fix: proxy auto-relaunches server + keepalive ping

- Proxy retries with ensureServer() on ECONNREFUSED/ECONNRESET
- Keepalive ping every 2 minutes prevents idle shutdown during active sessions
- Removed session-store.db mtime check (keepalive supersedes it)
- Bumped to v1.2.1

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: BrainSlugs83

index.js

@@ -147,6 +147,33 @@ function callServer(path, body) {
   });
 }
 
+// Auto-relaunch wrapper: retries once after ensureServer on connection failure
+async function callServerWithRetry(path, body) {
+  try {
+    return await callServer(path, body);
+  } catch (err) {
+    if (err.message && (err.message.includes("ECONNREFUSED") || err.message.includes("ECONNRESET"))) {
+      startupError = null;
+      await ensureServer();
+      return await callServer(path, body);
+    }
+    throw err;
+  }
+}
+
+// --- Keepalive: ping server every 2 minutes to prevent idle shutdown ---
+const KEEPALIVE_MS = 2 * 60_000;
+setInterval(async () => {
+  try {
+    const result = await ping();
+    if (!result) {
+      // Server died — relaunch it
+      startupError = null;
+      await ensureServer();
+    }
+  } catch {}
+}, KEEPALIVE_MS);
+
 // --- Start: ensure server, then expose MCP tools ---
 
 let startupError = null;
@@ -180,7 +207,7 @@ server.tool(
       return { content: [{ type: "text", text: `⚠ vector-memory misconfigured: ${startupError}` }] };
     }
     try {
-      const results = await callServer("/search", { query, limit });
+      const results = await callServerWithRetry("/search", { query, limit });
 
       if (results.error) {
         return { content: [{ type: "text", text: `Error: ${results.error}` }] };
@@ -213,7 +240,7 @@ server.tool(
       return { content: [{ type: "text", text: `⚠ vector-memory misconfigured: ${startupError}` }] };
     }
     try {
-      const result = await callServer("/reindex", {});
+      const result = await callServerWithRetry("/reindex", {});
       if (result.error) {
         return { content: [{ type: "text", text: `Error: ${result.error}` }] };
       }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vector-memory-mcp",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Semantic vector search MCP server for GitHub Copilot CLI session history",
   "main": "index.js",
   "type": "module",

vector-memory-server.js

@@ -3,7 +3,7 @@ import * as sqliteVec from "sqlite-vec";
 import { Worker } from "worker_threads";
 import { join, dirname } from "path";
 import { homedir } from "os";
-import { existsSync, writeFileSync, unlinkSync, readFileSync, statSync } from "fs";
+import { existsSync, writeFileSync, unlinkSync, readFileSync } from "fs";
 import { fileURLToPath } from "url";
 import { createServer, request as httpReq } from "http";
 import { execSync } from "child_process";
@@ -341,11 +341,6 @@ setInterval(backgroundIndex, INDEX_INTERVAL_MS);
 // --- Idle shutdown ---
 if (IDLE_TIMEOUT_MS > 0) {
   setInterval(() => {
-    // If session-store.db was recently modified, count as activity
-    try {
-      const mtime = statSync(SESSION_STORE_PATH).mtimeMs;
-      if (mtime > lastActivity) lastActivity = mtime;
-    } catch {}
     const idle = Date.now() - lastActivity;
     if (idle >= IDLE_TIMEOUT_MS) {
       process.stderr.write(`[vector-memory] Idle for ${Math.round(idle / 1000)}s — shutting down.\n`);