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.
npx skills add easyzoom/aix-skills --skill gnss-gps-integrationgit clone --depth 1 https://github.com/easyzoom/aix-skillsWrote 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.
[](https://agentmods.dev/skills/easyzoom/aix-skills/gnss-gps-integration)<a href="https://agentmods.dev/skills/easyzoom/aix-skills/gnss-gps-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/gnss-gps-integration/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.
<a href="https://agentmods.dev/skills/easyzoom/aix-skills/gnss-gps-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/gnss-gps-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.01484 |
| Opus 5 | $0.00034 | $0.00742 |
| Sonnet 5 | $0.00013 | $0.00297 |
| Haiku 4.5 | $0.00007 | $0.00148 |
Grade A, and why
gnss-gps-integration 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GNSS GPS Integration
Overview
Use this skill to connect a GNSS/GPS module to an MCU over UART and turn raw output into a trusted fix. The hard parts are proving the byte stream is intact (NMEA XOR checksum, UBX sync), rejecting invalid fixes, and getting acceptable TTFF given antenna, sky view, and backup-power constraints.
When To Use
Use this skill when:
- The user integrates u-blox
NEO-M8N,NEO-M9N,MAX-M10, or QuectelL76/L80/LC76over UART. - The work involves parsing
$GxGGA,$GxRMC,$GxGSA,$GxGSV, the*hhXOR checksum, or the UBX binary protocol (0xB5 0x62,UBX-NAV-PVT). - Symptoms include no satellites, TTFF too long,
RMCstatusV, lat/lon of 0, truncated NMEA frames, or PPS not toggling. - Configuration uses the legacy
UBX-CFG-PRT/UBX-CFG-MSGmessages (M8-era), the config-key interfaceUBX-CFG-VALSET/UBX-CFG-VALGET(M9/M10), or PMTK sentences (PMTK251,PMTK220,PMTK314).
Do not use this skill when the UART link itself is unproven; confirm bytes arrive at the correct baud first.
First Questions
Ask for:
- Exact module and vendor (u-blox M8/M9/M10 vs Quectel Lxx), since protocol and config differ.
- UART baud (u-blox default
9600, Quectel L76 default9600), wiring (TX/RX crossed, CMOS 3V3 levels). - Active vs passive antenna, its supply/bias-T, and current sky visibility (indoors vs open sky).
- Backup power: is
V_BCKP/RTC battery or supercap fitted, or does the module lose power fully each cycle? - Whether the design needs continuous or low-power periodic fixes, and if PPS time sync is required.
- Current raw output (paste a few NMEA lines) and the observed failure.
Integration Checklist
-
Prove the raw stream. Log UART bytes at the module's default baud before parsing; confirm
$G...ASCII lines or UBX0xB5 0x62frames, not garbage from a baud mismatch. -
Validate every sentence. Compute the XOR of all chars between
$and*, compare to the two hex digits after*, and drop the line on mismatch or missing CR/LF instead of parsing junk.
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.
- 12d ago First seen · 86 lines · 67 tokens per session scan A 62526b563ca4
gnss-gps-integration is a skill published in the GitHub repository easyzoom/aix-skills (31 stars, last pushed 1mo ago), licensed MIT. It adds 67 tokens to every session and 1,484 once invoked, about $0.0003 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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