diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5783d3..7116587 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,30 @@ called out explicitly even when nothing else did.
 release notes, so a version with no entry here does not release. Write the entry in the same PR that
 syncs the contract, while the diff is still in front of you.
 
+## 0.17.0
+
+Synced to [`flipcash2-protobuf-api@3bb442d3`](https://github.com/code-payments/flipcash2-protobuf-api/commit/3bb442d359dd8452b4e3eca5f5c1ca463e7f5a4b),
+picking up [#134](https://github.com/code-payments/flipcash2-protobuf-api/pull/134). Only `chat.v1`
+moved.
+
+### Added
+
+- Group descriptions, up to 160 characters and moderated like the title.
+  - `chat.v1.Metadata.description` (= 16).
+  - Set at creation through `description` on `PublicGroupChatParameters` (= 4) and
+    `PrivateGroupChatParameters` (= 3). Optional; empty sets none.
+  - Changed through `EditChatRequest.description` (= 4), a `Description { value }` wrapper: unset
+    leaves the description alone, and a set wrapper with an empty `value` clears it.
+  - Announced as `MetadataUpdate.DescriptionChanged` (= 6, `new_description`).
+- `DESCRIPTION_MODERATED` on `StartChatResponse.Result` (= 6) and `EditChatResponse.Result` (= 5).
+  The response's `flagged_category` is set for it, as it is for `TITLE_MODERATED`.
+
+### Upgrading
+
+Nothing existing changed: no renames, and no field or enum renumbering. Both new result cases come
+after the existing ones. A client that ignores `description` keeps working, but one with an
+exhaustive `MetadataUpdate` switch needs a `DescriptionChanged` case.
+
 ## 0.16.0
 
 Synced to [`flipcash2-protobuf-api@ec66e6b1`](https://github.com/code-payments/flipcash2-protobuf-api/commit/ec66e6b12c59d7eae3281341e74fe8853c90a306),
diff --git a/Sources/Flipcash2ClientProtocol/ContractInfo.swift b/Sources/Flipcash2ClientProtocol/ContractInfo.swift
index 999458b..c054b99 100644
--- a/Sources/Flipcash2ClientProtocol/ContractInfo.swift
+++ b/Sources/Flipcash2ClientProtocol/ContractInfo.swift
@@ -1,8 +1,8 @@
 // Generated by scripts/generate-swift.sh. Do not edit.
 
 public enum Flipcash2ContractInfo {
-    public static let version = "0.16.0-dev"
-    public static let protoCommit = "ec66e6b12c59d7eae3281341e74fe8853c90a306"
+    public static let version = "0.17.0-dev"
+    public static let protoCommit = "3bb442d359dd8452b4e3eca5f5c1ca463e7f5a4b"
 
