diff --git a/.gitignore b/.gitignore
index ab3e8ce..0537cc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -162,3 +162,4 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+**/test.env
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..ff9a4ed
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,35 @@
+[project]
+name = "Booker"
+version = "0.1.0"
+
+dependencies = [
+    "pydantic>=2.8.2,<3.0.0",
+    "pydantic-settings>=2.4.0,<3.0.0",
+    "pyyaml>=6.0,<7.0",
+    "pendulum>=3.0.0,<4.0.0",
+    "requests>=2.32.3,<3.0.0",
+    "typer>=0.12.5,<0.13.0"
+]
+
+[project.optional-dependencies]
+dev = [
+    "black>=24.4.2,<25.0.0",
+    "isort>=5.13.2,<6.0.0",
+    "ruff>=0.5.4,<0.6.0",
+    "pytest>=8.3.1,<9.0.0",
+    "pytest-icdiff>=0.9,<1.0",
+    "pytest-sugar>=1.0.0,<2.0.0",
+]
+
+[tool.ruff]
+line-length = 88
+
+[tool.isort]
+profile = "black"
+
+[tool.pytest.ini_options]
+pythonpath = [
+    "src"
+]
+log_cli = 1
+log_cli_level = "DEBUG"
\ No newline at end of file
diff --git a/src/__init__.py b/src/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/losoup/__init__.py b/src/losoup/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/losoup/cvs/__init__.py b/src/losoup/cvs/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/losoup/cvs/github.py b/src/losoup/cvs/github.py
new file mode 100644
index 0000000..6cb9ce2
--- /dev/null
+++ b/src/losoup/cvs/github.py
@@ -0,0 +1,41 @@
+import requests
+
+from losoup.models import Asset, GithubSoftware
+from losoup.cvs.github_settings import GithubSettings
+
+
+class GithubConnector:
+    def __init__(self, settings: GithubSettings):
+        self.settings = settings
+
+    def get_release_assets_list(self, release_url: str) -> list[Asset]:
+        headers = {
+            "Accept": "application/vnd.github+json",
+            "Authorization": f"token {self.settings.token}",
+            "X-Github-Api-Version": "2022-11-28",
+        }
+        response = requests.get(release_url, headers=headers)
+        assets = []
+        for asset in response.json().get("assets"):
+            assets.append(Asset(name=asset.get("name"), url=asset.get("url")))
+        return assets
+
+    def get_release_asset(self, software: GithubSoftware) -> Asset:
+        for asset in self.get_release_assets_list(software.release_url):
+            if asset.name == software.filename:
+                return asset
+            else:
+                continue
+
+    def download_release_asset(self, asset: Asset) -> bytes:
+        headers = {
+            "Accept": "application/octet-stream",
+            "Authorization": f"token {self.settings.token}",
+            "X-Github-Api-Version": "2022-11-28",
+        }
+        response = requests.get(asset.url, headers=headers)
+        return response.content
+
+    def download_software(self, software: GithubSoftware) -> bytes:
+        release_asset = self.get_release_asset(software)
+        return self.download_release_asset(release_asset)
diff --git a/src/losoup/cvs/github_settings.py b/src/losoup/cvs/github_settings.py
new file mode 100644
index 0000000..d70d72f
--- /dev/null
+++ b/src/losoup/cvs/github_settings.py
@@ -0,0 +1,8 @@
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class GithubSettings(BaseSettings):
+    model_config = SettingsConfigDict(env_prefix="GITHUB_")
+
+    token: str
+    url: str = "https://api.github.com/repos"
diff --git a/src/losoup/cvs/gitlab.py b/src/losoup/cvs/gitlab.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/losoup/file_operations/__init__.py b/src/losoup/file_operations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/losoup/file_operations/local_files.py b/src/losoup/file_operations/local_files.py
