ground-systems

A spaceflight engineering guide for designing the ground segment, the equipment and teams that communicate with and operate a spacecraft. It covers ground stations, contact periods, communication standards, data processing and mission control centre design.

In plain words
What is it for?
Use it to design ground-station networks, plan when spacecraft will be visible, analyse contact windows, work with CCSDS tracking and command protocols, estimate daily data and design a mission operations centre.
Why use it?
It helps connect spacecraft operations to the ground network needed to send commands and receive data. This supports early estimates of coverage, contacts, data volume and operations work.

Skill for Claude CodeCodex

Part of the space-engineering plugin — 12 skills, 5 commands shipped together

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/devideamax/aerospace-team/ground-systems
Any agent
npx skills add devideamax/aerospace-team --skill ground-systems
Clone the repo
git clone --depth 1 https://github.com/devideamax/aerospace-team

Made for: Claude Code, Codex.

Or install space-engineering, the plugin that ships this one along with the rest of its 12 skills, 5 commands.

Per session 132 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,363 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00132 $0.05363
Opus 5 $0.00066 $0.02681
Sonnet 5 $0.00026 $0.01073
Haiku 4.5 $0.00013 $0.00536

Measured 3d ago against content hash a175c32e633b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ground-systems 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.

skills/ground-systems/SKILL.md · 409 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 409 lines · 132 tokens per session scan A a175c32e633b

Subscribe to this mod's changes

ground-systems is a skill published in the GitHub repository devideamax/aerospace-team (21 stars, last pushed 6mo ago), with no licence file. It adds 132 tokens to every session and 5,363 once invoked, about $0.0007 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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