     public static var isLocal: Bool { protoCommit == localSentinel }
 
diff --git a/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.grpc.swift b/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.grpc.swift
index a6eacd2..70c2d3f 100644
--- a/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.grpc.swift
+++ b/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.grpc.swift
@@ -578,8 +578,8 @@ extension Flipcash_Chat_V1_Chat {
         /// > 
         /// > Only a group chat may be edited, and only by a member the server permits
         /// > to edit it, as reported by ViewerState.Permissions.can_edit; anyone else
-        /// > is DENIED. A new title is moderated like
-        /// > StartChat's. A new picture is a blob the caller has already uploaded via
+        /// > is DENIED. A new title or description is moderated like StartChat's. A
+        /// > new picture is a blob the caller has already uploaded via
         /// > BlobStorage: the client uploads only the ORIGINAL and passes the
         /// > resulting BlobId once the blob is READY, and the server derives the
         /// > remaining renditions. Setting a field to the value the chat already has
@@ -588,7 +588,8 @@ extension Flipcash_Chat_V1_Chat {
         /// > 
         /// > Every real change reaches the chat's members, including the caller's
         /// > other devices, on the event stream as one MetadataUpdate per field
-        /// > changed: TitleChanged for the title, PictureChanged for the picture.
+        /// > changed: TitleChanged for the title, PictureChanged for the picture,
+        /// > DescriptionChanged for the description.
         ///
         /// - Parameters:
         ///   - request: A request containing a single `Flipcash_Chat_V1_EditChatRequest` message.
@@ -1320,8 +1321,8 @@ extension Flipcash_Chat_V1_Chat {
         /// > 
         /// > Only a group chat may be edited, and only by a member the server permits
         /// > to edit it, as reported by ViewerState.Permissions.can_edit; anyone else
-        /// > is DENIED. A new title is moderated like
-        /// > StartChat's. A new picture is a blob the caller has already uploaded via
+        /// > is DENIED. A new title or description is moderated like StartChat's. A
+        /// > new picture is a blob the caller has already uploaded via
         /// > BlobStorage: the client uploads only the ORIGINAL and passes the
         /// > resulting BlobId once the blob is READY, and the server derives the
         /// > remaining renditions. Setting a field to the value the chat already has
@@ -1330,7 +1331,8 @@ extension Flipcash_Chat_V1_Chat {
         /// > 
         /// > Every real change reaches the chat's members, including the caller's
         /// > other devices, on the event stream as one MetadataUpdate per field
-        /// > changed: TitleChanged for the title, PictureChanged for the picture.
+        /// > changed: TitleChanged for the title, PictureChanged for the picture,
+        /// > DescriptionChanged for the description.
         ///
         /// - Parameters:
         ///   - request: A request containing a single `Flipcash_Chat_V1_EditChatRequest` message.
@@ -2120,8 +2122,8 @@ extension Flipcash_Chat_V1_Chat.ClientProtocol {
     /// > 
     /// > Only a group chat may be edited, and only by a member the server permits
     /// > to edit it, as reported by ViewerState.Permissions.can_edit; anyone else
-    /// > is DENIED. A new title is moderated like
-    /// > StartChat's. A new picture is a blob the caller has already uploaded via
+    /// > is DENIED. A new title or description is moderated like StartChat's. A
+    /// > new picture is a blob the caller has already uploaded via
     /// > BlobStorage: the client uploads only the ORIGINAL and passes the
     /// > resulting BlobId once the blob is READY, and the server derives the
     /// > remaining renditions. Setting a field to the value the chat already has
@@ -2130,7 +2132,8 @@ extension Flipcash_Chat_V1_Chat.ClientProtocol {
     /// > 
     /// > Every real change reaches the chat's members, including the caller's
     /// > other devices, on the event stream as one MetadataUpdate per field
-    /// > changed: TitleChanged for the title, PictureChanged for the picture.
+    /// > changed: TitleChanged for the title, PictureChanged for the picture,
+    /// > DescriptionChanged for the description.
     ///
     /// - Parameters:
     ///   - request: A request containing a single `Flipcash_Chat_V1_EditChatRequest` message.
@@ -2901,8 +2904,8 @@ extension Flipcash_Chat_V1_Chat.ClientProtocol {
     /// > 
     /// > Only a group chat may be edited, and only by a member the server permits
     /// > to edit it, as reported by ViewerState.Permissions.can_edit; anyone else
-    /// > is DENIED. A new title is moderated like
-    /// > StartChat's. A new picture is a blob the caller has already uploaded via
+    /// > is DENIED. A new title or description is moderated like StartChat's. A
+    /// > new picture is a blob the caller has already uploaded via
     /// > BlobStorage: the client uploads only the ORIGINAL and passes the
     /// > resulting BlobId once the blob is READY, and the server derives the
     /// > remaining renditions. Setting a field to the value the chat already has
@@ -2911,7 +2914,8 @@ extension Flipcash_Chat_V1_Chat.ClientProtocol {
     /// > 
     /// > Every real change reaches the chat's members, including the caller's
     /// > other devices, on the event stream as one MetadataUpdate per field
-    /// > changed: TitleChanged for the title, PictureChanged for the picture.
+    /// > changed: TitleChanged for the title, PictureChanged for the picture,
+    /// > DescriptionChanged for the description.
     ///
     /// - Parameters:
     ///   - message: request message to send.
diff --git a/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.pb.swift b/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.pb.swift
index e28564f..078cc52 100644
--- a/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.pb.swift
+++ b/Sources/Flipcash2ClientProtocol/chat_v1_chat_service.pb.swift
@@ -37,11 +37,11 @@ public struct Flipcash_Chat_V1_GetChatRequest: Sendable {
   /// What the client intends to render of the chat's messaging state — its
   /// last_message and latest_event_sequence — and so whether they may be
   /// returned redacted (see messaging.v1.ViewMode). A group's record (title,
-  /// picture, rules, roster summary) is returned to every registered user
-  /// whatever the mode; the mode decides only the messaging state, which is
-  /// withheld from a viewer who may not read the chat under it. Unset (FULL)
-  /// is the pre-redaction contract: messaging state for a viewer who may
-  /// read the chat in full, the bare record for anyone else.
+  /// description, picture, rules, roster summary) is returned to every
+  /// registered user whatever the mode; the mode decides only the messaging
+  /// state, which is withheld from a viewer who may not read the chat under
+  /// it. Unset (FULL) is the pre-redaction contract: messaging state for a
+  /// viewer who may read the chat in full, the bare record for anyone else.
   ///
   /// Must be REDACTED when auth is unset; any other mode is DENIED.
   public var viewMode: Flipcash_Messaging_V1_ViewMode = .full
@@ -678,6 +678,10 @@ public struct Flipcash_Chat_V1_StartChatRequest: Sendable {
     /// Clears the value of `rules`. Subsequent reads from it will return its default value.
     public mutating func clearRules() {self._rules = nil}
 
+    /// Description for the chat. Optional; empty sets none. Moderated like
+    /// the title.
+    public var description_p: String = String()
+
     public var unknownFields = SwiftProtobuf.UnknownStorage()
 
     public init() {}
@@ -726,6 +730,10 @@ public struct Flipcash_Chat_V1_StartChatRequest: Sendable {
     /// Clears the value of `picture`. Subsequent reads from it will return its default value.
     public mutating func clearPicture() {self._picture = nil}
 
+    /// Description for the chat. Optional; empty sets none. Moderated like
+    /// the title.
+    public var description_p: String = String()
+
     public var unknownFields = SwiftProtobuf.UnknownStorage()
 
     public init() {}
@@ -759,8 +767,8 @@ public struct Flipcash_Chat_V1_StartChatResponse: Sendable {
   public mutating func clearChat() {self._chat = nil}
 
