agentmods.dev

nixos-remote-cache-expert

nixos-remote-cache-expert is a skill for Claude Code, Codex from VoidNxSEC/securellm-mcp. It costs 89 tokens per session (3,129 once invoked), scanned B, original, Apache-2.0.

A NixOS and Linux guide focused on remote cache servers: machines that store built packages so other machines can download them instead of rebuilding. It is aimed at small or resource-limited hardware.

In plain words
What is it for?
Use it to set up, troubleshoot, optimize, or plan a NixOS remote cache server while considering RAM, CPU, storage, and network limits.
Why use it?
It helps assess whether modest hardware can handle caching work and suggests realistic tuning, workarounds, or upgrade paths.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument.

not rated 0repo 1mo ago B scan 89 tokens original Apache-2.0

Good fit Use it to set up, troubleshoot, optimize, or plan a NixOS remote cache server while considering RAM, CPU, storage, and network limits.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert
View source ↗ VoidNxSEC/securellm-mcp
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.

Any agent
npx skills add VoidNxSEC/securellm-mcp --skill nixos-remote-cache-expert
Clone the repo
git clone --depth 1 https://github.com/VoidNxSEC/securellm-mcp

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 nixos-remote-cache-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert/github.svg)](https://agentmods.dev/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert)
Your own site
<a href="https://agentmods.dev/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert"><img src="https://agentmods.dev/badge/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert/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 nixos-remote-cache-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert"><img src="https://agentmods.dev/badge/skills/voidnxsec/securellm-mcp/nixos-remote-cache-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,129 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00089 $0.03129
Opus 5 $0.00044 $0.01564
Sonnet 5 $0.00018 $0.00626
Haiku 4.5 $0.00009 $0.00313

Measured 8d ago against content hash 079c090f9428, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

nixos-remote-cache-expert scanned grade B with 2 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 8d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/diagnose_system.sh, scripts/generate_cache_config.py, scripts/monitor_performance.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo nixos-rebuild switch

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl http://localhost:5000/nix-cache-info
skills/Linux_Server_Master/nixos-remote-cache-expert/SKILL.md · 484 lines

How it starts

The opening of the file, as written. The whole thing — 484 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NixOS Remote Cache Server Expert

You are now a Senior Linux System Administrator and DevOps Expert specializing in NixOS cache servers for small-to-medium deployments. Your expertise covers:

  • Cloud & On-Premises: From home labs to small business infrastructure
  • Resource Optimization: Making modest hardware perform optimally
  • Network Engineering: Direct connections, TCP tuning, performance optimization
  • Realistic Assessment: Honest about hardware limitations and when to upgrade
  • Creative Workarounds: Finding unconventional solutions to constraints

Core Principles

1. Honesty Over Optimism

If hardware is insufficient for a task, say so clearly and propose alternatives:

  • Upgrade path with cost/benefit analysis
  • Workaround strategies with trade-offs
  • Alternative architectures

2. Hardware-Aware Solutions

Every recommendation must consider the actual hardware profile:

  • 4GB RAM ≠ 16GB RAM configurations
  • Pentium ≠ Ryzen optimizations
  • HDD ≠ SSD I/O patterns

3. Measure Before Optimizing

Always establish baselines before tuning:

  • Use scripts/diagnose_system.sh for initial assessment
  • Document current performance
  • Change one variable at a time
  • Measure impact

4. Progressive Disclosure

Start simple, add complexity only when needed:

  • Basic setup → Works
  • Monitoring → Visibility
  • Optimization → Performance
  • Advanced features → When justified

When to Use This Skill

Primary triggers:

  • "Setup NixOS cache server"
  • "Optimize Nix binary cache"
  • "Cache server on low-spec hardware"
  • "Direct network connection for cache"
  • "NixOS cache troubleshooting"
  • "Plan hardware upgrade for cache server"
  • "Slow builds" or "performance issues"

Also relevant for:

  • General NixOS server optimization
  • Network topology planning for local services
  • Black Friday hardware upgrade planning
  • Resource-constrained Linux deployments

Workflow & Resources

Phase 1: Assessment

Objective: Understand current state and constraints

Read the full file on GitHub · 484 lines

Files

What ships with it

8 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. 8d ago First seen · 484 lines · 89 tokens per session scan B 079c090f9428

Subscribe to this mod's changes

nixos-remote-cache-expert is a skill published in the GitHub repository VoidNxSEC/securellm-mcp (0 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 89 tokens to every session and 3,129 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

CloudDevOps and cloudllm-toolsmcp-servermcp-toolsstdio-mcpvoidnxlabs
Related

Other skills, from other repositories

tencent-pg-inspection

Run routine health inspection for Tencent Cloud PostgreSQL by calling Tencent Cloud OpenAPI directly. This skill can use the full aligned PostgreSQL OpenAPI action set documented in @references/apireference.md. Start with evidence collection first, and require explicit confirmation before any write, fee-impacting, or…

TencentCloudCommunity/mcp-server · 68 tokens

tencent-pg-ops-troubleshooter

Troubleshoot operational issues for Tencent Cloud PostgreSQL by calling Tencent Cloud OpenAPI directly. This skill can use the full aligned PostgreSQL OpenAPI action set documented in @references/apireference.md. Start with evidence collection first, and require explicit confirmation before any write, fee-impacting…

TencentCloudCommunity/mcp-server · 72 tokens

cloud-k8s

Use for authorized cloud, container, and Kubernetes security assessment including metadata SSRF, IAM misconfig, container escape paths, and cluster RBAC review.

xAmirHamza77/ReverseOps-Skill · 35 tokens

api-workers

Cloudflare Workers deployment using createWorkerHandler from @cyanheads/mcp-ts-core/worker. Covers the full handler signature, binding types, CloudflareBindings extensibility, runtime compatibility guards, and wrangler.toml requirements.

cyanheads/pubchem-mcp-server · 51 tokens

api-workers

Cloudflare Workers deployment using createWorkerHandler from @cyanheads/mcp-ts-core/worker. Covers the full handler signature, binding types, CloudflareBindings extensibility, runtime compatibility guards, and wrangler.toml requirements.

cyanheads/brapi-mcp-server · 51 tokens

api-workers

Cloudflare Workers deployment using createWorkerHandler from @cyanheads/mcp-ts-core/worker. Covers the full handler signature, binding types, CloudflareBindings extensibility, runtime compatibility guards, and wrangler.toml requirements.

cyanheads/calculator-mcp-server · 51 tokens