diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..a7347f1
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,150 @@
+name: CI
+
+on:
+ pull_request:
+ branches: [main]
+
+permissions:
+ contents: read
+ pull-requests: write
+
+jobs:
+ test:
+ name: Test & Coverage
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Checkout
+ uses: actions/checkout@v4
+
+ - name: Set up Go
+ uses: actions/setup-go@v5
+ with:
+ go-version-file: go.mod
+
+ - name: Run tests with coverage
+ id: test
+ run: |
+ go vet ./...
+
+ set +e
+ go test ./... -coverprofile=coverage.out -covermode=atomic > test-output.txt 2>&1
+ exit_code=$?
+ set -e
+
+ total=$(go tool cover -func=coverage.out | grep total | awk '{print $NF}')
+ echo "coverage=$total" >> $GITHUB_OUTPUT
+ echo "exit_code=$exit_code" >> $GITHUB_OUTPUT
+
+ go tool cover -func=coverage.out > coverage_detail.txt
+
+ EXIT_CODE=$exit_code TOTAL=$total python3 << 'PYEOF'
+ import os, re
+
+ exit_code = int(os.environ.get("EXIT_CODE", "0"))
+ total = os.environ.get("TOTAL", "0.0%")
+
+ # Parse go tool cover -func output
+ with open("coverage_detail.txt") as f:
+ lines = f.readlines()
+
+ pkg_data = {}
+ for line in lines:
+ if not line.strip() or "total" in line.lower():
+ continue
+ # Format: path/file.go:line: func pct%
+ parts = line.split()
+ if len(parts) < 2:
+ continue
+ file_func = parts[0]
+ pct_str = parts[-1].rstrip('%')
+ try:
+ pct = float(pct_str)
+ except ValueError:
+ continue
+
+ # Extract package path
+ if ':' in file_func:
+ file_path = file_func.split(':')[0]
+ else:
+ continue
+
+ # Normalize package
+ if file_path.startswith("github.com/"):
+ segments = file_path.split("/")
+ if "internal" in segments:
+ idx = segments.index("internal")
+ # Keep internal/subpackage structure
+ pkg = "/".join(segments[:idx+2]) if idx+1 < len(segments) else file_path
+ else:
+ pkg = "/".join(segments[:-1])
+ if not pkg:
+ pkg = "github.com/PyratLabs/ugo"
+ else:
+ pkg = file_path
+
+ if pkg not in pkg_data:
+ pkg_data[pkg] = []
+ pkg_data[pkg].append(pct)
+
+ # Write report
+ with open("report.md", "w") as f:
+ f.write("## Test Results\n\n")
+
+ if exit_code == 0:
+ f.write("✅ **All tests passed**\n\n")
+ else:
+ f.write("❌ **Some tests failed**\n\n")
+ f.write("Test output
\n\n")
+ f.write("```\n")
+ with open("test-output.txt") as tf:
+ f.write(tf.read())
+ f.write("```\n\n")
+ f.write("