story-kit: merge 262_story_bot_error_notifications_for_story_failures

server/src/http/mcp.rs

@@ -1788,6 +1788,13 @@ fn tool_report_merge_failure(args: &Value, ctx: &AppContext) -> Result<String, S
     slog!("[mergemaster] Merge failure reported for '{story_id}': {reason}");
     ctx.agents.set_merge_failure_reported(story_id);
 
+    // Broadcast the failure so the Matrix notification listener can post an
+    // error message to configured rooms without coupling this tool to the bot.
+    let _ = ctx.watcher_tx.send(crate::io::watcher::WatcherEvent::MergeFailure {
+        story_id: story_id.to_string(),
+        reason: reason.to_string(),
+    });
+
     // Persist the failure reason to the story file's front matter so it
     // survives server restarts and is visible in the web UI.
     if let Ok(project_root) = ctx.state.get_project_root() {

server/src/http/ws.rs

@@ -150,6 +150,9 @@ impl From<WatcherEvent> for Option<WsResponse> {
             }),
             WatcherEvent::ConfigChanged => Some(WsResponse::AgentConfigChanged),
             WatcherEvent::AgentStateChanged => Some(WsResponse::AgentStateChanged),
+            // MergeFailure is handled by the Matrix notification listener only;
+            // no WebSocket message is needed for the frontend.
+            WatcherEvent::MergeFailure { .. } => None,
         }
     }
 }