chore(rebar): Pier_T_rebar 작업 폴더 초기 구성 및 외부 의존 파일 통합

- Code\rebar_pipeline, review_pipeline, pier-program을 정션에서 실제 폴더로 전환
- Code\rhino_mcp 및 CLAUDE_rhino배경.md 추가, .mcp.json은 PYTHONPATH로 새 위치 사용
- pier-program 내부 .git 제거(이력은 backup\pier-program_20261028.bundle에 보관)
- worktree 가이드 반영(CLAUDE.local.md, HANDOFF.md)
- D:\Rhino-MCP 경로 참조를 새 위치로 치환

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.hmcmkit/tools/graph_index.py

@@ -0,0 +1,43 @@
+import os
+import sys
+
+def generate_graph_index(root_path=".hmcmkit"):
+    index_content = ["# HMCMkit Knowledge Graph Index", "", "> Automatically generated index of all knowledge assets.", ""]
+    
+    # Simple tree walk
+    for root, dirs, files in os.walk(root_path):
+        # Filter hidden
+        dirs[:] = [d for d in dirs if not d.startswith('.')]
+        files = [f for f in files if not f.startswith('.')]
+        
+        rel_path = os.path.relpath(root, root_path)
+        if rel_path == ".":
+            level = 0
+            rel_path = ""
+        else:
+            level = rel_path.count(os.sep) + 1
+            
+        indent = "  " * level
+        folder_name = os.path.basename(root)
+        if folder_name != ".hmcmkit" and rel_path != "":
+             index_content.append(f"{indent}- 📂 **{folder_name}/**")
+        
+        sub_indent = "  " * (level + 1)
+        for f in files:
+            if f.endswith(".md") or f.endswith(".json") or f.endswith(".py"):
+                 link_path = os.path.join(root, f).replace("\\", "/") # POSIX style for links
+                 # Make link relative to where _GRAPH-INDEX.md will be (in system/)
+                 # Actually, let's just use the path from project root for clarity in Antigravity context
+                 index_content.append(f"{sub_indent}- [{f}]({link_path})")
+                 
+    output_path = os.path.join(root_path, "system", "_GRAPH-INDEX.md")
+    os.makedirs(os.path.dirname(output_path), exist_ok=True)
+    
+    with open(output_path, 'w', encoding='utf-8') as f:
+        f.write("\n".join(index_content))
+        
+    print(f"✅ Generated Graph Index at: {output_path}")
+
+if __name__ == "__main__":
+    target = sys.argv[1] if len(sys.argv) > 1 else ".hmcmkit"
+    generate_graph_index(target)