fix(watcher): close deleted open documents

src/client.ts

@@ -247,6 +247,14 @@ export class LspClient {
     return uri;
   }
 
+  closeDocument(uri: string): void {
+    this.versions.delete(uri);
+    this.diagnostics.delete(uri);
+    this.conn.sendNotification("textDocument/didClose", {
+      textDocument: { uri },
+    });
+  }
+
   // Send Raw LSP Request - Passthrough used by the command dispatcher.
   sendRequest<R = unknown>(method: string, params: unknown): Promise<R> {
     return this.conn.sendRequest(method, params) as Promise<R>;

src/daemon.ts

@@ -20,6 +20,7 @@ import {
 
 const DEFAULT_IDLE_TTL_MS = 5 * 60 * 1000;
 const WATCHER_READY_TIMEOUT_MS = 5000;
+const FILE_CHANGE_DELETED = 3;
 
 // Client Entry - One LspClient per (server.id, rootDir), plus the bookkeeping
 // needed to keep files in sync and evict on idleness.
@@ -152,6 +153,11 @@ async function waitForWatcherReady(entry: ClientEntry): Promise<void> {
 
 function forwardEvents(entry: ClientEntry, events: FileEvent[]): void {
   try {
+    for (const event of events) {
+      if (event.type !== FILE_CHANGE_DELETED || !entry.opened.has(event.uri)) continue;
+      entry.client.closeDocument(event.uri);
+      entry.opened.delete(event.uri);
+    }
     if (process.env.LSP_DEBUG) {
       log(`watcher fire`, entry.server.id, JSON.stringify(events));
     }