modules/claude-licence-manager/cmd/claude-licence-manager/manager.go

@@ -384,9 +384,10 @@ func (m *Manager) adoptOne(ctx context.Context, c Candidate, reports []Holdings,
 	}
 	now := m.Now().UnixMilli()
 	l := Licence{Name: NameFor(c.Identity), Kind: "subscription", AccountUUID: c.Identity.AccountUUID,
-		Email: c.Identity.EmailAddress, OrganizationUUID: c.Identity.OrganizationUUID}
+		Email: c.Identity.EmailAddress, OrganizationUUID: c.Identity.OrganizationUUID, AdoptedFrom: c.Node}
 	if held != nil {
-		l.Name, l.NotifiedAt, l.Generation = held.Name, held.NotifiedAt, held.Generation
+		// A newer login keeps what the key holds beside its grant: its latest reading (§2, §24).
+		l.Name, l.NotifiedAt, l.Generation, l.Usage = held.Name, held.NotifiedAt, held.Generation, held.Usage
 		if l.Email == "" {
 			l.Email = held.Email
 		}
@@ -898,9 +899,9 @@ func (m *Manager) adoptKey(ctx context.Context, name, key, from string) (map[str
 		_ = m.Emit("licence.refused", map[string]any{"licence": name, "from": from, "reason": why})
 		return nil, fmt.Errorf("%s is refused: %s", name, why)
 	}
-	l := Licence{Name: name, Kind: "api-key", AdoptedAt: m.Now().UnixMilli()}
+	l := Licence{Name: name, Kind: "api-key", AdoptedAt: m.Now().UnixMilli(), AdoptedFrom: from}
 	if held != nil {
-		l.Generation = held.Generation
+		l.Generation, l.Usage = held.Generation, held.Usage
 	}
 	if err := m.handOver(ctx, &l, key, key); err != nil {
 		return nil, err

modules/claude-licence-manager/cmd/claude-licence-manager/manager_test.go

@@ -231,6 +231,12 @@ func TestANewerLoginReplacesTheGrantHeldAndAnOlderOneDoesNot(t *testing.T) {
 	ctx := context.Background()
 	_, _ = mm.m.Consider(ctx, []Holdings{mm.login("laptop", "rt-a", true, t0.Add(-time.Minute))})
 	before, _ := mm.store.Licence(ctx, licence1)
+	// §2: a licence says where it was adopted from, and a newer login keeps the latest reading the key holds.
+	pct := 42.0
+	before.Usage = &UsageReading{SessionPct: &pct, ReadAt: t0.Format(time.RFC3339Nano)}
+	if before.AdoptedFrom != "laptop" || mm.store.SaveLicence(ctx, *before) != nil {
+		t.Fatalf("the adopted licence is %+v", before)
+	}
 	_, _ = mm.m.Consider(ctx, []Holdings{mm.login("server", "rt-old", true, t0.Add(-24*time.Hour))})
 	if strings.Join(mm.vendor.exchanged, ",") != "rt-a" {
 		t.Fatalf("an older login was exchanged: %v", mm.vendor.exchanged)
@@ -241,6 +247,9 @@ func TestANewerLoginReplacesTheGrantHeldAndAnOlderOneDoesNot(t *testing.T) {
 	if after.RefreshFingerprint == before.RefreshFingerprint || mm.vendor.exchanged[len(mm.vendor.exchanged)-1] != "rt-new" {
 		t.Fatalf("a newer login did not win: %v", mm.vendor.exchanged)
 	}
+	if after.AdoptedFrom != "desktop" || after.Usage == nil || after.Usage.SessionPct == nil || *after.Usage.SessionPct != 42 {
+		t.Fatalf("after a newer login the licence is %+v", after)
+	}
 	if ls, _ := mm.store.Licences(ctx); len(ls) != 1 {
 		t.Fatalf("one account became %d licences", len(ls))
 	}