diff --git a/packages/loopover-miner/lib/governor-ledger.js b/packages/loopover-miner/lib/governor-ledger.js
index 7620121acd..4b5ecd30b6 100644
--- a/packages/loopover-miner/lib/governor-ledger.js
+++ b/packages/loopover-miner/lib/governor-ledger.js
@@ -1,8 +1,7 @@
-import { chmodSync, mkdirSync } from "node:fs";
 import { homedir } from "node:os";
-import { dirname, join } from "node:path";
-import { DatabaseSync } from "node:sqlite";
+import { join } from "node:path";
 import { normalizeGovernorLedgerEvent } from "@loopover/engine";
+import { openLocalStoreDb } from "./local-store.js";
 import { applySchemaMigrations } from "./schema-version.js";
 import {
   GOVERNOR_LEDGER_PURGE_SPEC,
@@ -96,10 +95,7 @@ function rowToDecision(row) {
  */
 export function initGovernorLedger(dbPath = resolveGovernorLedgerDbPath()) {
   const resolvedPath = normalizeDbPath(dbPath);
-  mkdirSync(dirname(resolvedPath), { recursive: true, mode: 0o700 });
-  const db = new DatabaseSync(resolvedPath);
-  chmodSync(resolvedPath, 0o600);
-  db.exec("PRAGMA busy_timeout = 5000");
+  const db = openLocalStoreDb(resolvedPath);
   db.exec(`
     CREATE TABLE IF NOT EXISTS governor_events (
       id INTEGER PRIMARY KEY AUTOINCREMENT,
diff --git a/packages/loopover-miner/lib/plan-store.js b/packages/loopover-miner/lib/plan-store.js
index c5a23f8757..8d7a3be3fa 100644
--- a/packages/loopover-miner/lib/plan-store.js
+++ b/packages/loopover-miner/lib/plan-store.js
@@ -1,7 +1,6 @@
-import { chmodSync, mkdirSync } from "node:fs";
 import { homedir } from "node:os";
-import { dirname, join } from "node:path";
-import { DatabaseSync } from "node:sqlite";
+import { join } from "node:path";
+import { openLocalStoreDb } from "./local-store.js";
 import { applySchemaMigrations } from "./schema-version.js";
 
 // Local SQLite persistence for the stateless MCP plan DAG (#2318). `loopover_build_plan`/`plan_status`/
@@ -150,13 +149,9 @@ function rowToRecord(row) {
  */
 export function openPlanStore(dbPath = resolvePlanStoreDbPath()) {
   const resolvedPath = normalizeDbPath(dbPath);
-  // The store is a persistent local file; the special in-memory path (':memory:') has no file to create or chmod.
-  if (resolvedPath !== ":memory:") {
-    mkdirSync(dirname(resolvedPath), { recursive: true, mode: 0o700 });
-  }
-  const db = new DatabaseSync(resolvedPath);
-  if (resolvedPath !== ":memory:") chmodSync(resolvedPath, 0o600);
-  db.exec("PRAGMA busy_timeout = 5000");
+  // openLocalStoreDb centralizes the mkdir(0o700)/chmod(0o600)/busy_timeout + crash-safe cleanup registration and
+  // treats ':memory:' as a no-file special case, so this store no longer hand-rolls that boilerplate (#4826).
+  const db = openLocalStoreDb(resolvedPath);
   db.exec(`
     CREATE TABLE IF NOT EXISTS miner_plans (
       plan_id TEXT PRIMARY KEY,
diff --git a/packages/loopover-miner/lib/prediction-ledger.js b/packages/loopover-miner/lib/prediction-ledger.js
index ce576af2ab..45545e5ec0 100644
--- a/packages/loopover-miner/lib/prediction-ledger.js
+++ b/packages/loopover-miner/lib/prediction-ledger.js
@@ -1,7 +1,6 @@
-import { chmodSync, mkdirSync } from "node:fs";
 import { homedir } from "node:os";
-import { dirname, join } from "node:path";
-import { DatabaseSync } from "node:sqlite";
+import { join } from "node:path";
+import { openLocalStoreDb } from "./local-store.js";
 import {
   PREDICTION_LEDGER_PURGE_SPEC,
   PREDICTION_LEDGER_RETENTION_SPEC,
@@ -135,10 +134,7 @@ function rowToEntry(row) {
  */
 export function initPredictionLedger(dbPath = resolvePredictionLedgerDbPath()) {
   const resolvedPath = normalizeDbPath(dbPath);
-  mkdirSync(dirname(resolvedPath), { recursive: true, mode: 0o700 });
-  const db = new DatabaseSync(resolvedPath);
-  chmodSync(resolvedPath, 0o600);
-  db.exec("PRAGMA busy_timeout = 5000");
+  const db = openLocalStoreDb(resolvedPath);
   db.exec(`
     CREATE TABLE IF NOT EXISTS predictions (
       id INTEGER PRIMARY KEY AUTOINCREMENT,