   /// The best-fit category that tripped moderation, mirroring the Moderation
-  /// service's vocabulary. Set only when result == TITLE_MODERATED; NONE
-  /// otherwise.
+  /// service's vocabulary. Set only when result == TITLE_MODERATED or
+  /// DESCRIPTION_MODERATED; NONE otherwise.
   public var flaggedCategory: Flipcash_Moderation_V1_FlaggedCategory = .none
 
   public var unknownFields = SwiftProtobuf.UnknownStorage()
@@ -773,6 +781,7 @@ public struct Flipcash_Chat_V1_StartChatResponse: Sendable {
     case pictureBlobNotAccepted // = 3
     case invalidRules // = 4
     case rulesNotSatisfied // = 5
+    case descriptionModerated // = 6
     case UNRECOGNIZED(Int)
 
     public init() {
@@ -787,6 +796,7 @@ public struct Flipcash_Chat_V1_StartChatResponse: Sendable {
       case 3: self = .pictureBlobNotAccepted
       case 4: self = .invalidRules
       case 5: self = .rulesNotSatisfied
+      case 6: self = .descriptionModerated
       default: self = .UNRECOGNIZED(rawValue)
       }
     }
@@ -799,6 +809,7 @@ public struct Flipcash_Chat_V1_StartChatResponse: Sendable {
       case .pictureBlobNotAccepted: return 3
       case .invalidRules: return 4
       case .rulesNotSatisfied: return 5
+      case .descriptionModerated: return 6
       case .UNRECOGNIZED(let i): return i
       }
     }
@@ -811,6 +822,7 @@ public struct Flipcash_Chat_V1_StartChatResponse: Sendable {
       .pictureBlobNotAccepted,
       .invalidRules,
       .rulesNotSatisfied,
+      .descriptionModerated,
     ]
 
   }
@@ -1033,6 +1045,16 @@ public struct Flipcash_Chat_V1_EditChatRequest: Sendable {
   /// Clears the value of `picture`. Subsequent reads from it will return its default value.
   public mutating func clearPicture() {self._picture = nil}
 
+  /// The new description. Left unchanged when unset.
+  public var description_p: Flipcash_Chat_V1_EditChatRequest.Description {
+    get {return _description_p ?? Flipcash_Chat_V1_EditChatRequest.Description()}
+    set {_description_p = newValue}
+  }
+  /// Returns true if `description_p` has been explicitly set.
+  public var hasDescription_p: Bool {return self._description_p != nil}
+  /// Clears the value of `description_p`. Subsequent reads from it will return its default value.
+  public mutating func clearDescription_p() {self._description_p = nil}
+
   public var auth: Flipcash_Common_V1_Auth {
     get {return _auth ?? Flipcash_Common_V1_Auth()}
     set {_auth = newValue}
@@ -1080,11 +1102,25 @@ public struct Flipcash_Chat_V1_EditChatRequest: Sendable {
     fileprivate var _blobID: Flipcash_Blob_V1_BlobId? = nil
   }
 
+  public struct Description: Sendable {
+    // SwiftProtobuf.Message conformance is added in an extension below. See the
+    // `Message` and `Message+*Additions` files in the SwiftProtobuf library for
+    // methods supported on all messages.
+
+    /// The new description. Empty clears it.
+    public var value: String = String()
+
+    public var unknownFields = SwiftProtobuf.UnknownStorage()
+
+    public init() {}
+  }
+
   public init() {}
 
   fileprivate var _chatID: Flipcash_Common_V1_ChatId? = nil
   fileprivate var _title: Flipcash_Chat_V1_EditChatRequest.Title? = nil
   fileprivate var _picture: Flipcash_Chat_V1_EditChatRequest.Picture? = nil
+  fileprivate var _description_p: Flipcash_Chat_V1_EditChatRequest.Description? = nil
   fileprivate var _auth: Flipcash_Common_V1_Auth? = nil
 }
 
@@ -1108,8 +1144,8 @@ public struct Flipcash_Chat_V1_EditChatResponse: Sendable {
   public mutating func clearChat() {self._chat = nil}
 
   /// The best-fit category that tripped moderation, mirroring the Moderation
-  /// service's vocabulary. Set only when result == TITLE_MODERATED; NONE
-  /// otherwise.
+  /// service's vocabulary. Set only when result == TITLE_MODERATED or
+  /// DESCRIPTION_MODERATED; NONE otherwise.
   public var flaggedCategory: Flipcash_Moderation_V1_FlaggedCategory = .none
 
   public var unknownFields = SwiftProtobuf.UnknownStorage()
@@ -1121,6 +1157,7 @@ public struct Flipcash_Chat_V1_EditChatResponse: Sendable {
     case notFound // = 2
     case titleModerated // = 3
     case pictureBlobNotAccepted // = 4
+    case descriptionModerated // = 5
     case UNRECOGNIZED(Int)
 
     public init() {
@@ -1134,6 +1171,7 @@ public struct Flipcash_Chat_V1_EditChatResponse: Sendable {
       case 2: self = .notFound
       case 3: self = .titleModerated
       case 4: self = .pictureBlobNotAccepted
+      case 5: self = .descriptionModerated
       default: self = .UNRECOGNIZED(rawValue)
       }
     }
@@ -1145,6 +1183,7 @@ public struct Flipcash_Chat_V1_EditChatResponse: Sendable {
       case .notFound: return 2
       case .titleModerated: return 3
       case .pictureBlobNotAccepted: return 4
+      case .descriptionModerated: return 5
       case .UNRECOGNIZED(let i): return i
       }
     }
@@ -1156,6 +1195,7 @@ public struct Flipcash_Chat_V1_EditChatResponse: Sendable {
       .notFound,
       .titleModerated,
       .pictureBlobNotAccepted,
+      .descriptionModerated,
     ]
 
