diff --git a/.github/actionlint.yaml b/.github/actionlint.yaml
index 1abc6d5..aad3f84 100644
--- a/.github/actionlint.yaml
+++ b/.github/actionlint.yaml
@@ -2,7 +2,7 @@ self-hosted-runner:
   labels: []
 config-variables:  null
 paths:
-  . github/workflows/*.yml: 
-    ignore: 
+  . github/workflows/*.yml:
+    ignore:
       - 'SC2086'  # Allow unquoted variables in shell (common in workflows)
       - ".+SC1090.+"
diff --git a/.github/workflows/maintain-lists.yml b/.github/workflows/maintain-lists.yml
index 9f49007..1a1c845 100644
--- a/.github/workflows/maintain-lists.yml
+++ b/.github/workflows/maintain-lists.yml
@@ -14,7 +14,7 @@ env:
   DEBIAN_FRONTEND: noninteractive
   LC_ALL: C
   GITHUB_TOKEN: ${{ secrets.PAT || secrets.GITHUB_TOKEN }}
-  
+
 jobs:
   maintain:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/update-lists.yml b/.github/workflows/update-lists.yml
index 3117073..1e58147 100644
--- a/.github/workflows/update-lists.yml
+++ b/.github/workflows/update-lists.yml
@@ -22,7 +22,7 @@ env:
   PYTHON_COLORS: 0
   LC_ALL: C
   GITHUB_TOKEN: ${{ secrets.PAT || secrets.GITHUB_TOKEN }}
-jobs: 
+jobs:
   update-mirror:
     name: Download & Mirror AdLists
     runs-on:  ubuntu-latest
@@ -46,7 +46,7 @@ jobs:
         id: update
         run: |
           set -e; mkdir -p lists/mirror
-          uv run python3 -OO Scripts/update-lists.py --output-dir lists/mirror --max-concurrent 8
+          uv run python3 -OO -m Scripts.update_lists --output-dir lists/mirror --max-concurrent 8
       - name: Run dead domains linter
         if: success()
         continue-on-error: true
@@ -60,7 +60,7 @@ jobs:
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git remote set-branches origin adlists-mirror || : 
+          git remote set-branches origin adlists-mirror || :
           git fetch --depth=1 -nq origin adlists-mirror || git checkout -b adlists-mirror
       - name: Commit changes
         id: commit
diff --git a/.serena/project.yml b/.serena/project.yml
index 1c0ab96..6386032 100644
--- a/.serena/project.yml
+++ b/.serena/project.yml
@@ -58,7 +58,7 @@ read_only: false
 
 # list of tool names to exclude. We recommend not excluding any tools, see the readme for more details.
 # Below is the complete list of tools for convenience.
-# To make sure you have the latest list of tools, and to view their descriptions, 
+# To make sure you have the latest list of tools, and to view their descriptions,
 # execute `uv run scripts/print_tool_overview.py`.
 #
 #  * `activate_project`: Activates a project by name.
diff --git a/.yamllint.yml b/.yamllint.yml
index f8ce091..0ddde7f 100644
--- a/.yamllint.yml
+++ b/.yamllint.yml
@@ -2,7 +2,7 @@
 extends: default
 
 rules:
-  line-length: 
+  line-length:
     max: 120
     level: warning
   indentation:
@@ -10,7 +10,7 @@ rules:
   comments:
     min-spaces-from-content: 1
   document-start: disable
-  truthy: 
+  truthy:
     allowed-values: ["true", "false"]
   braces:
     max-spaces-inside: 0
diff --git a/Scripts/build.sh b/Scripts/build.sh
index b3e4e4c..48952af 100755
--- a/Scripts/build.sh
+++ b/Scripts/build.sh
@@ -104,7 +104,7 @@ build_hostlist(){
   }
   [[ -f configuration_popup_filter.json ]] && {
     hostlist-compiler -c configuration_popup_filter.json -o "$FILTER_OUT/adguard_popup_filter.txt" --verbose || warn "Popup filter compilation failed"
-    [[ -f scripts/popup_filter_build.js ]] && node scripts/popup_filter_build.js "$FILTER_OUT/adguard_popup_filter.txt" || : 
+    [[ -f scripts/popup_filter_build.js ]] && node scripts/popup_filter_build.js "$FILTER_OUT/adguard_popup_filter.txt" || :
   }
 }
 
