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>

context-migration/memory/feedback_isolate_rebar_layers_gotcha.md

@@ -0,0 +1,11 @@
+---
+name: feedback-isolate-rebar-layers-gotcha
+description: When isolating rebar in the P1 model, the C12~C18 stirrup content lives on layer P1_두부(코핑) — never turn that layer off; hide the concrete objects individually
+metadata:
+  type: feedback
+---
+
+All leaf objects inside the C12~C18 block definitions (152/137/130/338/130/137/152 leaves) are on layer `P1_두부(코핑)` (ColorFromParent, so they draw in the mark layer's colour). Turning that layer off makes the stirrups vanish even though layers C12_H22…C18_H22 are on (user: "철근이 켜져있는데 안보여 … 다 어디로 날려보냈니?"). C1~C11 and C19~C25 leaves sit on their own mark layers and are fine.
+
+**Why:** happened 2026-10-06 when the user asked "C22,C24 철근이랑 주철근만 켜줘" and I hid every other layer; cost several turns of debugging (I first blamed camera positions/zoom).
+**How to apply:** to show rebar only, keep `P1_두부(코핑)` ON and hide its 3 objects (coping solid + 2 construction lines) with rs.HideObject; the user restores with Show. Also remember `doc.Objects` iteration skips objects on off layers unless ObjectEnumeratorSettings.HiddenObjects=True. Previous visibility state of all layers: `261006_layer_visibility_before_isolate.json` in the drawings folder. See [[project-p1-final-model-state-261006]].