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diff --git a/src/acmecli/metrics/__pycache__/license_metric.cpython-312.pyc b/src/acmecli/metrics/__pycache__/license_metric.cpython-312.pyc
index e38ef5c..29e722a 100644
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diff --git a/src/acmecli/metrics/code_quality_metric.py b/src/acmecli/metrics/code_quality_metric.py
index c628377..eae6f54 100644
--- a/src/acmecli/metrics/code_quality_metric.py
+++ b/src/acmecli/metrics/code_quality_metric.py
@@ -2,7 +2,6 @@
 from ..types import MetricValue
 from .base import register
 
-
 class CodeQualityMetric:
     """Metric to assess code style, maintainability, and engineering practices."""
     name = "code_quality"
@@ -13,7 +12,12 @@ def score(self, meta: dict) -> MetricValue:
         # Heuristics for code quality assessment
         score = 0.0
         
-        readme_text = meta.get('readme_text', '').lower()
+        readme_text = meta.get('readme_text')
+        if readme_text is not None:
+            readme_text = str(readme_text).lower()
+        else:
+            readme_text = ""
+        
         if readme_text:
             # Look for testing mentions
             testing_keywords = ['test', 'testing', 'pytest', 'unittest', 'coverage', 'ci', 'continuous integration']
@@ -41,7 +45,12 @@ def score(self, meta: dict) -> MetricValue:
                 score += 0.1
         
         # Check for popular programming language (better tooling/community)
-        language = meta.get('language', '').lower()
+        language = meta.get('language')
+        if language is not None:
+            language = str(language).lower()
+        else:
+            language = ""
+        
         popular_languages = ['python', 'javascript', 'java', 'c++', 'typescript', 'go', 'rust']
         if language in popular_languages:
             score += 0.1
@@ -74,5 +83,4 @@ def score(self, meta: dict) -> MetricValue:
         latency_ms = int((time.perf_counter() - t0) * 1000)
         return MetricValue(self.name, value, latency_ms)
 
-
 register(CodeQualityMetric())
\ No newline at end of file
diff --git a/test_url.txt b/test_url.txt
deleted file mode 100644
index be601e7..0000000
--- a/test_url.txt
+++ /dev/null
@@ -1 +0,0 @@
-https://github.com/pytorch/pytorch
diff --git a/urls.txt b/urls.txt
index 893da06..1dfb3fa 100644
--- a/urls.txt
+++ b/urls.txt
@@ -1,2 +1,10 @@
-https://github.com/octocat/Hello-World
-https://huggingface.co/google/gemma-3-270m
\ No newline at end of file
+https://github.com/pallets/flask
+https://github.com/tiangolo/fastapi
+https://github.com/huggingface/transformers
+https://github.com/psf/requests
+https://huggingface.co/gpt2
+https://huggingface.co/facebook/bart-large
+https://huggingface.co/google/vit-base-patch16-224
+https://github.com/numpy/numpy
+https://github.com/scikit-learn/scikit-learn
+https://github.com/pytorch/pytorch
\ No newline at end of file