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.
npx skills add OneWave-AI/claude-skills --skill database-schema-designergit clone --depth 1 https://github.com/OneWave-AI/claude-skillsWrote 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.
[](https://agentmods.dev/skills/onewave-ai/claude-skills/database-schema-designer)<a href="https://agentmods.dev/skills/onewave-ai/claude-skills/database-schema-designer"><img src="https://agentmods.dev/badge/skills/onewave-ai/claude-skills/database-schema-designer/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.
<a href="https://agentmods.dev/skills/onewave-ai/claude-skills/database-schema-designer"><img src="https://agentmods.dev/badge/skills/onewave-ai/claude-skills/database-schema-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.00417 |
| Opus 5 | $0.00027 | $0.00209 |
| Sonnet 5 | $0.00011 | $0.00083 |
| Haiku 4.5 | $0.00005 | $0.00042 |
Grade A, and why
database-schema-designer 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 7d 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.
What it actually says
Database Schema Designer
Design optimized, scalable database schemas with proper relationships and indexes.
Contents
references/schema-templates.md— SQL/NoSQL schema templates, ASCII ERD, and migration script templates.references/output-format.md— labeled section structure for the final deliverable.references/best-practices.md— naming, data types, indexes, relationships, SQL/NoSQL design rules, and the output quality checklist.
Workflow
-
Gather requirements. Determine the database engine (PostgreSQL, MySQL, MongoDB, etc.), application domain, main entities, most common queries, expected data volume and growth, performance requirements, and any compliance constraints.
-
Design the schema. Apply the engine-appropriate rules in
references/best-practices.md(SQL Database Design or NoSQL Database Design). -
Generate the complete schema. Produce CREATE TABLE statements or collection documents using the templates in
references/schema-templates.md. -
Create the entity relationship diagram in text format following the ERD template in
references/schema-templates.md. -
Provide migration scripts with both up and down (rollback) paths, per the migration template in
references/schema-templates.md. -
Format the complete output using the labeled sections in
references/output-format.md. -
Verify the result against the output quality checklist in
references/best-practices.md.
Example Triggers
- "Design a database schema for an e-commerce platform"
- "Create SQL tables for a blog system"
- "Help me design a MongoDB schema for a social network"
- "Optimize this database schema for performance"
- "Generate migration scripts for my schema"
Generate production-ready, optimized database schemas that scale.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 7d ago First seen · 41 lines · 54 tokens per session scan A a1ca262a1283
database-schema-designer is a skill published in the GitHub repository OneWave-AI/claude-skills (288 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 417 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 2026-09-03.
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