diff --git a/CHANGELOG.md b/CHANGELOG.md
index 268e4be5f3..c3dc58cfe2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -46,6 +46,8 @@
 
 ### 🔧 Bug Fixes
 
+- **db (auto backup toggle):** full pre-write SQLite backups now honor the persisted `backup.autoBackupEnabled` dashboard setting — previously only the `DISABLE_SQLITE_AUTO_BACKUP` env var was checked, so disabling auto-backup in the UI had no effect and ~70MB pre-write snapshots kept firing. Manual and pre-restore backups still always run. Regression guard: `tests/unit/db-backup-autobackup-setting-5871.test.ts`. ([#5871](https://github.com/diegosouzapw/OmniRoute/issues/5871))
+
 - **providers (auto/ routing for custom providers):** custom OpenAI-/Anthropic-compatible providers (dynamic `*-compatible-*` connection IDs) are no longer excluded from `auto/` routing — the Auto-Combo virtual factory previously skipped any connection whose provider was absent from the static registry. It now falls back to the connection's `defaultModel`. Regression guard: `tests/unit/auto-custom-provider-5873.test.ts`. ([#5873](https://github.com/diegosouzapw/OmniRoute/issues/5873))
 
 - **middleware (hook sandbox):** operator-authored pre-request hook code now runs inside a hardened Node `vm` sandbox (minimal context, no ambient globals/`process.env`, execution timeout, no `require`) instead of `new Function()` in the main process — closing the Hard Rule #3 / SonarCloud S1523 exposure. Regression guard: `tests/unit/middleware-hook-sandbox-5872.test.ts`. ([#5872](https://github.com/diegosouzapw/OmniRoute/issues/5872))
diff --git a/src/lib/db/backup.ts b/src/lib/db/backup.ts
index a4ecb10b34..7bcd1b6a37 100644
--- a/src/lib/db/backup.ts
+++ b/src/lib/db/backup.ts
@@ -211,6 +211,102 @@ export function cleanupDbBackups(options?: { maxFiles?: number; retentionDays?:
   };
 }
 
+function coerceBoolean(value: unknown): boolean | null {
+  if (typeof value === "boolean") return value;
+  if (typeof value === "string") {
+    const v = value.trim().toLowerCase();
+    if (v === "true" || v === "1") return true;
+    if (v === "false" || v === "0") return false;
+  }
+  return null;
+}
+
+function parseStoredJson(value: string | undefined): unknown {
+  if (value === undefined) return undefined;
+  try {
+    return JSON.parse(value);
+  } catch {
+    return value;
+  }
+}
+
+/**
+ * #5871: resolve the persisted `backup.autoBackupEnabled` dashboard setting.
+ *
+ * This mirrors the precedence used by `databaseSettings.getUserDatabaseSettings()`
+ * (default `false` → `settings.databaseSettings.backup` → `settings.backup` →
+ * `databaseSettings` namespace, last wins) but reads `key_value` rows directly so
+ * `backup.ts` does not create a static import cycle with `databaseSettings.ts`
+ * (which imports `backupDbFile` at module load). Returns `true` when auto backups
+ * are explicitly disabled by the operator, so callers can skip non-manual backups.
+ */
+export function isAutoBackupDisabledBySetting(): boolean {
+  try {
+    const db = getDbInstance();
+    const rows = db
+      .prepare("SELECT namespace, key, value FROM key_value WHERE namespace IN (?, ?)")
+      .all("settings", "databaseSettings") as Array<{
+      namespace: string;
+      key: string;
+      value: string;
+    }>;
+
+    // Candidate values by source, resolved regardless of DB row iteration order.
+    // Precedence (lowest → highest, last wins), mirroring getUserDatabaseSettings():
+    //   settings.databaseSettings.backup → settings.backup → databaseSettings namespace.
+    let fromSettingsNested: boolean | null = null; // settings.databaseSettings.backup.autoBackupEnabled
+    let fromSettingsBackup: boolean | null = null; // settings.backup.autoBackupEnabled
+    let fromDbFlat: boolean | null = null; // databaseSettings namespace flat alias "autoBackupEnabled"
+    let fromDbNested: boolean | null = null; // databaseSettings namespace nested "backup.autoBackupEnabled"
+
+    for (const row of rows) {
+      const parsed = parseStoredJson(row.value);
+
+      if (row.namespace === "settings") {
+        if (row.key === "databaseSettings" && isPlainObject(parsed)) {
+          const backup = (parsed as Record<string, unknown>).backup;
+          if (isPlainObject(backup)) {
+            const b = coerceBoolean((backup as Record<string, unknown>).autoBackupEnabled);
+            if (b !== null) fromSettingsNested = b;
+          }
+        } else if (row.key === "backup" && isPlainObject(parsed)) {
+          const b = coerceBoolean((parsed as Record<string, unknown>).autoBackupEnabled);
+          if (b !== null) fromSettingsBackup = b;
+        }
+      } else if (row.namespace === "databaseSettings") {
+        if (row.key === "autoBackupEnabled") {
+          const b = coerceBoolean(parsed);
+          if (b !== null) fromDbFlat = b;
+        } else if (row.key === "backup.autoBackupEnabled") {
+          const b = coerceBoolean(parsed);
+          if (b !== null) fromDbNested = b;
+        }
+      }
+    }
+
+    // Apply precedence: last non-null wins (mirrors getUserDatabaseSettings — flat alias
+    // first, then nested key). Default (no persisted value) → not disabled.
+    let enabled: boolean | null = null;
+    for (const candidate of [
+      fromSettingsNested,
+      fromSettingsBackup,
+      fromDbFlat,
+      fromDbNested,
+    ]) {
+      if (candidate !== null) enabled = candidate;
+    }
+
+    return enabled === false;
+  } catch {
+    // If the setting cannot be read (e.g. DB not ready), do not block backups.
+    return false;
+  }
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value);
+}
+
 function isSqliteAutoBackupDisabled() {
   const isTest =
     typeof process !== "undefined" &&
@@ -260,6 +356,11 @@ export function backupDbFile(reason = "auto") {
     if (isBuildPhase || isCloud) return null;
     if (!SQLITE_FILE || !fs.existsSync(SQLITE_FILE)) return null;
     if (reason !== "manual" && isSqliteAutoBackupDisabled()) return null;
+    // #5871: honor the persisted `backup.autoBackupEnabled` dashboard toggle. Only
+    // manual and pre-restore backups bypass this gate; automatic + pre-write safety
+    // snapshots must stop firing once the operator disables auto-backup in the UI.
+    if (reason !== "manual" && reason !== "pre-restore" && isAutoBackupDisabledBySetting())
+      return null;
 
