nisar-snow-predict

nisar-snow-predict is a skill for Claude Code, Codex from responsible-genai-hackweek/nicer-nisar. It costs 108 tokens per session (1,635 once invoked), scanned C, original, BSD-3-Clause.

A workflow for predicting changes in snow depth from real NISAR satellite data over the Mores Creek study area.

In plain words
What is it for?
Use it to request a snow-depth-change map or estimate for the supported area and season.
Why use it?
It turns a request into a location and season, lets the user choose an available satellite data pair, and reports the model's result with its limitations.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

Good fit Use it to request a snow-depth-change map or estimate for the supported area and season.

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Install with agentmods
npx agentmods add skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict
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 responsible-genai-hackweek/nicer-nisar --skill nisar-snow-predict
Clone the repo
git clone --depth 1 https://github.com/responsible-genai-hackweek/nicer-nisar

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 nisar-snow-predict

README.md
[![agentmods](https://agentmods.dev/badge/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict/github.svg)](https://agentmods.dev/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict)
Your own site
<a href="https://agentmods.dev/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict"><img src="https://agentmods.dev/badge/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict/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 nisar-snow-predict

Your own site · 80×15
<a href="https://agentmods.dev/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict"><img src="https://agentmods.dev/badge/skills/responsible-genai-hackweek/nicer-nisar/nisar-snow-predict.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,635 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.
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 $0.00108 $0.01635
Opus 5 $0.00054 $0.00817
Sonnet 5 $0.00022 $0.00327
Haiku 4.5 $0.00011 $0.00163

Measured 11d ago against content hash 3d889f672f21, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade C, and why

nisar-snow-predict 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 11d 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.

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

Earthdata Login via `~/.netrc`; CMR search did not.
contributors/ibrahim/skills/nisar-snow-predict/SKILL.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Predicting snow depth change

The user-facing half of the system (workflow B in CLAUDE.md). Deterministic, pinned, and it never trains. Your job here is at the two edges — turning a request into a query, and turning a raster into an honest sentence. Everything between those is called, not reasoned about.

request → list_acquisitions(aoi, season) → user picks → predict_snow_depth() → report
   ^ you                                      ^ them                             ^ you

1. Parse the request

from nisar_snow import config as C
from nisar_snow.catalog import list_acquisitions

pairs = list_acquisitions(C.AOI_BOUNDS_LONLAT, season=("2025-12-01", "2026-01-31"))

Defaults that are almost always right: aoi_lonlat=C.AOI_BOUNDS_LONLAT (the NIVAL flight box) and season=("2025-11-01", "2026-04-30"). Only widen the AOI if the user names somewhere else — and if they do, say plainly that the model was fit at Mores Creek and the ancillary layers are the NIVAL LiDAR, so it does not transfer.

list_acquisitions hits public CMR and needs no auth. It applies the peak-SWE cutoff itself (invariant 3, water year). Do not filter by date again afterwards; you will double-apply it.

2. Present pairs. Do not pick one.

Invariant 2. list_acquisitions offers, the user chooses. Show ref_date, sec_date, track, baseline_days, and let them decide. This is the whole point of the availability-first design — the user picks from what flew rather than naming a date the satellite did not image.

If they say "just use the best one," that is explicit delegation and you may pick — say which you picked and why. Silently picking is the failure mode.

Expect ~10 usable ascending pairs, tracks 077 and 149, over Nov 2025 – Apr 2026. Zero descending are usable here.

3. Predict

from nisar_snow.predict import predict_snow_depth, MeltCorrupted
prod = predict_snow_depth(C.AOI_BOUNDS_UTM, granule_id, model_id)

Or python scripts/run_predict.py <model_id> <granule_id>. Granule bytes need Earthdata Login via ~/.netrc; CMR search did not.

Read the full file on GitHub · 134 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. 11d ago First seen · 134 lines · 108 tokens per session scan C 3d889f672f21

Subscribe to this mod's changes

nisar-snow-predict is a skill published in the GitHub repository responsible-genai-hackweek/nicer-nisar (2 stars, last pushed 13d ago), licensed BSD-3-Clause. It adds 108 tokens to every session and 1,635 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 1 finding (reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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