feat(api): add participant registry RPCs for Stage 7.1

Expose Get/Batch/List/GetMy participant reads and authenticated agent RegisterSelfProfile, SyncMyTopicMemberships, and avatar self-management. Co-authored-by: Cursor <cursoragent@cursor.com>
2026-08-10 13:48:58 +03:00 · 2026-08-10 13:48:58 +03:00 · a50cd3a886
commit a50cd3a886
parent 32d924f965
3 changed files with 1329 additions and 64 deletions
--- a/chat.pb.go
+++ b/chat.pb.go
@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.36.8
-// 	protoc        (unknown)
+// 	protoc        v7.35.1
 // source: chat.proto

 package l_ai_chat_proto
@ -1229,6 +1229,698 @@ func (x *AcknowledgeResponse) GetLastAckSequence() int64 {
 	return 0
 }

+// Participant is the public presentation of a chat identity.
+// Internal platform IDs (telegram_id, discord_id, email, OAuth subject,
+// global_user_id) are NEVER exposed here.
+type Participant struct {
+	state       protoimpl.MessageState `protogen:"open.v1"`
+	AuthorId    string                 `protobuf:"bytes,1,opt,name=author_id,json=authorId,proto3" json:"author_id,omitempty"` // canonical UUID
+	AuthorType  AuthorType             `protobuf:"varint,2,opt,name=author_type,json=authorType,proto3,enum=chat.AuthorType" json:"author_type,omitempty"`
+	DisplayName string                 `protobuf:"bytes,3,opt,name=display_name,json=displayName,proto3" json:"display_name,omitempty"` // may be empty for stubs
+	// Locale key → localized alias (e.g. "ru" → "Мира"). Not unique.
+	Aliases         map[string]string      `protobuf:"bytes,4,rep,name=aliases,proto3" json:"aliases,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Role            string                 `protobuf:"bytes,5,opt,name=role,proto3" json:"role,omitempty"` // e.g. "Coordinator"; may be empty
+	Bio             string                 `protobuf:"bytes,6,opt,name=bio,proto3" json:"bio,omitempty"`
+	StatusText      string                 `protobuf:"bytes,7,opt,name=status_text,json=statusText,proto3" json:"status_text,omitempty"` // participant-owned; distinct from presence
+	AvatarHash      string                 `protobuf:"bytes,8,opt,name=avatar_hash,json=avatarHash,proto3" json:"avatar_hash,omitempty"` // empty when no avatar; used for ETag / skip-upload
+	Online          bool                   `protobuf:"varint,9,opt,name=online,proto3" json:"online,omitempty"`                          // server-owned global ONLINE/OFFLINE
+	LastSeenAt      *timestamppb.Timestamp `protobuf:"bytes,10,opt,name=last_seen_at,json=lastSeenAt,proto3" json:"last_seen_at,omitempty"`
+	ProfileVersion  int64                  `protobuf:"varint,11,opt,name=profile_version,json=profileVersion,proto3" json:"profile_version,omitempty"`    // monotonic; bumps on profile/avatar changes
+	PresenceVersion int64                  `protobuf:"varint,12,opt,name=presence_version,json=presenceVersion,proto3" json:"presence_version,omitempty"` // monotonic; bumps on ONLINE/OFFLINE transitions
+	// Logical agent id (e.g. "coordinator") — set only for AUTHOR_TYPE_AGENT.
+	AgentId       string                 `protobuf:"bytes,13,opt,name=agent_id,json=agentId,proto3" json:"agent_id,omitempty"`
+	CreatedAt     *timestamppb.Timestamp `protobuf:"bytes,14,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+	UpdatedAt     *timestamppb.Timestamp `protobuf:"bytes,15,opt,name=updated_at,json=updatedAt,proto3" json:"updated_at,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Participant) Reset() {
+	*x = Participant{}
+	mi := &file_chat_proto_msgTypes[17]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Participant) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Participant) ProtoMessage() {}
+
+func (x *Participant) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[17]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Participant.ProtoReflect.Descriptor instead.
+func (*Participant) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{17}
+}
+
+func (x *Participant) GetAuthorId() string {
+	if x != nil {
+		return x.AuthorId
+	}
+	return ""
+}
+
+func (x *Participant) GetAuthorType() AuthorType {
+	if x != nil {
+		return x.AuthorType
+	}
+	return AuthorType_AUTHOR_TYPE_UNSPECIFIED
+}
+
+func (x *Participant) GetDisplayName() string {
+	if x != nil {
+		return x.DisplayName
+	}
+	return ""
+}
+
+func (x *Participant) GetAliases() map[string]string {
+	if x != nil {
+		return x.Aliases
+	}
+	return nil
+}
+
+func (x *Participant) GetRole() string {
+	if x != nil {
+		return x.Role
+	}
+	return ""
+}
+
+func (x *Participant) GetBio() string {
+	if x != nil {
+		return x.Bio
+	}
+	return ""
+}
+
+func (x *Participant) GetStatusText() string {
+	if x != nil {
+		return x.StatusText
+	}
+	return ""
+}
+
+func (x *Participant) GetAvatarHash() string {
+	if x != nil {
+		return x.AvatarHash
+	}
+	return ""
+}
+
+func (x *Participant) GetOnline() bool {
+	if x != nil {
+		return x.Online
+	}
+	return false
+}
+
+func (x *Participant) GetLastSeenAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.LastSeenAt
+	}
+	return nil
+}
+
+func (x *Participant) GetProfileVersion() int64 {
+	if x != nil {
+		return x.ProfileVersion
+	}
+	return 0
+}
+
+func (x *Participant) GetPresenceVersion() int64 {
+	if x != nil {
+		return x.PresenceVersion
+	}
+	return 0
+}
+
+func (x *Participant) GetAgentId() string {
+	if x != nil {
+		return x.AgentId
+	}
+	return ""
+}
+
+func (x *Participant) GetCreatedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.CreatedAt
+	}
+	return nil
+}
+
+func (x *Participant) GetUpdatedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.UpdatedAt
+	}
+	return nil
+}
+
+type GetParticipantRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	AuthorId      string                 `protobuf:"bytes,1,opt,name=author_id,json=authorId,proto3" json:"author_id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetParticipantRequest) Reset() {
+	*x = GetParticipantRequest{}
+	mi := &file_chat_proto_msgTypes[18]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetParticipantRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetParticipantRequest) ProtoMessage() {}
+
+func (x *GetParticipantRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[18]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetParticipantRequest.ProtoReflect.Descriptor instead.
+func (*GetParticipantRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{18}
+}
+
+func (x *GetParticipantRequest) GetAuthorId() string {
+	if x != nil {
+		return x.AuthorId
+	}
+	return ""
+}
+
+type BatchGetParticipantsRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	AuthorIds     []string               `protobuf:"bytes,1,rep,name=author_ids,json=authorIds,proto3" json:"author_ids,omitempty"` // server caps size (e.g. 100)
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *BatchGetParticipantsRequest) Reset() {
+	*x = BatchGetParticipantsRequest{}
+	mi := &file_chat_proto_msgTypes[19]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *BatchGetParticipantsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BatchGetParticipantsRequest) ProtoMessage() {}
+
+func (x *BatchGetParticipantsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[19]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BatchGetParticipantsRequest.ProtoReflect.Descriptor instead.
+func (*BatchGetParticipantsRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{19}
+}
+
+func (x *BatchGetParticipantsRequest) GetAuthorIds() []string {
+	if x != nil {
+		return x.AuthorIds
+	}
+	return nil
+}
+
+type BatchGetParticipantsResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Participants  []*Participant         `protobuf:"bytes,1,rep,name=participants,proto3" json:"participants,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *BatchGetParticipantsResponse) Reset() {
+	*x = BatchGetParticipantsResponse{}
+	mi := &file_chat_proto_msgTypes[20]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *BatchGetParticipantsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BatchGetParticipantsResponse) ProtoMessage() {}
+
+func (x *BatchGetParticipantsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[20]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use BatchGetParticipantsResponse.ProtoReflect.Descriptor instead.
+func (*BatchGetParticipantsResponse) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{20}
+}
+
+func (x *BatchGetParticipantsResponse) GetParticipants() []*Participant {
+	if x != nil {
+		return x.Participants
+	}
+	return nil
+}
+
+type ListTopicParticipantsRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	TopicId       string                 `protobuf:"bytes,1,opt,name=topic_id,json=topicId,proto3" json:"topic_id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ListTopicParticipantsRequest) Reset() {
+	*x = ListTopicParticipantsRequest{}
