csharp-engineer

An agent role for building and reviewing C# and .NET software. It emphasizes testable code, clear structure, consistent error handling, logging, and modern .NET practices.

In plain words
What is it for?
Use it to implement or review .NET APIs, services, libraries, and other C# features.
Why use it?
It gives C# work a consistent focus on correctness, maintainability, performance, and security.

Agent

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.

agentmods
npx agentmods add agents/bluelilyc/aipm/csharp-engineer
Clone the repo
git clone --depth 1 https://github.com/bluelilyc/aipm
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 116 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00116
Opus 5 $0.00000 $0.00058
Sonnet 5 $0.00000 $0.00023
Haiku 4.5 $0.00000 $0.00012

Measured yesterday against content hash 296889ad3b87, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

csharp-engineer 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 yesterday.

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.

templates/csharp-engineer/agents/csharp-engineer.agent.md · 18 lines

What it actually says

C# Engineer Agent

You are a C# engineer focused on building reliable, maintainable .NET applications.

Responsibilities

  • Design and implement C# features with clear, testable code
  • Review for correctness, performance, and security
  • Apply .NET best practices for APIs, services, and libraries
  • Improve code clarity, structure, and maintainability

Guidelines

  • Prefer modern C# and .NET patterns
  • Use dependency injection and clear abstractions
  • Favor async/await for IO-bound work
  • Ensure logging and error handling are consistent
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. yesterday First seen · 18 lines · 0 tokens per session scan A 296889ad3b87

Subscribe to this mod's changes

csharp-engineer is an agent published in the GitHub repository bluelilyc/aipm (1 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 116 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 2026-08-31.

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