- Add experiments/dsv4_h200_sglang (config, server start, orchestrator, parser, README) - Fix start_server.sh to wait for HTTP 200 via curl --fail instead of treating 503 as ready - Add H200 SGLang baseline to root README and update .gitignore for per-run raw_outputs/logs - Remove stale experiments/dsv4_h200_dspark/DSPARK_FIX_PR_PREP.md