+	mi := &file_chat_proto_msgTypes[21]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ListTopicParticipantsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListTopicParticipantsRequest) ProtoMessage() {}
+
+func (x *ListTopicParticipantsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[21]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListTopicParticipantsRequest.ProtoReflect.Descriptor instead.
+func (*ListTopicParticipantsRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{21}
+}
+
+func (x *ListTopicParticipantsRequest) GetTopicId() string {
+	if x != nil {
+		return x.TopicId
+	}
+	return ""
+}
+
+type ListTopicParticipantsResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Participants  []*Participant         `protobuf:"bytes,1,rep,name=participants,proto3" json:"participants,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *ListTopicParticipantsResponse) Reset() {
+	*x = ListTopicParticipantsResponse{}
+	mi := &file_chat_proto_msgTypes[22]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *ListTopicParticipantsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListTopicParticipantsResponse) ProtoMessage() {}
+
+func (x *ListTopicParticipantsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[22]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListTopicParticipantsResponse.ProtoReflect.Descriptor instead.
+func (*ListTopicParticipantsResponse) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{22}
+}
+
+func (x *ListTopicParticipantsResponse) GetParticipants() []*Participant {
+	if x != nil {
+		return x.Participants
+	}
+	return nil
+}
+
+type GetMyParticipantRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *GetMyParticipantRequest) Reset() {
+	*x = GetMyParticipantRequest{}
+	mi := &file_chat_proto_msgTypes[23]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *GetMyParticipantRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetMyParticipantRequest) ProtoMessage() {}
+
+func (x *GetMyParticipantRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[23]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use GetMyParticipantRequest.ProtoReflect.Descriptor instead.
+func (*GetMyParticipantRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{23}
+}
+
+// RegisterSelfProfileRequest carries only mutable public profile fields.
+// author_id / author_type / agent_id are derived server-side from the
+// authenticated principal and MUST NOT be trusted from the request.
+type RegisterSelfProfileRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	DisplayName   string                 `protobuf:"bytes,1,opt,name=display_name,json=displayName,proto3" json:"display_name,omitempty"`
+	Aliases       map[string]string      `protobuf:"bytes,2,rep,name=aliases,proto3" json:"aliases,omitempty" protobuf_key:"bytes,1,opt,name=key" protobuf_val:"bytes,2,opt,name=value"`
+	Role          string                 `protobuf:"bytes,3,opt,name=role,proto3" json:"role,omitempty"`
+	Bio           string                 `protobuf:"bytes,4,opt,name=bio,proto3" json:"bio,omitempty"`
+	StatusText    string                 `protobuf:"bytes,5,opt,name=status_text,json=statusText,proto3" json:"status_text,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *RegisterSelfProfileRequest) Reset() {
+	*x = RegisterSelfProfileRequest{}
+	mi := &file_chat_proto_msgTypes[24]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *RegisterSelfProfileRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RegisterSelfProfileRequest) ProtoMessage() {}
+
+func (x *RegisterSelfProfileRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[24]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RegisterSelfProfileRequest.ProtoReflect.Descriptor instead.
+func (*RegisterSelfProfileRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{24}
+}
+
+func (x *RegisterSelfProfileRequest) GetDisplayName() string {
+	if x != nil {
+		return x.DisplayName
+	}
+	return ""
+}
+
+func (x *RegisterSelfProfileRequest) GetAliases() map[string]string {
+	if x != nil {
+		return x.Aliases
+	}
+	return nil
+}
+
+func (x *RegisterSelfProfileRequest) GetRole() string {
+	if x != nil {
+		return x.Role
+	}
+	return ""
+}
+
+func (x *RegisterSelfProfileRequest) GetBio() string {
+	if x != nil {
+		return x.Bio
+	}
+	return ""
+}
+
+func (x *RegisterSelfProfileRequest) GetStatusText() string {
+	if x != nil {
+		return x.StatusText
+	}
+	return ""
+}
+
+type SyncMyTopicMembershipsRequest struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Full desired set of topic UUIDs for the authenticated agent.
+	TopicIds      []string `protobuf:"bytes,1,rep,name=topic_ids,json=topicIds,proto3" json:"topic_ids,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SyncMyTopicMembershipsRequest) Reset() {
+	*x = SyncMyTopicMembershipsRequest{}
+	mi := &file_chat_proto_msgTypes[25]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SyncMyTopicMembershipsRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SyncMyTopicMembershipsRequest) ProtoMessage() {}
+
+func (x *SyncMyTopicMembershipsRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[25]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SyncMyTopicMembershipsRequest.ProtoReflect.Descriptor instead.
+func (*SyncMyTopicMembershipsRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{25}
+}
+
+func (x *SyncMyTopicMembershipsRequest) GetTopicIds() []string {
+	if x != nil {
+		return x.TopicIds
+	}
+	return nil
+}
+
+type SyncMyTopicMembershipsResponse struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	TopicIds      []string               `protobuf:"bytes,1,rep,name=topic_ids,json=topicIds,proto3" json:"topic_ids,omitempty"` // authoritative memberships after sync
+	Added         int32                  `protobuf:"varint,2,opt,name=added,proto3" json:"added,omitempty"`
+	Removed       int32                  `protobuf:"varint,3,opt,name=removed,proto3" json:"removed,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *SyncMyTopicMembershipsResponse) Reset() {
+	*x = SyncMyTopicMembershipsResponse{}
+	mi := &file_chat_proto_msgTypes[26]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *SyncMyTopicMembershipsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SyncMyTopicMembershipsResponse) ProtoMessage() {}
+
+func (x *SyncMyTopicMembershipsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[26]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SyncMyTopicMembershipsResponse.ProtoReflect.Descriptor instead.
+func (*SyncMyTopicMembershipsResponse) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{26}
+}
+
+func (x *SyncMyTopicMembershipsResponse) GetTopicIds() []string {
+	if x != nil {
+		return x.TopicIds
+	}
+	return nil
+}
+
+func (x *SyncMyTopicMembershipsResponse) GetAdded() int32 {
+	if x != nil {
+		return x.Added
+	}
+	return 0
+}
+
+func (x *SyncMyTopicMembershipsResponse) GetRemoved() int32 {
+	if x != nil {
+		return x.Removed
+	}
+	return 0
+}
+
+type UploadSelfAvatarRequest struct {
+	state protoimpl.MessageState `protogen:"open.v1"`
+	// Raw image bytes (PNG/JPEG/WebP). Content-Type is validated from magic
+	// bytes + decode, not trusted from metadata alone.
+	Content []byte `protobuf:"bytes,1,opt,name=content,proto3" json:"content,omitempty"`
+	// Optional declared content type; must match detected type when set.
+	ContentType   string `protobuf:"bytes,2,opt,name=content_type,json=contentType,proto3" json:"content_type,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *UploadSelfAvatarRequest) Reset() {
+	*x = UploadSelfAvatarRequest{}
+	mi := &file_chat_proto_msgTypes[27]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *UploadSelfAvatarRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*UploadSelfAvatarRequest) ProtoMessage() {}
+
+func (x *UploadSelfAvatarRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[27]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use UploadSelfAvatarRequest.ProtoReflect.Descriptor instead.
+func (*UploadSelfAvatarRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{27}
+}
+
+func (x *UploadSelfAvatarRequest) GetContent() []byte {
+	if x != nil {
+		return x.Content
+	}
+	return nil
+}
+
+func (x *UploadSelfAvatarRequest) GetContentType() string {
+	if x != nil {
+		return x.ContentType
+	}
+	return ""
+}
+
+type DeleteSelfAvatarRequest struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *DeleteSelfAvatarRequest) Reset() {
+	*x = DeleteSelfAvatarRequest{}
+	mi := &file_chat_proto_msgTypes[28]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *DeleteSelfAvatarRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DeleteSelfAvatarRequest) ProtoMessage() {}
+
+func (x *DeleteSelfAvatarRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_chat_proto_msgTypes[28]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DeleteSelfAvatarRequest.ProtoReflect.Descriptor instead.
+func (*DeleteSelfAvatarRequest) Descriptor() ([]byte, []int) {
+	return file_chat_proto_rawDescGZIP(), []int{28}
+}
+
 var File_chat_proto protoreflect.FileDescriptor

