PrompterOne: Skill for Codex

.codex/skills/dotnet-project-setup/SKILL.md

dotnet-project-setup is a skill for Codex from managedcode/PrompterOne. It costs 41 tokens per session (417 once invoked), scanned A, original, MIT.

A setup guide for creating or reorganising .NET solutions, including applications, libraries, test projects, shared build settings, and continuous integration.

In plain words
What is it for?
Use it when starting a .NET solution, restructuring one, setting shared SDK or package rules, arranging projects, or adding build and testing foundations.
Why use it?
It helps keep projects separated by responsibility and avoids duplicated settings, circular dependencies, and solutions that are difficult to build or test consistently.

Skill for Codex

Written for Codex: installed under .codex/. Also seen: mentions AGENTS.md.

This is managedcode/PrompterOne's own configuration. It tells Codex how to work on PrompterOne itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything PrompterOne configures →

Reuse

Borrowing it

Nothing to install: this file belongs to managedcode/PrompterOne. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/managedcode/PrompterOne/main/.codex/skills/dotnet-project-setup/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/managedcode/PrompterOne

Made for: 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.

agentmods badge for dotnet-project-setup

README.md
[![agentmods](https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-project-setup/github.svg)](https://agentmods.dev/skills/managedcode/prompterone/dotnet-project-setup)
Your own site
<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-project-setup"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-project-setup/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.

agentmods 80×15 button for dotnet-project-setup

Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-project-setup"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-project-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 417 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.00417
Opus 5.5 $0.00016 $0.00167
Sonnet 5.5 $0.00008 $0.00083
Haiku 4.5 $0.00004 $0.00042

Measured 1mo ago against content hash b9e54899ecdf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dotnet-project-setup 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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.codex/skills/dotnet-project-setup/SKILL.md · 40 lines

What it actually says

.NET Project Setup

Trigger On

  • creating a new .NET solution or restructuring an existing one
  • setting up Directory.Build.props, shared package management, or repo-wide defaults
  • defining project layout for apps, libraries, and test projects

Workflow

  1. Start from the app model and deployment target, then choose the smallest correct SDK and target framework set.
  2. Use solution folders and project names that reflect bounded contexts or product areas, not temporary implementation details.
  3. Centralize shared build settings, analyzer rules, nullable context, and package versions where it reduces duplication without hiding important differences.
  4. Create test projects and CI hooks early so new projects do not drift into unverified templates.
  5. Prefer project references and composition over circular dependencies or utility dumping grounds.
  6. Document the local build, test, and run path in repo docs or AGENTS.md when the workflow is not obvious.

Deliver

  • a coherent solution structure
  • shared build defaults that are easy to reason about
  • starter quality and testing hooks for future work

Validate

  • projects have explicit responsibility boundaries
  • shared MSBuild settings do not accidentally override platform-specific needs
  • a new contributor can build and test the repo without guessing

References

  • patterns.md: solution layout conventions, Directory.Build.props, Directory.Build.targets, Central Package Management, global.json, nuget.config, analyzers, multi-targeting, and source link
  • templates.md: dotnet new templates for console apps, class libraries, ASP.NET Core APIs, worker services, Blazor, test projects, .NET Aspire, and gRPC services
Files

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.

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.

  1. 1mo ago First seen · 40 lines · 41 tokens per session scan A b9e54899ecdf

Subscribe to this mod's changes

dotnet-project-setup is a skill published in the GitHub repository managedcode/PrompterOne (45 stars, last pushed 5mo ago), licensed MIT. It adds 41 tokens to every session and 417 once invoked, about $0.0002 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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