new file mode 100644
index 0000000..9b612c8
--- /dev/null
+++ b/src/losoup/file_operations/local_files.py
@@ -0,0 +1,24 @@
+from pathlib import Path
+
+from losoup.models import Software, Asset
+
+
+class LocalFile:
+    def __init__(self, software: Software):
+        self.software = software
+
+    def get_files_in_folder(self) -> list[str]:
+        return [file.name for file in Path(self.software.folder).glob("*")]
+
+    def is_file_present(self):
+        files = self.get_files_in_folder()
+        return self.software.filename in files
+
+    def is_file_absent(self):
+        return not self.is_file_present()
+
+    def write_file(self, file: Asset) -> None:
+        self.software.absolute_path.write_bytes(file.content)
+
+    def delete_file(self):
+        self.software.absolute_path.unlink()
diff --git a/src/losoup/main.py b/src/losoup/main.py
new file mode 100644
index 0000000..566c852
--- /dev/null
+++ b/src/losoup/main.py
@@ -0,0 +1,28 @@
+from pathlib import Path
+
+import yaml
+
+from losoup.file_operations import local_files
+from losoup.models import Software, GitlabSoftware, GithubSoftware
+
+
+def load_software_list(software_file: Path) -> list[Software]:
+    software_yaml = yaml.safe_load(software_file.open())
+    software_list = []
+    for software in software_yaml.get("software", []):
+        match software.get("cvs").lower():
+            case "github":
+                software_list.append(GithubSoftware(**software))
+            case "gitlab":
+                software_list.append(GitlabSoftware(**software))
+            case _:
+                pass
+    return software_list
+
+
+def is_software_to_update(software: Software) -> bool:
+    return local_files.LocalFile(software).is_file_absent()
+
+
+if __name__ == "__main__":
+    pass
diff --git a/src/losoup/models.py b/src/losoup/models.py
new file mode 100644
index 0000000..c755e84
--- /dev/null
+++ b/src/losoup/models.py
@@ -0,0 +1,52 @@
+from pathlib import Path
+
+from pydantic import BaseModel, Field, field_validator
+
+
+class Software(BaseModel):
+    name: str
+    owner: str
+    repo: str
+    version: str
+    folder: str
+    filename_format: str = Field(..., alias="filenameFormat")
+
+    @field_validator("folder")
+    @classmethod
+    def replace_tilde(cls, value: str):
+        return value.replace("~", Path.home().as_posix())
+
+    @property
+    def filename(self) -> str:
+        return self.filename_format.replace("{{version}}", self.version)
+
+    @property
+    def absolute_path(self) -> Path:
+        return Path(self.folder, self.filename)
+
+
+class GithubSoftware(Software):
+    base_url: str = "https://api.github.com"
+
+    @property
+    def release_url(self):
+        if self.version == "latest":
+            release_path = self.version
+        else:
+            release_path = f"tags/{self.version}"
+
+        return f"{self.base_url}/repos/{self.owner}/{self.repo}/releases/{release_path}"
+
+
+class GitlabSoftware(Software):
+    base_url: str = Field(..., alias="baseUrl")
+
+    @property
+    def release_url(self):
+        return f"{self.base_url}/{self.owner}/{self.repo}/-/releases/{self.version}"
+
+
+class Asset(BaseModel):
+    name: str
+    url: str
+    content: bytes | str | None = None
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/test/losoup/__init__.py b/test/losoup/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/test/losoup/conftest.py b/test/losoup/conftest.py
new file mode 100644
index 0000000..55fcad3
--- /dev/null
+++ b/test/losoup/conftest.py
