From 620d9cc70fe7e5b4099f7cebcfc656340e593837 Mon Sep 17 00:00:00 2001
From: Evan Reichard <evan@reichard.io>
Date: Thu, 30 Apr 2026 11:10:36 -0400
Subject: [PATCH] feat: warm-start LSP server on file read

---
 index.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/index.ts b/index.ts
index 89fd4af..48b6c6b 100644
--- a/index.ts
+++ b/index.ts
@@ -432,6 +432,25 @@ export default function (pi: ExtensionAPI) {
     default: true,
   });
 
+  // Background Init on Read - Fire-and-forget LSP initialization when the
+  // LLM reads a file with a supported extension. Doesn't block the read,
+  // just ensures the server is warm by the time an LSP tool is called.
+  pi.on("tool_result", async (event, ctx) => {
+    if (event.toolName !== "read" || event.isError) return;
+
+    const filePath = event.input?.path;
+    if (!filePath || typeof filePath !== "string") return;
+
+    try {
+      const absolutePath = path.resolve(ctx.cwd, filePath);
+      // daemonDiagnostics triggers getOrCreateEntry + syncFile in the daemon.
+      // We don't await it — just fire and forget so the server starts warming up.
+      void daemonDiagnostics(absolutePath);
+    } catch {
+      // Silently ignore — unsupported file type, missing binary, etc.
+    }
+  });
+
   // Auto-Check After Edit/Write - Run diagnostics automatically
   pi.on("tool_result", async (event, ctx) => {
     // Check Enabled