diff --git a/.ci/aptPackagesToInstall.txt b/.ci/aptPackagesToInstall.txt
new file mode 100644
index 0000000..e69de29
diff --git a/.ci/pythonPackagesToInstallFromGit.txt b/.ci/pythonPackagesToInstallFromGit.txt
new file mode 100644
index 0000000..f9c9b6d
--- /dev/null
+++ b/.ci/pythonPackagesToInstallFromGit.txt
@@ -0,0 +1 @@
+https://github.com/UniGrammar/charRanges.py
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..c9162b9
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = tab
+indent_size = 4
+insert_final_newline = true
+end_of_line = lf
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
diff --git a/.github/.templateMarker b/.github/.templateMarker
new file mode 100644
index 0000000..5e3a3e0
--- /dev/null
+++ b/.github/.templateMarker
@@ -0,0 +1 @@
+KOLANICH/python_project_boilerplate.py
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..89ff339
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    allow:
+      - dependency-type: "all"
diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
new file mode 100644
index 0000000..7fe33b3
--- /dev/null
+++ b/.github/workflows/CI.yml
@@ -0,0 +1,15 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: typical python workflow
+        uses: KOLANICH-GHActions/typical-python-workflow@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..71fb1b6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+__pycache__
+*.py[co]
+/*.egg-info
+*.srctrlbm
+*.srctrldb
+build
+dist
+.eggs
+monkeytype.sqlite3
+/.ipynb_checkpoints
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..6fcdcd8
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,51 @@
+image: registry.gitlab.com/kolanich-subgroups/docker-images/fixed_python:latest
+
+variables:
+  DOCKER_DRIVER: overlay2
+  SAST_ANALYZER_IMAGE_TAG: latest
+  SAST_DISABLE_DIND: "true"
+  SAST_CONFIDENCE_LEVEL: 5
+  CODECLIMATE_VERSION: latest
+
+include:
+  - template: SAST.gitlab-ci.yml
+  - template: Code-Quality.gitlab-ci.yml
+  - template: License-Management.gitlab-ci.yml
+
+build:
+  tags:
+    - shared
+    - linux
+  stage: build
+  variables:
+    GIT_DEPTH: "1"
+    PYTHONUSERBASE: ${CI_PROJECT_DIR}/python_user_packages
+
+  before_script:
+    - export PATH="$PATH:$PYTHONUSERBASE/bin" # don't move into `variables`
+    - apt-get update
+    # todo:
+    #- apt-get -y install 
+    #- pip3 install --upgrade 
+    #- python3 ./fix_python_modules_paths.py
+
+  script:
+    - python3 -m build -nw bdist_wheel
+    - mv ./dist/*.whl ./dist/escapelib-0.CI-py3-none-any.whl
+    - pip3 install --upgrade ./dist/*.whl
+    - coverage run --source=escapelib -m --branch pytest --junitxml=./rspec.xml ./tests/test.py
+    - coverage report -m
+    - coverage xml
+
+  coverage: "/^TOTAL(?:\\s+\\d+){4}\\s+(\\d+%).+/"
+
+  cache:
+    paths:
+      - $PYTHONUSERBASE
+
+  artifacts:
+    paths:
+      - dist
+    reports:
+      junit: ./rspec.xml
+      cobertura: ./coverage.xml
diff --git a/Code_Of_Conduct.md b/Code_Of_Conduct.md
new file mode 100644
index 0000000..bcaa2bf
--- /dev/null
+++ b/Code_Of_Conduct.md
@@ -0,0 +1 @@
+No codes of conduct!
\ No newline at end of file
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..20f0fa8
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,4 @@
+include UNLICENSE
+include *.md
+include tests
+include .editorconfig
diff --git a/ReadMe.md b/ReadMe.md
new file mode 100644
index 0000000..dd1dc86
--- /dev/null
+++ b/ReadMe.md
@@ -0,0 +1,11 @@
+escapelib.py [![Unlicensed work](https://raw.githubusercontent.com/unlicense/unlicense.org/master/static/favicon.png)](https://unlicense.org/)
+============
+~~[wheel (GitLab)](https://gitlab.com/UniGrammar/escapelib.py/-/jobs/artifacts/master/raw/dist/escapelib-0.CI-py3-none-any.whl?job=build)~~
+[wheel (GHA via `nightly.link`)](https://nightly.link/UniGrammar/escapelib.py/workflows/CI/master/escapelib-0.CI-py3-none-any.whl)
+~~![GitLab Build Status](https://gitlab.com/UniGrammar/escapelib.py/badges/master/pipeline.svg)~~
+~~![GitLab Coverage](https://gitlab.com/UniGrammar/escapelib.py/badges/master/coverage.svg)~~
+~~[![GitHub Actions](https://github.com/UniGrammar/escapelib.py/workflows/CI/badge.svg)](https://github.com/UniGrammar/escapelib.py/actions/)~~
+[![Libraries.io Status](https://img.shields.io/librariesio/github/UniGrammar/escapelib.py.svg)](https://libraries.io/github/UniGrammar/escapelib.py)
+[![Code style: antiflash](https://img.shields.io/badge/code%20style-antiflash-FFF.svg)](https://codeberg.org/KOLANICH-tools/antiflash.py)
+
+A library to escape characters for various contexts.
