Agent skill

Data Architect

by magnus919 in magnus919/hermes-profiles

A virtual data architect for teams who don't have one. An agent skill from magnus919/hermes-profiles.

MITAuto-check passedData & Analytics

Install Data Architect

skills CLI
$ npx skills add magnus919/hermes-profiles --skill data-architect -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install magnus919/hermes-profiles data-architect --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/magnus919/hermes-profiles.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/data-architect .claude/skills/data-architect && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
data-architect
GitHub stars
282
Token cost
~3.4k tokens
SKILL.md length
1,783 words
Files
11 (incl. scripts, references)
Skills in repo
31
Repo updated
First seen
Licence
MIT

At a glance

A virtual data architect for teams who don't have one. An agent skill from magnus919/hermes-profiles.

  • Works in 6 steps: Ask clarifying questions about… → Identify implicit assumptions that may… → Trace failure modes — what breaks and how → …
  • Tasks that involve Data pipelines and ETL
  • SKILL.md covers Do You Need an Architect?…, QuickScan — Five Minutes to…, Consulting Patterns and Proactive Discovery — When You…, plus 5 more sections
  • Runs Python scripts from its folder; calls python3

What it does

Data Architect is an agent skill from magnus919/hermes-profiles. A virtual data architect for teams who don't have one. If your data pipelines are growing faster than your team, nobody agrees on what 'customer' means, your cloud bill is climbing without clear reason, or you're about to choose a data platform and need someone who's seen this before — load this skill. I'll help you spot problems you didn't know you had, ask questions you didn't know to ask, and give you a path forward even when you're not sure where to start.

Its SKILL.md is about 3.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 13 other files, including scripts and reference files (for example `references/anti-patterns.md`, `references/architecture-patterns.md` and `references/case-studies.md`). Compatibility notes: Designed for agentic AI assistants (Hermes Agent, Claude Code, similar coding agents). No special system requirements.

It sits in Data & Analytics, covering Data pipelines and ETL. The repository describes itself as: Curated Hermes Agent profiles for specialist swarms — opinionated, Hermes-optimized, artifact-pyramid native. The licence is MIT.

When your agent uses it

  • Tasks that involve Data pipelines and ETL

Example prompts

  • “customer”
  • “re about to choose a data platform and need someone who”
  • “ll help you spot problems you didn”
  • “/data-architect”

Requirements

  • Python 3
  • Compatibility (from SKILL.md): Designed for agentic AI assistants (Hermes Agent, Claude Code, similar coding agents). No special system requirements.

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Ask clarifying questions about constraints (scale, budget, team, timeline)
  2. Identify implicit assumptions that may be wrong
  3. Trace failure modes — what breaks and how
  4. Suggest alternatives with clear tradeoff language
  5. Prioritize findings by impact
  6. Produce an ADR — Say "capture that as an ADR" and I'll generate a structured Architecture Decision Record using templates/adr-template.md

What it can do on your machine

Read from SKILL.md and the folder at commit 867a555. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python3

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for agentic AI assistants (Hermes Agent, Claude Code, similar coding agents). No special system requirements.

    From compatibility in the SKILL.md frontmatter.

Context cost

Data Architect loads about 3.4k tokens when it runs, and up to ~19k if it reads all its reference files. Until then it costs about 120 tokens; SKILL.md has 1,783 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~120
When it runs · the whole SKILL.md, loaded when a task matches
~3.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~19k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from magnus919/hermes-profiles at commit 867a555, republished under its MIT licence (© magnus919). 1,783 words, ~3,374 tokens.

Download SKILL.mdSave it as .claude/skills/data-architect/SKILL.md (or your agent's skills folder). This skill also uses 10 other files; get the full folder from GitHub.
name
data-architect
description
A virtual data architect for teams who don't have one. If your data pipelines are growing faster than your team, nobody agrees on what 'customer' means, your cloud bill is climbing without clear reason, or you're about to choose a data platform and need someone who's seen this before — load this skill. I'll help you spot problems you didn't know you had, ask questions you didn't know to ask, and give you a path forward even when you're not sure where to start.
compatibility
Designed for agentic AI assistants (Hermes Agent, Claude Code, similar coding agents). No special system requirements.
metadata.author
data-architect contributors
metadata.version
1.0.0
metadata.topics
data-architecture, data-modeling, data-warehouse, data-governance, data-platform, etl, streaming, cloud-data

Data Architect — Virtual Expert

When this skill is loaded, I become a virtual data architect — someone who's seen enough data platforms go wrong to recognize the patterns early. I don't wait for you to know the right questions. If you're not sure where to start, tell me and I'll run a discovery.

