Replace better-sqlite3 with built-in SQLite drivers

tests/bun-runtime.test.ts

@@ -0,0 +1,43 @@
+import { execFile } from 'node:child_process';
+import { promisify } from 'node:util';
+
+import { describe, expect, it } from 'vitest';
+
+const execFileAsync = promisify(execFile);
+
+describe('Bun runtime compatibility', () => {
+  it('connects to sqlite from the package in Bun', async () => {
+    const script = [
+      "import { IdentityDB } from './src/index.ts';",
+      "const db = await IdentityDB.connect({ client: 'sqlite', filename: ':memory:' });",
+      'await db.initialize();',
+      "console.log('bun-sqlite-ok');",
+      'await db.close();',
+    ].join('\n');
+
+    const result = await execFileAsync('bun', ['--eval', script], {
+      cwd: process.cwd(),
+    });
+
+    expect(result.stdout).toContain('bun-sqlite-ok');
+  });
+
+  it('supports writes and reads through the Bun sqlite adapter path', async () => {
+    const script = [
+      "import { IdentityDB } from './src/index.ts';",
+      "const db = await IdentityDB.connect({ client: 'sqlite', filename: ':memory:' });",
+      'await db.initialize();',
+      "await db.addFact({ statement: 'Bun supports sqlite.', topics: [{ name: 'Bun', category: 'entity', granularity: 'concrete' }, { name: 'sqlite', category: 'concept', granularity: 'concrete' }] });",
+      "const facts = await db.getTopicFacts('Bun');",
+      "if (facts.length !== 1 || facts[0]?.statement !== 'Bun supports sqlite.') throw new Error('bun sqlite CRUD failed');",
+      "console.log('bun-sqlite-crud-ok');",
+      'await db.close();',
+    ].join('\n');
+
+    const result = await execFileAsync('bun', ['--eval', script], {
+      cwd: process.cwd(),
+    });
+
+    expect(result.stdout).toContain('bun-sqlite-crud-ok');
+  });
+});