surface message edit history (no edit_message tool - shard commits to its words)

src/types.rs

@@ -6,6 +6,14 @@ use matrix_sdk::{
 };
 use serde::{Deserialize, Serialize};
 
+/// One prior version of an edited message.
+#[derive(Debug, Clone, Serialize)]
+pub struct EditRecord {
+    pub body: String,
+    pub ts: i64,
+    pub ts_human: String,
+}
+
 /// Serializable shape for one timeline event, used both in matrix_turn JSON
 /// (input to the shard) and tool response JSON (get_room_history,
 /// fetch_event).
@@ -22,6 +30,9 @@ pub enum WireEvent {
         body: String,
         in_reply_to: Option<String>,
         read_by: Vec<String>,
+        /// Prior versions of this message, oldest first. Empty when the
+        /// message has never been edited.
+        edit_history: Vec<EditRecord>,
     },
     Reaction {
         sender: String,
@@ -94,11 +105,16 @@ pub enum TimelineItem {
     Message {
         event_id: OwnedEventId,
         sender: OwnedUserId,
+        /// Latest version of the message body. If the user edited this message,
+        /// this is the most recent edit's content.
         body: String,
         is_self: bool,
         /// Unix seconds. 0 if unknown.
         ts: i64,
         in_reply_to: Option<OwnedEventId>,
+        /// Prior versions of this message (oldest first), excluding the
+        /// current `body`. Empty when the message has never been edited.
+        edit_history: Vec<EditRecord>,
     },
     Reaction {
         sender: OwnedUserId,