# Small Data Power Planner

> Help teams decide what can be learned responsibly from small, imbalanced, expensive, or scarce datasets. Use when an agent needs a judgment-heavy data science workflow for avoid overfitting scarce data, including evidence review, local artifact inspection, risk classification, stakeholder-ready decisions, reproducibility, governance, or agent-to-agent handoff. Trigger for Codex, Claude, Gemini, Copilot, Cursor, Windsurf, Gravity, LangGraph, CrewAI, AutoGen, or local agents when this exact workflow is needed.

- Skill: `emily2040/small-data-power-planner` (Agent Skill, multi-file: 26 files)
- Install (CLI): `npx skillmds@latest add emily2040/small-data-power-planner`
- Raw SKILL.md: https://api.skillmd.com/api/skills/emily2040/small-data-power-planner/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Product & Planning
- Author: emily2040 (https://skillmd.com/u/emily2040)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/emily2040/small-data-power-planner

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# Small Data Power Planner

## Mission

Help teams decide what can be learned responsibly from small, imbalanced, expensive, or scarce datasets.

Current pain point: Small datasets are forced through high-capacity methods, producing unstable conclusions and overconfident narratives.

Why this skill exists: Power, uncertainty, resampling, priors, and simpler baselines must be planned before modeling scarce data.

## Operating Rules

- Start by restating the decision this skill is supporting.
- Inspect local artifacts first before asking for context.
- Treat scripts as evidence collectors, not as substitutes for judgment.
- Preserve raw data, notebooks, configs, and model artifacts unless the user explicitly asks for mutation.
- Mark missing context as `unknown`, `not provided`, or `owner decision`; do not invent it.
- Classify each blocker as `stop`, `fix-first`, `monitor`, `accepted risk`, or `owner decision`.
- Use the output contract exactly unless the user asks for a different format.
- Keep final recommendations auditable: every important claim needs evidence, assumption, or caveat.

## What This Skill Must Do

- Transform a vague request into an explicit Small Data Power Planner decision with named owner, evidence, assumptions, and action threshold.
- Inspect local artifacts first: data extracts, schemas, notebooks, SQL, pipeline configs, model reports, tickets, and prior decisions.
- Separate mechanical checks from expert judgment so another reviewer can reproduce what was checked and what was inferred.
- Classify findings as stop, fix-first, monitor, accepted risk, or owner decision instead of producing generic advice.
- Preserve raw evidence and never silently mutate data, notebooks, model artifacts, or production configs.
- Return a decision artifact that can be handed to a data scientist, ML engineer, governance reviewer, or stakeholder without hidden context.

## Required Inputs

- sample size
- outcome rate
- candidate features
- effect size of interest
- cost of errors
- collection options

If an input is missing, inspect available files first. Ask only for information that cannot be recovered from the workspace and would change the recommendation.

## Workflow

1. Identify the decision and minimum useful effect size.
2. Estimate signal limits, imbalance, uncertainty, and variance risks.
3. Recommend descriptive, Bayesian, resampling, regularized, or data-collection paths.
4. Define validation limits and language for uncertainty.
5. Return a do-model, simplify, or collect-more recommendation.

## Red Flags

- more features than observations
- rare outcome with random split
- single holdout set only
- unreported uncertainty
- high-stakes decision from tiny sample

When a red flag appears, slow down and surface it in `Risks`. A red flag does not always mean stop, but it must change the recommendation or the confidence level.

## Resources

- Read `references/playbook.md` for the skill-specific checklist, scoring rubric, and failure modes.
- Read `references/acceptance-tests.md` before forward-testing clean, messy, and adversarial requests.
- Read `references/agent-portability.md` when adapting this skill to Claude, Gemini, Copilot, Cursor, Windsurf, Gravity, LangGraph, CrewAI, AutoGen, or local agents.
- Read `references/quality-rubric.md` when reviewing whether the output meets senior data-science standards.
- Use `scripts/quick_validate_skill.py . --strict` before publishing or installing the skill.

Use only the specific reference file needed for the task; keep context small.

## Output Contract

Return these sections unless the user requests another format:

- `Problem`: the decision, artifact, model, data source, or workflow being handled.
- `Inputs`: files, data, stakeholder context, assumptions, and missing context used.
- `Checks performed`: concrete inspections, scripts, and reasoning checks.
- `Findings`: prioritized observations with evidence.
- `Decision`: go, fix-first, stop, proceed-with-risk, or needs-owner-review.
- `Risks`: unresolved blockers, caveats, and owner decisions.
- `Next actions`: smallest useful follow-up steps.
- `Artifacts`: generated files, specs, reports, scripts, or links.

## Final Checks

- Did the response answer the actual decision, not just analyze data?
- Did it preserve evidence and avoid silent mutation?
- Did it name unknowns and owner decisions?
- Did it include at least one concrete next action?
- Did it avoid overclaiming causality, readiness, compliance, or production safety?