diff --git a/UNLICENSE b/UNLICENSE
new file mode 100644
index 0000000..efb9808
--- /dev/null
+++ b/UNLICENSE
@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org/>
diff --git a/escapelib/__init__.py b/escapelib/__init__.py
new file mode 100644
index 0000000..f852552
--- /dev/null
+++ b/escapelib/__init__.py
@@ -0,0 +1,168 @@
+import re
+import string
+import typing
+from abc import ABC, abstractmethod
+from ast import literal_eval
+
+from rangeslicetools.tree import RangesTree
+
+from charRanges import multiRSub, stringToRanges
+
+
+def generateEscapeMapForRegExpCharClass() -> typing.Dict[int, str]:
+	try:
+		specialCharsMap = type(re._special_chars_map)(re._special_chars_map)  # pylint: disable=protected-access
+		allowedChars = " *+|#~&(){}^[$?"
+		for c in allowedChars:
+			del specialCharsMap[ord(c)]
+	except BaseException:
+		specialCharsMap = {
+			"\n": "\\n",
+			"\r": "\\r",
+			".": "\\.",
+			0: "\\0",
+			"]": "\\]"
+		}
+	return specialCharsMap
+
+
+ourSpecialCharsMap = generateEscapeMapForRegExpCharClass()
+
+
+def reCharClassEscape(c: str) -> str:
+	c = repr(c)[1:-1]
+	if len(c) == 1:
+		c = c.translate(ourSpecialCharsMap)
+	return c
+
+
+def hexStringizer(x: int) -> str:
+	return hex(x)[2:]
+
+
+def backslashUHex4CodePointsStringizer(c: str) -> str:
+	res = hexStringizer(c)
+	threshold = 4
+	res = "0" * (threshold - len(res)) + res
+	return res
+
+
+stringizers = {
+	"hex": hexStringizer,
+	"uhex": backslashUHex4CodePointsStringizer,
+	"oct": lambda x: oct(x)[2:],
+	"dec": str,
+}
+
+
+class CharEscaper(ABC):
+	@abstractmethod
+	def __call__(self, c: str) -> str:
+		raise NotImplementedError()
+
+
+def createDefaultCharsToEscape() -> RangesTree:
+	visible = stringToRanges("".join(sorted(set(string.printable) - set(string.whitespace) | {" "})))
+	invisible = tuple(multiRSub(visible, base=range(0, 0xff)))
+	return RangesTree.build(invisible)
+
+
+defaultCharsToEscape = createDefaultCharsToEscape()
+
+
+class UnicodeEscaper(CharEscaper):
+	__slots__ = ("range", "template", "stringizer")
+
+	def __init__(self, template: str, ranges: RangesTree = None, stringizer: str = "hex") -> None:
+		self.template = template
+
+		if ranges is None:
+			ranges = defaultCharsToEscape
+
+		self.range = ranges
+		if isinstance(stringizer, str):
+			stringizer = stringizers[stringizer]
+		self.stringizer = stringizer
+
+	def __call__(self, c: str) -> str:
+		cc = ord(c)
+		res = tuple(self.range[cc])
+		if res:
+			return self.template.format(self.stringizer(cc))
+		return c
+
+
+class CompositeEscaper(CharEscaper):
+	__slots__ = ("children",)
+
+	def __init__(self, *children) -> None:
+		self.children = children
+
+	def __call__(self, c: str) -> str:
+		for e in self.children:
+			c = e(c)
+			if len(c) != 1:
+				return c
+		return c
+
+
+def genRemappingEscapeCharsLiterally(s: str) -> typing.Dict[int, str]:
+	return {ord(c): ("\\" + c) for c in s}
+
+
+class RemappingEscaper(CharEscaper):
+	__slots__ = ("mapping",)
+
+	def __init__(self, mapping: typing.Union[str, typing.Dict[int, str]]) -> None:
+		if isinstance(mapping, str):
+			mapping = genRemappingEscapeCharsLiterally(mapping)
+		self.mapping = mapping
+
+	def __call__(self, c: str) -> str:
+		return c.translate(self.mapping)
+
+
+pythonRegExpEscaper = RemappingEscaper(ourSpecialCharsMap)
+
+
+def genCommonRemapping() -> typing.Dict[int, str]:
+	res = genRemappingEscapeCharsLiterally("\\")