 const file_chat_proto_rawDesc = "" +
@ -1317,7 +2009,65 @@ const file_chat_proto_rawDesc = "" +
 	"\x0fsubscription_id\x18\x03 \x01(\tR\x0esubscriptionId\x12\x14\n" +
 	"\x05ready\x18\x04 \x01(\bR\x05ready\"A\n" +
 	"\x13AcknowledgeResponse\x12*\n" +
-	"\x11last_ack_sequence\x18\x01 \x01(\x03R\x0flastAckSequence*\x8c\x01\n" +
+	"\x11last_ack_sequence\x18\x01 \x01(\x03R\x0flastAckSequence\"\x99\x05\n" +
+	"\vParticipant\x12\x1b\n" +
+	"\tauthor_id\x18\x01 \x01(\tR\bauthorId\x121\n" +
+	"\vauthor_type\x18\x02 \x01(\x0e2\x10.chat.AuthorTypeR\n" +
+	"authorType\x12!\n" +
+	"\fdisplay_name\x18\x03 \x01(\tR\vdisplayName\x128\n" +
+	"\aaliases\x18\x04 \x03(\v2\x1e.chat.Participant.AliasesEntryR\aaliases\x12\x12\n" +
+	"\x04role\x18\x05 \x01(\tR\x04role\x12\x10\n" +
+	"\x03bio\x18\x06 \x01(\tR\x03bio\x12\x1f\n" +
+	"\vstatus_text\x18\a \x01(\tR\n" +
+	"statusText\x12\x1f\n" +
+	"\vavatar_hash\x18\b \x01(\tR\n" +
+	"avatarHash\x12\x16\n" +
+	"\x06online\x18\t \x01(\bR\x06online\x12<\n" +
+	"\flast_seen_at\x18\n" +
+	" \x01(\v2\x1a.google.protobuf.TimestampR\n" +
+	"lastSeenAt\x12'\n" +
+	"\x0fprofile_version\x18\v \x01(\x03R\x0eprofileVersion\x12)\n" +
+	"\x10presence_version\x18\f \x01(\x03R\x0fpresenceVersion\x12\x19\n" +
+	"\bagent_id\x18\r \x01(\tR\aagentId\x129\n" +
+	"\n" +
+	"created_at\x18\x0e \x01(\v2\x1a.google.protobuf.TimestampR\tcreatedAt\x129\n" +
+	"\n" +
+	"updated_at\x18\x0f \x01(\v2\x1a.google.protobuf.TimestampR\tupdatedAt\x1a:\n" +
+	"\fAliasesEntry\x12\x10\n" +
+	"\x03key\x18\x01 \x01(\tR\x03key\x12\x14\n" +
+	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01\"4\n" +
+	"\x15GetParticipantRequest\x12\x1b\n" +
+	"\tauthor_id\x18\x01 \x01(\tR\bauthorId\"<\n" +
+	"\x1bBatchGetParticipantsRequest\x12\x1d\n" +
+	"\n" +
+	"author_ids\x18\x01 \x03(\tR\tauthorIds\"U\n" +
+	"\x1cBatchGetParticipantsResponse\x125\n" +
+	"\fparticipants\x18\x01 \x03(\v2\x11.chat.ParticipantR\fparticipants\"9\n" +
+	"\x1cListTopicParticipantsRequest\x12\x19\n" +
+	"\btopic_id\x18\x01 \x01(\tR\atopicId\"V\n" +
+	"\x1dListTopicParticipantsResponse\x125\n" +
+	"\fparticipants\x18\x01 \x03(\v2\x11.chat.ParticipantR\fparticipants\"\x19\n" +
+	"\x17GetMyParticipantRequest\"\x8b\x02\n" +
+	"\x1aRegisterSelfProfileRequest\x12!\n" +
+	"\fdisplay_name\x18\x01 \x01(\tR\vdisplayName\x12G\n" +
+	"\aaliases\x18\x02 \x03(\v2-.chat.RegisterSelfProfileRequest.AliasesEntryR\aaliases\x12\x12\n" +
+	"\x04role\x18\x03 \x01(\tR\x04role\x12\x10\n" +
+	"\x03bio\x18\x04 \x01(\tR\x03bio\x12\x1f\n" +
+	"\vstatus_text\x18\x05 \x01(\tR\n" +
+	"statusText\x1a:\n" +
+	"\fAliasesEntry\x12\x10\n" +
+	"\x03key\x18\x01 \x01(\tR\x03key\x12\x14\n" +
+	"\x05value\x18\x02 \x01(\tR\x05value:\x028\x01\"<\n" +
+	"\x1dSyncMyTopicMembershipsRequest\x12\x1b\n" +
+	"\ttopic_ids\x18\x01 \x03(\tR\btopicIds\"m\n" +
+	"\x1eSyncMyTopicMembershipsResponse\x12\x1b\n" +
+	"\ttopic_ids\x18\x01 \x03(\tR\btopicIds\x12\x14\n" +
+	"\x05added\x18\x02 \x01(\x05R\x05added\x12\x18\n" +
+	"\aremoved\x18\x03 \x01(\x05R\aremoved\"V\n" +
+	"\x17UploadSelfAvatarRequest\x12\x18\n" +
+	"\acontent\x18\x01 \x01(\fR\acontent\x12!\n" +
+	"\fcontent_type\x18\x02 \x01(\tR\vcontentType\"\x19\n" +
+	"\x17DeleteSelfAvatarRequest*\x8c\x01\n" +
 	"\n" +
 	"AuthorType\x12\x1b\n" +
 	"\x17AUTHOR_TYPE_UNSPECIFIED\x10\x00\x12\x15\n" +
@ -1330,7 +2080,7 @@ const file_chat_proto_rawDesc = "" +
 	"\x12MESSAGE_SOURCE_WEB\x10\x01\x12\x1b\n" +
 	"\x17MESSAGE_SOURCE_TELEGRAM\x10\x02\x12\x18\n" +
 	"\x14MESSAGE_SOURCE_AGENT\x10\x03\x12\x19\n" +
-	"\x15MESSAGE_SOURCE_SYSTEM\x10\x042\xec\x04\n" +
+	"\x15MESSAGE_SOURCE_SYSTEM\x10\x042\xf2\t\n" +
 	"\vChatService\x12?\n" +
 	"\n" +
 	"ListTopics\x12\x17.chat.ListTopicsRequest\x1a\x18.chat.ListTopicsResponse\x12.\n" +
@ -1343,7 +2093,15 @@ const file_chat_proto_rawDesc = "" +
 	"GetMessage\x12\x17.chat.GetMessageRequest\x1a\r.chat.Message\x126\n" +
 	"\aHistory\x12\x14.chat.HistoryRequest\x1a\x15.chat.HistoryResponse\x12<\n" +
 	"\tSubscribe\x12\x16.chat.SubscribeRequest\x1a\x15.chat.DeliveryMessage0\x01\x12B\n" +
-	"\vAcknowledge\x12\x18.chat.AcknowledgeRequest\x1a\x19.chat.AcknowledgeResponseB)Z'gitea.fe.kaien.ru/kaien/l-ai-chat-protob\x06proto3"
+	"\vAcknowledge\x12\x18.chat.AcknowledgeRequest\x1a\x19.chat.AcknowledgeResponse\x12@\n" +
+	"\x0eGetParticipant\x12\x1b.chat.GetParticipantRequest\x1a\x11.chat.Participant\x12]\n" +
+	"\x14BatchGetParticipants\x12!.chat.BatchGetParticipantsRequest\x1a\".chat.BatchGetParticipantsResponse\x12`\n" +
+	"\x15ListTopicParticipants\x12\".chat.ListTopicParticipantsRequest\x1a#.chat.ListTopicParticipantsResponse\x12D\n" +
+	"\x10GetMyParticipant\x12\x1d.chat.GetMyParticipantRequest\x1a\x11.chat.Participant\x12J\n" +
+	"\x13RegisterSelfProfile\x12 .chat.RegisterSelfProfileRequest\x1a\x11.chat.Participant\x12c\n" +
+	"\x16SyncMyTopicMemberships\x12#.chat.SyncMyTopicMembershipsRequest\x1a$.chat.SyncMyTopicMembershipsResponse\x12D\n" +
+	"\x10UploadSelfAvatar\x12\x1d.chat.UploadSelfAvatarRequest\x1a\x11.chat.Participant\x12D\n" +
+	"\x10DeleteSelfAvatar\x12\x1d.chat.DeleteSelfAvatarRequest\x1a\x11.chat.ParticipantB)Z'gitea.fe.kaien.ru/kaien/l-ai-chat-protob\x06proto3"