@@ -0,0 +1,121 @@
+from pathlib import Path
+
+import pytest
+
+from losoup.file_operations.local_files import LocalFile
+from losoup.models import GithubSoftware, Asset
+from losoup.cvs.github import GithubConnector
+from losoup.cvs.github_settings import GithubSettings
+
+current_dir = Path(__file__).parent.absolute()
+dotenv = current_dir / "test.env"
+
+
+@pytest.fixture
+def github_settings():
+    return GithubSettings(_env_file=dotenv)
+
+
+@pytest.fixture
+def github_connector(github_settings):
+    return GithubConnector(github_settings)
+
+
+@pytest.fixture
+def keepassxc():
+    return GithubSoftware(
+        name="KeepassXC",
+        owner="keepassxreboot",
+        repo="keepassxc",
+        version="2.7.9",
+        folder="~/Softwares",
+        filenameFormat="KeePassXC-{{version}}-x86_64.AppImage",
+    )
+
+
+@pytest.fixture
+def latest_keepassxc():
+    return GithubSoftware(
+        name="KeepassXC",
+        owner="keepassxreboot",
+        repo="keepassxc",
+        version="latest",
+        folder="~/Softwares",
+        filenameFormat="KeePassXC-{{version}}-x86_64.AppImage",
+    )
+
+
+@pytest.fixture
+def keepassxc_not_present():
+    return GithubSoftware(
+        name="KeepassXC",
+        owner="keepassxreboot",
+        repo="keepassxc",
+        version="2.79",
+        folder="~/Softwares",
+        filenameFormat="KeePassXC-{{version}}-x86_64.AppImage",
+    )
+
+
+@pytest.fixture
+def local_file(keepassxc):
+    return LocalFile(keepassxc)
+
+
+@pytest.fixture
+def local_file_not_present(keepassxc_not_present):
+    return LocalFile(keepassxc_not_present)
+
+
+@pytest.fixture
+def software_to_update():
+    return GithubSoftware(
+        name="KeepassXC",
+        owner="keepassxreboot",
+        repo="keepassxc",
+        version="2.8.1",
+        folder="~/Softwares",
+        filenameFormat="KeePassXC-{{version}}-x86_64.AppImage",
+    )
+
+
+@pytest.fixture
+def software_up_to_date(keepassxc):
+    return keepassxc
+
+
+@pytest.fixture
+def asset():
+    return Asset(
+        name="KeePassXC-2.7.9-x86_64.AppImage.DIGEST",
+        url="https://api.github.com/repos/keepassxreboot/keepassxc/releases/assets/1747"
+        "89149",
+    )
+
+
+@pytest.fixture
+def keepassxc_digest():
+    return GithubSoftware(
+        name="KeepassXC digest",
+        owner="keepassxreboot",
+        repo="keepassxc",
+        version="2.7.7",
+        folder="~/Softwares",
+        filenameFormat="KeePassXC-{{version}}-x86_64.AppImage.DIGEST",
+    )
+
+
+@pytest.fixture
+def keepassxc_digest_file(keepassxc_digest):
+    return LocalFile(keepassxc_digest)
+
+
+@pytest.fixture
+def asset_to_write():
+    return Asset(
+        name="KeePassXC-2.7.7-x86_64.AppImage.DIGEST",
+        url="https://api.github.com/repos/keepassxreboot/keepassxc/releases/assets/1747"
+        "89149",
+        content=b"2a868b681a8ec4e381ac14203aec3d80ff6fa7a535fa102265a3ec9329b4b846  Kee"
+        b"PassXC-2.7.9-x86_64.AppImage\n",
+    )
diff --git a/test/losoup/software.yaml b/test/losoup/software.yaml
new file mode 100644
index 0000000..73cd9ff
--- /dev/null
+++ b/test/losoup/software.yaml
@@ -0,0 +1,16 @@
+software:
+  - name: NextCloud
+    cvs: github
+    owner: nextcloud-releases
+    repo: desktop
+    version: latest
+    folder: /home/stan/Softwares
+    filenameFormat:  KeePassXC-{{version}}-x86_64.AppImage
+
+  - name: KeePassXC
+    cvs: giTHub
+    owner: keepassxreboot
+    repo: keepassxc
+    version: latest
+    folder: /home/stan/Softwares
+    filenameFormat:  Nextcloud-{{version}}-x86_64.AppImage
