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 aj-geddes/useful-ai-prompts --skill nosql-database-designgit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote 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/aj-geddes/useful-ai-prompts/nosql-database-design)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/nosql-database-design"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/nosql-database-design/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/aj-geddes/useful-ai-prompts/nosql-database-design"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/nosql-database-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk 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 | $0.00034 | $0.00547 |
| Opus 5 | $0.00017 | $0.00273 |
| Sonnet 5 | $0.00007 | $0.00109 |
| Haiku 4.5 | $0.00003 | $0.00055 |
Grade A, and why
nosql-database-design 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NoSQL Database Design
Table of Contents
Overview
Design scalable NoSQL schemas for MongoDB (document) and DynamoDB (key-value). Covers data modeling patterns, denormalization strategies, and query optimization for NoSQL systems.
When to Use
- MongoDB collection design
- DynamoDB table and index design
- Document structure modeling
- Embedding vs. referencing decisions
- Query pattern optimization
- NoSQL indexing strategies
- Data denormalization planning
Quick Start
Minimal working example:
// Single document with embedded arrays
db.createCollection("users");
db.users.insertOne({
_id: ObjectId("..."),
email: "[email protected]",
name: "John Doe",
createdAt: new Date(),
// Embedded address
address: {
street: "123 Main St",
city: "New York",
state: "NY",
zipCode: "10001",
},
// Embedded array of items
orders: [
{
orderId: ObjectId("..."),
date: new Date(),
total: 149.99,
},
{
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Document Structure Design | Document Structure Design |
| Indexing in MongoDB | Indexing in MongoDB |
| Schema Validation | Schema Validation |
| Table Structure | Table Structure |
| Global Secondary Indexes (GSI) | Global Secondary Indexes (GSI) |
| DynamoDB Item Operations | DynamoDB Item Operations |
Best Practices
✅ DO
- Follow established patterns and conventions
- Write clean, maintainable code
- Add appropriate documentation
- Test thoroughly before deploying
What ships with it
8 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.
- references/document-structure-design.md 1.4 KB
- references/dynamodb-item-operations.md 809 B
- references/global-secondary-indexes-gsi.md 888 B
- references/indexing-in-mongodb.md 668 B
- references/schema-validation.md 867 B
- references/table-structure.md 805 B
- scripts/validate-schema.sh 426 B runs code
- templates/migration-template.sql 302 B
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.
- 9d ago First seen · 93 lines · 34 tokens per session scan A 1f4c62040bbc
nosql-database-design is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 34 tokens to every session and 547 once invoked, about $0.0002 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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