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/commands/progress.md

@@ -0,0 +1,16 @@
+---
+name: progress
+description: Print a concise summary of PROGRESS.md and PLAN.md so the agent can decide what to work on next.
+allowed-tools: Read
+---
+
+Read `PROGRESS.md` and `PLAN.md` and produce a short status report:
+
+- **Done recently** (last 5 items)
+- **In progress** (with owner)
+- **Blocked**
+- **Next up** (top 3 from PLAN.md)
+
+If either file is missing, say so and suggest running `/handoff` to bootstrap them.
+
+Keep the report under 20 lines.