weather

A skill for retrieving current weather and short forecasts for a named place, airport, landmark, or coordinates.

In plain words
What is it for?
Use it for current temperature and conditions, rain checks, and short-range forecasts.
Why use it?
It avoids needing a separate weather lookup or an API key when checking conditions.

Skill for Claude CodeCodex

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/vironnimo/vbot/weather
Any agent
npx skills add Vironnimo/vbot --skill weather
Clone the repo
git clone --depth 1 https://github.com/Vironnimo/vbot

Made for: Claude Code, Codex.

Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 862 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00109 $0.00862
Opus 5 $0.00055 $0.00431
Sonnet 5 $0.00022 $0.00172
Haiku 4.5 $0.00011 $0.00086

Measured yesterday against content hash 7c00ce806d8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

weather 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 yesterday.

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.

resources/skills/weather/SKILL.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Weather

Use this for current conditions, rain and temperature checks, and short-range forecasts — for a city, region, airport code, landmark, or coordinates. You always need a location: if the user gives none and none is clear from context, ask for one.

How to fetch it

Fetch weather with the web_fetch tool against wttr.in, a free service that needs no API key. Always request the JSON format j2:

web_fetch(url: "https://wttr.in/London?format=j2")

Request format=j2 on purpose. web_fetch sends browser-like headers, so for wttr.in's human-readable formats the service answers with decorative HTML/ANSI that is useless to parse. j2 returns compact JSON instead — current conditions plus a 3-day forecast, without the bulky per-hour data — which web_fetch hands back verbatim (a few KB, well within its output cap). Parse that JSON and summarize it; do not read the weather back field by field.

Building the URL

The location goes in the URL path. Encode spaces as +:

  • City or region — https://wttr.in/Berlin?format=j2, https://wttr.in/New+York?format=j2
  • Airport code — https://wttr.in/MUC?format=j2
  • Coordinates — https://wttr.in/48.85,2.35?format=j2
  • Landmark or point of interest — prefix with ~: https://wttr.in/~Eiffel+Tower?format=j2

Reading the JSON

Summarize current_condition[0], nearest_area[0] (to confirm the resolved place), and the first entries of weather[] for the forecast. wttr.in returns both metric and imperial fields — pick the units that fit the user.

Current conditions — current_condition[0]:

  • weatherDesc[0].value — condition text (e.g. "Partly cloudy")
  • temp_C / temp_F — temperature
  • FeelsLikeC / FeelsLikeF — feels-like temperature
  • precipMM — precipitation
  • humidity — relative humidity (%)
  • windspeedKmph / windspeedMiles — wind speed

Forecast — each entry in weather[] (today plus the next days):

  • date
  • mintempC / maxtempC (and the …F variants)
  • avgtempC, uvIndex, and astronomy[0] for sunrise / sunset

Read the full file on GitHub · 54 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. yesterday First seen · 54 lines · 109 tokens per session scan A 7c00ce806d8b

Subscribe to this mod's changes

weather is a skill published in the GitHub repository Vironnimo/vbot (1 stars, last pushed 2d ago), licensed Apache-2.0. It adds 109 tokens to every session and 862 once invoked, about $0.0005 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 2026-08-31.

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