+	for cc in "abtrn":
+		escSeq = "\\" + cc
+		res[ord(literal_eval('"' + escSeq + '"'))] = escSeq
+	return res
+
+
+commonCharsEscaper = RemappingEscaper(genCommonRemapping())
+
+
+class PythonReprEscaper(CharEscaper):
+	__slots__ = ()
+
+	def __call__(self, c: str) -> str:
+		return repr(c)[1:-1]
+
+
+class PythonREEscaper(CharEscaper):
+	__slots__ = ()
+
+	def __call__(self, c: str) -> str:
+		return re.escape(c)
+
+
+pythonReprEscaper = PythonReprEscaper()
+pythonREEscaper = PythonREEscaper()
+
+pythonRegexEscaper = CompositeEscaper(pythonReprEscaper, pythonREEscaper)
+
+
+singleTickEscaper = RemappingEscaper("'")
+doubleTickEscaper = RemappingEscaper('"')
+closingSquareBracketEscaper = RemappingEscaper("]")
+backslashUHexEscaper = UnicodeEscaper("\\u{{{}}}", stringizer="uhex")
+backslashXHexEscaper = UnicodeEscaper("\\x{}", stringizer="hex")
+
+commonEscaper = CompositeEscaper(commonCharsEscaper, backslashUHexEscaper)
+
+defaultCharClassEscaper = CompositeEscaper(commonEscaper, closingSquareBracketEscaper)
+defaultStringEscaper = CompositeEscaper(commonEscaper, doubleTickEscaper)
diff --git a/escapelib/py.typed b/escapelib/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..643ab7b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,39 @@
+[build-system]
+requires = ["setuptools>=61.2.0", "wheel", "setuptools_scm[toml]>=3.4.3"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "escapelib"
+readme = "ReadMe.md"
+description = "A library to escape characters for various contexts."
+authors = [{name = "KOLANICH"}]
+classifiers = [
+	"Development Status :: 4 - Beta",
+	"Environment :: Other Environment",
+	"Intended Audience :: Developers",
+	"License :: Public Domain",
+	"Operating System :: OS Independent",
+	"Programming Language :: Python",
+	"Programming Language :: Python :: 3",
+	"Programming Language :: Python :: 3 :: Only",
+	"Topic :: Software Development :: Libraries :: Python Modules",
+]
+keywords = ["escapelib"]
+license = {text = "Unlicense"}
+requires-python = ">=3.4"
+dynamic = ["version"]
+dependencies = [
+	"rangeslicetools", # @ git+https://codeberg.org/KOLANICH-libs/rangeslicetools.py.git
+	"charRanges", # @ git+https://codeberg.org/UniGrammar/charRanges.py
+]
+
+[project.urls]
+Homepage = "https://codeberg.org/UniGrammar/escapelib.py"
+
+[tool.setuptools]
+zip-safe = true
+
+[tool.setuptools.packages.find]
+include = ["escapelib", "escapelib.*"]
+
+[tool.setuptools_scm]
diff --git a/tests/tests.py b/tests/tests.py
new file mode 100755
index 0000000..4bc45e0
--- /dev/null
+++ b/tests/tests.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+import sys
+from pathlib import Path
+import unittest
+import itertools, re
+import colorama
+
+sys.path.insert(0, str(Path(__file__).parent.parent))
+
+from collections import OrderedDict
+
+dict = OrderedDict
+
+import escapelib
+from escapelib import *
+
+class Tests(unittest.TestCase):
+
+	def test_escape(self):
+		testVectors = {
+			("A", PythonREEscaper): "A",
+			("z", PythonREEscaper): "z",
+			("9", PythonREEscaper): "9",
+			("-", PythonREEscaper): "\\-",
+			("+", PythonREEscaper): "\\+"
+		}
+		for (chall, escaperCtor), resp in testVectors.items():
+			with self.subTest(chall=chall, escaperCtor=escaperCtor, resp=resp):
+				escaper = escaperCtor()
+				actual = escaper(chall)
+				self.assertEqual(resp, actual)
+
+
+if __name__ == "__main__":
+	unittest.main()