GEN2-027: prepare controlled production canary

cmd/core-runtime/main.go

@@ -533,7 +533,7 @@ func main() {
 			log.Printf("interaction principal history loaded: %d utterances", len(recentUserHistory))
 		}
 		conversationHistory = append(conversationHistory, recentUserHistory...)
-		gen2Context := interactiondomain.BuildGen2Context(conversationHistory)
+		gen2Context := interactiondomain.BuildScopedGen2Context(conversationHistory, string(session.PrincipalID))
 		if !creativeUserRequest && locationReply == "" {
 			if continuation := interactiondomain.ContinueLocalSearch(effectiveTaskMessage, conversationHistory); continuation != "" {
 				continuationMessage = continuation

dev/ACTIVE_TASK.json

@@ -1 +1 @@
-{"task_file":"dev/tasks/GEN2-025-multimodal-and-ambient-ingress-readiness-without-implementing-the-whole-.json","task_id":"GEN2-025","task_revision":1}
+{"task_file":"dev/tasks/GEN2-027-production-canary-and-controlled-gen2-traffic-transition.json","task_id":"GEN2-027","task_revision":1}

modules/interaction/domain/gen2_context.go

@@ -11,6 +11,23 @@ type ContextProjection struct {
 // BuildGen2Context is a read-side projection over canonical utterance history.
 // PersonalMemory remains a compatibility fallback and is never written here.
 func BuildGen2Context(history []interaction.HumanUtterance) ContextProjection {
+	return BuildScopedGen2Context(history, "")
+}
+
+// BuildScopedGen2Context is the Gen2 retrieval boundary for household
+// context. The caller supplies already-authorized history; this defensive
+// filter prevents accidental cross-principal projection when a mixed source
+// is passed during degraded operation.
+func BuildScopedGen2Context(history []interaction.HumanUtterance, principalID string) ContextProjection {
+	if principalID != "" {
+		scoped := make([]interaction.HumanUtterance, 0, len(history))
+		for _, item := range history {
+			if item.PrincipalID == "" || string(item.PrincipalID) == principalID {
+				scoped = append(scoped, item)
+			}
+		}
+		history = scoped
+	}
 	text := CompilePersonalMemory(history).ContextText()
 	if text != "" {
 		return ContextProjection{Text: text, Source: "retrieval:interaction-utterances"}

modules/interaction/domain/gen2_context_test.go

@@ -3,6 +3,7 @@ package domain_test
 import (
 	"git.cin.su/m/Assistant/contracts/interaction"
 	"git.cin.su/m/Assistant/modules/interaction/domain"
+	"strings"
 	"testing"
 )
 
@@ -16,3 +17,13 @@ func TestGen2ContextUsesRetrievalProjectionAndKeepsV1Fallback(t *testing.T) {
 		t.Fatalf("fallback missing: %#v", empty)
 	}
 }
+
+func TestGen2ContextDoesNotProjectAnotherPrincipal(t *testing.T) {
+	got := domain.BuildScopedGen2Context([]interaction.HumanUtterance{
+		{ID: "mine", PrincipalID: "principal-1", Content: "Я сейчас в Москве", ReceivedAtUnixMillis: 2},
+		{ID: "other", PrincipalID: "principal-2", Content: "Я сейчас в Казани", ReceivedAtUnixMillis: 3},
+	}, "principal-1")
+	if got.Text == "" || strings.Contains(got.Text, "Казани") || !strings.Contains(got.Text, "Москве") {
+		t.Fatalf("scoped context=%#v", got)
+	}
+}