@@ -179,15 +179,15 @@ build_userscripts(){
     mapfile -t files < <(find "$SCRIPT_SRC" -type f -name "*.js" 2>/dev/null)
   (( ${#files[@]} == 0 )) && { log userscripts "No files in $SCRIPT_SRC"; return 0; }
   log userscripts "Processing ${#files[@]} files"
-  has eslint && eslint --fix --quiet --no-warn-ignored "${files[@]}" 2>/dev/null || : 
+  has eslint && eslint --fix --quiet --no-warn-ignored "${files[@]}" 2>/dev/null || :
   export -f _process_js ok err warn
   export REPO SCRIPT_OUT R G Y N RUNNER
   RUNNER=$(runner)
   if [[ -n $(par) ]] && (( ${#files[@]} > 1 )); then
-    printf '%s\n' "${files[@]}" | "$(par)" -j "$(jobs)" --bar _process_js {} 2>/dev/null || : 
+    printf '%s\n' "${files[@]}" | "$(par)" -j "$(jobs)" --bar _process_js {} 2>/dev/null || :
   else
     for f in "${files[@]}"; do
-      _process_js "$f" || : 
+      _process_js "$f" || :
     done
   fi
   [[ -f $SCRIPT_LIST ]] && cp "$SCRIPT_LIST" "$SCRIPT_OUT/README.md"
diff --git a/Scripts/deduplicate.py b/Scripts/deduplicate.py
index 781ffd6..3d0dc5a 100755
--- a/Scripts/deduplicate.py
+++ b/Scripts/deduplicate.py
@@ -13,8 +13,7 @@
 from dataclasses import dataclass
 from collections.abc import Iterable
 
-
-from common import is_valid_domain, write_lines
+from Scripts.common import is_valid_domain, write_lines
 
 HEADER_PREFIXES = ("! ", "#", "[", ";")
 
diff --git a/Scripts/hosts-creator.sh b/Scripts/hosts-creator.sh
index 610c9b6..692a9b5 100644
--- a/Scripts/hosts-creator.sh
+++ b/Scripts/hosts-creator.sh
@@ -48,7 +48,7 @@ process(){
   [[ ${RM_COMMENTS:-1} == 1 ]] && awk_cmd="!/^#/"
   [[ ${RM_TRAILING_SPACES:-1} == 1 ]] && awk_cmd="${awk_cmd:+$awk_cmd && }{gsub(/^ +| +$/,\"\");print}"
   [[ ${RM_DUPLICATE_LINES:-1} == 1 ]] && awk_cmd="${awk_cmd:+$awk_cmd && }! seen[\$0]++"
-  
+
   if [[ -n $awk_cmd ]]; then
     local tmp
     tmp=$(mktemp)
diff --git a/Scripts/move-pure-domains.py b/Scripts/move_pure_domains.py
similarity index 98%
rename from Scripts/move-pure-domains.py
rename to Scripts/move_pure_domains.py
index a7bc951..23be8a6 100644
--- a/Scripts/move-pure-domains.py
+++ b/Scripts/move_pure_domains.py
@@ -9,8 +9,7 @@
 from collections import defaultdict
 
 # Import common utilities
-
-from common import is_valid_domain, read_lines, write_lines
+from Scripts.common import is_valid_domain, read_lines, write_lines
 
 
 def is_pure_domain(line: str) -> bool:
diff --git a/Scripts/test_common.py b/Scripts/test_common.py
index 1cae1ba..2d66abf 100644
--- a/Scripts/test_common.py
+++ b/Scripts/test_common.py
@@ -1,10 +1,12 @@
 import unittest
 import sys
+import io
+import tempfile
 from pathlib import Path
 import hashlib
+from unittest.mock import patch
 
-
-from common import sanitize_filename, is_valid_domain, is_adguard_rule
+from Scripts.common import sanitize_filename, is_valid_domain, is_adguard_rule, read_lines
 
 
 class TestCommon(unittest.TestCase):
@@ -84,9 +86,27 @@ def test_is_adguard_rule(self):
         self.assertTrue(is_adguard_rule("! comment"))
         self.assertFalse(is_adguard_rule("example.com"))
 
+    def test_read_lines(self):
+        with tempfile.TemporaryDirectory() as temp_dir:
+            temp_dir_path = Path(temp_dir)
+            target_file = temp_dir_path / "test.txt"
+            target_file.write_text("line1 \nline2\r\nline3", encoding="utf-8")
+
+            lines = read_lines(target_file)
+            self.assertEqual(lines, ["line1", "line2", "line3"])
+
+    def test_read_lines_file_not_found(self):
+        with tempfile.TemporaryDirectory() as temp_dir:
+            temp_dir_path = Path(temp_dir)
+            non_existent = temp_dir_path / "missing.txt"
+
+            with patch("sys.stderr", new_callable=io.StringIO) as mock_stderr:
+                lines = read_lines(non_existent)
+                self.assertIsNone(lines)
+                self.assertIn(f"Error reading {non_existent}", mock_stderr.getvalue())
+
     def test_write_lines_atomic(self):
-        import tempfile
-        from common import write_lines
+        from Scripts.common import write_lines
 
         with tempfile.TemporaryDirectory() as temp_dir:
             temp_dir_path = Path(temp_dir)
diff --git a/Scripts/test_deduplicate.py b/Scripts/test_deduplicate.py
index 5a8a607..bf94def 100644
--- a/Scripts/test_deduplicate.py
+++ b/Scripts/test_deduplicate.py
@@ -1,9 +1,7 @@
 import unittest
-import sys
-from pathlib import Path
 
