Initial upload: git-insights-cli with CI/CD workflow

src/formatters/markdown_formatter.py

@@ -0,0 +1,65 @@
+from datetime import datetime
+from typing import Any
+
+from src.formatters.base import BaseFormatter
+
+
+class MarkdownFormatter(BaseFormatter):
+    """Markdown output formatter."""
+
+    @staticmethod
+    def format(data: Any) -> str:
+        """Format data as Markdown."""
+        lines = ["# Git Insights Report", f"Generated: {datetime.now().isoformat()}", ""]
+
+        if hasattr(data, "commit_analysis") and data.commit_analysis:
+            ca = data.commit_analysis
+            lines.extend([
+                "## Commit Analysis",
+                f"- **Total Commits**: {ca.total_commits}",
+                f"- **Unique Authors**: {ca.unique_authors}",
+                f"- **Avg Commits/Day**: {ca.average_commits_per_day:.1f}",
+                "",
+                "### Top Contributors",
+                "| Author | Commits |",
+                "|--------|---------|",
+            ])
+            for author in ca.top_authors[:5]:
+                lines.append(f"| {author.name} | {author.commit_count} |")
+            lines.append("")
+
+        if hasattr(data, "velocity_analysis") and data.velocity_analysis:
+            va = data.velocity_analysis
+            lines.extend([
+                "## Velocity Analysis",
+                f"- **Commits/Day**: {va.commits_per_day:.1f}",
+                f"- **Commits/Week**: {va.commits_per_week:.1f}",
+                f"- **Trend**: {va.velocity_trend}",
+                f"- **Most Active Day**: {va.most_active_day}",
+                "",
+            ])
+
+        if hasattr(data, "code_churn_analysis") and data.code_churn_analysis:
+            cc = data.code_churn_analysis
+            lines.extend([
+                "## Code Churn",
+                f"- **Lines Added**: {cc.total_lines_added:,}",
+                f"- **Lines Deleted**: {cc.total_lines_deleted:,}",
+                f"- **Net Change**: {cc.net_change:+,}",
+                f"- **Avg Churn/Commit**: {cc.average_churn_per_commit:.1f}",
+                "",
+            ])
+
+        if hasattr(data, "risky_commit_analysis") and data.risky_commit_analysis:
+            ra = data.risky_commit_analysis
+            lines.extend([
+                "## Risky Commits",
+                f"- **Total Risky**: {ra.total_risky_commits}",
+                f"- **Risk Score**: {ra.risk_score:.1f}%",
+                f"- **Large Changes**: {len(ra.large_change_commits)}",
+                f"- **Merge Commits**: {len(ra.merge_commits)}",
+                f"- **Reverts**: {len(ra.revert_commits)}",
+                "",
+            ])
+
+        return "\n".join(lines)