OpenShell: Skill for Claude Code

.agents/skills/helm-dev-environment/SKILL.md

helm-dev-environment is a skill for Claude Code, Codex from NVIDIA/OpenShell. It costs 137 tokens per session (8,221 once invoked), scanned C, original, Apache-2.0.

Instructions for running a local Kubernetes development environment, where Kubernetes manages containers and their supporting services. It uses k3d, Skaffold, and Helm to create the cluster, build images, and deploy the OpenShell chart.

In plain words
What is it for?
Use it to create, configure, test, and remove an OpenShell development cluster, including optional Keycloak, Envoy Gateway, high-availability testing, tracing, and local sandbox images.
Why use it?
It turns the setup and teardown of the local cluster into a documented workflow, including required tools, port handling, and optional observability and authentication components.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is NVIDIA/OpenShell's own configuration. It tells Claude Code and Codex how to work on OpenShell 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 OpenShell configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is KUBECONFIG=../../../kubeconfig skaffold run -p shared-supervisor-high-availability.

About the project

OpenShell is a runtime for autonomous AI agents that executes them in sandboxed environments governed by declarative policies. It is used to restrict agents' access to files, credentials, data, and network resources, and the catalogue includes skills and workflows for operating and contributing to it.

NVIDIA/OpenShell · 21,172 stars · on GitHub · docs.nvidia.com

Reuse

Borrowing it

Nothing to install: this file belongs to NVIDIA/OpenShell. 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/NVIDIA/OpenShell/main/.agents/skills/helm-dev-environment/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/NVIDIA/OpenShell

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.

agentmods badge for helm-dev-environment

README.md
[![agentmods](https://agentmods.dev/badge/skills/nvidia/openshell/helm-dev-environment/github.svg)](https://agentmods.dev/skills/nvidia/openshell/helm-dev-environment)
Your own site
<a href="https://agentmods.dev/skills/nvidia/openshell/helm-dev-environment"><img src="https://agentmods.dev/badge/skills/nvidia/openshell/helm-dev-environment/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 helm-dev-environment

Your own site · 80×15
<a href="https://agentmods.dev/skills/nvidia/openshell/helm-dev-environment"><img src="https://agentmods.dev/badge/skills/nvidia/openshell/helm-dev-environment.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 137 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,221 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 14 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 30
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 32
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 43
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 166
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 168
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 170
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 166
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 168
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 170
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 203
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Tool Misuse · line 302
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
  • high Tool Misuse · line 303
    Tool parameters are crafted to achieve unintended or unsafe behavior. Parameter abuse can bypass intended safety checks (e.g. shell=True, --force, dangerous glob patterns).
    Fix: Validate all tool parameters against an allowlist. Reject dangerous parameter values (shell=True, --force, -rf /) and use safe defaults.
  • medium Rogue Agent · line 89
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
  • medium Rogue Agent · line 165
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
How audits are shown
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 $0.00137 $0.08221
Opus 5.5 $0.00055 $0.03288
Sonnet 5.5 $0.00027 $0.01644
Haiku 4.5 $0.00014 $0.00822

Measured yesterday against content hash c778cce7ac5e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

helm-dev-environment scanned grade C with 1 finding 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf deploy/helm/openshell/charts/postgresql
.agents/skills/helm-dev-environment/SKILL.md · 680 lines

How it starts

The opening of the file, as written. The whole thing — 680 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Helm Dev Environment

Set up, run, and tear down the local Kubernetes development environment for OpenShell. The stack is: k3d (Docker-backed k3s) for the cluster, Skaffold for image builds and Helm deploys, and the OpenShell Helm chart (deploy/helm/openshell/).


Prerequisites

  • Docker Desktop (macOS) or Docker Engine (Linux) running
  • mise install completed (provides k3d, kubectl, skaffold, helm)

Startup

1. Create the cluster

mise run helm:k3s:create

Creates a k3d cluster and merges its kubeconfig into the worktree-local kubeconfig file. When the named cluster already exists, the task starts any stopped containers and refreshes same-named kubeconfig entries so a recreated load balancer's current API port takes effect. Also applies the upstream agent-sandbox CRDs/controller (pinned via AGENT_SANDBOX_VERSION in tasks/scripts/helm-k3s-local.sh, fetched from github.com/kubernetes-sigs/agent-sandbox releases), enables its OTLP tracing on v0.5 and later, installs an OTLP trace collector and UI in the observability namespace, and preloads the default sandbox image into k3d so the first sandbox create does not wait on a large registry pull. Traefik is disabled at cluster creation time.

Multi-worktree support: the cluster name is derived from the last component of the current git branch (e.g. branch chore/1234-local-dev/octocat → cluster openshell-dev-octocat). Each worktree therefore gets its own isolated cluster and its own kubeconfig file. Override with HELM_K3S_CLUSTER_NAME to force a specific name or share one cluster across worktrees.

Port mappings created at cluster time (cannot be changed without recreating):

Host port Target Used by
8080 Port 80 via k3d load balancer Envoy Gateway LoadBalancer service (values-gateway.yaml)

Override with env vars before running helm:k3s:create:

  • HELM_K3S_LB_HOST_PORT (default: 8080)
  • HELM_K3S_PRELOAD_SANDBOX_IMAGE (default: nvcr.io/nvidia/base/ubuntu:24.04; set to an empty value to skip)
  • HELM_K3S_COLLECTOR_IMAGE (default: mcr.microsoft.com/dotnet/aspire-dashboard:latest)
  • HELM_K3S_COLLECTOR_HEALTH_TIMEOUT (default: 120 seconds)

Read the full file on GitHub · 680 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.

  1. yesterday Changed · +11 lines c778cce7ac5e
  2. 3d ago Changed · +21 lines 949154ad7a3a
  3. 6d ago Changed · +34 lines 7e00e80f2016
  4. 8d ago Changed · +3 lines bbcf86930f59
  5. 9d ago Changed · +101 lines c7dbbedbadf7
  6. 15d ago Changed · +18 lines ec8f7412f70b
  7. 16d ago Changed · +21 lines 1704aa95ce53
  8. 17d ago Changed · +9 lines f9ccb6962120
  9. 28d ago Changed · +1 lines bd0eeaaa3cd6
  10. 1mo ago First seen · 461 lines · 137 tokens per session scan C 8c48a431d99b

Subscribe to this mod's changes

helm-dev-environment is a skill published in the GitHub repository NVIDIA/OpenShell (21,172 stars, last pushed yesterday), licensed Apache-2.0. It adds 137 tokens to every session and 8,221 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

helm-dev-environment compared with skills from other repositories

helm-dev-environment next to 6 skills from other repositories
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agent-bomLeoYeAI/openclaw-master-skillsSkill2.2k5d agoMITA99Claude Code, Codex
compute-env-setupUnicomAI/wanwuSkill2.4k14d agoApache-2.0A134Claude Code, Codex