feat(offscreen): read recent proposals into the brief; prompt follows up

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/mode/offscreen/offscreen_test.go

@@ -3,6 +3,7 @@ package offscreen
 import (
 	"context"
 	"errors"
+	"strings"
 	"testing"
 	"time"
 
@@ -211,3 +212,37 @@ func TestDismissRecordsProposalDismissed(t *testing.T) {
 	}
 	_ = waitEvent(t, mem, "proposal_dismissed")
 }
+
+func TestBriefIncludesRecentProposalsWithOutcome(t *testing.T) {
+	mem := memory.NewFake()
+	ctx := context.Background()
+	// at = the test clock (Unix 1000); confirmed walk, dismissed stretch.
+	_ = mem.Record(ctx, memory.Event{Kind: "proposal_made", At: time.Unix(1000, 0),
+		Data: map[string]any{"proposal_id": "w", "next_action": "walk"}})
+	_ = mem.Record(ctx, memory.Event{Kind: "action_taken", At: time.Unix(1000, 0),
+		Data: map[string]any{"proposal_id": "w"}})
+	_ = mem.Record(ctx, memory.Event{Kind: "proposal_made", At: time.Unix(1000, 0),
+		Data: map[string]any{"proposal_id": "s", "next_action": "stretch"}})
+	_ = mem.Record(ctx, memory.Event{Kind: "proposal_dismissed", At: time.Unix(1000, 0),
+		Data: map[string]any{"proposal_id": "s"}})
+
+	m := newTestModeMem(t, &fakeTasks{}, okBackend(), mem)
+	brief := m.assembleBrief()
+
+	if !strings.Contains(brief, "Recently proposed") {
+		t.Fatalf("brief missing history section:\n%s", brief)
+	}
+	if !strings.Contains(brief, "walk") || !strings.Contains(brief, "confirmed") {
+		t.Fatalf("brief missing confirmed walk:\n%s", brief)
+	}
+	if !strings.Contains(brief, "stretch") || !strings.Contains(brief, "dismissed") {
+		t.Fatalf("brief missing dismissed stretch:\n%s", brief)
+	}
+}
+
+func TestBriefOmitsHistoryWhenNoMemory(t *testing.T) {
+	m := newTestMode(t, &fakeTasks{}, okBackend()) // no Memory injected
+	if strings.Contains(m.assembleBrief(), "Recently proposed") {
+		t.Fatal("history section should be absent without memory")
+	}
+}