 var (
 	file_chat_proto_rawDescOnce sync.Once
@ -1358,7 +2116,7 @@ func file_chat_proto_rawDescGZIP() []byte {
 }

 var file_chat_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_chat_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
+var file_chat_proto_msgTypes = make([]protoimpl.MessageInfo, 31)
 var file_chat_proto_goTypes = []any{
 	(AuthorType)(0),                        // 0: chat.AuthorType
 	(MessageSource)(0),                     // 1: chat.MessageSource
@ -1379,44 +2137,82 @@ var file_chat_proto_goTypes = []any{
 	(*DeliveryMessage)(nil),                // 16: chat.DeliveryMessage
 	(*AcknowledgeRequest)(nil),             // 17: chat.AcknowledgeRequest
 	(*AcknowledgeResponse)(nil),            // 18: chat.AcknowledgeResponse
-	(*timestamppb.Timestamp)(nil),   // 19: google.protobuf.Timestamp
+	(*Participant)(nil),                    // 19: chat.Participant
+	(*GetParticipantRequest)(nil),          // 20: chat.GetParticipantRequest
+	(*BatchGetParticipantsRequest)(nil),    // 21: chat.BatchGetParticipantsRequest
+	(*BatchGetParticipantsResponse)(nil),   // 22: chat.BatchGetParticipantsResponse
+	(*ListTopicParticipantsRequest)(nil),   // 23: chat.ListTopicParticipantsRequest
+	(*ListTopicParticipantsResponse)(nil),  // 24: chat.ListTopicParticipantsResponse
+	(*GetMyParticipantRequest)(nil),        // 25: chat.GetMyParticipantRequest
+	(*RegisterSelfProfileRequest)(nil),     // 26: chat.RegisterSelfProfileRequest
+	(*SyncMyTopicMembershipsRequest)(nil),  // 27: chat.SyncMyTopicMembershipsRequest
+	(*SyncMyTopicMembershipsResponse)(nil), // 28: chat.SyncMyTopicMembershipsResponse
+	(*UploadSelfAvatarRequest)(nil),        // 29: chat.UploadSelfAvatarRequest
+	(*DeleteSelfAvatarRequest)(nil),        // 30: chat.DeleteSelfAvatarRequest
+	nil,                                    // 31: chat.Participant.AliasesEntry
+	nil,                                    // 32: chat.RegisterSelfProfileRequest.AliasesEntry
+	(*timestamppb.Timestamp)(nil),          // 33: google.protobuf.Timestamp
 }
 var file_chat_proto_depIdxs = []int32{
-	19, // 0: chat.Topic.created_at:type_name -> google.protobuf.Timestamp
+	33, // 0: chat.Topic.created_at:type_name -> google.protobuf.Timestamp
 	0,  // 1: chat.Message.author_type:type_name -> chat.AuthorType
 	1,  // 2: chat.Message.source:type_name -> chat.MessageSource
-	19, // 3: chat.Message.created_at:type_name -> google.protobuf.Timestamp
+	33, // 3: chat.Message.created_at:type_name -> google.protobuf.Timestamp
 	2,  // 4: chat.ListTopicsResponse.topics:type_name -> chat.Topic
 	0,  // 5: chat.PostMessageRequest.author_type:type_name -> chat.AuthorType
 	1,  // 6: chat.PostMessageRequest.source:type_name -> chat.MessageSource
 	3,  // 7: chat.PostMessageResponse.message:type_name -> chat.Message
 	3,  // 8: chat.HistoryResponse.messages:type_name -> chat.Message
 	3,  // 9: chat.DeliveryMessage.message:type_name -> chat.Message
-	4,  // 10: chat.ChatService.ListTopics:input_type -> chat.ListTopicsRequest
-	6,  // 11: chat.ChatService.GetTopic:input_type -> chat.GetTopicRequest
-	7,  // 12: chat.ChatService.CreateTopic:input_type -> chat.CreateTopicRequest
-	8,  // 13: chat.ChatService.UpdateTopic:input_type -> chat.UpdateTopicRequest
-	9,  // 14: chat.ChatService.PostMessage:input_type -> chat.PostMessageRequest
-	10, // 15: chat.ChatService.AgentPostMessage:input_type -> chat.AgentPostMessageRequest
-	12, // 16: chat.ChatService.GetMessage:input_type -> chat.GetMessageRequest
-	13, // 17: chat.ChatService.History:input_type -> chat.HistoryRequest
-	15, // 18: chat.ChatService.Subscribe:input_type -> chat.SubscribeRequest
-	17, // 19: chat.ChatService.Acknowledge:input_type -> chat.AcknowledgeRequest
-	5,  // 20: chat.ChatService.ListTopics:output_type -> chat.ListTopicsResponse
-	2,  // 21: chat.ChatService.GetTopic:output_type -> chat.Topic
-	2,  // 22: chat.ChatService.CreateTopic:output_type -> chat.Topic
-	2,  // 23: chat.ChatService.UpdateTopic:output_type -> chat.Topic
-	11, // 24: chat.ChatService.PostMessage:output_type -> chat.PostMessageResponse
-	11, // 25: chat.ChatService.AgentPostMessage:output_type -> chat.PostMessageResponse
-	3,  // 26: chat.ChatService.GetMessage:output_type -> chat.Message
-	14, // 27: chat.ChatService.History:output_type -> chat.HistoryResponse
-	16, // 28: chat.ChatService.Subscribe:output_type -> chat.DeliveryMessage
