From 7d457a32f779083c085c7b28b2eb828b1ce4b660 Mon Sep 17 00:00:00 2001
From: Aharshi3614 <aharshisinha2020@gmail.com>
Date: Tue, 2 Jun 2026 15:36:50 +0530
Subject: [PATCH 1/2] fix: add retry fallback for SQLite database lock

---
 backend/services/db_service.py         | 40 ++++++++++++++++++++++----
 backend/tests/test_db_lock_fallback.py |  8 ++++++
 2 files changed, 42 insertions(+), 6 deletions(-)
 create mode 100644 backend/tests/test_db_lock_fallback.py

diff --git a/backend/services/db_service.py b/backend/services/db_service.py
index af3f88f..66d8ed9 100644
--- a/backend/services/db_service.py
+++ b/backend/services/db_service.py
@@ -7,6 +7,8 @@
 import json
 import os
 from contextlib import contextmanager
+import time
+from sqlite3 import OperationalError
 
 DB_PATH = os.getenv("DB_PATH", "./data/localmind.db")
 os.makedirs(os.path.dirname(DB_PATH) if os.path.dirname(DB_PATH) else ".", exist_ok=True)
@@ -14,19 +16,45 @@
 
 @contextmanager
 def get_db():
-    conn = sqlite3.connect(DB_PATH)
-    conn.row_factory = sqlite3.Row
-    conn.execute("PRAGMA journal_mode=WAL")
-    conn.execute("PRAGMA foreign_keys=ON")
+    retries = 3
+    delay = 0.2
+
+    conn = None
+
+    for attempt in range(retries):
+        try:
+            conn = sqlite3.connect(DB_PATH, timeout=5)
+            conn.row_factory = sqlite3.Row
+            conn.execute("PRAGMA journal_mode=WAL")
+            conn.execute("PRAGMA foreign_keys=ON")
+            break
+
+        except OperationalError as e:
+            if "locked" in str(e).lower() and attempt < retries - 1:
+                time.sleep(delay)
+                continue
+            raise
+
     try:
         yield conn
         conn.commit()
+
+    except OperationalError as e:
+        if "locked" in str(e).lower():
+            conn.rollback()
+            raise RuntimeError(
+                "Database is busy. Please try again in a moment."
+            ) from e
+        conn.rollback()
+        raise
+
     except Exception:
         conn.rollback()
         raise
-    finally:
-        conn.close()
 
+    finally:
+        if conn:
+            conn.close()
 
 def init_db():
     """Create all tables on startup."""
diff --git a/backend/tests/test_db_lock_fallback.py b/backend/tests/test_db_lock_fallback.py
new file mode 100644
index 0000000..7e54834
--- /dev/null
+++ b/backend/tests/test_db_lock_fallback.py
@@ -0,0 +1,8 @@
+from services.db_service import get_db
+
+
+def test_db_connection_opens():
+    with get_db() as conn:
+        result = conn.execute("SELECT 1").fetchone()
+
+    assert result[0] == 1
\ No newline at end of file

From 8e5ffd1d84bdaf71acac67c8dd260ae5cf2bf751 Mon Sep 17 00:00:00 2001
From: Aharshi3614 <aharshisinha2020@gmail.com>
Date: Thu, 11 Jun 2026 15:49:30 +0530
Subject: [PATCH 2/2] feat: add pip and node_modules cache to GitHub Actions CI

---
 .github/workflows/ci.yml | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8281bb..01e3636 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,6 +19,14 @@ jobs:
         with:
           python-version: "3.11"
 
+      - name: Cache pip dependencies
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('backend/requirements.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
       - name: Install dependencies
         run: |
           cd backend
@@ -46,8 +54,16 @@ jobs:
         with:
           node-version: "20"
 
+      - name: Cache node_modules
+        uses: actions/cache@v4
+        with:
+          path: frontend/node_modules
+          key: ${{ runner.os }}-node-${{ hashFiles('frontend/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
       - name: Install & build
         run: |
           cd frontend
           npm install
-          npm run build
+          npm run build
\ No newline at end of file