diff --git a/pkg/agentic/alias_test.go b/pkg/agentic/alias_test.go
new file mode 100644
index 0000000..c094bad
--- /dev/null
+++ b/pkg/agentic/alias_test.go
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: EUPL-1.2
+
+package agentic
+
+import "testing"
+
+func TestAlias_AgentPlan_Good(t *testing.T) {
+	var plan AgentPlan
+	plan.Title = "AX follow-up"
+	plan.Status = "draft"
+
+	if plan.Title != "AX follow-up" {
+		t.Fatalf("expected AgentPlan alias to behave like Plan")
+	}
+	if plan.Status != "draft" {
+		t.Fatalf("expected AgentPlan alias to behave like Plan")
+	}
+}
+
+func TestAlias_AgentSession_Good(t *testing.T) {
+	var session AgentSession
+	session.SessionID = "ses-123"
+	session.AgentType = "codex"
+
+	if session.SessionID != "ses-123" {
+		t.Fatalf("expected AgentSession alias to behave like Session")
+	}
+	if session.AgentType != "codex" {
+		t.Fatalf("expected AgentSession alias to behave like Session")
+	}
+}
diff --git a/pkg/agentic/plan.go b/pkg/agentic/plan.go
index 6cea91b..78812ea 100644
--- a/pkg/agentic/plan.go
+++ b/pkg/agentic/plan.go
@@ -31,6 +31,9 @@ type Plan struct {
 	ArchivedAt      time.Time           `json:"archived_at,omitempty"`
 }
 
+// AgentPlan is the RFC-named alias for Plan.
+type AgentPlan = Plan
+
 // phase := agentic.Phase{Number: 1, Name: "Migrate strings", Status: "in_progress"}
 type Phase struct {
 	Number       int               `json:"number"`
diff --git a/pkg/agentic/session.go b/pkg/agentic/session.go
index 55d9f1e..daa3774 100644
--- a/pkg/agentic/session.go
+++ b/pkg/agentic/session.go
@@ -28,6 +28,9 @@ type Session struct {
 	EndedAt        string           `json:"ended_at,omitempty"`
 }
 
+// AgentSession is the RFC-named alias for Session.
+type AgentSession = Session
+
 // input := agentic.SessionStartInput{AgentType: "codex", PlanSlug: "ax-follow-up"}
 type SessionStartInput struct {
 	PlanSlug  string         `json:"plan_slug,omitempty"`
diff --git a/pkg/brain/alias_test.go b/pkg/brain/alias_test.go
new file mode 100644
index 0000000..7112961
--- /dev/null
+++ b/pkg/brain/alias_test.go
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: EUPL-1.2
+
+package brain
+
+import "testing"
+
+func TestAlias_BrainMemory_Good(t *testing.T) {
+	var memory BrainMemory
+	memory.ID = "mem-123"
+	memory.Type = "convention"
+
+	if memory.ID != "mem-123" {
+		t.Fatalf("expected BrainMemory alias to behave like Memory")
+	}
+	if memory.Type != "convention" {
+		t.Fatalf("expected BrainMemory alias to behave like Memory")
+	}
+}
diff --git a/pkg/brain/tools.go b/pkg/brain/tools.go
index 3393ec3..9735d5a 100644
--- a/pkg/brain/tools.go
+++ b/pkg/brain/tools.go
@@ -86,6 +86,9 @@ type Memory struct {
 	UpdatedAt    string   `json:"updated_at"`
 }
 
+// BrainMemory is the RFC-named alias for Memory.
+type BrainMemory = Memory
+
 //	input := brain.ForgetInput{
 //	    ID:     "mem_123",
 //	    Reason: "superseded",