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Get Started Free →Process automate data cleaning, transformation, and validation for ML tasks. Use when requesting "preprocess data", "clean data", "ETL pipeline", or "data transformation". Trigger with relevant phrases based on skill purpose.
.claude/skills/dicklesworthstone-preprocessing-data-with-automated-pipelines/SKILL.md| Model | Eval pass | Runs |
|---|---|---|
| gemini-3.6-flash | 92% | 14 |
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-06 | ✗→✓ | ▲ Improved | -47% | 0% |
| case-01 | ✓→✗ | ▼ Worse | -87% | 0% |
| case-02 | ✓→✗ | ▼ Worse | -46% | 0% |
| case-03 | ✓→✗ | ▼ Worse | -71% | 0% |
| case-04 | ✓→✗ | ▼ Worse | -68% | 0% |
This skill provides automated assistance for data preprocessing pipeline tasks.
This skill enables Claude to construct and execute automated data preprocessing pipelines, ensuring data quality and readiness for machine learning. It streamlines the data preparation process by automating common tasks such as data cleaning, transformation, and validation.
This skill activates when you need to:
User request: "Preprocess the customer data from the CSV file to remove duplicates and handle missing values."
The skill will:
User request: "Create an ETL pipeline to transform the sensor data from the database into a format suitable for time series analysis."
The skill will:
This skill can be integrated with other Claude Code skills for data analysis, model training, and deployment. It provides a standardized way to prepare data for these tasks, ensuring consistency and reliability.
The skill produces structured output relevant to the task.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-07 | pass→pass | 15,429 | 27,084 | +76% | 1 | 1 | 0% | 1,827 | 3,293 | +80% | 0 | 0 | — |
case-01 | pass→fail | 37,039 | 14,742 | -60% | 1 | 1 | 0% | 7,248 | 921 | -87% | 0 | 0 | — |
case-02 | pass→fail | 14,403 | 15,248 | +6% | 1 | 1 | 0% | 1,829 | 982 | -46% | 0 | 0 | — |
case-03 | pass→fail | 20,983 | 14,664 | -30% | 1 | 1 | 0% | 3,447 | 998 | -71% | 0 | 0 | — |
case-04 | pass→fail | 18,134 | 14,231 | -22% | 1 | 1 | 0% | 2,593 | 830 | -68% | 0 | 0 | — |
case-05 | pass→pass | 15,497 | 10,268 | -34% | 1 | 1 | 0% | 1,897 | 1,550 | -18% | 0 | 0 | — |
case-06 | fail→pass | 17,511 | 16,860 | -4% | 1 | 1 | 0% | 2,504 | 1,330 | -47% | 0 | 0 | — |
case-08 | fail→fail | 13,922 | 15,801 | +13% | 1 | 1 | 0% | 1,828 | 905 | -50% | 0 | 0 | — |
case-09 | fail→fail | 20,189 | 13,835 | -31% | 1 | 1 | 0% | 3,286 | 847 | -74% | 0 | 0 | — |
case-10 | fail→fail | 21,040 | 13,644 | -35% | 1 | 1 | 0% | 3,334 | 843 | -75% | 0 | 0 | — |
case-11 | pass→pass | 27,276 | 28,319 | +4% | 1 | 1 | 0% | 4,637 | 5,633 | +21% | 0 | 0 | — |
case-12 | pass→pass | 17,574 | 32,273 | +84% | 1 | 1 | 0% | 2,512 | 4,345 | +73% | 0 | 0 | — |
case-13 | pass→fail | 18,504 | 14,366 | -22% | 1 | 1 | 0% | 2,753 | 924 | -66% | 0 | 0 | — |
case-14 | pass→fail | 19,146 | 13,434 | -30% | 1 | 1 | 0% | 3,266 | 909 | -72% | 0 | 0 | — |
case-15 | fail→fail | 18,336 | 15,918 | -13% | 1 | 1 | 0% | 2,681 | 843 | -69% | 0 | 0 | — |
case-16 | pass→fail | 17,251 | 19,193 | +11% | 1 | 1 | 0% | 2,374 | 943 | -60% | 0 | 0 | — |
case-17 | pass→fail | 13,052 | 16,670 | +28% | 1 | 1 | 0% | 1,605 | 819 | -49% | 0 | 0 | — |
case-18 | pass→fail | 18,062 | 16,061 | -11% | 1 | 1 | 0% | 2,707 | 920 | -66% | 0 | 0 | — |
case-19 | pass→fail | 25,402 | 15,644 | -38% | 1 | 1 | 0% | 4,312 | 879 | -80% | 0 | 0 | — |
case-20 | pass→fail | 15,206 | 13,957 | -8% | 1 | 1 | 0% | 1,964 | 857 | -56% | 0 | 0 | — |
case-21 | pass→pass | 19,266 | 79,380 | +312% | 1 | 1 | 0% | 3,152 | 4,981 | +58% | 0 | 0 | — |
case-22 | pass→fail | 13,448 | 17,003 | +26% | 1 | 1 | 0% | 1,534 | 863 | -44% | 0 | 0 | — |
case-23 | pass→fail | 17,335 | 15,020 | -13% | 1 | 1 | 0% | 2,503 | 899 | -64% | 0 | 0 | — |
case-24 | pass→fail | 16,193 | 14,497 | -10% | 1 | 1 | 0% | 2,222 | 913 | -59% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 24 cases were attempted, and 6 counted toward the lift figure. The other 18 produced results that are not comparable between the two arms, so they are excluded from the headline rather than averaged into it. The headline lift of -54 percentage points is the difference between those two pass rates over the 6 comparable cases. 17 cases got worse with the skill loaded, and they are included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.