diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8fd7ab..33ca80b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - **GitHub language detection crashes with `TypeError`** when API response contains non-integer metadata keys (e.g., `"url"`) — now filters to integer values only (#322)
+- **C3.x codebase analysis crashes with `TypeError`** — `_run_c3_analysis()` and `_analyze_c3x()` passed removed `enhance_with_ai`/`ai_mode` kwargs to `analyze_codebase()` instead of `enhance_level` (#323)
 
 ## [3.4.0] - 2026-03-21
 
diff --git a/src/skill_seekers/cli/unified_codebase_analyzer.py b/src/skill_seekers/cli/unified_codebase_analyzer.py
index 168ef2b..3b002c3 100644
--- a/src/skill_seekers/cli/unified_codebase_analyzer.py
+++ b/src/skill_seekers/cli/unified_codebase_analyzer.py
@@ -267,8 +267,7 @@ class UnifiedCodebaseAnalyzer:
                 extract_test_examples=True,
                 build_how_to_guides=True,
                 extract_config_patterns=True,
-                enhance_with_ai=False,  # Disable AI for speed
-                ai_mode="none",
+                enhance_level=0,  # Disable AI for speed
             )
 
             # Load C3.x results from output files
diff --git a/src/skill_seekers/cli/unified_scraper.py b/src/skill_seekers/cli/unified_scraper.py
index 02057c4..42c4d3c 100644
--- a/src/skill_seekers/cli/unified_scraper.py
+++ b/src/skill_seekers/cli/unified_scraper.py
@@ -1539,8 +1539,8 @@ class UnifiedScraper:
                 extract_test_examples=True,  # C3.2: Test examples
                 build_how_to_guides=True,  # C3.3: How-to guides
                 extract_config_patterns=True,  # C3.4: Config patterns
-                enhance_with_ai=source.get("ai_mode", "auto") != "none",
-                ai_mode=source.get("ai_mode", "auto"),
+                extract_docs=True,
+                enhance_level=0 if source.get("ai_mode", "auto") == "none" else 2,
             )
 
             # Load C3.x outputs into memory
diff --git a/tests/test_c3_integration.py b/tests/test_c3_integration.py
index b7cf547..41b3ab4 100644
--- a/tests/test_c3_integration.py
+++ b/tests/test_c3_integration.py
@@ -358,5 +358,47 @@ class TestC3Integration:
         assert "references/codebase_analysis/ARCHITECTURE.md" in content
 
 
+class TestC3AnalyzeCodebaseSignature:
+    """Verify _run_c3_analysis passes valid kwargs to analyze_codebase (#323)."""
+
+    @pytest.fixture
+    def temp_dir(self):
+        """Create temporary directory for tests."""
+        temp = tempfile.mkdtemp()
+        yield temp
+        shutil.rmtree(temp, ignore_errors=True)
+
+    def test_run_c3_analysis_uses_enhance_level_not_old_kwargs(self, temp_dir):
+        """_run_c3_analysis must pass enhance_level, not enhance_with_ai/ai_mode."""
+        config_path = os.path.join(temp_dir, "config.json")
+        config = {
+            "name": "test",
+            "description": "Test",
+            "sources": [{"type": "github", "repo": "test/repo", "ai_mode": "none"}],
+        }
+        with open(config_path, "w") as f:
+            json.dump(config, f)
+
+        scraper = UnifiedScraper(config_path)
+
+        captured_kwargs = {}
+
+        def fake_analyze(**kwargs):
+            captured_kwargs.update(kwargs)
+            return {}
+
+        with patch("skill_seekers.cli.codebase_scraper.analyze_codebase", fake_analyze):
+            scraper._run_c3_analysis(str(temp_dir), config["sources"][0])
+
+        assert "enhance_with_ai" not in captured_kwargs, (
+            "enhance_with_ai is not a valid analyze_codebase() parameter"
+        )
+        assert "ai_mode" not in captured_kwargs, (
+            "ai_mode is not a valid analyze_codebase() parameter"
+        )
+        assert "enhance_level" in captured_kwargs
+        assert captured_kwargs["enhance_level"] == 0  # ai_mode "none" → enhance_level 0
+
+
 if __name__ == "__main__":
     pytest.main([__file__, "-v"])
diff --git a/tests/test_unified_scraper_orchestration.py b/tests/test_unified_scraper_orchestration.py
index ec57855..da2f8b0 100644
--- a/tests/test_unified_scraper_orchestration.py
+++ b/tests/test_unified_scraper_orchestration.py
@@ -472,6 +472,31 @@ class TestScrapeLocal:
 
         assert captured_kwargs.get("enhance_level") == 3
 
+    def test_analyze_codebase_not_called_with_old_kwargs(self, tmp_path, monkeypatch):
+        """analyze_codebase() must not receive enhance_with_ai or ai_mode (#323)."""
+        scraper = _make_scraper(tmp_path=tmp_path)
+        source = {"type": "local", "path": str(tmp_path)}
+
+        captured_kwargs = {}
+
+        def fake_analyze(**kwargs):
+            captured_kwargs.update(kwargs)
+
+        monkeypatch.setattr(
+            "skill_seekers.cli.codebase_scraper.analyze_codebase",
+            fake_analyze,
+        )
+
+        scraper._scrape_local(source)
+
+        assert "enhance_with_ai" not in captured_kwargs, (
+            "enhance_with_ai is not a valid analyze_codebase() parameter"
+        )
+        assert "ai_mode" not in captured_kwargs, (
+            "ai_mode is not a valid analyze_codebase() parameter"
+        )
+        assert "enhance_level" in captured_kwargs
+
 
 # ===========================================================================
 # 6. run() orchestration