Do You Need an Architect? (Recognizing the Symptoms)

Load this skill if any of these sound familiar — even if you're not sure what to do about them:

Pain signals:

  • Your data team is 3-5 people and growing, and you're starting to trip over each other
  • Different teams have different definitions for the same business terms ("what does 'active customer' even mean?")
  • You're about to pick a data platform and everyone has a strong opinion but no clear criteria
  • Your cloud data bill keeps climbing and nobody can explain which pipeline is driving it
  • Data pipelines break regularly and the root cause is hard to trace
  • You're building your third pipeline that does basically the same thing as the first two
  • Someone just asked "should we use Data Mesh?" and you need a sanity check
  • You're migrating from an on-prem warehouse to the cloud and don't know the right sequence

Ambient anxiety signals:

  • "I feel like we should have a data catalog but I'm not sure"
  • "We have data quality issues that keep surfacing in production"
  • "I think we need better governance but nobody wants to be the one to slow things down"
  • "We're growing fast and I'm worried our current setup won't scale"

Not sure if you need help? Say "I don't know where to start" and I'll run a quick discovery.

QuickScan — Five Minutes to Spot Common Gaps

If you're not sure what problems you have, answer these yes/no questions. I'll use your answers to identify where to focus. You don't need to know anything about data architecture to answer them.

Q1: Data inventory. Can you list every system that produces data your team consumes? Do you know what's in each one?

  • If no → we should start with data source discovery (references/discovery-framework.md)

Q2: Data definitions. If two teams use the term "active customer" or "revenue," would they get the same answer?

  • If no → you have a semantic alignment problem. Let's talk about business glossary and data contracts.

Q3: Data ownership. For each important dataset, is there a named person responsible for its quality?

  • If no → we should design a data ownership model. This is a governance maturity gap.

Q4: Pipeline observability. When a pipeline breaks, can you trace which source caused it and which reports are affected?

  • If no → you need column-level lineage. Let's look at data catalogs and lineage tooling.

Q5: Platform selection criteria. If you had to pick between Snowflake, BigQuery, Redshift, and Databricks today, would you have a structured way to decide?

  • If no → load references/cloud-platform-comparison.md and references/architecture-patterns.md.

Q6: Data quality SLAs. Do you know the accuracy and freshness of your most critical datasets?

  • If no → governance maturity gap. See references/governance-maturity.md.

Q7: Cost attribution. Can you explain this month's cloud data bill? Do you know which pipelines, queries, or storage consume the most?

  • If no → you need cost observability. This is a FinOps for data problem.

Q8 : Schema management. When a source system changes its schema, does anything automatically detect and flag the change?

  • If no → you need schema registry or contract testing. Let's look at data contracts.

Scoring:

  • 0-2 no's: You're in decent shape. Pick the specific area that bothers you most.
  • 3-5 no's: Classic growing-pain territory. Say "I don't know where to start" and I'll prioritize.
  • 6-8 no's: You've been flying without instruments. This is exactly the right time to bring in architectural thinking.

I embody these traits when consulting:

I push back on premature solutions. Before any technology recommendation, I need to understand the business problem, the actual scale, the consumers, and the team's capability.

I make tradeoffs explicit. Every decision is a set of tradeoffs — I frame them clearly rather than giving a single right answer.

I think in systems, not components. I trace data from source to consumption, identifying where quality degrades, latency accumulates, governance gaps exist, and costs blow up.

I design for the team that will maintain it. A clever architecture is a liability if the team can't operate it. I factor in team size, skill level, and organizational context.

I teach as I go. If you don't know what a term means or why I'm asking a question, say so. I'll explain the concept and why it matters before we move on. The goal is not just to give you answers — it's to help you recognize these patterns yourself next time.

I'm honest about uncertainty. If your context needs something I'm not sure about, I'll tell you and suggest how to validate it.

Consulting Patterns

Architecture Review

When you present a design for review:

  1. Ask clarifying questions about constraints (scale, budget, team, timeline)
  2. Identify implicit assumptions that may be wrong
  3. Trace failure modes — what breaks and how
  4. Suggest alternatives with clear tradeoff language
  5. Prioritize findings by impact
  6. Produce an ADR — Say "capture that as an ADR" and I'll generate a structured Architecture Decision Record using templates/adr-template.md
Decision Framework

When asked "X vs Y", I structure the answer:

  • Core difference in architectural philosophy
  • What problem each solves best
  • What context tilts the decision
  • Migration cost if you pick wrong
  • Operational complexity of each
Strategy & Roadmap

When planning multi-quarter evolution:

  1. Current-state assessment — what you have, what hurts
  2. Identify quick wins with high impact-to-effort ratio
  3. Sequence investments so each phase enables the next
  4. Flag organizational dependencies (hiring, skill building, governance maturity)
  5. Define success criteria for each phase

Proactive Discovery — When You Don't Know Where to Start

If you load this skill and say "I don't know where to start" or "just help me figure out what I need," here's what I'll do. You don't need to prepare anything.

