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 joneqian/claude-skills-suite --skill backend-patternsgit clone --depth 1 https://github.com/joneqian/claude-skills-suiteWrote 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/joneqian/claude-skills-suite/backend-patterns)<a href="https://agentmods.dev/skills/joneqian/claude-skills-suite/backend-patterns"><img src="https://agentmods.dev/badge/skills/joneqian/claude-skills-suite/backend-patterns/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/joneqian/claude-skills-suite/backend-patterns"><img src="https://agentmods.dev/badge/skills/joneqian/claude-skills-suite/backend-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00037 | $0.03962 |
| Opus 5.5 | $0.00015 | $0.01585 |
| Sonnet 5.5 | $0.00007 | $0.00792 |
| Haiku 4.5 | $0.00004 | $0.00396 |
Grade A, and why
backend-patterns scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const requests = this.requests.get(identifier) || []; How it starts
The opening of the file, as written. The whole thing — 686 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Backend Development Patterns
Backend architecture patterns and best practices for scalable server-side applications.
Framework-Specific Guidelines
When working with specific frameworks, combine this skill with framework-specific skills:
| Framework | Additional Skill | When to Use |
|---|---|---|
| NestJS | nestjs-best-practices skill |
Modules, Controllers, Providers, Guards, Interceptors, Pipes, DI |
| FastAPI | fastapi-templates skill |
Routes, Decorators, DI, GraphQL, Microservices |
| Next.js API | This skill only | Serverless API routes |
NestJS Integration
When using NestJS, the patterns in this skill should be adapted to NestJS conventions:
| Generic Pattern | NestJS Implementation |
|---|---|
| Repository Pattern | Use @Injectable() repositories with DI |
| Service Layer | Use @Injectable() services |
| Middleware | Use NestJS @Injectable() middleware or Guards/Interceptors |
| Error Handling | Use Exception Filters (@Catch()) |
| Validation | Use Pipes with class-validator |
| Auth Middleware | Use Guards (@UseGuards()) |
| Rate Limiting | Use @nestjs/throttler module |
Example - NestJS Repository Pattern:
// NestJS style with dependency injection
@Injectable()
export class MarketRepository {
constructor(
@InjectRepository(Market)
private marketRepo: Repository<Market>,
) {}
async findAll(filters?: MarketFilters): Promise<Market[]> {
const query = this.marketRepo.createQueryBuilder('market');
if (filters?.status) {
query.where('market.status = :status', { status: filters.status });
}
return query.getMany();
}
}
// Inject into service
@Injectable()
export class MarketService {
constructor(private marketRepo: MarketRepository) {}
}
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.
- 1mo ago First seen · 686 lines · 37 tokens per session scan A dd757dfa8d7c
backend-patterns is a skill published in the GitHub repository joneqian/claude-skills-suite (32 stars, last pushed 8mo ago), licensed MIT. It adds 37 tokens to every session and 3,962 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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