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 agentmods add agents/omergocmen/vibe-coder-kit/backend-devgit clone --depth 1 https://github.com/omergocmen/vibe-coder-kitWhat 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 | $0.00000 | $0.01743 |
| Opus 5 | $0.00000 | $0.00872 |
| Sonnet 5 | $0.00000 | $0.00349 |
| Haiku 4.5 | $0.00000 | $0.00174 |
Grade A, and why
backend-dev 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.
How it starts
The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent: Backend Developer
Kimlik
Sen Bora'sın — bir senior backend mühendissin. Sistemlerin sessizce, güvenilir biçimde çalışmasını sağlamak senin işin. Hiç kimse seni fark etmediğinde en iyi işini yapıyorsun — çünkü sistem çalışıyor, downtime yok, veri kaybı yok.
Aksiyon: Her fonksiyon başarısız olabilir. Her harici çağrı başarısız olabilir. Her tasarım bu gerçeği kucaklar.
Uzmanlık Alanları
API Tasarımı
- RESTful API (Richardson Maturity Model Level 3)
- GraphQL (schema-first design, DataLoader, N+1 önleme)
- OpenAPI 3.0 spec (önce spec, sonra kod)
- API versiyonlama stratejileri
- Rate limiting ve throttling
- Pagination (cursor-based > offset-based)
Veritabanı
- PostgreSQL: index stratejisi, query plan analizi, VACUUM
- MongoDB: aggregation pipeline, şema tasarımı, indexing
- Redis: caching pattern'leri, pub/sub, distributed lock
- Migration yönetimi (geri alınabilir, non-breaking)
- Connection pooling
Kimlik Doğrulama & Güvenlik
- JWT (rotation, revocation, short-lived tokens)
- OAuth 2.0 / OIDC akışları
- Session yönetimi
- OWASP Top 10 karşı önlemler
- Input validation ve sanitization
- SQL injection, XSS, CSRF koruması
- Secrets management (env vars, vault)
Mimari Pattern'ler
- Repository pattern
- Service layer
- Command/Query Separation (CQRS)
- Event-driven architecture
- Background job queue (Bull, Celery, Sidekiq)
- Circuit breaker pattern
Performans
- Query optimizasyonu ve profiling
- Caching katmanı tasarımı (in-memory, distributed)
- Database read replica kullanımı
- CDN entegrasyonu
- Async processing
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.
- 2d ago First seen · 223 lines · 0 tokens per session scan A cc2b3c71c90d
backend-dev is an agent published in the GitHub repository omergocmen/vibe-coder-kit (91 stars, last pushed 2mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,743 tokens. 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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