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 cloudnative-co/claude-code-starter-kit --skill backend-patternsgit clone --depth 1 https://github.com/cloudnative-co/claude-code-starter-kitWrote 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/cloudnative-co/claude-code-starter-kit/backend-patterns)<a href="https://agentmods.dev/skills/cloudnative-co/claude-code-starter-kit/backend-patterns"><img src="https://agentmods.dev/badge/skills/cloudnative-co/claude-code-starter-kit/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/cloudnative-co/claude-code-starter-kit/backend-patterns"><img src="https://agentmods.dev/badge/skills/cloudnative-co/claude-code-starter-kit/backend-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00031 | $0.00342 |
| Opus 5.5 | $0.00012 | $0.00137 |
| Sonnet 5.5 | $0.00006 | $0.00068 |
| Haiku 4.5 | $0.00003 | $0.00034 |
Grade A, and why
backend-patterns 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 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.
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
Backend Development Patterns
Backend architecture patterns and best practices for scalable server-side applications.
Pattern Categories
API Design
RESTful structure, Repository pattern, Service layer, Middleware pattern. See references/api-patterns.md for implementations.
Database & Caching
Query optimization, N+1 prevention, transactions, Redis cache-aside pattern. See references/database-caching.md for implementations.
Error Handling, Auth & Infrastructure
Centralized error handler, retry with backoff, JWT/RBAC, rate limiting, job queues, structured logging. See references/error-auth-infra.md for implementations.
Quick Decision Guide
| Need | Pattern |
|---|---|
| Data access abstraction | Repository pattern |
| Business logic isolation | Service layer |
| Auth/logging/validation | Middleware pattern |
| Expensive DB queries | Cache-aside (Redis) |
| N+1 query problem | Batch fetch with Map |
| Atomic multi-table writes | Database transactions |
| Unreliable external APIs | Retry with exponential backoff |
| Abuse prevention | Rate limiter (in-memory or Redis) |
| Non-blocking operations | Job queue |
Remember: Choose patterns that fit your complexity level. Not every project needs every pattern.
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.
- 1mo ago First seen · 40 lines · 31 tokens per session scan A 15612dbcc108
backend-patterns is a skill published in the GitHub repository cloudnative-co/claude-code-starter-kit (153 stars, last pushed 5d ago), licensed MIT. It adds 31 tokens to every session and 342 once invoked, about $0.0001 per session on Opus 5.5. 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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