hive-matrix-mcp: add send_redact tool to delete matrix events

hive-matrix-mcp/src/handlers.rs

@@ -6,8 +6,8 @@
 //!
 //! Tool surface mirrors damocles-daemon's v0 set per the operator's call:
 //! `send_message`, `send_dm`, `send_reaction`, `send_reply`, `mark_read`,
-//! `list_rooms`, `list_room_members`, `read_room`. Plus a `ping` for the
-//! MCP bridge's liveness probe.
+//! `send_redact`, `list_rooms`, `list_room_members`, `read_room`. Plus a
+//! `ping` for the MCP bridge's liveness probe.
 
 use matrix_sdk::{
     Client,
@@ -407,6 +407,32 @@ pub async fn mark_read(client: &Client, room_ref: &str, event_id: &str) -> Daemo
     }
 }
 
+pub async fn send_redact(
+    client: &Client,
+    room_ref: &str,
+    event_id: &str,
+    reason: Option<&str>,
+) -> DaemonResponse {
+    let room = match resolve_room(client, room_ref).await {
+        Ok(r) => r,
+        Err(e) => return e,
+    };
+    let eid: OwnedEventId = match event_id.parse() {
+        Ok(e) => e,
+        Err(e) => return DaemonResponse::error(format!("invalid event_id {event_id}: {e}")),
+    };
+    // Redaction is irreversible: the homeserver drops the event content and
+    // keeps only the shell + reason. A fresh txn id (None) is fine — this is
+    // a one-shot operator/agent action, not a retried send.
+    match room.redact(&eid, reason, None).await {
+        Ok(resp) => DaemonResponse::ok(&serde_json::json!({
+            "event_id": resp.event_id.to_string(),
+            "target": eid.to_string(),
+        })),
+        Err(e) => DaemonResponse::error(format!("redact {eid}: {e}")),
+    }
+}
+
 pub async fn list_rooms(client: &Client) -> DaemonResponse {
     let mut rooms = Vec::new();
     for room in client.joined_rooms() {