   }
@@ -2648,7 +2688,7 @@ extension Flipcash_Chat_V1_StartChatRequest: SwiftProtobuf.Message, SwiftProtobu
 
 extension Flipcash_Chat_V1_StartChatRequest.PublicGroupChatParameters: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = Flipcash_Chat_V1_StartChatRequest.protoMessageName + ".PublicGroupChatParameters"
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}title\0\u{1}picture\0\u{1}rules\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}title\0\u{1}picture\0\u{1}rules\0\u{1}description\0")
 
   public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
     while let fieldNumber = try decoder.nextFieldNumber() {
@@ -2659,6 +2699,7 @@ extension Flipcash_Chat_V1_StartChatRequest.PublicGroupChatParameters: SwiftProt
       case 1: try { try decoder.decodeSingularStringField(value: &self.title) }()
       case 2: try { try decoder.decodeSingularMessageField(value: &self._picture) }()
       case 3: try { try decoder.decodeSingularMessageField(value: &self._rules) }()
+      case 4: try { try decoder.decodeSingularStringField(value: &self.description_p) }()
       default: break
       }
     }
@@ -2678,6 +2719,9 @@ extension Flipcash_Chat_V1_StartChatRequest.PublicGroupChatParameters: SwiftProt
     try { if let v = self._rules {
       try visitor.visitSingularMessageField(value: v, fieldNumber: 3)
     } }()
+    if !self.description_p.isEmpty {
+      try visitor.visitSingularStringField(value: self.description_p, fieldNumber: 4)
+    }
     try unknownFields.traverse(visitor: &visitor)
   }
 
@@ -2685,6 +2729,7 @@ extension Flipcash_Chat_V1_StartChatRequest.PublicGroupChatParameters: SwiftProt
     if lhs.title != rhs.title {return false}
     if lhs._picture != rhs._picture {return false}
     if lhs._rules != rhs._rules {return false}
+    if lhs.description_p != rhs.description_p {return false}
     if lhs.unknownFields != rhs.unknownFields {return false}
     return true
   }
@@ -2692,7 +2737,7 @@ extension Flipcash_Chat_V1_StartChatRequest.PublicGroupChatParameters: SwiftProt
 
 extension Flipcash_Chat_V1_StartChatRequest.PrivateGroupChatParameters: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = Flipcash_Chat_V1_StartChatRequest.protoMessageName + ".PrivateGroupChatParameters"
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}title\0\u{1}picture\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}title\0\u{1}picture\0\u{1}description\0")
 
   public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
     while let fieldNumber = try decoder.nextFieldNumber() {
@@ -2702,6 +2747,7 @@ extension Flipcash_Chat_V1_StartChatRequest.PrivateGroupChatParameters: SwiftPro
       switch fieldNumber {
       case 1: try { try decoder.decodeSingularStringField(value: &self.title) }()
       case 2: try { try decoder.decodeSingularMessageField(value: &self._picture) }()
+      case 3: try { try decoder.decodeSingularStringField(value: &self.description_p) }()
       default: break
       }
     }
@@ -2718,12 +2764,16 @@ extension Flipcash_Chat_V1_StartChatRequest.PrivateGroupChatParameters: SwiftPro
     try { if let v = self._picture {
       try visitor.visitSingularMessageField(value: v, fieldNumber: 2)
     } }()
+    if !self.description_p.isEmpty {
+      try visitor.visitSingularStringField(value: self.description_p, fieldNumber: 3)
+    }
     try unknownFields.traverse(visitor: &visitor)
   }
 
   public static func ==(lhs: Flipcash_Chat_V1_StartChatRequest.PrivateGroupChatParameters, rhs: Flipcash_Chat_V1_StartChatRequest.PrivateGroupChatParameters) -> Bool {
     if lhs.title != rhs.title {return false}
     if lhs._picture != rhs._picture {return false}
+    if lhs.description_p != rhs.description_p {return false}
     if lhs.unknownFields != rhs.unknownFields {return false}
     return true
   }
@@ -2774,7 +2824,7 @@ extension Flipcash_Chat_V1_StartChatResponse: SwiftProtobuf.Message, SwiftProtob
 }
 
 extension Flipcash_Chat_V1_StartChatResponse.Result: SwiftProtobuf._ProtoNameProviding {
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{2}\0OK\0\u{1}DENIED\0\u{1}TITLE_MODERATED\0\u{1}PICTURE_BLOB_NOT_ACCEPTED\0\u{1}INVALID_RULES\0\u{1}RULES_NOT_SATISFIED\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{2}\0OK\0\u{1}DENIED\0\u{1}TITLE_MODERATED\0\u{1}PICTURE_BLOB_NOT_ACCEPTED\0\u{1}INVALID_RULES\0\u{1}RULES_NOT_SATISFIED\0\u{1}DESCRIPTION_MODERATED\0")
 }
 
 extension Flipcash_Chat_V1_JoinChatRequest: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
@@ -2934,7 +2984,7 @@ extension Flipcash_Chat_V1_LeaveChatResponse.Result: SwiftProtobuf._ProtoNamePro
 
 extension Flipcash_Chat_V1_EditChatRequest: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = _protobuf_package + ".EditChatRequest"
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}chat_id\0\u{1}title\0\u{1}picture\0\u{2}\u{7}auth\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}chat_id\0\u{1}title\0\u{1}picture\0\u{1}description\0\u{2}\u{6}auth\0")
 
