diff --git a/.github/workflows/code_coverage.yml b/.github/workflows/code_coverage.yml
new file mode 100644
index 0000000..0ab791e
--- /dev/null
+++ b/.github/workflows/code_coverage.yml
@@ -0,0 +1,26 @@
+name: "Code Coverage"
+
+on: [push, pull_request]
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Install dependencies
+      run: |
+        pip install -r requirements.txt
+    - name: Run pytest with coverage
+      run: |
+        pytest --cov=./ --cov-report=xml
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        file: ./coverage.xml
+        flags: unittests
+        name: codecov-umbrella
+        fail_ci_if_error: true
\ No newline at end of file
diff --git a/.github/workflows/code_security.yml b/.github/workflows/code_security.yml
new file mode 100644
index 0000000..da5cdb5
--- /dev/null
+++ b/.github/workflows/code_security.yml
@@ -0,0 +1,23 @@
+name: "Code Security"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: '0 5 * * 1'
+
+jobs:
+  CodeQL:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: python
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
\ No newline at end of file
diff --git a/.github/workflows/code_styling.yml b/.github/workflows/code_styling.yml
new file mode 100644
index 0000000..5b79c71
--- /dev/null
+++ b/.github/workflows/code_styling.yml
@@ -0,0 +1,19 @@
+name: "Code Styling"
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Install dependencies
+      run: |
+        pip install ruff
+    - name: Run ruff linter
+      run: |
+        ruff check .
\ No newline at end of file
diff --git a/school_center.py b/school_center.py
index ea103ce..a03e859 100644
--- a/school_center.py
+++ b/school_center.py
@@ -101,17 +101,17 @@ def read_tsv(file_path: str) -> List[Dict[str, str]]:
             reader = csv.DictReader(file, delimiter='\t')
             for row in reader:
                 data.append(dict(row))
-    except FileNotFoundError:
-        logger.error(f"File '{file_path}' not found.")
+    except FileNotFoundError as e:
+        logger.error(f"File '{file_path} : {e}' not found.")
         sys.exit(1)
-    except PermissionError:
-        logger.error(f"Permission denied while accessing file '{file_path}'.")
+    except PermissionError as e:
+        logger.error(f"Permission denied while accessing file '{file_path}' : {e}.")
         sys.exit(1)
-    except IOError:
-        logger.error(f"Error opening or reading file: {file_path}")
+    except IOError as e:
+        logger.error(f"Error opening or reading file: '{file_path}' : {e}")
         sys.exit(1)
     except Exception as e:
-        logger.error(f"An unexpected error occurred while reading file '{file_path}': {e}")
+        logger.error(f"An unexpected error occurred while reading file '{file_path}' : {e}")
         sys.exit(1)
     return data
 
@@ -133,14 +133,14 @@ def read_prefs(file_path: str) -> Dict[str, Dict[str, int]]:
                         prefs[row['scode']][row['cscode']] = int(row['pref'])
                 else:
                     prefs[row['scode']] = {row['cscode']: int(row['pref'])}
-    except FileNotFoundError:
-        logger.error(f"File '{file_path}' not found.")
+    except FileNotFoundError as e:
+        logger.error(f"File '{file_path} :{e}' not found.")
         sys.exit(1)
-    except PermissionError:
-        logger.error(f"Permission denied while accessing file '{file_path}'.")
+    except PermissionError as e:
+        logger.error(f"Permission denied while accessing file '{file_path}:{e}'.")
         sys.exit(1)
-    except IOError:
-        logger.error(f"Error opening or reading file: {file_path}")
+    except IOError as e:
+        logger.error(f"Error opening or reading file: {file_path} :{e}")
         sys.exit(1)
     except Exception as e:
         logger.error(f"An unexpected error occurred while reading file '{file_path}': {e}")