diff --git a/.cookiecutter/includes/setuptools/install_requires b/.cookiecutter/includes/setuptools/install_requires
deleted file mode 100644
index f229360..0000000
--- a/.cookiecutter/includes/setuptools/install_requires
+++ /dev/null
@@ -1 +0,0 @@
-requests
diff --git a/setup.cfg b/setup.cfg
index f1872cd..ec7c6c0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,7 +18,6 @@ package_dir =
 packages = find:
 python_requires = >=3.11
 install_requires =
-    requests
 
 [options.packages.find]
 where = src
diff --git a/src/dependabot_alerts/cli.py b/src/dependabot_alerts/cli.py
index f245b93..08e9182 100644
--- a/src/dependabot_alerts/cli.py
+++ b/src/dependabot_alerts/cli.py
@@ -1,49 +1,13 @@
 from argparse import ArgumentParser
 from importlib.metadata import version
 
-from dependabot_alerts.core import GitHubClient, Vulnerability, fetch_alerts
 
-
-def cli(_argv=None):  # pragma: no cover
+def cli(_argv=None):  # pylint:disable=inconsistent-return-statements
     parser = ArgumentParser()
-    parser.add_argument(
-        "-v", "--version", action="version", version=version("dependabot-alerts")
-    )
-    parser.add_argument("organization", help="GitHub user or organization")
+    parser.add_argument("-v", "--version", action="store_true")
 
     args = parser.parse_args(_argv)
 