-	18, // 29: chat.ChatService.Acknowledge:output_type -> chat.AcknowledgeResponse
-	20, // [20:30] is the sub-list for method output_type
-	10, // [10:20] is the sub-list for method input_type
-	10, // [10:10] is the sub-list for extension type_name
-	10, // [10:10] is the sub-list for extension extendee
-	0,  // [0:10] is the sub-list for field type_name
+	0,  // 10: chat.Participant.author_type:type_name -> chat.AuthorType
+	31, // 11: chat.Participant.aliases:type_name -> chat.Participant.AliasesEntry
+	33, // 12: chat.Participant.last_seen_at:type_name -> google.protobuf.Timestamp
+	33, // 13: chat.Participant.created_at:type_name -> google.protobuf.Timestamp
+	33, // 14: chat.Participant.updated_at:type_name -> google.protobuf.Timestamp
+	19, // 15: chat.BatchGetParticipantsResponse.participants:type_name -> chat.Participant
+	19, // 16: chat.ListTopicParticipantsResponse.participants:type_name -> chat.Participant
+	32, // 17: chat.RegisterSelfProfileRequest.aliases:type_name -> chat.RegisterSelfProfileRequest.AliasesEntry
+	4,  // 18: chat.ChatService.ListTopics:input_type -> chat.ListTopicsRequest
+	6,  // 19: chat.ChatService.GetTopic:input_type -> chat.GetTopicRequest
+	7,  // 20: chat.ChatService.CreateTopic:input_type -> chat.CreateTopicRequest
+	8,  // 21: chat.ChatService.UpdateTopic:input_type -> chat.UpdateTopicRequest
+	9,  // 22: chat.ChatService.PostMessage:input_type -> chat.PostMessageRequest
+	10, // 23: chat.ChatService.AgentPostMessage:input_type -> chat.AgentPostMessageRequest
+	12, // 24: chat.ChatService.GetMessage:input_type -> chat.GetMessageRequest
+	13, // 25: chat.ChatService.History:input_type -> chat.HistoryRequest
+	15, // 26: chat.ChatService.Subscribe:input_type -> chat.SubscribeRequest
+	17, // 27: chat.ChatService.Acknowledge:input_type -> chat.AcknowledgeRequest
+	20, // 28: chat.ChatService.GetParticipant:input_type -> chat.GetParticipantRequest
+	21, // 29: chat.ChatService.BatchGetParticipants:input_type -> chat.BatchGetParticipantsRequest
+	23, // 30: chat.ChatService.ListTopicParticipants:input_type -> chat.ListTopicParticipantsRequest
+	25, // 31: chat.ChatService.GetMyParticipant:input_type -> chat.GetMyParticipantRequest
+	26, // 32: chat.ChatService.RegisterSelfProfile:input_type -> chat.RegisterSelfProfileRequest
+	27, // 33: chat.ChatService.SyncMyTopicMemberships:input_type -> chat.SyncMyTopicMembershipsRequest
+	29, // 34: chat.ChatService.UploadSelfAvatar:input_type -> chat.UploadSelfAvatarRequest
+	30, // 35: chat.ChatService.DeleteSelfAvatar:input_type -> chat.DeleteSelfAvatarRequest
+	5,  // 36: chat.ChatService.ListTopics:output_type -> chat.ListTopicsResponse
+	2,  // 37: chat.ChatService.GetTopic:output_type -> chat.Topic
+	2,  // 38: chat.ChatService.CreateTopic:output_type -> chat.Topic
+	2,  // 39: chat.ChatService.UpdateTopic:output_type -> chat.Topic
+	11, // 40: chat.ChatService.PostMessage:output_type -> chat.PostMessageResponse
+	11, // 41: chat.ChatService.AgentPostMessage:output_type -> chat.PostMessageResponse
+	3,  // 42: chat.ChatService.GetMessage:output_type -> chat.Message
+	14, // 43: chat.ChatService.History:output_type -> chat.HistoryResponse
+	16, // 44: chat.ChatService.Subscribe:output_type -> chat.DeliveryMessage
+	18, // 45: chat.ChatService.Acknowledge:output_type -> chat.AcknowledgeResponse
+	19, // 46: chat.ChatService.GetParticipant:output_type -> chat.Participant
+	22, // 47: chat.ChatService.BatchGetParticipants:output_type -> chat.BatchGetParticipantsResponse
+	24, // 48: chat.ChatService.ListTopicParticipants:output_type -> chat.ListTopicParticipantsResponse
+	19, // 49: chat.ChatService.GetMyParticipant:output_type -> chat.Participant
+	19, // 50: chat.ChatService.RegisterSelfProfile:output_type -> chat.Participant
+	28, // 51: chat.ChatService.SyncMyTopicMemberships:output_type -> chat.SyncMyTopicMembershipsResponse
+	19, // 52: chat.ChatService.UploadSelfAvatar:output_type -> chat.Participant
+	19, // 53: chat.ChatService.DeleteSelfAvatar:output_type -> chat.Participant
+	36, // [36:54] is the sub-list for method output_type
+	18, // [18:36] is the sub-list for method input_type
+	18, // [18:18] is the sub-list for extension type_name
+	18, // [18:18] is the sub-list for extension extendee
+	0,  // [0:18] is the sub-list for field type_name
 }

