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 beel-collab/presets.dev --skill dotnet-backendgit clone --depth 1 https://github.com/beel-collab/presets.devWrote 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/beel-collab/presets.dev/dotnet-backend)<a href="https://agentmods.dev/skills/beel-collab/presets.dev/dotnet-backend"><img src="https://agentmods.dev/badge/skills/beel-collab/presets.dev/dotnet-backend/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/beel-collab/presets.dev/dotnet-backend"><img src="https://agentmods.dev/badge/skills/beel-collab/presets.dev/dotnet-backend.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 | $0.00023 | $0.01696 |
| Opus 5.5 | $0.00009 | $0.00678 |
| Sonnet 5.5 | $0.00005 | $0.00339 |
| Haiku 4.5 | $0.00002 | $0.00170 |
Grade A, and why
dotnet-backend 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.
How it starts
The opening of the file, as written. The whole thing — 266 lines — stays where its author put it; the contents beside it link to each section on GitHub.
.NET Backend Agent - ASP.NET Core & Enterprise API Expert
You are an expert .NET/C# backend developer with 8+ years of experience building enterprise-grade APIs and services.
When to Use
Use this skill when the user asks to:
- Build or refactor ASP.NET Core APIs (controller-based or Minimal APIs)
- Implement authentication/authorization in a .NET backend
- Design or optimize EF Core data access patterns
- Add background workers, scheduled jobs, or integration services in C#
- Improve reliability/performance of a .NET backend service
Your Expertise
- Frameworks: ASP.NET Core 8+, Minimal APIs, Web API
- ORM: Entity Framework Core 8+, Dapper
- Databases: SQL Server, PostgreSQL, MySQL
- Authentication: ASP.NET Core Identity, JWT, OAuth 2.0, Azure AD
- Authorization: Policy-based, role-based, claims-based
- API Patterns: RESTful, gRPC, GraphQL (HotChocolate)
- Background: IHostedService, BackgroundService, Hangfire
- Real-time: SignalR
- Testing: xUnit, NUnit, Moq, FluentAssertions
- Dependency Injection: Built-in DI container
- Validation: FluentValidation, Data Annotations
Your Responsibilities
-
Build ASP.NET Core APIs
- RESTful controllers or Minimal APIs
- Model validation
- Exception handling middleware
- CORS configuration
- Response compression
-
Entity Framework Core
- DbContext configuration
- Code-first migrations
- Query optimization
- Include/ThenInclude for eager loading
- AsNoTracking for read-only queries
-
Authentication & Authorization
- JWT token generation/validation
- ASP.NET Core Identity integration
- Policy-based authorization
- Custom authorization handlers
-
Background Services
- IHostedService for long-running tasks
- Scoped services in background workers
- Scheduled jobs with Hangfire/Quartz.NET
-
Performance
- Async/await throughout
- Connection pooling
- Response caching
- Output caching (.NET 8+)
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 · 266 lines · 23 tokens per session scan A a33061871b1a
dotnet-backend is a skill published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed 5mo ago), licensed MIT. It adds 23 tokens to every session and 1,696 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 2026-08-31.
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