   public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
     while let fieldNumber = try decoder.nextFieldNumber() {
@@ -2945,6 +2995,7 @@ extension Flipcash_Chat_V1_EditChatRequest: SwiftProtobuf.Message, SwiftProtobuf
       case 1: try { try decoder.decodeSingularMessageField(value: &self._chatID) }()
       case 2: try { try decoder.decodeSingularMessageField(value: &self._title) }()
       case 3: try { try decoder.decodeSingularMessageField(value: &self._picture) }()
+      case 4: try { try decoder.decodeSingularMessageField(value: &self._description_p) }()
       case 10: try { try decoder.decodeSingularMessageField(value: &self._auth) }()
       default: break
       }
@@ -2965,6 +3016,9 @@ extension Flipcash_Chat_V1_EditChatRequest: SwiftProtobuf.Message, SwiftProtobuf
     try { if let v = self._picture {
       try visitor.visitSingularMessageField(value: v, fieldNumber: 3)
     } }()
+    try { if let v = self._description_p {
+      try visitor.visitSingularMessageField(value: v, fieldNumber: 4)
+    } }()
     try { if let v = self._auth {
       try visitor.visitSingularMessageField(value: v, fieldNumber: 10)
     } }()
@@ -2975,6 +3029,7 @@ extension Flipcash_Chat_V1_EditChatRequest: SwiftProtobuf.Message, SwiftProtobuf
     if lhs._chatID != rhs._chatID {return false}
     if lhs._title != rhs._title {return false}
     if lhs._picture != rhs._picture {return false}
+    if lhs._description_p != rhs._description_p {return false}
     if lhs._auth != rhs._auth {return false}
     if lhs.unknownFields != rhs.unknownFields {return false}
     return true
@@ -3045,6 +3100,36 @@ extension Flipcash_Chat_V1_EditChatRequest.Picture: SwiftProtobuf.Message, Swift
   }
 }
 
+extension Flipcash_Chat_V1_EditChatRequest.Description: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
+  public static let protoMessageName: String = Flipcash_Chat_V1_EditChatRequest.protoMessageName + ".Description"
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}value\0")
+
+  public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
+    while let fieldNumber = try decoder.nextFieldNumber() {
+      // The use of inline closures is to circumvent an issue where the compiler
+      // allocates stack space for every case branch when no optimizations are
+      // enabled. https://github.com/apple/swift-protobuf/issues/1034
+      switch fieldNumber {
+      case 1: try { try decoder.decodeSingularStringField(value: &self.value) }()
+      default: break
+      }
+    }
+  }
+
+  public func traverse<V: SwiftProtobuf.Visitor>(visitor: inout V) throws {
+    if !self.value.isEmpty {
+      try visitor.visitSingularStringField(value: self.value, fieldNumber: 1)
+    }
+    try unknownFields.traverse(visitor: &visitor)
+  }
+
+  public static func ==(lhs: Flipcash_Chat_V1_EditChatRequest.Description, rhs: Flipcash_Chat_V1_EditChatRequest.Description) -> Bool {
+    if lhs.value != rhs.value {return false}
+    if lhs.unknownFields != rhs.unknownFields {return false}
+    return true
+  }
+}
+
 extension Flipcash_Chat_V1_EditChatResponse: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = _protobuf_package + ".EditChatResponse"
   public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{1}result\0\u{1}chat\0\u{3}flagged_category\0")
@@ -3090,7 +3175,7 @@ extension Flipcash_Chat_V1_EditChatResponse: SwiftProtobuf.Message, SwiftProtobu
 }
 
 extension Flipcash_Chat_V1_EditChatResponse.Result: SwiftProtobuf._ProtoNameProviding {
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{2}\0OK\0\u{1}DENIED\0\u{1}NOT_FOUND\0\u{1}TITLE_MODERATED\0\u{1}PICTURE_BLOB_NOT_ACCEPTED\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{2}\0OK\0\u{1}DENIED\0\u{1}NOT_FOUND\0\u{1}TITLE_MODERATED\0\u{1}PICTURE_BLOB_NOT_ACCEPTED\0\u{1}DESCRIPTION_MODERATED\0")
 }
 
 extension Flipcash_Chat_V1_MuteChatRequest: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
diff --git a/Sources/Flipcash2ClientProtocol/chat_v1_model.pb.swift b/Sources/Flipcash2ClientProtocol/chat_v1_model.pb.swift
index b8df97e..c050f41 100644
--- a/Sources/Flipcash2ClientProtocol/chat_v1_model.pb.swift
+++ b/Sources/Flipcash2ClientProtocol/chat_v1_model.pb.swift
@@ -225,6 +225,17 @@ public struct Flipcash_Chat_V1_Metadata: @unchecked Sendable {
     set {_uniqueStorage()._inLobby = newValue}
   }
 
+  /// A short free-form description of this chat, written by its creator.
+  /// Only supported for group chats. Empty when none is set. Part of the
+  /// group's record, like title, so it is returned to every viewer who can
+  /// see the chat, including in its public view.
+  ///
+  /// Set it on creation (see StartChatRequest) or with Chat.EditChat.
+  public var description_p: String {
+    get {return _storage._description_p}
+    set {_uniqueStorage()._description_p = newValue}
+  }
+
   /// Whether messages in this chat are end-to-end encrypted (see
   /// messaging.v1.EncryptedContent). Only supported for DMs (CONTACT_DM or DM);
   /// always false for group chats. A private group is always end-to-end
@@ -628,6 +639,14 @@ public struct Flipcash_Chat_V1_MetadataUpdate: Sendable {
     set {kind = .pictureChanged(newValue)}
   }
 
+  public var descriptionChanged: Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged {
+    get {
+      if case .descriptionChanged(let v)? = kind {return v}
+      return Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged()
+    }
+    set {kind = .descriptionChanged(newValue)}
+  }
+
   public var unknownFields = SwiftProtobuf.UnknownStorage()
 
   public enum OneOf_Kind: Equatable, Sendable {
@@ -636,6 +655,7 @@ public struct Flipcash_Chat_V1_MetadataUpdate: Sendable {
     case viewerStateChanged(Flipcash_Chat_V1_MetadataUpdate.ViewerStateChanged)
     case titleChanged(Flipcash_Chat_V1_MetadataUpdate.TitleChanged)
     case pictureChanged(Flipcash_Chat_V1_MetadataUpdate.PictureChanged)
+    case descriptionChanged(Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged)
 
