Initial commit: GitHub Release Monitor CLI tool

CLI tool that tracks GitHub releases or tags from user-defined repositories
and exposes them as a subscribable RSS 2.0 feed.

Features:
- Track releases or tags per repository
- SQLite storage with automatic deduplication
- RSS 2.0 feed with markdown-stripped release notes
- Built-in HTTP server for local feed access
- Rate-limit-aware GitHub API client
- 64 passing tests

tests/test_cli.py

@@ -0,0 +1,86 @@
+"""Tests for CLI commands."""
+
+import sqlite3
+import subprocess
+import sys
+import tempfile
+
+import pytest
+
+from src.db import _create_tables, add_repo
+
+
+class TestRepoFormatValidation:
+    def test_valid_format(self):
+        from src.cli import REPO_PATTERN
+        assert REPO_PATTERN.match("owner/repo")
+        assert REPO_PATTERN.match("my-org/my_repo")
+        assert REPO_PATTERN.match("a.b/c-d_e")
+
+    def test_invalid_format(self):
+        from src.cli import REPO_PATTERN
+        assert not REPO_PATTERN.match("owner")
+        assert not REPO_PATTERN.match("repo")
+        assert not REPO_PATTERN.match("owner/repo/extra")
+
+
+class TestParseSince:
+    def test_hours(self):
+        from src.cli import parse_since
+        from datetime import timedelta
+        assert parse_since("24h") == timedelta(hours=24)
+
+    def test_days(self):
+        from src.cli import parse_since
+        from datetime import timedelta
+        assert parse_since("2d") == timedelta(days=2)
+
+    def test_minutes(self):
+        from src.cli import parse_since
+        from datetime import timedelta
+        assert parse_since("30m") == timedelta(minutes=30)
+
+    def test_invalid_defaults(self):
+        from src.cli import parse_since
+        from datetime import timedelta
+        assert parse_since("invalid") == timedelta(hours=24)
+
+
+class TestCliHelp:
+    def test_help_flag(self):
+        result = subprocess.run(
+            [sys.executable, "-m", "src.cli", "--help"],
+            capture_output=True, text=True
+        )
+        assert result.returncode == 0
+        assert "ghrel" in result.stdout.lower() or "track" in result.stdout.lower()
+
+    def test_version_flag(self):
+        result = subprocess.run(
+            [sys.executable, "-m", "src.cli", "--version"],
+            capture_output=True, text=True
+        )
+        assert result.returncode == 0
+        assert "0.1.0" in result.stdout
+
+
+class TestCliList:
+    def test_list_empty(self, tmp_path):
+        db_path = str(tmp_path / "test.db")
+        result = subprocess.run(
+            [sys.executable, "-m", "src.cli", "--db-path", db_path, "list"],
+            capture_output=True, text=True
+        )
+        assert result.returncode == 0
+        assert "No repositories" in result.stdout
+
+
+class TestCliAddRemove:
+    def test_add_invalid_format(self, tmp_path):
+        db_path = str(tmp_path / "test.db")
+        result = subprocess.run(
+            [sys.executable, "-m", "src.cli", "--db-path", db_path, "add", "invalid"],
+            capture_output=True, text=True
+        )
+        assert result.returncode != 0
+        assert "Invalid repo format" in result.stderr