diff --git a/src/db/migrate.ts b/src/db/migrate.ts
index 24f0d77..3a3370f 100644
--- a/src/db/migrate.ts
+++ b/src/db/migrate.ts
@@ -3,15 +3,51 @@ import { config } from '../env';
 import { getErrorMessage } from '../utils/file';
 import logger from '../utils/logger';
 
-const schemaSql = await Bun.file('schema.sql').text();
-const sql = postgres(config.databaseUrl, { max: 1 });
+/**
+ * Run raw SQL migration from schema.sql.
+ * Safe to call multiple times — all statements use IF NOT EXISTS.
+ */
+export const runMigration = async (): Promise<void> => {
+  // In compiled dist: import.meta.dir = .../dist/
+  // In source via bun --hot: import.meta.dir = .../src/db/
+  const dir = import.meta.dir || '';
+  const candidates = [
+    dir + '/../../schema.sql',  // from dist/
+    dir + '/../schema.sql',     // from src/ (bun --hot src/index.ts)
+    dir + '/../schema.sql',     // from src/db/ (bun --hot src/db/migrate.ts)
+    dir + '/schema.sql',        // from src/ (bun run db:migrate)
+  ];
 
-try {
-  await sql.unsafe(schemaSql);
-  logger.info('Database migration completed');
-} catch (error: unknown) {
-  logger.error('Database migration failed', { error: getErrorMessage(error) });
-  process.exitCode = 1;
-} finally {
-  await sql.end();
+  let schemaSql: string | null = null;
+  for (const p of candidates) {
+    const file = Bun.file(p);
+    const exists = await file.exists();
+    if (exists) {
+      schemaSql = await file.text();
+      break;
+    }
+  }
+
+  if (!schemaSql) {
+    logger.error('Migration failed: schema.sql not found (tried ' + candidates.join(', ') + ')');
+    process.exitCode = 1;
+    return;
+  }
+
+  const sql = postgres(config.databaseUrl, { max: 1 });
+
+  try {
+    await sql.unsafe(schemaSql);
+    logger.info('Database migration completed');
+  } catch (error: unknown) {
+    logger.error('Database migration failed', { error: getErrorMessage(error) });
+    process.exitCode = 1;
+  } finally {
+    await sql.end();
+  }
+};
+
+// When run directly: `bun src/db/migrate.ts` or `bun dist/migrate.js`
+if (import.meta.path === Bun.main) {
+  await runMigration();
 }
diff --git a/src/index.ts b/src/index.ts
index e7f1bee..799aa83 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -14,6 +14,22 @@ import logger from './utils/logger';
 import { metricsCollector } from './utils/metrics';
 import { cleanupRateLimitCache, withRateLimit } from './utils/rateLimit';
 
+// ─── Auto-run migration at startup ──────────────────────────────────────────
+try {
+  const { runMigration } = await import('./db/migrate');
+  await runMigration();
+} catch {
+  logger.warn('Auto-migration skipped (non-fatal)');
+}
+
+// ─── Auto-run migration at startup ───
+try {
+  await import('./db/migrate');
+} catch {
+  // migrate.ts calls process.exit(1) on failure — if it throws, log and continue
+  logger.warn('Auto-migration warning (non-fatal)');
+}
+
 const server = serve({
   port: config.port,
   routes: {