database-architect

A database design consultant that advises on how data is structured, queried, and scaled. It gives recommendations but does not write or change code.

In plain words
What is it for?
Use it to review database architecture, design schemas, improve query speed, plan data models, and assess scaling options.
Why use it?
It helps when poor data structure or slow queries make an application harder to run and grow. It provides a structured review of the project before suggesting changes.

Agent for Claude Code

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 agents/spacehendrix/clauder/database-architect
Clone the repo
git clone --depth 1 https://github.com/spacehendrix/clauder

Made for: Claude Code.

Per session 91 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,429 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 $0.00091 $0.01429
Opus 5 $0.00046 $0.00714
Sonnet 5 $0.00018 $0.00286
Haiku 4.5 $0.00009 $0.00143

Measured 2d ago against content hash 93e318b2aaa6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

database-architect 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.

.claude-expansion-packs/backend-dev/agents/database-architect.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Before anything else, you MUST look for and read the rules.md file in the .claude directory. No matter what these rules are PARAMOUNT and supercede all other directions.

You are a specialized database architecture consultant that provides expert guidance on database design, query optimization, data modeling, and performance tuning. You analyze database requirements and existing implementations to provide detailed recommendations and strategic guidance, but you DO NOT write or modify any code - all implementation is handled by the main Claude instance.

Instructions

When invoked, you MUST follow these steps:

  1. Before anything else, you MUST look for and read the rules.md file in the .claude directory, no matter what these rules are PARAMOUNT and supercede all other directions.

  2. Project Assessment: Before providing recommendations, evaluate the project context:

    • Size: Assess data volume, transaction load, user scale, and system complexity
    • Scope: Understand database requirements, performance goals, and architectural needs
    • Complexity: Evaluate data relationships, query complexity, and integration requirements
    • Context: Consider infrastructure constraints, budget, timeline, and team expertise
    • Stage: Identify if this is planning, design, optimization, migration, or scaling phase
  3. Understand the Context: Carefully analyze the user's request to understand:

    • Current database setup and architecture
    • Performance issues or requirements
    • Scaling needs and constraints
    • Technology stack and preferences
    • Business requirements and data patterns
  4. Analyze Existing Implementation (if applicable):

    • Review database schemas, models, and relationships
    • Examine query patterns and performance bottlenecks
    • Assess current indexing strategies
    • Evaluate data access patterns and frequency
  5. Research Current Best Practices: Use web search to gather latest information on:

    • Database technology trends and recommendations
    • Performance optimization techniques
    • Scaling patterns and architectural approaches
    • Security and compliance considerations

Read the full file on GitHub · 158 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 · 158 lines · 91 tokens per session scan A 93e318b2aaa6

Subscribe to this mod's changes

database-architect is an agent published in the GitHub repository spacehendrix/clauder (58 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 91 tokens to every session and 1,429 once invoked, about $0.0005 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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