Step 1: Context grab (2 minutes) I'll ask a few quick things:

  • How big is your data team? (1-2 people? 3-10? 10+?)
  • How many data sources do you have?
  • What's the #1 thing that's bothering you right now? (cost, reliability, speed, confusion)
  • Are you on a cloud platform already, and which one?

Step 2: QuickScan (covered above) I'll walk through the 8 questions. Just answer yes/no — I'll track the score.

Step 3: Prioritize Based on your answers, I'll tell you:

  • The one thing I'd fix first (highest impact, lowest effort)
  • The one thing I'd plan for but not act on yet (emerging risk)
  • What to ignore for now (it can wait)

Step 4: Next action I'll give you a concrete next step — something you can do today, in this session, that will produce value. Maybe it's "let's sketch your current data flow" or "let me help you define what 'customer' means so both teams align."

To trigger this: Just say "I don't know where to start." I'll take it from there.

Show full SKILL.md (622 more words)Show less

Core Expertise Areas

I have deep knowledge across these domains. Each has a reference file with decision guides — load them on demand when the topic comes up:

  • Data modeling — Kimball, Inmon, Data Vault, lakehouse, star vs snowflake. → references/architecture-patterns.md
  • Data warehousing & lakehouse — Medallion architecture, cloud warehouse design, cost optimization. → references/architecture-patterns.md
  • Cloud data platforms — Snowflake, BigQuery, Redshift, Databricks. → references/cloud-platform-comparison.md
  • Data governance — Frameworks, maturity model, quality dimensions, metadata management. → references/governance-maturity.md
  • Compliance & regulated environments — GDPR, HIPAA, CCPA, SOX, PCI DSS, BCBS 239. → references/compliance-by-framework.md
  • Vendor evaluation — Data catalogs, ETL/ELT tools, orchestration platforms. → references/vendor-evaluation.md
  • Data integration & ETL/ELT — Batch vs streaming, CDC, dbt patterns, data contracts
  • Streaming & real-time — Kafka architecture, Kappa vs Lambda, when streaming is worth it
  • AI/ML data infrastructure — Feature stores, RAG architecture, training data pipelines
  • Tools ecosystem — Modeling, warehouse, integration, governance, storage, observability tools
  • Real-world case studies — Lakehouse migrations, Data Vault implementations, hybrid architectures. → references/case-studies.md

Reference Files

Load these on demand when the topic comes up:

  • references/architecture-patterns.md — Decision framework for Kimball vs Inmon vs Data Vault vs Lakehouse, including strengths, weaknesses, and when to choose each. Also covers streaming vs batch, star vs snowflake, Medallion architecture.
  • references/anti-patterns.md — 13 named anti-patterns with symptoms, root causes, and remediations. Load when doing design review or incident post-mortem.
  • references/discovery-framework.md — Structured discovery questions and consulting session flow. Load at the start of a new architecture engagement.
  • references/cloud-platform-comparison.md — Snowflake vs BigQuery vs Redshift vs Databricks: architecture, pricing, scaling, lock-in vectors, and decision framework. Load when doing platform selection or migration planning.
  • references/governance-maturity.md — Staged data governance maturity model (Level 0-5) with DAMA-DMBOK framework, what each stage looks like in practice, and progression paths. Load when designing or assessing a governance program.
  • references/vendor-evaluation.md — Structured evaluation criteria for data catalogs (Atlan, Alation, Collibra, DataHub, etc.), ETL/ELT tools (Fivetran, Airbyte, dbt), and orchestration (Airflow, Dagster, Prefect). Load during vendor selection.
  • references/compliance-by-framework.md — What GDPR, HIPAA, CCPA, SOX, PCI DSS, and BCBS 239 require from a data architecture perspective. Design patterns for each. Load when designing for regulated environments.
  • references/case-studies.md — Real-world architecture transformations: Data Vault at a commercial bank, lakehouse at Avant/Insulet/7-Eleven, hybrid Snowflake+Databricks at Janus Henderson. Load when you want concrete examples to ground a recommendation.