-    gh_client = GitHubClient.init()
-    vulns = fetch_alerts(gh_client, args.organization)
-    print(format_slack_message(args.organization, vulns))
-
-    return 0
-
-
-def format_slack_message(
-    organization: str, vulns: list[Vulnerability]
-) -> str:  # pragma: no cover
-    """
-    Format a Slack status report from a list of vulnerabilities.
-
-    Returns a message using Slack's "mrkdwn" format. See
-    https://api.slack.com/reference/surfaces/formatting.
-    """
-    if not vulns:
-        return "Found no open vulnerabilities."
-
-    n_repos = len(set(vuln.repo for vuln in vulns))
-
-    msg_parts = []
-    msg_parts.append(f"*Found {len(vulns)} vulnerabilities in {n_repos} repositories.*")
-
-    for vuln in vulns:
-        vuln_msg = []
-        vuln_msg.append(
-            f"{organization}/{vuln.repo}: <{vuln.url}|{vuln.package_name} {vuln.severity} - {vuln.title}>"
-        )
-        if vuln.pr:
-            vuln_msg.append(f"  Resolved by {vuln.pr}")
-        msg_parts.append("\n".join(vuln_msg))
-
-    return "\n\n".join(msg_parts)
+    if args.version:
+        print(version("dependabot-alerts"))
+        return 0
diff --git a/src/dependabot_alerts/core.py b/src/dependabot_alerts/core.py
index c28f5f7..d1b7a0d 100644
--- a/src/dependabot_alerts/core.py
+++ b/src/dependabot_alerts/core.py
@@ -1,184 +1,2 @@
-import json
-import os
-from dataclasses import dataclass
-from getpass import getpass
-from typing import Optional
-
-import requests
-
-
-class GitHubClient:  # pragma: no cover
-    """
-    Client for GitHub's GraphQL API.
-
-    See https://docs.github.com/en/graphql.
-    """
-
-    def __init__(self, token):
-        self.token = token
-        self.endpoint = "https://api.github.com/graphql"
-
-    def query(self, query, variables=None):
-        data = {"query": query, "variables": variables if variables is not None else {}}
-        result = requests.post(
-            url=self.endpoint,
-            headers={"Authorization": f"Bearer {self.token}"},
-            data=json.dumps(data),
-            timeout=(30, 30),
-        )
-        body = result.json()
-        result.raise_for_status()
-        if "errors" in body:
-            errors = body["errors"]
-            raise RuntimeError(f"Query failed: {json.dumps(errors)}")
-        return body["data"]
-
-    @classmethod
-    def init(cls):
-        """
-        Initialize an authenticated GitHubClient.
-
-        This will read from the `GITHUB_TOKEN` env var if set, or prompt for
-        a token otherwise.
-        """
-        access_token = os.environ.get("GITHUB_TOKEN")
-        if not access_token:
-            access_token = getpass("GitHub API token: ")
-        return GitHubClient(access_token)
-
-
-@dataclass
-class Vulnerability:  # pylint:disable=too-many-instance-attributes
-    repo: str
-    """Repository where this vulnerability was reported."""
-
-    created_at: str
-    """ISO date when this alert was created."""
-
-    package_name: str
-    """Name of the vulnerable package."""
-
-    ecosystem: str
-    """Package ecosytem (eg. npm) that the package comes from."""
-
-    severity: str
-    """Vulnerability severity level."""
-
-    version_range: str
-    """Version ranges of package affected by vulnerability."""
-
-    number: str
-    """Number of this vulnerability report."""
-
-    url: str
-    """Link to the vulernability report on GitHub."""
-
-    pr: Optional[str]
-    """Link to the Dependabot update PR that resolves this vulnerability."""
-
-    title: str
-    """Summary of what the vulnerability is."""
-
-
-def fetch_alerts(
-    gh: GitHubClient, organization: str
-) -> list[Vulnerability]:  # pragma: no cover
-    """
-    Fetch details of all open vulnerability alerts in `organization`.
-
-    To reduce the volume of noise, especially for repositories which include the
-    same dependency in multiple lockfiles, only one vulnerability is reported
-    per package per repository.
-
-    Vulnerabilities are not reported from archived repositories.
-    """
-    # pylint:disable=too-many-locals
-
-    query = """
-query($organization: String!, $cursor: String) {
-  organization(login: $organization) {
-    repositories(first: 100, after: $cursor) {
-      pageInfo {
-        endCursor
-        hasNextPage
-      }
-      nodes {
-        name
-        vulnerabilityAlerts(first: 100, states:OPEN) {
-          nodes {
-            number
-            createdAt
-            dependabotUpdate {
-              pullRequest {
-                url
-              }
-            }
-            securityAdvisory {
-              summary
-            }
-            securityVulnerability {
-              package {
-                name
-                ecosystem
-              }
-              severity
-              vulnerableVersionRange
-            }
-          }
-        }
-      }
-    }
-  }
-}
-"""
-
-    vulns = []
-    cursor = None
-    has_next_page = True
-
-    while has_next_page:
-        result = gh.query(
-            query=query, variables={"organization": organization, "cursor": cursor}
-        )
-        page_info = result["organization"]["repositories"]["pageInfo"]
-        cursor = page_info["endCursor"]
-        has_next_page = page_info["hasNextPage"]
-
-        for repo in result["organization"]["repositories"]["nodes"]:
-            alerts = repo["vulnerabilityAlerts"]["nodes"]
-
-            if alerts:
-                repo_name = repo["name"]
-                vulnerable_packages = set()
-
-                for alert in alerts:
-                    sa = alert["securityAdvisory"]
-                    sv = alert["securityVulnerability"]
-                    number = alert["number"]
-                    package_name = sv["package"]["name"]
-
-                    if package_name in vulnerable_packages:
-                        continue
-                    vulnerable_packages.add(package_name)
-
-                    pr = None
-
-                    dep_update = alert["dependabotUpdate"]
-                    if dep_update and dep_update["pullRequest"]:
-                        pr = dep_update["pullRequest"]["url"]
-
-                    vuln = Vulnerability(
-                        repo=repo_name,
-                        created_at=alert["createdAt"],
-                        ecosystem=sv["package"]["ecosystem"],
-                        number=number,
-                        package_name=sv["package"]["name"],
-                        pr=pr,
-                        severity=sv["severity"],
-                        title=sa["summary"],
-                        url=f"https://github.com/{organization}/{repo_name}/security/dependabot/{number}",
-                        version_range=sv["vulnerableVersionRange"],
-                    )
-                    vulns.append(vuln)
-
-    return vulns
+def hello_world():
+    return "Hello, world!"
diff --git a/tests/unit/dependabot_alerts/cli_test.py b/tests/unit/dependabot_alerts/cli_test.py
index e7816ae..941bec9 100644
--- a/tests/unit/dependabot_alerts/cli_test.py
+++ b/tests/unit/dependabot_alerts/cli_test.py
@@ -5,6 +5,10 @@
 from dependabot_alerts.cli import cli
 
 
+def test_it():
+    cli([])
+
+
 def test_help():
     with pytest.raises(SystemExit) as exc_info:
         cli(["--help"])
@@ -13,8 +17,7 @@ def test_help():
 
 
 def test_version(capsys):
-    with pytest.raises(SystemExit) as exc_info:
-        cli(["--version"])
+    exit_code = cli(["--version"])
 
     assert capsys.readouterr().out.strip() == version("dependabot-alerts")
-    assert not exc_info.value.code
+    assert not exit_code
diff --git a/tests/unit/dependabot_alerts/core_test.py b/tests/unit/dependabot_alerts/core_test.py
new file mode 100644
index 0000000..efa2fa6
--- /dev/null
+++ b/tests/unit/dependabot_alerts/core_test.py
@@ -0,0 +1,6 @@
+from dependabot_alerts.core import hello_world
+
+
+class TestHelloWorld:
+    def test_it(self):
+        assert hello_world() == "Hello, world!"