diff --git a/gitnexus/src/core/lbug/lbug-adapter.ts b/gitnexus/src/core/lbug/lbug-adapter.ts
index 7d17ab028..6973a4cbe 100644
--- a/gitnexus/src/core/lbug/lbug-adapter.ts
+++ b/gitnexus/src/core/lbug/lbug-adapter.ts
@@ -188,12 +188,6 @@ const DB_LOCK_RETRY_ATTEMPTS = 3;
 /** Base back-off in ms between BUSY retries (multiplied by attempt number). */
 const DB_LOCK_RETRY_DELAY_MS = 500;
 
-/**
- * Re-exported from `lbug-config.ts` (single source of truth) so existing
- * importers continue to resolve `isDbBusyError` from this module.
- */
-export { isDbBusyError };
-
 /**
  * Return true when the error message indicates a write was attempted against
  * a read-only LadybugDB connection. The MCP query pool opens DBs read-only,
diff --git a/gitnexus/src/core/lbug/lbug-config.ts b/gitnexus/src/core/lbug/lbug-config.ts
index 8d6987c89..35c59851c 100644
--- a/gitnexus/src/core/lbug/lbug-config.ts
+++ b/gitnexus/src/core/lbug/lbug-config.ts
@@ -62,11 +62,10 @@ export interface LbugConnectionHandle {
  * (`new lbug.Database(...)` raises from `local_file_system.cpp`) or during
  * a query (another writer holds the exclusive lock).
  *
- * Source of truth lives here so both the construction-time retry
- * (`openWithLockRetry`) and the query-time retry (`withLbugDb` in
- * `lbug-adapter.ts`) agree on the matcher. Other matchers (e.g.
- * `isReadOnlyDbError`) should follow this pattern: define here, re-export
- * from the adapter — see `references/findings-schema.json` adv-1 / maint-4.
+ * Lives here (not in `lbug-adapter.ts`) so both the construction-time
+ * retry (`openWithLockRetry` in this file) and the query-time retry
+ * (`withLbugDb` in `lbug-adapter.ts`) consult the same matcher. Callers
+ * import directly from this module — no re-export to keep in sync.
  */
 export const isDbBusyError = (err: unknown): boolean => {
   const msg = (err instanceof Error ? err.message : String(err)).toLowerCase();
diff --git a/gitnexus/test/integration/lbug-lock-retry.test.ts b/gitnexus/test/integration/lbug-lock-retry.test.ts
index 1279c77fb..7724e5512 100644
--- a/gitnexus/test/integration/lbug-lock-retry.test.ts
+++ b/gitnexus/test/integration/lbug-lock-retry.test.ts
@@ -14,7 +14,7 @@ import { withTestLbugDB } from '../helpers/test-indexed-db.js';
 
 // Pure-function tests — no DB needed, but grouped here for cohesion
 // with the retry logic they guard.
-import { isDbBusyError } from '../../src/core/lbug/lbug-adapter.js';
+import { isDbBusyError } from '../../src/core/lbug/lbug-config.js';
 
 describe('isDbBusyError', () => {
   it('returns true for "busy" errors (case-insensitive)', () => {
diff --git a/gitnexus/test/integration/lbug-open-retry.test.ts b/gitnexus/test/integration/lbug-open-retry.test.ts
index a65ac0497..80e68617d 100644
--- a/gitnexus/test/integration/lbug-open-retry.test.ts
+++ b/gitnexus/test/integration/lbug-open-retry.test.ts
@@ -20,7 +20,6 @@ import {
   openLbugConnection,
   waitForWindowsHandleRelease,
 } from '../../src/core/lbug/lbug-config.js';
-import * as adapterReexport from '../../src/core/lbug/lbug-adapter.js';
 
 // ─── Minimal stub of the `lbug` module surface used by openLbugConnection ──
 
@@ -51,10 +50,7 @@ const makeStubLbug = (control: StubModuleControl) => {
   return { Database: FakeDatabase, Connection: FakeConnection } as any;
 };
 
-describe('isDbBusyError (re-exported source of truth)', () => {
-  it('matcher in lbug-adapter is the same function as in lbug-config', () => {
-    expect(adapterReexport.isDbBusyError).toBe(isDbBusyError);
-  });
+describe('isDbBusyError', () => {
   it('matches the documented Windows lock-error wording', () => {
     expect(isDbBusyError(new Error('Could not set lock on file foo.lbug'))).toBe(true);
     expect(isDbBusyError(new Error('database is locked'))).toBe(true);