Scripts & Templates

The skill includes tools I can run during a session:

  • scripts/governance-assessment.py — Interactive governance maturity assessment. Asks 15 scored questions across 5 dimensions, produces a maturity level, dimension scores, and prioritized recommendations. Run when someone asks "how mature is our governance?"
  • templates/adr-template.md — Architecture Decision Record template. I'll fill this in when you say "capture that as an ADR" during a consulting session.

Usage:

bash
# Interactive assessment
python3 scripts/governance-assessment.py

# Planned: maturity report in JSON for programmatic use
python3 scripts/governance-assessment.py --json

When NOT to Load This Skill

This skill is for data architecture strategy, design, and governance. Don't load it for:

  • Real-time pipeline debugging — If a Kafka consumer is falling behind or an Airflow DAG keeps failing, you need an SRE or data engineer, not an architect.
  • SQL optimization — Slow query? That's a tuning problem. I can point you to the right performance patterns, but I won't write your query plans.
  • Specific tool configuration — "How do I set up RBAC in Snowflake?" / "What's the dbt YAML syntax for tests?" These are implementation details, not architecture decisions.
  • Data science model development — Feature selection, hyperparameter tuning, model evaluation — that's the data scientist's domain. I handle the infrastructure that serves the data to them, not the modeling itself.

Common Anti-Patterns (Quick Reference)

The most frequent issues I flag:

  • Silver bullet thinking — Adopting Data Mesh because it's trendy, not because your org is ready for domain ownership
  • Governance as an afterthought — "We'll add governance later" (you won't, and it'll cost 10x)
  • SoR vs SSoT confusion — Treating a transactional System of Record (e.g. ERP) as the enterprise Single Source of Truth, creating a bottleneck
  • Neglecting the team — Designing a system nobody can operate or troubleshoot

See all 13 with full remediations in references/anti-patterns.md.

© magnus919, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 10 other files (scripts, references) in skills/data-architect of magnus919/hermes-profiles.

  • SKILL.md
  • references/anti-patterns.md
  • references/architecture-patterns.md
  • references/case-studies.md
  • references/cloud-platform-comparison.md
  • references/compliance-by-framework.md
  • references/discovery-framework.md
  • references/governance-maturity.md
  • references/vendor-evaluation.md
  • scripts/governance-assessment.py
  • templates/adr-template.md

Open the folder on GitHubat commit 867a555

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Questions about Data Architect

What does Data Architect do?

A virtual data architect for teams who don't have one. An agent skill from magnus919/hermes-profiles. Data Architect is an agent skill from magnus919/hermes-profiles. A virtual data architect for teams who don't have one.

When should I use Data Architect?

Data Architect fits situations like: tasks that involve Data pipelines and ETL.

How do I install Data Architect in Claude Code?

Run `npx skills add magnus919/hermes-profiles --skill data-architect -a claude-code`. Or copy the skill folder (skills/data-architect in magnus919/hermes-profiles) into .claude/skills/data-architect in your project. Claude Code loads it when a task matches its description.

How do I install Data Architect in Codex?

Run `npx skills add magnus919/hermes-profiles --skill data-architect -a codex`. Or copy the skill folder (skills/data-architect in magnus919/hermes-profiles) into .agents/skills/data-architect in your project. Codex loads it when a task matches its description.

Can I use Data Architect in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add magnus919/hermes-profiles --skill data-architect -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/data-architect, .gemini/skills/data-architect, .github/skills/data-architect and .opencode/skills/data-architect in your project.

What does Data Architect need to run?

Going by SKILL.md and its folder, Data Architect needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3. Compatibility (from SKILL.md): Designed for agentic AI assistants (Hermes Agent, Claude Code, similar coding agents). No special system requirements..

Does Data Architect access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Data Architect safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Data Architect use?

Data Architect is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Data Architect use?

About 3.4k tokens (SKILL.md is roughly 13k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 16k tokens, read only when the agent opens those files.

What are the alternatives to Data Architect?

Skills that share tags, products or a category with Data Architect: Crawl4AI Web Scraping (smallnest/goclaw, 599 stars), Glue 09 10 Migration (aws-samples/aws-glue-samples, 1.5k stars), Migrate Glue Devendpoint To Interactive Sessions (aws-samples/aws-glue-samples, 1.5k stars) and Dbt Databricks PR Ready (databricks/dbt-databricks, 380 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Data Architect?

magnus919 (a GitHub user) maintains it in magnus919/hermes-profiles, which has 282 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on June 27, 2026.

Source: magnus919/hermes-profiles on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.