diff --git a/event.go b/event.go
index 6c9e60f..1de87a7 100644
--- a/event.go
+++ b/event.go
@@ -24,38 +24,51 @@ type Event struct {
 }
 
 const (
-	KindProfileMetadata          int = 0
-	KindTextNote                 int = 1
-	KindRecommendServer          int = 2
-	KindContactList              int = 3
-	KindEncryptedDirectMessage   int = 4
-	KindDeletion                 int = 5
-	KindRepost                   int = 6
-	KindReaction                 int = 7
-	KindChannelCreation          int = 40
-	KindChannelMetadata          int = 41
-	KindChannelMessage           int = 42
-	KindChannelHideMessage       int = 43
-	KindChannelMuteUser          int = 44
-	KindFileMetadata             int = 1063
-	KindZapRequest               int = 9734
-	KindZap                      int = 9735
-	KindMuteList                 int = 10000
-	KindPinList                  int = 10001
-	KindRelayListMetadata        int = 10002
-	KindNWCWalletInfo            int = 13194
-	KindClientAuthentication     int = 22242
-	KindNWCWalletRequest         int = 23194
-	KindNWCWalletResponse        int = 23195
-	KindNostrConnect             int = 24133
-	KindCategorizedPeopleList    int = 30000
-	KindCategorizedBookmarksList int = 30001
-	KindProfileBadges            int = 30008
-	KindBadgeDefinition          int = 30009
-	KindStallDefinition          int = 30017
-	KindProductDefinition        int = 30018
-	KindArticle                  int = 30023
-	KindApplicationSpecificData  int = 30078
+	KindProfileMetadata             int = 0
+	KindTextNote                    int = 1
+	KindRecommendServer             int = 2
+	KindContactList                 int = 3
+	KindEncryptedDirectMessage      int = 4
+	KindDeletion                    int = 5
+	KindRepost                      int = 6
+	KindReaction                    int = 7
+	KindSimpleGroupChatMessage      int = 9
+	KindSimpleGroupThread           int = 11
+	KindSimpleGroupReply            int = 12
+	KindChannelCreation             int = 40
+	KindChannelMetadata             int = 41
+	KindChannelMessage              int = 42
+	KindChannelHideMessage          int = 43
+	KindChannelMuteUser             int = 44
+	KindFileMetadata                int = 1063
+	KindSimpleGroupAddUser          int = 9000
+	KindSimpleGroupRemoveUser       int = 9001
+	KindSimpleGroupEditMetadata     int = 9002
+	KindSimpleGroupAddPermission    int = 9003
+	KindSimpleGroupRemovePermission int = 9004
+	KindSimpleGroupDeleteEvent      int = 9005
+	KindSimpleGroupEditGroupStatus  int = 9006
+	KindZapRequest                  int = 9734
+	KindZap                         int = 9735
+	KindMuteList                    int = 10000
+	KindPinList                     int = 10001
+	KindRelayListMetadata           int = 10002
+	KindNWCWalletInfo               int = 13194
+	KindClientAuthentication        int = 22242
+	KindNWCWalletRequest            int = 23194
+	KindNWCWalletResponse           int = 23195
+	KindNostrConnect                int = 24133
+	KindCategorizedPeopleList       int = 30000
+	KindCategorizedBookmarksList    int = 30001
+	KindProfileBadges               int = 30008
+	KindBadgeDefinition             int = 30009
+	KindStallDefinition             int = 30017
+	KindProductDefinition           int = 30018
+	KindArticle                     int = 30023
+	KindApplicationSpecificData     int = 30078
+	KindSimpleGroupMetadata         int = 39000
+	KindSimpleGroupAdmins           int = 39001
+	KindSimpleGroupMembers          int = 39002
 )
 
 // Event Stringer interface, just returns the raw JSON as a string.
