.SDK;
+
+namespace Aryx.AgentHost.Tests;
+
+public sealed class CopilotExitPlanModeCoordinatorTests
+{
+    [Fact]
+    public void RecordExitPlanModeRequest_BuildsEventAndMakesItConsumable()
+    {
+        CopilotExitPlanModeCoordinator coordinator = new();
+        RunTurnCommandDto command = CreateCommand();
+
+        ExitPlanModeRequestedEventDto exitPlanEvent = coordinator.RecordExitPlanModeRequest(
+            command,
+            command.Pattern.Agents[0],
+            new ExitPlanModeRequestedEvent
+            {
+                Data = new ExitPlanModeRequestedData
+                {
+                    RequestId = "exit-plan-1",
+                    Summary = "Proposed plan",
+                    PlanContent = "1. Investigate\n2. Implement",
+                    Actions = ["interactive", "autopilot"],
+                    RecommendedAction = "interactive",
+                },
+            });
+
+        Assert.Equal("exit-plan-mode-requested", exitPlanEvent.Type);
+        Assert.Equal("turn-1", exitPlanEvent.RequestId);
+        Assert.Equal("session-1", exitPlanEvent.SessionId);
+        Assert.Equal("exit-plan-1", exitPlanEvent.ExitPlanId);
+        Assert.Equal("agent-1", exitPlanEvent.AgentId);
+        Assert.Equal("Primary", exitPlanEvent.AgentName);
+        Assert.Equal("Proposed plan", exitPlanEvent.Summary);
+        Assert.Equal("1. Investigate\n2. Implement", exitPlanEvent.PlanContent);
+        Assert.Equal(["interactive", "autopilot"], exitPlanEvent.Actions);
+        Assert.Equal("interactive", exitPlanEvent.RecommendedAction);
+
+        ExitPlanModeRequestedEventDto? consumed = coordinator.ConsumePendingRequest(command.RequestId);
+        Assert.NotNull(consumed);
+        Assert.Equal("exit-plan-1", consumed!.ExitPlanId);
+        Assert.Null(coordinator.ConsumePendingRequest(command.RequestId));
+    }
+
+    private static RunTurnCommandDto CreateCommand()
+    {
+        return new RunTurnCommandDto
+        {
+            RequestId = "turn-1",
+            SessionId = "session-1",
+            Pattern = new PatternDefinitionDto
+            {
+                Id = "pattern-1",
+                Name = "Plan Mode Pattern",
+                Mode = "single",
+                Availability = "available",
+                Agents =
+                [
+                    new PatternAgentDefinitionDto
+                    {
+                        Id = "agent-1",
+                        Name = "Primary",
+                        Model = "gpt-5.4",
+                        Instructions = "Help with the request.",
+                    },
+                ],
+            },
+        };
+    }
+}