[user] give a prompt so that I can reproduce same experiment run as https://tradeac-dev.h.lizhao.net/rd/input?expId=16&run=0cea66d9892246519bdf329a0410a277, i.e., the prompt should give the skills/input/data/feature/model/hyperparameters etc

[assistant] Let me load the relevant skills and look up the experiment details.

[assistant] Now let me fetch the experiment details.

[assistant] Now let me also grab the metrics:

[assistant] Here is the prompt to reproduce experiment 16 / run `0cea66d9892246519bdf329a0410a277`:

---

**Reproduce experiment 16 — RankICEnsembleLGBModel (5-seed RankIC early-stop ensemble)**

Run the following workflow via `rd_run_workflow` into a new experiment. First ensure the lake has 1d bars + stochastic-process features for the 50-ETF universe back to 2015-01-03, then create and run this YAML:

```yaml
{%- set LAKE = TAC_LAKE_DIR %}

qlib_init:
    provider_uri: "{{ LAKE }}"
    region: us
    expression_cache: null
    dataset_cache: null
    calendar_provider:
        class: tac_qlib.data.providers.LakeCalendarProvider
        kwargs: { lake_root: "{{ LAKE }}", market: US }
    instrument_provider:
        class: tac_qlib.data.providers.LakeInstrumentProvider
        kwargs: { lake_root: "{{ LAKE }}", market: US, markets: {} }
    feature_provider:
        class: tac_qlib.data.providers.LakeFeatureProvider
        kwargs: { lake_root: "{{ LAKE }}", market: US }
    exp_manager:
        class: MLflowExpManager
        module_path: qlib.workflow.expm
        kwargs: { uri: "sqlite:///mlruns.db", default_exp_name: "tac-rd-rank-ensemble-repro" }

task:
    model:
        class: RankICEnsembleLGBModel
        module_path: tac_qlib.contrib.model.rank_ensemble
        kwargs:
            loss: mse
            learning_rate: 0.02
            num_leaves: 31
            n_estimators: 3000
            num_boost_round: 3000
            early_stopping_rounds: 200
            min_data_in_leaf: 20
            lambda_l2: 0.5
            colsample_bytree: 0.8
            subsample: 0.8
            subsample_freq: 1
            reg_alpha: 0.1
            reg_lambda: 1.0
            seeds: "42,7,2026,99,123"

    dataset:
        class: DatasetH
        module_path: qlib.data.dataset
        kwargs:
            handler:
                class: TACHandler
                module_path: tac_qlib.contrib.data.handler
                kwargs:
                    instruments: "SPY,QQQ,DIA,IWM,MDY,VTI,VOO,VEA,VWO,VT,EFA,EEM,TLT,IEF,SHY,AGG,BND,LQD,HYG,JNK,EMB,GLD,SLV,USO,UNG,DBA,DBC,XLK,XLF,XLE,XLV,XLI,XLY,XLP,XLU,XLB,XLRE,ARKK,SMH,SOXX,IBB,XBI,ITA,XAR,ICLN,TAN,FDN,IGV,ESPO,REM"
                    start_time: "2015-01-03"
                    end_time: "2026-08-14"
                    fit_start_time: "2016-01-04"
                    fit_end_time: "2025-09-01"
                    freq: day
                    lake_root: "{{ LAKE }}"
                    market: US
                    label: "Ref($close,-6)/Ref($close,-1)-1"
                    feature_fields: "$open,$high,$low,$close,$vwap,$volume,sp_ret,sp_jump_ratio,sp_jump_flag,sp_jump_tail,sp_max_move,sp_rv1,sp_rv5,sp_rv22,sp_vol_ratio_5_22,sp_vol_ratio_1_22,sp_trend_slope_5,sp_trend_slope_20,sp_trend_slope_60,sp_logp,sp_hurst_exponent,sp_sig_level1_lead,sp_sig_level1_lag,sp_sig_level2_lead_lag,sp_sig_level2_lag_lead"
                    infer_processors:
                        - { class: DropAllNaN, kwargs: { fit_start_time: "2016-01-04", fit_end_time: "2025-09-01" } }
                        - { class: ProcessInf, kwargs: {} }
                        - { class: CSRankNorm, kwargs: {} }
                        - { class: ZScoreNorm, kwargs: { fit_start_time: "2016-01-04", fit_end_time: "2025-09-01" } }
                        - { class: Fillna, kwargs: {} }
            segments:
                train: ["2016-01-04", "2025-09-01"]
                valid: ["2025-09-03", "2026-01-03"]
                test:  ["2026-01-04", "2026-08-10"]

    record:
        - { class: SignalRecord, module_path: qlib.workflow.record_temp, kwargs: {} }
        - { class: SigAnaRecord, module_path: qlib.workflow.record_temp, kwargs: { ana_long_short: true, ann_scaler: 252 } }
        - class: PortAnaRecord
          module_path: qlib.workflow.record_temp
          kwargs:
              config:
                  strategy:
                      class: TopkDropoutStrategy
                      module_path: qlib.contrib.strategy
                      kwargs: { signal: "<PRED>", topk: 10, n_drop: 2, only_tradable: true, risk_degree: 0.95 }
                  backtest:
                      start_time: "2026-01-04"
                      end_time: "2026-08-10"
                      account: 1000000
                      benchmark: SPY
                      exchange_kwargs:
                          codes: "SPY,QQQ,DIA,IWM,MDY,VTI,VOO,VEA,VWO,VT,EFA,EEM,TLT,IEF,SHY,AGG,BND,LQD,HYG,JNK,EMB,GLD,SLV,USO,UNG,DBA,DBC,XLK,XLF,XLE,XLV,XLI,XLY,XLP,XLU,XLB,XLRE,ARKK,SMH,SOXX,IBB,XBI,ITA,XAR,ICLN,TAN,FDN,IGV,ESPO,REM"
                          deal_price: $close
                          freq: day
                          open_cost: 0.0005
                          close_cost: 0.0015
                          min_cost: 5.0
              risk_analysis_freq: 1d
```

