Go to market

.github/workflows/auto-release.yml

@@ -20,12 +20,12 @@ jobs:
       should-release: ${{ steps.check.outputs.should_release }}
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0  # Need full history to compare versions
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -85,10 +85,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -112,10 +112,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -128,7 +128,7 @@ jobs:
       run: poetry build
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v4
       with:
         name: dist
         path: dist/
@@ -139,7 +139,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Create and push tag
       run: |
@@ -159,10 +159,10 @@ jobs:
       url: https://pypi.org/project/datacheck-cli/
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -185,7 +185,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 

.github/workflows/ci.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -37,10 +37,10 @@ jobs:
     needs: [lint]
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
 
@@ -53,7 +53,7 @@ jobs:
       run: poetry build
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v4
       with:
         name: dist
         path: dist/

.github/workflows/pr-version-check.yml

@@ -11,12 +11,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0  # Need full history to compare with base branch
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 

.github/workflows/release.yml

@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -40,10 +40,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -56,7 +56,7 @@ jobs:
       run: poetry build
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v4
       with:
         name: dist
         path: dist/
@@ -69,10 +69,10 @@ jobs:
       url: https://pypi.org/project/datacheck/
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v6
+      uses: actions/setup-python@v5
       with:
         python-version: "3.12"
 
@@ -94,7 +94,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0  # Fetch all history for changelog
 
@@ -134,7 +134,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v4
 
     - name: Extract version from tag
       id: version

.github/workflows/security.yml

@@ -20,10 +20,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: "3.11"
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Upload Bandit report
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v4
         with:
           name: bandit-report
           path: bandit-report.json
@@ -56,10 +56,10 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: "3.11"
 
@@ -86,15 +86,15 @@ jobs:
 
       - name: Upload Safety report
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v4
         with:
           name: safety-report
           path: safety-report.json
           retention-days: 30
 
       - name: Upload pip-audit report
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v4
         with:
           name: pip-audit-report
           path: pip-audit-report.json
@@ -106,7 +106,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -129,7 +129,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3

.gitignore

@@ -151,4 +151,9 @@ init_db.py
 
 examples/
 .claude/
-.datacheck/
+.datacheck/
+
+# Test suite — exclude runtime artifacts
+testing/venv/
+testing/csv/results/
+testing/parquet/results/

CHANGELOG.md

@@ -51,7 +51,6 @@ DataCheck v2.0.0 is the first major release under the new product vision: a focu
   - All data loaders now use `dtype_backend="pyarrow"` for Arrow-backed DataFrames
   - CSV loader uses `engine="pyarrow"` for 2-5x faster parsing
   - Parquet loader skips Arrow-to-NumPy conversion (~30% faster)
-  - DuckDB, Delta Lake, and Avro loaders also use Arrow backend
   - 2-5x memory reduction for string-heavy datasets
 
 - **CLI Support for `sum_equals` Rule**