   }
 
@@ -749,6 +769,24 @@ public struct Flipcash_Chat_V1_MetadataUpdate: Sendable {
     fileprivate var _newPicture: Flipcash_Blob_V1_Media? = nil
   }
 
+  /// The chat's description has changed (e.g. via Chat.EditChat). Delivered
+  /// to the chat's members, including the editor's other devices.
+  /// Best-effort and applied as received; a client that suspects a miss
+  /// refetches the chat via Chat.GetChat.
+  public struct DescriptionChanged: Sendable {
+    // SwiftProtobuf.Message conformance is added in an extension below. See the
+    // `Message` and `Message+*Additions` files in the SwiftProtobuf library for
+    // methods supported on all messages.
+
+    /// The new description, replacing Metadata.description. Empty when the
+    /// description was cleared.
+    public var newDescription: String = String()
+
+    public var unknownFields = SwiftProtobuf.UnknownStorage()
+
+    public init() {}
+  }
+
   public init() {}
 }
 
@@ -1389,7 +1427,7 @@ extension Flipcash_Chat_V1_ChatType: SwiftProtobuf._ProtoNameProviding {
 
 extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = _protobuf_package + ".Metadata"
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}chat_id\0\u{1}type\0\u{1}members\0\u{3}last_message\0\u{3}last_activity\0\u{3}latest_event_sequence\0\u{3}is_hidden\0\u{1}title\0\u{1}picture\0\u{3}roster_summary\0\u{1}rules\0\u{3}viewer_state\0\u{1}creator\0\u{3}is_private\0\u{3}in_lobby\0\u{4}U\u{1}use_e2ee\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}chat_id\0\u{1}type\0\u{1}members\0\u{3}last_message\0\u{3}last_activity\0\u{3}latest_event_sequence\0\u{3}is_hidden\0\u{1}title\0\u{1}picture\0\u{3}roster_summary\0\u{1}rules\0\u{3}viewer_state\0\u{1}creator\0\u{3}is_private\0\u{3}in_lobby\0\u{1}description\0\u{4}T\u{1}use_e2ee\0")
 
   fileprivate class _StorageClass {
     var _chatID: Flipcash_Common_V1_ChatId? = nil
@@ -1407,6 +1445,7 @@ extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._Messa
     var _creator: Flipcash_Common_V1_UserId? = nil
     var _isPrivate: Bool = false
     var _inLobby: Bool = false
+    var _description_p: String = String()
     var _useE2Ee: Bool = false
 
       // This property is used as the initial default value for new instances of the type.
@@ -1433,6 +1472,7 @@ extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._Messa
       _creator = source._creator
       _isPrivate = source._isPrivate
       _inLobby = source._inLobby
+      _description_p = source._description_p
       _useE2Ee = source._useE2Ee
     }
   }
@@ -1467,6 +1507,7 @@ extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._Messa
         case 13: try { try decoder.decodeSingularMessageField(value: &_storage._creator) }()
         case 14: try { try decoder.decodeSingularBoolField(value: &_storage._isPrivate) }()
         case 15: try { try decoder.decodeSingularBoolField(value: &_storage._inLobby) }()
+        case 16: try { try decoder.decodeSingularStringField(value: &_storage._description_p) }()
         case 100: try { try decoder.decodeSingularBoolField(value: &_storage._useE2Ee) }()
         default: break
         }
@@ -1525,6 +1566,9 @@ extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._Messa
       if _storage._inLobby != false {
         try visitor.visitSingularBoolField(value: _storage._inLobby, fieldNumber: 15)
       }
+      if !_storage._description_p.isEmpty {
+        try visitor.visitSingularStringField(value: _storage._description_p, fieldNumber: 16)
+      }
       if _storage._useE2Ee != false {
         try visitor.visitSingularBoolField(value: _storage._useE2Ee, fieldNumber: 100)
       }
@@ -1552,6 +1596,7 @@ extension Flipcash_Chat_V1_Metadata: SwiftProtobuf.Message, SwiftProtobuf._Messa
         if _storage._creator != rhs_storage._creator {return false}
         if _storage._isPrivate != rhs_storage._isPrivate {return false}
         if _storage._inLobby != rhs_storage._inLobby {return false}
+        if _storage._description_p != rhs_storage._description_p {return false}
         if _storage._useE2Ee != rhs_storage._useE2Ee {return false}
         return true
       }
@@ -2073,7 +2118,7 @@ extension Flipcash_Chat_V1_RosterSummary: SwiftProtobuf.Message, SwiftProtobuf._
 
 extension Flipcash_Chat_V1_MetadataUpdate: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = _protobuf_package + ".MetadataUpdate"
-  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}full_refresh\0\u{3}last_activity_changed\0\u{3}viewer_state_changed\0\u{3}title_changed\0\u{3}picture_changed\0")
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}full_refresh\0\u{3}last_activity_changed\0\u{3}viewer_state_changed\0\u{3}title_changed\0\u{3}picture_changed\0\u{3}description_changed\0")
 
