fix: Resolve PDF processing (#267), How-To Guide (#242), Chinese README (#260) + code quality (#273)

Thanks @franklegolasyoung for the excellent work on the core fixes for issues #267, #242, and #260! 🙏

Your comprehensive approach to fixing PDF processing, expanding workflow detection, and improving the Chinese README documentation is much appreciated. I've added code quality fixes and comprehensive tests to ensure everything passes CI.

All 1266+ tests are now passing, and the issues are resolved! 🎉

tests/test_analyze_e2e.py

@@ -83,11 +83,7 @@ class TestApplication(unittest.TestCase):
         """Run skill-seekers command and return result."""
         cmd = ["skill-seekers"] + list(args)
         result = subprocess.run(
-            cmd,
-            capture_output=True,
-            text=True,
-            timeout=timeout,
-            cwd=str(self.test_dir)
+            cmd, capture_output=True, text=True, timeout=timeout, cwd=str(self.test_dir)
         )
         return result
 
@@ -112,15 +108,15 @@ class TestApplication(unittest.TestCase):
         output_dir = self.test_dir / "output_quick"
 
         result = self.run_command(
-            "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
-            "--quick"
+            "analyze", "--directory", str(self.test_dir), "--output", str(output_dir), "--quick"
         )
 
         # Check command succeeded
-        self.assertEqual(result.returncode, 0,
-                        f"Quick analysis failed:\nSTDOUT: {result.stdout}\nSTDERR: {result.stderr}")
+        self.assertEqual(
+            result.returncode,
+            0,
+            f"Quick analysis failed:\nSTDOUT: {result.stdout}\nSTDERR: {result.stderr}",
+        )
 
         # Verify output directory was created
         self.assertTrue(output_dir.exists(), "Output directory not created")
@@ -146,10 +142,7 @@ class TestApplication(unittest.TestCase):
         output_dir = self.test_dir / "custom_output"
 
         result = self.run_command(
-            "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
-            "--quick"
+            "analyze", "--directory", str(self.test_dir), "--output", str(output_dir), "--quick"
         )
 
         self.assertEqual(result.returncode, 0, f"Analysis failed: {result.stderr}")
@@ -162,30 +155,31 @@ class TestApplication(unittest.TestCase):
 
         result = self.run_command(
             "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
+            "--directory",
+            str(self.test_dir),
+            "--output",
+            str(output_dir),
             "--quick",
             "--skip-patterns",
-            "--skip-test-examples"
+            "--skip-test-examples",
         )
 
         self.assertEqual(result.returncode, 0, f"Analysis with skip flags failed: {result.stderr}")
-        self.assertTrue((output_dir / "SKILL.md").exists(), "SKILL.md not generated with skip flags")
+        self.assertTrue(
+            (output_dir / "SKILL.md").exists(), "SKILL.md not generated with skip flags"
+        )
 
     def test_analyze_invalid_directory(self):
         """Test analysis with non-existent directory."""
         result = self.run_command(
-            "analyze",
-            "--directory", "/nonexistent/directory/path",
-            "--quick",
-            timeout=10
+            "analyze", "--directory", "/nonexistent/directory/path", "--quick", timeout=10
         )
 
         # Should fail with error
         self.assertNotEqual(result.returncode, 0, "Should fail with invalid directory")
         self.assertTrue(
             "not found" in result.stderr.lower() or "does not exist" in result.stderr.lower(),
-            f"Expected directory error, got: {result.stderr}"
+            f"Expected directory error, got: {result.stderr}",
         )
 
     def test_analyze_missing_directory_arg(self):
@@ -196,7 +190,7 @@ class TestApplication(unittest.TestCase):
         self.assertNotEqual(result.returncode, 0, "Should fail without --directory")
         self.assertTrue(
             "required" in result.stderr.lower() or "directory" in result.stderr.lower(),
-            f"Expected missing argument error, got: {result.stderr}"
+            f"Expected missing argument error, got: {result.stderr}",
         )
 
     def test_backward_compatibility_depth_flag(self):
@@ -205,9 +199,12 @@ class TestApplication(unittest.TestCase):
 
         result = self.run_command(
             "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
-            "--depth", "surface"
+            "--directory",
+            str(self.test_dir),
+            "--output",
+            str(output_dir),
+            "--depth",
+            "surface",
         )
 
         self.assertEqual(result.returncode, 0, f"Depth flag failed: {result.stderr}")
@@ -218,10 +215,7 @@ class TestApplication(unittest.TestCase):
         output_dir = self.test_dir / "output_refs"
 
         result = self.run_command(
-            "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
-            "--quick"
+            "analyze", "--directory", str(self.test_dir), "--output", str(output_dir), "--quick"
         )
 
         self.assertEqual(result.returncode, 0, f"Analysis failed: {result.stderr}")
@@ -236,10 +230,7 @@ class TestApplication(unittest.TestCase):
         output_dir = self.test_dir / "output_structure"
 
         result = self.run_command(
-            "analyze",
-            "--directory", str(self.test_dir),
-            "--output", str(output_dir),
-            "--quick"
+            "analyze", "--directory", str(self.test_dir), "--output", str(output_dir), "--quick"
         )
 
         self.assertEqual(result.returncode, 0, f"Analysis failed: {result.stderr}")
@@ -262,15 +253,11 @@ class TestAnalyzeOldCommand(unittest.TestCase):
     def test_old_command_still_exists(self):
         """Test that skill-seekers-codebase still exists."""
         result = subprocess.run(
-            ["skill-seekers-codebase", "--help"],
-            capture_output=True,
-            text=True,
-            timeout=5
+            ["skill-seekers-codebase", "--help"], capture_output=True, text=True, timeout=5
         )
 
         # Command should exist and show help
-        self.assertEqual(result.returncode, 0,
-                        f"Old command doesn't work: {result.stderr}")
+        self.assertEqual(result.returncode, 0, f"Old command doesn't work: {result.stderr}")
         self.assertIn("--directory", result.stdout)
 
 
@@ -300,14 +287,17 @@ def hello():
         # Run analysis
         result = subprocess.run(
             [
-                "skill-seekers", "analyze",
-                "--directory", str(self.test_dir),
-                "--output", str(output_dir),
-                "--quick"
+                "skill-seekers",
+                "analyze",
+                "--directory",
+                str(self.test_dir),
+                "--output",
+                str(output_dir),
+                "--quick",
             ],
             capture_output=True,
             text=True,
-            timeout=120
+            timeout=120,
         )
 
         self.assertEqual(result.returncode, 0, f"Analysis failed: {result.stderr}")
@@ -329,15 +319,18 @@ def hello():
 
         result = subprocess.run(
             [
-                "skill-seekers", "analyze",
-                "--directory", str(self.test_dir),
-                "--output", str(output_dir),
+                "skill-seekers",
+                "analyze",
+                "--directory",
+                str(self.test_dir),
+                "--output",
+                str(output_dir),
                 "--quick",
-                "--verbose"
+                "--verbose",
             ],
             capture_output=True,
             text=True,
-            timeout=120
+            timeout=120,
         )
 
         self.assertEqual(result.returncode, 0, f"Verbose analysis failed: {result.stderr}")