-
-from deduplicate import process_content, is_header, is_valid_rule
+# Add current directory to path to allow importing deduplicate
+from Scripts.deduplicate import process_content, is_header, is_valid_rule
 
 
 class TestDeduplicate(unittest.TestCase):
diff --git a/Scripts/test_is_pure_domain_logic.py b/Scripts/test_is_pure_domain_logic.py
index c88da48..da50a7d 100644
--- a/Scripts/test_is_pure_domain_logic.py
+++ b/Scripts/test_is_pure_domain_logic.py
@@ -1,15 +1,11 @@
 import unittest
-import sys
-from pathlib import Path
 import importlib
 
-
 # Import ADGUARD_INDICATORS from common
-from common import ADGUARD_INDICATORS
+from Scripts.common import ADGUARD_INDICATORS
 
 # Import is_pure_domain from move-pure-domains
-move_pure_domains = importlib.import_module("move-pure-domains")
-is_pure_domain = move_pure_domains.is_pure_domain
+from Scripts.move_pure_domains import is_pure_domain
 
 
 class TestIsPureDomain(unittest.TestCase):
diff --git a/Scripts/test_move_pure_domains.py b/Scripts/test_move_pure_domains.py
index 85548ec..1bbfb90 100644
--- a/Scripts/test_move_pure_domains.py
+++ b/Scripts/test_move_pure_domains.py
@@ -4,7 +4,7 @@
 from unittest.mock import Mock, mock_open
 
 # Import the module dynamically
-file_path = Path(__file__).parent / "move-pure-domains.py"
+file_path = Path(__file__).parent / "move_pure_domains.py"
 spec = importlib.util.spec_from_file_location("move_pure_domains", file_path)
 if spec is None or spec.loader is None:
     raise ImportError("Could not load module")
diff --git a/Scripts/test_update_lists.py b/Scripts/test_update_lists.py
index 10de0ee..cc41513 100644
--- a/Scripts/test_update_lists.py
+++ b/Scripts/test_update_lists.py
@@ -20,7 +20,8 @@ class ClientError(Exception):
 sys.modules["aiohttp"] = aiohttp_mock
 sys.modules["aiofiles"] = MagicMock()
 
-spec = importlib.util.spec_from_file_location("update_lists", "Scripts/update-lists.py")
+spec = importlib.util.spec_from_file_location("update_lists", "Scripts/update_lists.py")
+>>>>>>> origin/jules/fix-sys-path-boilerplate-6564146397324574189
 update_lists = importlib.util.module_from_spec(spec)
 sys.modules["update_lists"] = update_lists
 spec.loader.exec_module(update_lists)
diff --git a/Scripts/update-lists.py b/Scripts/update_lists.py
similarity index 99%
rename from Scripts/update-lists.py
rename to Scripts/update_lists.py
index 6181242..b70b2e1 100644
--- a/Scripts/update-lists.py
+++ b/Scripts/update_lists.py
@@ -21,8 +21,7 @@
 import aiofiles
 
 # Import common utilities
-
-from common import sanitize_filename
+from Scripts.common import sanitize_filename
 
 # ============================================================================
 # CONFIGURATION
diff --git a/Scripts/userscript.sh b/Scripts/userscript.sh
index b6faf32..4ee7bc6 100644
--- a/Scripts/userscript.sh
+++ b/Scripts/userscript.sh
@@ -12,7 +12,7 @@ if has biome; then
   biome check --fix --unsafe --skip-parse-errors --no-errors-on-unmatched --html-formatter-line-width=120 --css-formatter-line-width=120 --json-formatter-line-width=120 \
   --use-editorconfig=true --indent-style=space --format-with-errors=true --files-ignore-unknown=true --vcs-use-ignore-file=false "$PWD"
 fi
-if has ruff; then 
+if has ruff; then
   ruff format --line-length 120 --target-version py311 "$PWD"
 fi
 has yamlfmt && { yamlfmt -continue_on_error "*.yaml"; yamlfmt -continue_on_error "*.yml"; }
diff --git a/mise.toml b/mise.toml
index 41e68e5..db57547 100644
--- a/mise.toml
+++ b/mise.toml
@@ -40,7 +40,7 @@ PYTHONOPTIMIZE = "2"
 PYTHONDONTWRITEBYTECODE = "1"
 PYTHONNODEBUGRANGES = "1"
 PYTHONUTF8 = "1"
-PYTHONIOENCODING = "UTF-8" 
+PYTHONIOENCODING = "UTF-8"
 UV_LINK_MODE = "hardlink"
 DO_NOT_TRACK = "1"
 CARGO_NET_GIT_FETCH_WITH_CLI = "false"