   public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
     while let fieldNumber = try decoder.nextFieldNumber() {
@@ -2146,6 +2191,19 @@ extension Flipcash_Chat_V1_MetadataUpdate: SwiftProtobuf.Message, SwiftProtobuf.
           self.kind = .pictureChanged(v)
         }
       }()
+      case 6: try {
+        var v: Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged?
+        var hadOneofValue = false
+        if let current = self.kind {
+          hadOneofValue = true
+          if case .descriptionChanged(let m) = current {v = m}
+        }
+        try decoder.decodeSingularMessageField(value: &v)
+        if let v = v {
+          if hadOneofValue {try decoder.handleConflictingOneOf()}
+          self.kind = .descriptionChanged(v)
+        }
+      }()
       default: break
       }
     }
@@ -2177,6 +2235,10 @@ extension Flipcash_Chat_V1_MetadataUpdate: SwiftProtobuf.Message, SwiftProtobuf.
       guard case .pictureChanged(let v)? = self.kind else { preconditionFailure() }
       try visitor.visitSingularMessageField(value: v, fieldNumber: 5)
     }()
+    case .descriptionChanged?: try {
+      guard case .descriptionChanged(let v)? = self.kind else { preconditionFailure() }
+      try visitor.visitSingularMessageField(value: v, fieldNumber: 6)
+    }()
     case nil: break
     }
     try unknownFields.traverse(visitor: &visitor)
@@ -2355,6 +2417,36 @@ extension Flipcash_Chat_V1_MetadataUpdate.PictureChanged: SwiftProtobuf.Message,
   }
 }
 
+extension Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
+  public static let protoMessageName: String = Flipcash_Chat_V1_MetadataUpdate.protoMessageName + ".DescriptionChanged"
+  public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}new_description\0")
+
+  public mutating func decodeMessage<D: SwiftProtobuf.Decoder>(decoder: inout D) throws {
+    while let fieldNumber = try decoder.nextFieldNumber() {
+      // The use of inline closures is to circumvent an issue where the compiler
+      // allocates stack space for every case branch when no optimizations are
+      // enabled. https://github.com/apple/swift-protobuf/issues/1034
+      switch fieldNumber {
+      case 1: try { try decoder.decodeSingularStringField(value: &self.newDescription) }()
+      default: break
+      }
+    }
+  }
+
+  public func traverse<V: SwiftProtobuf.Visitor>(visitor: inout V) throws {
+    if !self.newDescription.isEmpty {
+      try visitor.visitSingularStringField(value: self.newDescription, fieldNumber: 1)
+    }
+    try unknownFields.traverse(visitor: &visitor)
+  }
+
+  public static func ==(lhs: Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged, rhs: Flipcash_Chat_V1_MetadataUpdate.DescriptionChanged) -> Bool {
+    if lhs.newDescription != rhs.newDescription {return false}
+    if lhs.unknownFields != rhs.unknownFields {return false}
+    return true
+  }
+}
+
 extension Flipcash_Chat_V1_RosterUpdate: SwiftProtobuf.Message, SwiftProtobuf._MessageImplementationBase, SwiftProtobuf._ProtoNameProviding {
   public static let protoMessageName: String = _protobuf_package + ".RosterUpdate"
   public static let _protobuf_nameMap = SwiftProtobuf._NameMap(bytecode: "\0\u{3}member_joined\0\u{3}member_left\0\u{4}\u{8}roster_summary\0")
diff --git a/flipcash2.lock b/flipcash2.lock
index c32ab57..cae8c20 100644
--- a/flipcash2.lock
+++ b/flipcash2.lock
@@ -1,4 +1,4 @@
 # Pinned upstream contract. Regenerate with scripts/sync-protos.sh <sha>.
 upstream: code-payments/flipcash2-protobuf-api
-commit: ec66e6b12c59d7eae3281341e74fe8853c90a306
-subject: Add support for bios and cover pictures for user profiles (#133)
+commit: 3bb442d359dd8452b4e3eca5f5c1ca463e7f5a4b
+subject: Add support for group descriptions (#134)
diff --git a/proto/chat/v1/chat_service.proto b/proto/chat/v1/chat_service.proto
index 3f058c3..7bddc6e 100644
--- a/proto/chat/v1/chat_service.proto
+++ b/proto/chat/v1/chat_service.proto
@@ -153,8 +153,8 @@ service Chat {
     //
     // Only a group chat may be edited, and only by a member the server permits
     // to edit it, as reported by ViewerState.Permissions.can_edit; anyone else
-    // is DENIED. A new title is moderated like
-    // StartChat's. A new picture is a blob the caller has already uploaded via
+    // is DENIED. A new title or description is moderated like StartChat's. A
+    // new picture is a blob the caller has already uploaded via
     // BlobStorage: the client uploads only the ORIGINAL and passes the
     // resulting BlobId once the blob is READY, and the server derives the
     // remaining renditions. Setting a field to the value the chat already has
@@ -163,7 +163,8 @@ service Chat {
     //
     // Every real change reaches the chat's members, including the caller's
     // other devices, on the event stream as one MetadataUpdate per field
-    // changed: TitleChanged for the title, PictureChanged for the picture.
+    // changed: TitleChanged for the title, PictureChanged for the picture,
+    // DescriptionChanged for the description.
     rpc EditChat(EditChatRequest) returns (EditChatResponse);
 
     // MuteChat mutes a chat for the caller, until a time or indefinitely.
@@ -298,11 +299,11 @@ message GetChatRequest {
     // What the client intends to render of the chat's messaging state — its
     // last_message and latest_event_sequence — and so whether they may be
     // returned redacted (see messaging.v1.ViewMode). A group's record (title,
-    // picture, rules, roster summary) is returned to every registered user
-    // whatever the mode; the mode decides only the messaging state, which is
-    // withheld from a viewer who may not read the chat under it. Unset (FULL)
-    // is the pre-redaction contract: messaging state for a viewer who may
-    // read the chat in full, the bare record for anyone else.
+    // description, picture, rules, roster summary) is returned to every
+    // registered user whatever the mode; the mode decides only the messaging
+    // state, which is withheld from a viewer who may not read the chat under
+    // it. Unset (FULL) is the pre-redaction contract: messaging state for a
+    // viewer who may read the chat in full, the bare record for anyone else.
     //
     // Must be REDACTED when auth is unset; any other mode is DENIED.
     messaging.v1.ViewMode view_mode = 2 [(validate.rules).enum = {
@@ -521,6 +522,12 @@ message StartChatRequest {
         // chat has no participation requirements. Caller must satisfy the rules
         // in order for the chat to be started.
         Rules rules = 3;
+
+        // Description for the chat. Optional; empty sets none. Moderated like
+        // the title.
+        string description = 4 [(validate.rules).string = {
+            max_len: 160
+        }];
     }
 