diff --git a/nip29/group.go b/nip29/group.go
new file mode 100644
index 0000000..a631436
--- /dev/null
+++ b/nip29/group.go
@@ -0,0 +1,75 @@
+package nip29
+
+import (
+	"fmt"
+
+	"github.com/nbd-wtf/go-nostr"
+)
+
+type Group struct {
+	ID      string
+	Name    string
+	Picture string
+	About   string
+	Members map[string]*Role
+	Private bool
+	Closed  bool
+}
+
+func (group Group) MetadataEvent() *nostr.Event {
+	evt := &nostr.Event{
+		Kind:      39000,
+		CreatedAt: nostr.Now(),
+		Content:   group.About,
+		Tags: nostr.Tags{
+			nostr.Tag{"d", group.ID},
+		},
+	}
+	if group.Name != "" {
+		evt.Tags = append(evt.Tags, nostr.Tag{"name", group.Name})
+	}
+	if group.About != "" {
+		evt.Tags = append(evt.Tags, nostr.Tag{"about", group.Name})
+	}
+	if group.Picture != "" {
+		evt.Tags = append(evt.Tags, nostr.Tag{"picture", group.Picture})
+	}
+
+	// status
+	if group.Private {
+		evt.Tags = append(evt.Tags, nostr.Tag{"private"})
+	} else {
+		evt.Tags = append(evt.Tags, nostr.Tag{"public"})
+	}
+	if group.Closed {
+		evt.Tags = append(evt.Tags, nostr.Tag{"closed"})
+	} else {
+		evt.Tags = append(evt.Tags, nostr.Tag{"open"})
+	}
+
+	return evt
+}
+
+func MetadataEventToGroup(evt *nostr.Event) (*Group, error) {
+	if evt.Kind != nostr.KindSimpleGroupMetadata {
+		return nil, fmt.Errorf("expected kind %d, got %d", nostr.KindSimpleGroupMetadata, evt.Kind)
+	}
+
+	group := &Group{}
+	group.ID = evt.Tags.GetD()
+
+    if tag := nostr.Tags.GetFirst([]string{"name", ""}); tag != nil {
+    group.Name = (*tag)[1]
+    }
+    if tag := nostr.Tags.GetFirst([]string{"about", ""}); tag != nil {
+    group.About = (*tag)[1]
+    }
+    if tag := nostr.Tags.GetFirst([]string{"picture", ""}); tag != nil {
+    group.Picture = (*tag)[1]
+    }
+
+
+	Members map[string]*Role
+	Private bool
+	Closed  bool
+}
diff --git a/nip29/nip29.go b/nip29/nip29.go
new file mode 100644
index 0000000..48a9dc2
--- /dev/null
+++ b/nip29/nip29.go
@@ -0,0 +1,46 @@
+package nip29
+
+import (
+	"github.com/nbd-wtf/go-nostr"
+	"golang.org/x/exp/slices"
+)
+
+type Role struct {
+	Name        string
+	Permissions map[Permission]struct{}
+}
+
+type Permission = string
+
+const (
+	PermAddUser          Permission = "add-user"
+	PermEditMetadata     Permission = "edit-metadata"
+	PermDeleteEvent      Permission = "delete-event"
+	PermRemoveUser       Permission = "remove-user"
+	PermAddPermission    Permission = "add-permission"
+	PermRemovePermission Permission = "remove-permission"
+	PermEditGroupStatus  Permission = "edit-group-status"
+)
+
+type KindRange []int
+
+var ModerationEventKinds = KindRange{
+	nostr.KindSimpleGroupAddUser,
+	nostr.KindSimpleGroupRemoveUser,
+	nostr.KindSimpleGroupEditMetadata,
+	nostr.KindSimpleGroupAddPermission,
+	nostr.KindSimpleGroupRemovePermission,
+	nostr.KindSimpleGroupDeleteEvent,
+	nostr.KindSimpleGroupEditGroupStatus,
+}
+
+var MetadataEventKinds = KindRange{
+	nostr.KindSimpleGroupMetadata,
+	nostr.KindSimpleGroupAdmins,
+	nostr.KindSimpleGroupMembers,
+}
+
+func (kr KindRange) Includes(kind int) bool {
+	_, ok := slices.BinarySearch(kr, kind)
+	return ok
+}