feat(brain): surface deleted_at in memory outputs

Co-Authored-By: Virgil <virgil@lethean.io>

pkg/agentic/commands.go

@@ -547,6 +547,9 @@ func (s *PrepSubsystem) cmdBrainList(options core.Options) core.Result {
 		if memory.SupersedesCount > 0 {
 			core.Print(nil, "    supersedes: %d", memory.SupersedesCount)
 		}
+		if memory.DeletedAt != "" {
+			core.Print(nil, "    deleted_at: %s", memory.DeletedAt)
+		}
 		if memory.Content != "" {
 			core.Print(nil, "    %s", memory.Content)
 		}
@@ -698,6 +701,7 @@ type brainRecallMemory struct {
 	Project    string   `json:"project"`
 	AgentID    string   `json:"agent_id"`
 	Confidence float64  `json:"confidence"`
+	DeletedAt  string   `json:"deleted_at,omitempty"`
 	Tags       []string `json:"tags"`
 }
 
@@ -1134,6 +1138,7 @@ type brainListOutputEntry struct {
 	AgentID         string   `json:"agent_id"`
 	Confidence      float64  `json:"confidence"`
 	SupersedesCount int      `json:"supersedes_count,omitempty"`
+	DeletedAt       string   `json:"deleted_at,omitempty"`
 	Tags            []string `json:"tags"`
 }
 
@@ -1178,6 +1183,7 @@ func brainListOutputFromPayload(payload map[string]any) brainListOutput {
 			case int:
 				entry.SupersedesCount = supersedesCount
 			}
+			entry.DeletedAt = brainListStringValue(entryMap["deleted_at"])
 			if tags, ok := entryMap["tags"].([]any); ok {
 				for _, tag := range tags {
 					entry.Tags = append(entry.Tags, brainListStringValue(tag))

pkg/agentic/commands_test.go

@@ -254,6 +254,7 @@ func TestCommands_CmdBrainList_Good(t *testing.T) {
 					"agent_id":         "virgil",
 					"confidence":       0.9,
 					"supersedes_count": 3,
+					"deleted_at":       "2026-03-31T12:30:00Z",
 					"tags":             []any{"architecture", "convention"},
 				},
 			},
@@ -272,6 +273,7 @@ func TestCommands_CmdBrainList_Good(t *testing.T) {
 	assert.Contains(t, output, "count: 1")
 	assert.Contains(t, output, "mem-1 architecture")
 	assert.Contains(t, output, "supersedes: 3")
+	assert.Contains(t, output, "deleted_at: 2026-03-31T12:30:00Z")
 	assert.Contains(t, output, "Use named actions.")
 }
 

pkg/brain/direct.go

@@ -258,6 +258,7 @@ func memoriesFromPayload(payload map[string]any) []Memory {
 				CreatedAt: stringField(memoryMap, "created_at"),
 				UpdatedAt: stringField(memoryMap, "updated_at"),
 				ExpiresAt: stringField(memoryMap, "expires_at"),
+				DeletedAt: stringField(memoryMap, "deleted_at"),
 			}
 			if id, ok := memoryMap["id"].(string); ok {
 				memory.ID = id

pkg/brain/direct_test.go

@@ -429,6 +429,7 @@ func TestDirect_List_Good_WithMemories(t *testing.T) {
 						"agent_id":         "codex",
 						"confidence":       0.73,
 						"supersedes_count": 2,
+						"deleted_at":       "2026-03-31T12:30:00Z",
 						"tags":             []any{"queue", "review"},
 						"updated_at":       "2026-03-30T10:00:00Z",
 						"created_at":       "2026-03-30T09:00:00Z",
@@ -469,6 +470,7 @@ func TestDirect_List_Good_WithMemories(t *testing.T) {
 	assert.Equal(t, "manual", out.Memories[0].Source)
 	assert.Equal(t, "2026-03-30T10:00:00Z", out.Memories[0].UpdatedAt)
 	assert.Equal(t, "2026-04-01T00:00:00Z", out.Memories[0].ExpiresAt)
+	assert.Equal(t, "2026-03-31T12:30:00Z", out.Memories[0].DeletedAt)
 	assert.Contains(t, out.Memories[0].Tags, "queue")
 	assert.Contains(t, out.Memories[0].Tags, "source:manual")
 

pkg/brain/tools.go

@@ -83,6 +83,7 @@ type Memory struct {
 	SupersedesID    string   `json:"supersedes_id,omitempty"`
 	SupersedesCount int      `json:"supersedes_count,omitempty"`
 	ExpiresAt       string   `json:"expires_at,omitempty"`
+	DeletedAt       string   `json:"deleted_at,omitempty"`
 	CreatedAt       string   `json:"created_at"`
 	UpdatedAt       string   `json:"updated_at"`
 }

pkg/brain/tools_test.go

@@ -23,3 +23,9 @@ func TestTools_RecallInput_Good(t *testing.T) {
 	input := RecallInput{Query: "error handling", TopK: 10}
 	assert.Equal(t, 10, input.TopK)
 }
+
+func TestTools_Memory_Good(t *testing.T) {
+	memory := Memory{DeletedAt: "2026-04-01T00:00:00Z"}
+
+	assert.Equal(t, "2026-04-01T00:00:00Z", memory.DeletedAt)
+}