 func init() { file_chat_proto_init() }
@ -1437,7 +2233,7 @@ func file_chat_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: unsafe.Slice(unsafe.StringData(file_chat_proto_rawDesc), len(file_chat_proto_rawDesc)),
 			NumEnums:      2,
-			NumMessages:   17,
+			NumMessages:   31,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
--- a/chat.proto
+++ b/chat.proto
@ -69,6 +69,50 @@ service ChatService {
  // it never moves backwards. Cursor changes ONLY here; delivery itself
  // never persists cursor state.
  rpc Acknowledge(AcknowledgeRequest) returns (AcknowledgeResponse);
+
+  // ---- Participant registry (Stage 7.1) ----
+  //
+  // Canonical identity is author_id + author_type. Presentation fields
+  // (display_name, aliases, role, bio, status_text, avatar, presence) are
+  // mutable and resolved at read time ("current-name" semantics). Messages
+  // never snapshot display names.
+
+  // GetParticipant returns one participant by author_id. Missing metadata
+  // yields a fail-soft stub (author_id + author_type only), never NotFound
+  // for known historical authors that were backfilled as stubs.
+  rpc GetParticipant(GetParticipantRequest) returns (Participant);
+
+  // BatchGetParticipants returns participants for the given author_ids
+  // (deduplicated; server-bounded). Unknown IDs may be omitted or returned
+  // as fail-soft stubs — clients must tolerate both.
+  rpc BatchGetParticipants(BatchGetParticipantsRequest) returns (BatchGetParticipantsResponse);
+
+  // ListTopicParticipants returns the durable topic membership roster
+  // (presentation/social state, NOT an ACL). Membership ≠ permission.
+  rpc ListTopicParticipants(ListTopicParticipantsRequest) returns (ListTopicParticipantsResponse);
+
+  // GetMyParticipant returns the authenticated caller's own participant
+  // (agent from service token, or human via HTTP equivalent).
+  rpc GetMyParticipant(GetMyParticipantRequest) returns (Participant);
+
+  // RegisterSelfProfile upserts the authenticated agent's public profile.
+  // Caller-supplied identity fields (author_id, author_type, agent_id) are
+  // ignored: the server derives them from the service token → logical
+  // agent ID → AgentUUID. Returns the authoritative Participant.
+  rpc RegisterSelfProfile(RegisterSelfProfileRequest) returns (Participant);
+
+  // SyncMyTopicMemberships replaces the authenticated agent's durable
+  // topic memberships with the full desired set (add missing, remove
+  // stale). Caller cannot choose another agent's author_id.
+  rpc SyncMyTopicMemberships(SyncMyTopicMembershipsRequest) returns (SyncMyTopicMembershipsResponse);
+
+  // UploadSelfAvatar replaces the authenticated agent's avatar bytes
+  // (PNG/JPEG/WebP only; size/dimension limits enforced server-side).
+  // Returns updated Participant metadata including avatar_hash.
+  rpc UploadSelfAvatar(UploadSelfAvatarRequest) returns (Participant);
+
+  // DeleteSelfAvatar clears the authenticated agent's avatar.
+  rpc DeleteSelfAvatar(DeleteSelfAvatarRequest) returns (Participant);
 }

 // AuthorType is the kind of identity a message author has. HUMAN covers
@ -232,3 +276,82 @@ message AcknowledgeRequest {
 message AcknowledgeResponse {
  int64 last_ack_sequence = 1; // the cursor as stored (never lower than before)
 }
+
+// ---- Participants ----
+
+// Participant is the public presentation of a chat identity.
+// Internal platform IDs (telegram_id, discord_id, email, OAuth subject,
+// global_user_id) are NEVER exposed here.
+message Participant {
+  string author_id = 1; // canonical UUID
+  AuthorType author_type = 2;
+  string display_name = 3; // may be empty for stubs
+  // Locale key → localized alias (e.g. "ru" → "Мира"). Not unique.
+  map<string, string> aliases = 4;
+  string role = 5; // e.g. "Coordinator"; may be empty
+  string bio = 6;
+  string status_text = 7; // participant-owned; distinct from presence
+  string avatar_hash = 8; // empty when no avatar; used for ETag / skip-upload
+  bool online = 9; // server-owned global ONLINE/OFFLINE
+  google.protobuf.Timestamp last_seen_at = 10;
+  int64 profile_version = 11; // monotonic; bumps on profile/avatar changes
+  int64 presence_version = 12; // monotonic; bumps on ONLINE/OFFLINE transitions
+  // Logical agent id (e.g. "coordinator") — set only for AUTHOR_TYPE_AGENT.
+  string agent_id = 13;
+  google.protobuf.Timestamp created_at = 14;
+  google.protobuf.Timestamp updated_at = 15;
+}
+
+message GetParticipantRequest {
+  string author_id = 1;
+}
+
+message BatchGetParticipantsRequest {
+  repeated string author_ids = 1; // server caps size (e.g. 100)
+}
+
+message BatchGetParticipantsResponse {
+  repeated Participant participants = 1;
+}
+
+message ListTopicParticipantsRequest {
+  string topic_id = 1;
+}
+
+message ListTopicParticipantsResponse {
+  repeated Participant participants = 1;
+}
+
+message GetMyParticipantRequest {}
+
+// RegisterSelfProfileRequest carries only mutable public profile fields.
+// author_id / author_type / agent_id are derived server-side from the
+// authenticated principal and MUST NOT be trusted from the request.
+message RegisterSelfProfileRequest {
+  string display_name = 1;
+  map<string, string> aliases = 2;
+  string role = 3;
+  string bio = 4;
+  string status_text = 5;
+}
+
+message SyncMyTopicMembershipsRequest {
+  // Full desired set of topic UUIDs for the authenticated agent.
+  repeated string topic_ids = 1;
+}
+
+message SyncMyTopicMembershipsResponse {
+  repeated string topic_ids = 1; // authoritative memberships after sync
+  int32 added = 2;
+  int32 removed = 3;
+}
+
+message UploadSelfAvatarRequest {
+  // Raw image bytes (PNG/JPEG/WebP). Content-Type is validated from magic
+  // bytes + decode, not trusted from metadata alone.
+  bytes content = 1;
+  // Optional declared content type; must match detected type when set.
+  string content_type = 2;
+}
+
+message DeleteSelfAvatarRequest {}
--- a/chat_grpc.pb.go
+++ b/chat_grpc.pb.go
@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.5.1
-// - protoc             (unknown)
+// - protoc             v7.35.1
 // source: chat.proto

