chore: initial commit — portable agent memory & skill scaffold

Extracted and cleaned up from a prior WSL/Windows agent-memory setup.
Contains only project-agnostic content:

- Claude_Memory/: feedback rules, user profile, reusable reference docs,
  session scratch space (claude_info/, claude_log/), mirrored skill defs
- caveman/: ultra-compressed communication mode skill + subcommands
- html-slide-deck/: self-contained HTML slide deck builder skill

Project-specific knowledge (previously mixed in) was moved out to each
project's own repository as part of this cleanup.

Claude_Memory/claude_info/CHECKPOINT.md

@@ -0,0 +1,21 @@
+# CHECKPOINT — 세션 진행 상황
+
+> 작업 시작 시 이 파일을 가장 먼저 확인할 것.
+> 작업 종료 전 현재 상태로 업데이트할 것.
+
+---
+
+## 현재 상태
+
+- **마지막 업데이트**: (없음)
+- **진행 중인 작업**: 없음
+- **브랜치**: (없음)
+
+---
+
+<!-- 업데이트 포맷:
+## 현재 상태
+- **마지막 업데이트**: 2026-MM-DD
+- **진행 중인 작업**: 작업명 또는 없음
+- **브랜치**: feature/xxx or HEAD
+-->