explore-data

A dataset-profiling workflow for examining a table or data file before analysis. It checks the data's size, structure, types, missing values, duplicates, and distributions.

In plain words
What is it for?
Use it to inspect CSV, Excel, Parquet, or JSON files, or to profile a connected data-warehouse table and decide which measurements and categories to analyze.
Why use it?
It helps reveal data-quality problems and basic patterns before you draw conclusions from unfamiliar data.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/anthropics/knowledge-work-plugins/explore-data
Any agent
npx skills add anthropics/knowledge-work-plugins --skill explore-data
Clone the repo
git clone --depth 1 https://github.com/anthropics/knowledge-work-plugins

Made for: Claude Code, Codex.

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,678 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00054 $0.02678
Opus 5 $0.00027 $0.01339
Sonnet 5 $0.00011 $0.00536
Haiku 4.5 $0.00005 $0.00268

Measured 2d ago against content hash af7590fa6163, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explore-data scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

data/skills/explore-data/SKILL.md · 326 lines

How it starts

The opening of the file, as written. The whole thing — 326 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/explore-data - Profile and Explore a Dataset

If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md.

Generate a comprehensive data profile for a table or uploaded file. Understand its shape, quality, and patterns before diving into analysis.

Usage

/explore-data <table_name or file>

Workflow

1. Access the Data

If a data warehouse MCP server is connected:

  1. Resolve the table name (handle schema prefixes, suggest matches if ambiguous)
  2. Query table metadata: column names, types, descriptions if available
  3. Run profiling queries against the live data

If a file is provided (CSV, Excel, Parquet, JSON):

  1. Read the file and load into a working dataset
  2. Infer column types from the data

If neither:

  1. Ask the user to provide a table name (with their warehouse connected) or upload a file
  2. If they describe a table schema, provide guidance on what profiling queries to run

2. Understand Structure

Before analyzing any data, understand its structure:

Table-level questions:

  • How many rows and columns?
  • What is the grain (one row per what)?
  • What is the primary key? Is it unique?
  • When was the data last updated?
  • How far back does the data go?

Column classification — categorize each column as one of:

  • Identifier: Unique keys, foreign keys, entity IDs
  • Dimension: Categorical attributes for grouping/filtering (status, type, region, category)
  • Metric: Quantitative values for measurement (revenue, count, duration, score)
  • Temporal: Dates and timestamps (created_at, updated_at, event_date)
  • Text: Free-form text fields (description, notes, name)
  • Boolean: True/false flags
  • Structural: JSON, arrays, nested structures

3. Generate Data Profile

Run the following profiling checks:

Table-level metrics:

  • Total row count
  • Column count and types breakdown
  • Approximate table size (if available from metadata)
  • Date range coverage (min/max of date columns)

Read the full file on GitHub · 326 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 326 lines · 54 tokens per session scan A af7590fa6163

Subscribe to this mod's changes

explore-data is a skill published in the GitHub repository anthropics/knowledge-work-plugins (23,791 stars, last pushed today), licensed Apache-2.0. It adds 54 tokens to every session and 2,678 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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