     // Parameters for creating a private group chat (see Metadata.is_private):
@@ -554,6 +561,12 @@ message StartChatRequest {
         // The blob holding the ORIGINAL picture the caller uploaded. Optional.
         // If set, it must be owned by the caller and READY.
         blob.v1.BlobId picture = 2;
+
+        // Description for the chat. Optional; empty sets none. Moderated like
+        // the title.
+        string description = 3 [(validate.rules).string = {
+            max_len: 160
+        }];
     }
 
     // Key for retrying this request safely. A retry with the same key from the
@@ -573,6 +586,7 @@ message StartChatResponse {
         PICTURE_BLOB_NOT_ACCEPTED = 3;
         INVALID_RULES             = 4;
         RULES_NOT_SATISFIED       = 5;
+        DESCRIPTION_MODERATED     = 6;
     }
 
     // The metadata for the newly created chat, including the server-generated
@@ -581,8 +595,8 @@ message StartChatResponse {
     Metadata chat = 2;
 
     // The best-fit category that tripped moderation, mirroring the Moderation
-    // service's vocabulary. Set only when result == TITLE_MODERATED; NONE
-    // otherwise.
+    // service's vocabulary. Set only when result == TITLE_MODERATED or
+    // DESCRIPTION_MODERATED; NONE otherwise.
     moderation.v1.FlaggedCategory flagged_category = 3;
 }
 
@@ -630,6 +644,9 @@ message EditChatRequest {
     // The new picture. Left unchanged when unset.
     Picture picture = 3;
 
+    // The new description. Left unchanged when unset.
+    Description description = 4;
+
     message Title {
         string value = 1 [(validate.rules).string = {
             min_len: 1
@@ -644,6 +661,13 @@ message EditChatRequest {
         blob.v1.BlobId blob_id = 1 [(validate.rules).message.required = true];
     }
 
+    message Description {
+        // The new description. Empty clears it.
+        string value = 1 [(validate.rules).string = {
+            max_len: 160
+        }];
+    }
+
     common.v1.Auth auth = 10 [(validate.rules).message.required = true];
 }
 
@@ -655,6 +679,7 @@ message EditChatResponse {
         NOT_FOUND                 = 2;
         TITLE_MODERATED           = 3;
         PICTURE_BLOB_NOT_ACCEPTED = 4;
+        DESCRIPTION_MODERATED     = 5;
     }
 
     // The metadata for the chat after the edit, as seen by the caller,
@@ -663,8 +688,8 @@ message EditChatResponse {
     Metadata chat = 2;
 
     // The best-fit category that tripped moderation, mirroring the Moderation
-    // service's vocabulary. Set only when result == TITLE_MODERATED; NONE
-    // otherwise.
+    // service's vocabulary. Set only when result == TITLE_MODERATED or
+    // DESCRIPTION_MODERATED; NONE otherwise.
     moderation.v1.FlaggedCategory flagged_category = 3;
 }
 
diff --git a/proto/chat/v1/model.proto b/proto/chat/v1/model.proto
index 533c4ce..b9fd1e9 100644
--- a/proto/chat/v1/model.proto
+++ b/proto/chat/v1/model.proto
@@ -106,6 +106,16 @@ message Metadata {
     // group.
     bool in_lobby = 15;
 
+    // A short free-form description of this chat, written by its creator.
+    // Only supported for group chats. Empty when none is set. Part of the
+    // group's record, like title, so it is returned to every viewer who can
+    // see the chat, including in its public view.
+    //
+    // Set it on creation (see StartChatRequest) or with Chat.EditChat.
+    string description = 16 [(validate.rules).string = {
+        max_len: 160
+    }];
+
     // Whether messages in this chat are end-to-end encrypted (see
     // messaging.v1.EncryptedContent). Only supported for DMs (CONTACT_DM or DM);
     // always false for group chats. A private group is always end-to-end
@@ -293,6 +303,7 @@ message MetadataUpdate {
         ViewerStateChanged  viewer_state_changed  = 3;
         TitleChanged        title_changed         = 4;
         PictureChanged      picture_changed       = 5;
+        DescriptionChanged  description_changed   = 6;
     }
 
     // Refreshes the entire chat metadata
@@ -331,6 +342,18 @@ message MetadataUpdate {
         // Metadata.picture.
         blob.v1.Media new_picture = 1 [(validate.rules).message.required = true];
     }
+
+    // The chat's description has changed (e.g. via Chat.EditChat). Delivered
+    // to the chat's members, including the editor's other devices.
+    // Best-effort and applied as received; a client that suspects a miss
+    // refetches the chat via Chat.GetChat.
+    message DescriptionChanged {
+        // The new description, replacing Metadata.description. Empty when the
+        // description was cleared.
+        string new_description = 1 [(validate.rules).string = {
+            max_len: 160
+        }];
+    }
 }
 
 // RosterUpdate is a best-effort, real-time change to a chat's roster — a