 package l_ai_chat_proto
@ -29,6 +29,14 @@ const (
 	ChatService_History_FullMethodName                = "/chat.ChatService/History"
 	ChatService_Subscribe_FullMethodName              = "/chat.ChatService/Subscribe"
 	ChatService_Acknowledge_FullMethodName            = "/chat.ChatService/Acknowledge"
+	ChatService_GetParticipant_FullMethodName         = "/chat.ChatService/GetParticipant"
+	ChatService_BatchGetParticipants_FullMethodName   = "/chat.ChatService/BatchGetParticipants"
+	ChatService_ListTopicParticipants_FullMethodName  = "/chat.ChatService/ListTopicParticipants"
+	ChatService_GetMyParticipant_FullMethodName       = "/chat.ChatService/GetMyParticipant"
+	ChatService_RegisterSelfProfile_FullMethodName    = "/chat.ChatService/RegisterSelfProfile"
+	ChatService_SyncMyTopicMemberships_FullMethodName = "/chat.ChatService/SyncMyTopicMemberships"
+	ChatService_UploadSelfAvatar_FullMethodName       = "/chat.ChatService/UploadSelfAvatar"
+	ChatService_DeleteSelfAvatar_FullMethodName       = "/chat.ChatService/DeleteSelfAvatar"
 )

 // ChatServiceClient is the client API for ChatService service.
@ -89,6 +97,35 @@ type ChatServiceClient interface {
 	// it never moves backwards. Cursor changes ONLY here; delivery itself
 	// never persists cursor state.
 	Acknowledge(ctx context.Context, in *AcknowledgeRequest, opts ...grpc.CallOption) (*AcknowledgeResponse, error)
+	// GetParticipant returns one participant by author_id. Missing metadata
+	// yields a fail-soft stub (author_id + author_type only), never NotFound
+	// for known historical authors that were backfilled as stubs.
+	GetParticipant(ctx context.Context, in *GetParticipantRequest, opts ...grpc.CallOption) (*Participant, error)
+	// BatchGetParticipants returns participants for the given author_ids
+	// (deduplicated; server-bounded). Unknown IDs may be omitted or returned
+	// as fail-soft stubs — clients must tolerate both.
+	BatchGetParticipants(ctx context.Context, in *BatchGetParticipantsRequest, opts ...grpc.CallOption) (*BatchGetParticipantsResponse, error)
+	// ListTopicParticipants returns the durable topic membership roster
+	// (presentation/social state, NOT an ACL). Membership ≠ permission.
+	ListTopicParticipants(ctx context.Context, in *ListTopicParticipantsRequest, opts ...grpc.CallOption) (*ListTopicParticipantsResponse, error)
+	// GetMyParticipant returns the authenticated caller's own participant
+	// (agent from service token, or human via HTTP equivalent).
+	GetMyParticipant(ctx context.Context, in *GetMyParticipantRequest, opts ...grpc.CallOption) (*Participant, error)
+	// RegisterSelfProfile upserts the authenticated agent's public profile.
+	// Caller-supplied identity fields (author_id, author_type, agent_id) are
+	// ignored: the server derives them from the service token → logical
+	// agent ID → AgentUUID. Returns the authoritative Participant.
+	RegisterSelfProfile(ctx context.Context, in *RegisterSelfProfileRequest, opts ...grpc.CallOption) (*Participant, error)
+	// SyncMyTopicMemberships replaces the authenticated agent's durable
+	// topic memberships with the full desired set (add missing, remove
+	// stale). Caller cannot choose another agent's author_id.
+	SyncMyTopicMemberships(ctx context.Context, in *SyncMyTopicMembershipsRequest, opts ...grpc.CallOption) (*SyncMyTopicMembershipsResponse, error)
+	// UploadSelfAvatar replaces the authenticated agent's avatar bytes
+	// (PNG/JPEG/WebP only; size/dimension limits enforced server-side).
+	// Returns updated Participant metadata including avatar_hash.
+	UploadSelfAvatar(ctx context.Context, in *UploadSelfAvatarRequest, opts ...grpc.CallOption) (*Participant, error)
+	// DeleteSelfAvatar clears the authenticated agent's avatar.
+	DeleteSelfAvatar(ctx context.Context, in *DeleteSelfAvatarRequest, opts ...grpc.CallOption) (*Participant, error)
 }

 type chatServiceClient struct {
@ -208,6 +245,86 @@ func (c *chatServiceClient) Acknowledge(ctx context.Context, in *AcknowledgeRequ
 	return out, nil
 }

+func (c *chatServiceClient) GetParticipant(ctx context.Context, in *GetParticipantRequest, opts ...grpc.CallOption) (*Participant, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Participant)
+	err := c.cc.Invoke(ctx, ChatService_GetParticipant_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) BatchGetParticipants(ctx context.Context, in *BatchGetParticipantsRequest, opts ...grpc.CallOption) (*BatchGetParticipantsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(BatchGetParticipantsResponse)
+	err := c.cc.Invoke(ctx, ChatService_BatchGetParticipants_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) ListTopicParticipants(ctx context.Context, in *ListTopicParticipantsRequest, opts ...grpc.CallOption) (*ListTopicParticipantsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(ListTopicParticipantsResponse)
+	err := c.cc.Invoke(ctx, ChatService_ListTopicParticipants_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) GetMyParticipant(ctx context.Context, in *GetMyParticipantRequest, opts ...grpc.CallOption) (*Participant, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Participant)
+	err := c.cc.Invoke(ctx, ChatService_GetMyParticipant_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) RegisterSelfProfile(ctx context.Context, in *RegisterSelfProfileRequest, opts ...grpc.CallOption) (*Participant, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Participant)
+	err := c.cc.Invoke(ctx, ChatService_RegisterSelfProfile_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) SyncMyTopicMemberships(ctx context.Context, in *SyncMyTopicMembershipsRequest, opts ...grpc.CallOption) (*SyncMyTopicMembershipsResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(SyncMyTopicMembershipsResponse)
+	err := c.cc.Invoke(ctx, ChatService_SyncMyTopicMemberships_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) UploadSelfAvatar(ctx context.Context, in *UploadSelfAvatarRequest, opts ...grpc.CallOption) (*Participant, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Participant)
+	err := c.cc.Invoke(ctx, ChatService_UploadSelfAvatar_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatServiceClient) DeleteSelfAvatar(ctx context.Context, in *DeleteSelfAvatarRequest, opts ...grpc.CallOption) (*Participant, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(Participant)
+	err := c.cc.Invoke(ctx, ChatService_DeleteSelfAvatar_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // ChatServiceServer is the server API for ChatService service.
 // All implementations must embed UnimplementedChatServiceServer
 // for forward compatibility.
@ -266,6 +383,35 @@ type ChatServiceServer interface {
 	// it never moves backwards. Cursor changes ONLY here; delivery itself
 	// never persists cursor state.
 	Acknowledge(context.Context, *AcknowledgeRequest) (*AcknowledgeResponse, error)
+	// GetParticipant returns one participant by author_id. Missing metadata
+	// yields a fail-soft stub (author_id + author_type only), never NotFound
+	// for known historical authors that were backfilled as stubs.
+	GetParticipant(context.Context, *GetParticipantRequest) (*Participant, error)
+	// BatchGetParticipants returns participants for the given author_ids
+	// (deduplicated; server-bounded). Unknown IDs may be omitted or returned
+	// as fail-soft stubs — clients must tolerate both.
+	BatchGetParticipants(context.Context, *BatchGetParticipantsRequest) (*BatchGetParticipantsResponse, error)
+	// ListTopicParticipants returns the durable topic membership roster
+	// (presentation/social state, NOT an ACL). Membership ≠ permission.
+	ListTopicParticipants(context.Context, *ListTopicParticipantsRequest) (*ListTopicParticipantsResponse, error)
+	// GetMyParticipant returns the authenticated caller's own participant
+	// (agent from service token, or human via HTTP equivalent).
+	GetMyParticipant(context.Context, *GetMyParticipantRequest) (*Participant, error)
+	// RegisterSelfProfile upserts the authenticated agent's public profile.
+	// Caller-supplied identity fields (author_id, author_type, agent_id) are
+	// ignored: the server derives them from the service token → logical
+	// agent ID → AgentUUID. Returns the authoritative Participant.
+	RegisterSelfProfile(context.Context, *RegisterSelfProfileRequest) (*Participant, error)
+	// SyncMyTopicMemberships replaces the authenticated agent's durable
+	// topic memberships with the full desired set (add missing, remove
+	// stale). Caller cannot choose another agent's author_id.
+	SyncMyTopicMemberships(context.Context, *SyncMyTopicMembershipsRequest) (*SyncMyTopicMembershipsResponse, error)
+	// UploadSelfAvatar replaces the authenticated agent's avatar bytes
+	// (PNG/JPEG/WebP only; size/dimension limits enforced server-side).
+	// Returns updated Participant metadata including avatar_hash.
+	UploadSelfAvatar(context.Context, *UploadSelfAvatarRequest) (*Participant, error)
+	// DeleteSelfAvatar clears the authenticated agent's avatar.
+	DeleteSelfAvatar(context.Context, *DeleteSelfAvatarRequest) (*Participant, error)
 	mustEmbedUnimplementedChatServiceServer()
 }

