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 agentmods add commands/joshuaramirez/roslynmcpserver/setupgit clone --depth 1 https://github.com/JoshuaRamirez/RoslynMcpServerWhat 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 | $0.00010 | $0.00331 |
| Opus 5 | $0.00005 | $0.00166 |
| Sonnet 5 | $0.00002 | $0.00066 |
| Haiku 4.5 | $0.00001 | $0.00033 |
Grade A, and why
setup scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Roslyn MCP Server Setup
Install and verify the Roslyn MCP Server .NET global tool.
Step 1: Check Prerequisites
Verify .NET SDK is installed (9.0+ required):
dotnet --version
If not installed, direct the user to https://dotnet.microsoft.com/download/dotnet/9.0
Step 2: Check Existing Installation
Check if roslyn-mcp is already installed:
dotnet tool list -g | grep -i roslyn
Step 3: Install the Tool
If not installed:
dotnet tool install -g RoslynMcp.Server
If already installed and needs updating:
dotnet tool update -g RoslynMcp.Server
Step 4: Verify Installation
Confirm the tool is available on PATH:
which roslyn-mcp
Then verify it runs:
roslyn-mcp --help
Troubleshooting
If roslyn-mcp is not found after install:
- Ensure
~/.dotnet/toolsis on your PATH - For zsh:
export PATH="$HOME/.dotnet/tools:$PATH"in~/.zshrc - For bash:
export PATH="$HOME/.dotnet/tools:$PATH"in~/.bashrc - Restart your terminal after PATH 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.
- 3d ago First seen · 63 lines · 10 tokens per session scan A 202a964ea1eb
setup is a command published in the GitHub repository JoshuaRamirez/RoslynMcpServer (27 stars, last pushed 3d ago), licensed MIT. It adds 10 tokens to every session and 331 once invoked, about $0.0001 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 2026-08-30.
Other commands, from other repositories
analyze
Analyze a .NET project or solution — list projects, check diagnostics, and present a structured summary.
make-avaloniaui-custom-control
HTML/CSS to AvaloniaUI AXAML conversion command.
dotnet-review
Multi-agent .NET code review - up to five reviewers in parallel (correctness, performance, security/observability, data/messaging/integration, generalist), then an adversarial maintainer pass that refutes weak findings. Runs the bundled dotnet-review workflow; reviewer model scales with change size.
dumpstack
Helps examine thread call stacks. While clrstack is more commonly used for managed call stacks, dumpstack can also be used to inspect stack frames, including native ones.
dumpclass
Digs into .NET type metadata. Displays information about an EEClass structure.
eeheap
Displays information about the managed heap, including memory usage for each generation (Gen 0, Gen 1, Gen 2, and Large Object Heap).