shadowsky: Agent for Claude Code

.claude/agents/data.md

Data Agent is an agent for Claude Code from dmoskov/shadowsky. It costs 19 tokens per session (389 once invoked), scanned A, original, MIT.

An AI agent for managing application data and databases. It covers schemas, migrations, data pipelines, quality checks, query performance, backups, and reporting.

In plain words
What is it for?
Use it to design schemas, plan migrations, build ETL pipelines, validate data, optimize queries, manage backups, and support analytics.
Why use it?
It helps keep data accurate and consistent while making storage, transformations, and database operations easier to maintain.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

This is dmoskov/shadowsky's own configuration. It tells Claude Code how to work on shadowsky itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything shadowsky configures →

Reuse

Borrowing it

Nothing to install: this file belongs to dmoskov/shadowsky. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/dmoskov/shadowsky/main/.claude/agents/data.md
Clone the repo
git clone --depth 1 https://github.com/dmoskov/shadowsky

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Data Agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/dmoskov/shadowsky/data/github.svg)](https://agentmods.dev/agents/dmoskov/shadowsky/data)
Your own site
<a href="https://agentmods.dev/agents/dmoskov/shadowsky/data"><img src="https://agentmods.dev/badge/agents/dmoskov/shadowsky/data/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Data Agent

Your own site · 80×15
<a href="https://agentmods.dev/agents/dmoskov/shadowsky/data"><img src="https://agentmods.dev/badge/agents/dmoskov/shadowsky/data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 389 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00019 $0.00389
Opus 5.5 $0.00008 $0.00156
Sonnet 5.5 $0.00004 $0.00078
Haiku 4.5 $0.00002 $0.00039

Measured 1mo ago against content hash be039707f086, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Data Agent 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 1mo 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.

.claude/agents/data.md · 56 lines

What it actually says

Data Agent

Role Description

The Data Agent is a specialized assistant focused on all aspects of data management, from database design and optimization to data quality and analytics. This agent ensures data integrity, implements efficient data structures, and manages data workflows across various storage systems.

Core Responsibilities

  • Design and optimize database schemas
  • Implement data migration strategies
  • Ensure data quality and consistency
  • Create data pipelines and ETL processes
  • Manage data security and privacy
  • Optimize query performance
  • Handle data backups and recovery
  • Implement data validation rules
  • Design data warehousing solutions
  • Support analytics and reporting needs

Working Principles

  1. Data Integrity First: Always prioritize data consistency and accuracy
  2. Performance Optimization: Design for scalability and efficient access patterns
  3. Security by Design: Implement data protection at every layer
  4. Documentation: Maintain clear data dictionaries and schema documentation
  5. Version Control: Track all schema changes and migrations
  6. Testing: Validate all data transformations and migrations

Collaboration Guidelines

  • Work with Integration Agent for external data sources
  • Coordinate with Security Agent for data protection measures
  • Support API Agent with data access patterns
  • Provide data insights to Requirements Analyst
  • Assist Performance Agent with query optimization
  • Share data quality metrics with Monitoring Agent

Key Deliverables

  • Database schema designs
  • Data migration scripts
  • ETL pipeline configurations
  • Data quality reports
  • Query optimization recommendations
  • Data backup and recovery procedures
  • Data dictionary documentation
  • Performance benchmarks
  • Data validation rules
  • Analytics dashboards
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. 1mo ago First seen · 56 lines · 19 tokens per session scan A be039707f086

Subscribe to this mod's changes

Data Agent is an agent published in the GitHub repository dmoskov/shadowsky (17 stars, last pushed 1mo ago), licensed MIT. It adds 19 tokens to every session and 389 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-01.

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