@ -306,6 +452,30 @@ func (UnimplementedChatServiceServer) Subscribe(*SubscribeRequest, grpc.ServerSt
 func (UnimplementedChatServiceServer) Acknowledge(context.Context, *AcknowledgeRequest) (*AcknowledgeResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Acknowledge not implemented")
 }
+func (UnimplementedChatServiceServer) GetParticipant(context.Context, *GetParticipantRequest) (*Participant, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetParticipant not implemented")
+}
+func (UnimplementedChatServiceServer) BatchGetParticipants(context.Context, *BatchGetParticipantsRequest) (*BatchGetParticipantsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method BatchGetParticipants not implemented")
+}
+func (UnimplementedChatServiceServer) ListTopicParticipants(context.Context, *ListTopicParticipantsRequest) (*ListTopicParticipantsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListTopicParticipants not implemented")
+}
+func (UnimplementedChatServiceServer) GetMyParticipant(context.Context, *GetMyParticipantRequest) (*Participant, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetMyParticipant not implemented")
+}
+func (UnimplementedChatServiceServer) RegisterSelfProfile(context.Context, *RegisterSelfProfileRequest) (*Participant, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method RegisterSelfProfile not implemented")
+}
+func (UnimplementedChatServiceServer) SyncMyTopicMemberships(context.Context, *SyncMyTopicMembershipsRequest) (*SyncMyTopicMembershipsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SyncMyTopicMemberships not implemented")
+}
+func (UnimplementedChatServiceServer) UploadSelfAvatar(context.Context, *UploadSelfAvatarRequest) (*Participant, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method UploadSelfAvatar not implemented")
+}
+func (UnimplementedChatServiceServer) DeleteSelfAvatar(context.Context, *DeleteSelfAvatarRequest) (*Participant, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method DeleteSelfAvatar not implemented")
+}
 func (UnimplementedChatServiceServer) mustEmbedUnimplementedChatServiceServer() {}
 func (UnimplementedChatServiceServer) testEmbeddedByValue()                     {}

@ -500,6 +670,150 @@ func _ChatService_Acknowledge_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }

+func _ChatService_GetParticipant_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetParticipantRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).GetParticipant(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_GetParticipant_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).GetParticipant(ctx, req.(*GetParticipantRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_BatchGetParticipants_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BatchGetParticipantsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).BatchGetParticipants(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_BatchGetParticipants_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).BatchGetParticipants(ctx, req.(*BatchGetParticipantsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_ListTopicParticipants_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListTopicParticipantsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).ListTopicParticipants(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_ListTopicParticipants_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).ListTopicParticipants(ctx, req.(*ListTopicParticipantsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_GetMyParticipant_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(GetMyParticipantRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).GetMyParticipant(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_GetMyParticipant_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).GetMyParticipant(ctx, req.(*GetMyParticipantRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_RegisterSelfProfile_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RegisterSelfProfileRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).RegisterSelfProfile(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_RegisterSelfProfile_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).RegisterSelfProfile(ctx, req.(*RegisterSelfProfileRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_SyncMyTopicMemberships_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SyncMyTopicMembershipsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).SyncMyTopicMemberships(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_SyncMyTopicMemberships_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).SyncMyTopicMemberships(ctx, req.(*SyncMyTopicMembershipsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_UploadSelfAvatar_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(UploadSelfAvatarRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).UploadSelfAvatar(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_UploadSelfAvatar_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).UploadSelfAvatar(ctx, req.(*UploadSelfAvatarRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ChatService_DeleteSelfAvatar_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DeleteSelfAvatarRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ChatServiceServer).DeleteSelfAvatar(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: ChatService_DeleteSelfAvatar_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ChatServiceServer).DeleteSelfAvatar(ctx, req.(*DeleteSelfAvatarRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // ChatService_ServiceDesc is the grpc.ServiceDesc for ChatService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@ -543,6 +857,38 @@ var ChatService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "Acknowledge",
 			Handler:    _ChatService_Acknowledge_Handler,
 		},
+		{
+			MethodName: "GetParticipant",
+			Handler:    _ChatService_GetParticipant_Handler,
+		},
+		{
+			MethodName: "BatchGetParticipants",
+			Handler:    _ChatService_BatchGetParticipants_Handler,
+		},
+		{
+			MethodName: "ListTopicParticipants",
+			Handler:    _ChatService_ListTopicParticipants_Handler,
+		},
+		{
+			MethodName: "GetMyParticipant",
+			Handler:    _ChatService_GetMyParticipant_Handler,
+		},
+		{
+			MethodName: "RegisterSelfProfile",
+			Handler:    _ChatService_RegisterSelfProfile_Handler,
+		},
+		{
+			MethodName: "SyncMyTopicMemberships",
+			Handler:    _ChatService_SyncMyTopicMemberships_Handler,
+		},
+		{
+			MethodName: "UploadSelfAvatar",
+			Handler:    _ChatService_UploadSelfAvatar_Handler,
+		},
+		{
+			MethodName: "DeleteSelfAvatar",
+			Handler:    _ChatService_DeleteSelfAvatar_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{