build-openshell-mxc-windows

A build and test process for compiling OpenShell on Windows with Microsoft’s C++ compiler tools, for both x64 and ARM64 computers. It checks the Windows programs without turning Windows into a container or virtual-machine host.

In plain words
What is it for?
Use it when changing Windows compilation, Windows build tasks, unsupported Windows driver behavior, or Windows build reports.
Why use it?
It provides a defined way to verify that the Windows build still works while keeping unsupported runtime features out of scope.

Skill for Claude CodeCodex

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 skills/nvidia/openshell/build-openshell-mxc-windows
Any agent
npx skills add NVIDIA/OpenShell --skill build-openshell-mxc-windows
Clone the repo
git clone --depth 1 https://github.com/NVIDIA/OpenShell

Made for: Claude Code, Codex.

Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,329 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 $0.00085 $0.04329
Opus 5 $0.00043 $0.02165
Sonnet 5 $0.00017 $0.00866
Haiku 4.5 $0.00009 $0.00433

Measured today against content hash 8395c27517ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

build-openshell-mxc-windows 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 today.

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.

.agents/skills/build-openshell-mxc-windows/SKILL.md · 342 lines

How it starts

The opening of the file, as written. The whole thing — 342 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build OpenShell-MXC for Windows

This skill maintains the existing native Windows MSVC build lane in the OpenShell repository. The Windows lane is already present in main; do not treat this skill as a first-time porting recipe unless the user explicitly asks for a new fork or a from-scratch bring-up.

The lane is build-only. It validates that OpenShell can compile and test on Windows MSVC for the supported deliverables:

  • openshell-gateway.exe
  • openshell.exe

It intentionally does not make Windows a Docker, Kubernetes, Podman, or VM runtime host.

Current Repository Shape

The Windows build lane is implemented by these tracked files:

Path Purpose
tasks/windows.toml Mise task entry points for windows:* commands.
tasks/rust.toml, tasks/test.toml, and tasks/markdown.toml Windows routing for compiler-bearing checks, explicit Unix-only test skips, and Markdown dependency setup.
tasks/scripts/windows-msvc.ps1 PowerShell wrapper that enters the Visual Studio developer environment and invokes Cargo.
.github/workflows/windows-msvc.yml Manually dispatched GitHub Actions jobs with architecture-specific Rust caches for x64 and future ARM64 Windows validation.
architecture/windows-msvc-build.md Design notes and validation contract.
.agents/skills/build-openshell-mxc-windows/ This skill and companion reference material.

Use the code that is already in the repo. Do not generate a parallel Windows build system, duplicate the wrapper, or add repository automation that the user did not request.

Scope

In scope:

  • Refreshing a local checkout to the latest upstream GitHub main.
  • Maintaining tasks/windows.toml and tasks/scripts/windows-msvc.ps1.
  • Running x64 and ARM64 MSVC checks.
  • Building x64 and ARM64 release binaries for openshell-gateway and openshell.
  • Running workspace tests on a native x64 or ARM64 host.
  • Running focused unsupported-driver contract tests.
  • Reporting test counts, skipped/gated areas, warnings, artifacts, and logs.
  • Keeping Linux and macOS build paths unchanged.
  • Keeping unsupported Windows compute drivers explicit and testable.

Read the full file on GitHub · 342 lines

Files

What ships with it

1 file 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. today Changed 8395c27517ab
  2. 2d ago First seen · 342 lines · 85 tokens per session scan A f31dc04f593a

Subscribe to this mod's changes

build-openshell-mxc-windows is a skill published in the GitHub repository NVIDIA/OpenShell (8,475 stars, last pushed today), licensed Apache-2.0. It adds 85 tokens to every session and 4,329 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 2026-08-30.

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