Initial commit: Add shell-memory-cli project

A CLI tool that learns from terminal command patterns to automate repetitive workflows.

Features:
- Command recording with tags and descriptions
- Pattern detection for command sequences
- Session recording and replay
- Natural language script generation

tests/test_patterns.py

@@ -0,0 +1,63 @@
+"""Tests for pattern detection."""
+
+import pytest
+import tempfile
+import os
+import sys
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from shell_memory.database import Database
+from shell_memory.patterns import PatternDetector
+from shell_memory.commands import CommandLibrary
+
+
+@pytest.fixture
+def db_with_commands():
+    with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
+        db_path = f.name
+    db = Database(db_path)
+    lib = CommandLibrary(db)
+    for i in range(10):
+        lib.add(f"command_{i}")
+    yield db
+    os.unlink(db_path)
+
+
+class TestPatternDetector:
+    def test_analyze_recent_commands_empty(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        patterns = detector.analyze_recent_commands(limit=10)
+        assert isinstance(patterns, list)
+
+    def test_analyze_recent_commands_with_data(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        patterns = detector.analyze_recent_commands(limit=50)
+        assert isinstance(patterns, list)
+
+    def test_get_detected_patterns(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        patterns = detector.get_detected_patterns()
+        assert isinstance(patterns, list)
+
+    def test_suggest_shortcuts(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        shortcuts = detector.suggest_shortcuts()
+        assert isinstance(shortcuts, list)
+
+    def test_get_workflow_stats(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        stats = detector.get_workflow_stats(days=7)
+        assert "total_commands" in stats
+        assert "patterns_found" in stats
+
+
+class TestPatternNgramDetection:
+    def test_ngram_patterns_creation(self, db_with_commands):
+        detector = PatternDetector(db_with_commands)
+        detector.min_frequency = 2
+        detector.window_size = 3
+        commands = db_with_commands.get_all_commands()
+        command_ids = [cmd.id for cmd in commands if cmd.id is not None]
+        if len(command_ids) >= 3:
+            result = detector._find_ngram_patterns(command_ids)
+            assert isinstance(result, list)