diff --git a/test/losoup/test_github_connector.py b/test/losoup/test_github_connector.py
new file mode 100644
index 0000000..11d287a
--- /dev/null
+++ b/test/losoup/test_github_connector.py
@@ -0,0 +1,40 @@
+def test_github_connector_is_initialized(github_connector):
+    assert github_connector is not None
+    assert github_connector.settings.token is not None
+
+
+def test_get_latest_release(github_connector, latest_keepassxc):
+    release_assets = github_connector.get_release_assets_list(
+        latest_keepassxc.release_url
+    )
+    assert len(release_assets) == 27
+
+
+def test_get_some_release(github_connector, keepassxc):
+    release_asset_list = github_connector.get_release_assets_list(keepassxc.release_url)
+    assert len(release_asset_list) == 27
+
+
+def test_get_release_asset(github_connector, keepassxc):
+    release_asset = github_connector.get_release_asset(keepassxc)
+    assert release_asset.name == keepassxc.filename
+
+
+def test_download_release_asset(github_connector, asset):
+    release_asset_file = github_connector.download_release_asset(asset)
+    assert len(release_asset_file) == 98
+    assert (
+        release_asset_file
+        == b"2a868b681a8ec4e381ac14203aec3d80ff6fa7a535fa102265a3ec9329b4b846  KeePassX"
+        b"C-2.7.9-x86_64.AppImage\n"
+    )
+
+
+def test_download_software(github_connector, keepassxc_digest):
+    release_asset_file = github_connector.download_software(keepassxc_digest)
+    assert len(release_asset_file) == 98
+    assert (
+        release_asset_file
+        == b"796c4c0ad20b124476195dacd7f86c75be51cace1c734174ec293c46f41c3d05  KeePassX"
+        b"C-2.7.7-x86_64.AppImage\n"
+    )
diff --git a/test/losoup/test_local_files.py b/test/losoup/test_local_files.py
new file mode 100644
index 0000000..1dc00d1
--- /dev/null
+++ b/test/losoup/test_local_files.py
@@ -0,0 +1,27 @@
+from losoup.file_operations.local_files import LocalFile
+from losoup.models import Asset
+import typer
+
+
+def test_local_files_init(keepassxc):
+    local_file = LocalFile(keepassxc)
+    assert local_file.software == keepassxc
+
+
+def test_get_local_files(local_file):
+    assert "KeePassXC-2.7.9-x86_64.AppImage" in local_file.get_files_in_folder()
+
+
+def test_is_file_present(local_file):
+    assert local_file.is_file_present()
+
+
+def test_is_file_absent(local_file_not_present):
+    assert local_file_not_present.is_file_absent()
+
+
+def test_write_file(keepassxc_digest_file: LocalFile, asset_to_write: Asset):
+    assert keepassxc_digest_file.is_file_absent()
+    keepassxc_digest_file.write_file(asset_to_write)
+    assert keepassxc_digest_file.is_file_present()
+    keepassxc_digest_file.delete_file()
diff --git a/test/losoup/test_main.py b/test/losoup/test_main.py
new file mode 100644
index 0000000..e043ebd
--- /dev/null
+++ b/test/losoup/test_main.py
@@ -0,0 +1,29 @@
+from pathlib import Path
+
+from losoup import main
+from losoup.models import GithubSoftware
+
+
+def test_read_files():
+    cur_dir = Path(__file__).parent
+    software_file = cur_dir / "software.yaml"
+
+    files = main.load_software_list(software_file)
+
+    assert len(files) == 2
+
+    nextcloud = files[0]
+    assert nextcloud.name == "NextCloud"
+    assert isinstance(nextcloud, GithubSoftware)
+
+    keepassxc = files[1]
+    assert keepassxc.name == "KeePassXC"
+    assert isinstance(nextcloud, GithubSoftware)
+
+
+def test_software_needs_to_be_updated(software_to_update):
+    assert main.is_software_to_update(software_to_update)
+
+
+def test_software_does_not_need_to_be_updated(software_up_to_date):
+    assert not main.is_software_to_update(software_up_to_date)