     const stat = fs.statSync(SQLITE_FILE);
     if (stat.size < 4096) {
diff --git a/tests/unit/db-backup-autobackup-setting-5871.test.ts b/tests/unit/db-backup-autobackup-setting-5871.test.ts
new file mode 100644
index 0000000000..e9ed86365c
--- /dev/null
+++ b/tests/unit/db-backup-autobackup-setting-5871.test.ts
@@ -0,0 +1,85 @@
+/**
+ * Regression guard for #5871.
+ *
+ * Full pre-write SQLite backups (~70MB) must honor the persisted
+ * `backup.autoBackupEnabled` dashboard setting, not only the
+ * `DISABLE_SQLITE_AUTO_BACKUP` env var. Before the fix, disabling auto-backup in
+ * the UI had no effect and pre-write snapshots kept firing (bounded only by the
+ * 60-minute throttle).
+ *
+ * NOTE: `isSqliteAutoBackupDisabled()` short-circuits to `true` under the test
+ * runner, so `backupDbFile()` always returns null in tests regardless of the new
+ * gate. We therefore exercise the setting-gate logic directly via the exported
+ * `isAutoBackupDisabledBySetting()` helper, which is exactly what `backupDbFile()`
+ * consults for non-manual / non-pre-restore reasons.
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-backup-5871-"));
+process.env.DATA_DIR = TEST_DATA_DIR;
+process.env.DISABLE_SQLITE_AUTO_BACKUP = "true";
+
+const core = await import("../../src/lib/db/core.ts");
+const backup = await import("../../src/lib/db/backup.ts");
+const databaseSettings = await import("../../src/lib/db/databaseSettings.ts");
+
+function resetStorage() {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
+}
+
+test.beforeEach(() => {
+  resetStorage();
+  core.getDbInstance();
+});
+
+test.after(() => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+});
+
+test("fresh install (seeded default autoBackupEnabled=false) → auto backups disabled", () => {
+  // The DB seed persists databaseSettings.autoBackupEnabled=false by default, so the
+  // dashboard toggle reads "off" out of the box — the gate must honor that.
+  assert.equal(databaseSettings.getUserDatabaseSettings().backup.autoBackupEnabled, false);
+  assert.equal(backup.isAutoBackupDisabledBySetting(), true);
+});
+
+test("no persisted value at all → auto backups are NOT disabled (backups allowed)", () => {
+  // Remove every persisted autoBackupEnabled row to exercise the "absent" branch.
+  const db = core.getDbInstance();
+  db.prepare("DELETE FROM key_value WHERE key IN (?, ?)").run(
+    "autoBackupEnabled",
+    "backup.autoBackupEnabled"
+  );
+  db.prepare("DELETE FROM key_value WHERE namespace='settings' AND key IN (?, ?)").run(
+    "backup",
+    "databaseSettings"
+  );
+  assert.equal(backup.isAutoBackupDisabledBySetting(), false);
+});
+
+test("autoBackupEnabled=false → auto backups are disabled (gate trips)", () => {
+  databaseSettings.updateDatabaseSettings({ backup: { autoBackupEnabled: false } });
+  assert.equal(backup.isAutoBackupDisabledBySetting(), true);
+});
+
+test("autoBackupEnabled=true → auto backups are NOT disabled", () => {
+  databaseSettings.updateDatabaseSettings({ backup: { autoBackupEnabled: true } });
+  assert.equal(backup.isAutoBackupDisabledBySetting(), false);
+});
+
+test("persisted value survives a getUserDatabaseSettings round-trip", () => {
+  databaseSettings.updateDatabaseSettings({ backup: { autoBackupEnabled: false } });
+  assert.equal(databaseSettings.getUserDatabaseSettings().backup.autoBackupEnabled, false);
+  assert.equal(backup.isAutoBackupDisabledBySetting(), true);
+
+  databaseSettings.updateDatabaseSettings({ backup: { autoBackupEnabled: true } });
+  assert.equal(databaseSettings.getUserDatabaseSettings().backup.autoBackupEnabled, true);
+  assert.equal(backup.isAutoBackupDisabledBySetting(), false);
+});