**Prerequisites (lake data backfill):**
```
# 1. Backfill calendar
backfill_lake_calendar symbols=SPY start=2015-01-03 end=2026-08-14

# 2. Backfill 1d bars for the full universe
get_lake_bars symbols="SPY,QQQ,DIA,IWM,MDY,VTI,VOO,VEA,VWO,VT,EFA,EEM,TLT,IEF,SHY,AGG,BND,LQD,HYG,JNK,EMB,GLD,SLV,USO,UNG,DBA,DBC,XLK,XLF,XLE,XLV,XLI,XLY,XLP,XLU,XLB,XLRE,ARKK,SMH,SOXX,IBB,XBI,ITA,XAR,ICLN,TAN,FDN,IGV,ESPO,REM" timeframe=1d start=2015-01-03 end=2026-08-14 lazy=true

# 3. Compute & persist stochastic-process features (one symbol at a time or batch)
get_lake_sp symbol=<each> timeframe=1d start=2015-01-03 end=2026-08-14 fit_end=2025-09-01 families="ou,jump,har,trend,hurst,signature,moments"
```

**Run:**
```
rd_run_workflow config_path=<path-to-yaml> experiment_name=tac-rd-rank-ensemble-repro
```

**Key design choices being reproduced:**
- **Model**: `RankICEnsembleLGBModel` — 5 seeds (`42,7,2026,99,123`), each training a `RankICLGBModel` (per-day RankIC feval, `metric='None'` + `first_metric_only`), predictions averaged across seeds
- **Label**: 5-day forward return (`Ref($close,-6)/Ref($close,-1)-1`)
- **Features**: 26 bar + stochastic-process features (jump intensity, HARRV vol, trend slopes, Hurst exponent, path signatures) — no ta-lib indicators
- **Universe**: 50 ETFs (equity factor + bond + commodity + thematic)
- **Train window**: 2016-01-04 → 2025-09-01 (~9.7y), valid 2025-09-03 → 2026-01-03 (~4mo), test 2026-01-04 → 2026-08-10 (~7mo)
- **Processors**: DropAllNaN → ProcessInf → CSRankNorm → ZScoreNorm → Fillna
- **Strategy**: TopkDropout topk=10, n_drop=2, risk_degree=0.95, benchmark=SPY, costs 5/15bps