Set up AI dev environment for recordingtest (#2)

- CLAUDE.md with collaboration rules and Planner/Generator/Evaluator cycle
- .claude/ agents, commands, skills, hooks per Claude Code conventions
- Sprint Contracts for sut-prober, normalizer, recorder, player, diff-reporter
- SUT catalog (EG-BIM Modeler, 187 plugins) and .gitignore excluding SUT tree
- PROGRESS.md / PLAN.md as shared agent handoff state
- Solution scaffold targeting sut-prober PoC

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/hooks/stop-handoff-reminder.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Stop hook: remind the agent to run /handoff if PROGRESS.md / PLAN.md / today's
+# history file look stale. Informational only — never blocks.
+set -e
+
+today=$(date +%Y-%m-%d)
+msg=""
+
+if [ ! -f PROGRESS.md ]; then msg="${msg}\n- PROGRESS.md missing"; fi
+if [ ! -f PLAN.md ];     then msg="${msg}\n- PLAN.md missing"; fi
+if ! ls "docs/history/${today}_"*.md >/dev/null 2>&1; then
+  msg="${msg}\n- 오늘 날짜의 history 파일이 없습니다 (${today})"
+fi
+
+if [ -n "$msg" ]; then
+  jq -n --arg m "작업 종료 전 확인:${msg}\n→ /handoff 실행 권장" '{
+    hookSpecificOutput: {
+      hookEventName: "Stop",
+      additionalContext: $m
+    }
+  }'
+fi