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is-gps-200n

is-gps-200n is a skill for Claude Code from jgsystemsconsulting/jgs-se-knowledge-packs. It costs 115 tokens per session (1,369 once invoked), scanned A, original, no licence file.

A reference guide for understanding and writing interface specifications for NAVSTAR GPS, the satellite navigation system. It uses a real GPS interface document as an example.

In plain words
What is it for?
Use it to study interface-control documents, distinguish interface definitions from identifiers, and examine examples of signal and navigation-data specifications.
Why use it?
It helps clarify how systems define shared interfaces, manage changes, and describe navigation data without starting from abstract rules.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the jgs-se-knowledge-packs plugin — 83 skills shipped together

not rated 54repo +62 3d ago A scan 115 tokens custom licence

Good fit Use it to study interface-control documents, distinguish interface definitions from identifiers, and examine examples of signal and navigation-data specifications.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n
View source ↗ jgsystemsconsulting/jgs-se-knowledge-packs jgsystemsconsulting.github.io
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 jgsystemsconsulting/jgs-se-knowledge-packs --skill is-gps-200n
Clone the repo
git clone --depth 1 https://github.com/jgsystemsconsulting/jgs-se-knowledge-packs

Made for: Claude Code.

Or install jgs-se-knowledge-packs, the plugin that ships this one along with the rest of its 83 skills.

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 is-gps-200n

README.md
[![agentmods](https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n/github.svg)](https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n)
Your own site
<a href="https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n"><img src="https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n/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 is-gps-200n

Your own site · 80×15
<a href="https://agentmods.dev/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n"><img src="https://agentmods.dev/badge/skills/jgsystemsconsulting/jgs-se-knowledge-packs/is-gps-200n.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 115 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,369 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00115 $0.01369
Opus 5.5 $0.00046 $0.00548
Sonnet 5.5 $0.00023 $0.00274
Haiku 4.5 $0.00012 $0.00137

Measured 2mo ago against content hash 4e76b1b6af36, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

is-gps-200n 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 2mo 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.

packs/is-gps-200n/SKILL.md · 75 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

11 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. 2mo ago First seen · 75 lines · 115 tokens per session scan A 4e76b1b6af36

Subscribe to this mod's changes

is-gps-200n is a skill published in the GitHub repository jgsystemsconsulting/jgs-se-knowledge-packs (54 stars, last pushed 3d ago), with no licence file. It adds 115 tokens to every session and 1,369 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-08-31.

Claude CodeHardware and IoTagent-skillsdodfaagaoknowledge-packs
Related

is-gps-200n compared with skills from other repositories

is-gps-200n next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
is-gps-200njgsystemsconsulting/jgs-se-knowledge-packsSkill543d agononeA115Claude Code
offensive-z-waveSnailSploit/Claude-RedSkill10k26d agoMITA113Claude Code, Codex
hsb-flashNVIDIA/skillsSkill3.9ktodayApache-2.0B94Claude Code
pcbwayaklofas/kicad-happySkill1.6ktodayMITA119Claude Code
unifi-protectsirkirby/unifi-mcpSkill1.0kyesterdayMITA112Claude Code
akg-agentsXiaoLuoLYG/GODSkill1.3k15d agoApache-2.0A75Claude Code, Codex
triton-ascend-case-reduction-amin-atomicmindspore-ai/akgSkill2662d agoApache-2.0A85Claude Code, Codex