A guide for general .NET development, including checking the installed SDK and choosing the right area of the platform for a task.

Use it for .NET CLI commands, building, running, testing, package management, environment checks, and routing work to APIs, MVC, Razor Tag Helpers, Entity Framework Core, or C#.

It provides a clear starting point when a .NET request is broad or its specific area is not yet known.

neo-dotnet — Skill for Claude Code and Codex by Benknightdark

Install

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.

Any agent

npx skills add Benknightdark/neo-skills --skill neo-dotnet

Clone the repo

git clone --depth 1 https://github.com/Benknightdark/neo-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/benknightdark/neo-skills/neo-dotnet/github.svg)](https://agentmods.dev/skills/benknightdark/neo-skills/neo-dotnet)

Your own site

<a href="https://agentmods.dev/skills/benknightdark/neo-skills/neo-dotnet"><img src="https://agentmods.dev/badge/skills/benknightdark/neo-skills/neo-dotnet/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/benknightdark/neo-skills/neo-dotnet"><img src="https://agentmods.dev/badge/skills/benknightdark/neo-skills/neo-dotnet.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 638 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00080	$0.00638
Opus 5	$0.00040	$0.00319
Sonnet 5	$0.00016	$0.00128
Haiku 4.5	$0.00008	$0.00064

Measured 11d ago against content hash 9f24efe7b2fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

neo-dotnet 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 11d 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.

skills/neo-dotnet/SKILL.md · 48 lines

How it starts

The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.

.NET Core Routing Skill

Overview

This skill serves as the unified entry point for the .NET development environment. It ensures the system environment meets the requirements for modern .NET development, and has the capability to analyze user requirements, generate corresponding command-line operations, and route to the appropriate domain expert skills.

Core Responsibilities (Perceive & Act)

Environment Detection and Version Validation
- Run dotnet --version to check the currently installed SDK version.
- Mandatory requirement: Only .NET 6 or higher is supported. If a version lower than .NET 6 is detected, prompt the user to upgrade.
Execute Appropriate .NET CLI
- Provide or execute modern CLI commands based on the detected version and project state.
- Examples:
  - Build and run: dotnet build, dotnet run
  - Test: dotnet test
  - Package management: dotnet add package, dotnet tool restore
Requirement Analysis and Dynamic Skill Routing
- Determine the involved domain based on the user's specific problem or project architecture.
- If the user's task falls into the following specific domains, prepare to use or recommend the corresponding sub-skill:
  - neo-dotnet-minimal-apis: When the requirement is for lightweight routing development, high-performance microservices, and Controllers are not used.
  - neo-dotnet-webapi: When the requirement is for traditional RESTful API development following the controller pattern.
  - neo-dotnet-mvc: When the requirement involves Server-Side Rendering (SSR), Razor views, and ViewModels.
  - neo-dotnet-tag-helper: When the requirement is for developing custom Razor Tag Helpers using pure C# (without CSHTML), focusing on reusable UI components and logic.
  - neo-dotnet-ef-core: When the requirement involves database migrations, Linq query optimization, or model mapping.

Usage Guidelines

When this skill is triggered, please prioritize checking the SDK environment, then answer the user's .NET-related questions. If the problem is found to belong to one of the four professional domains mentioned above, proactively suggest and prepare to delegate it to the corresponding expert skill for processing.

Read the full file on GitHub · 48 lines

Changes

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.

11d ago First seen · 48 lines · 80 tokens per session scan A 9f24efe7b2fd

Subscribe to this mod's changes

neo-dotnet is a skill published in the GitHub repository Benknightdark/neo-skills (7 stars, last pushed 5d ago), licensed MIT. It adds 80 tokens to every session and 638 once invoked, about $0.0004 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 2026-08-31.

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