weather

Get current weather and forecasts (no API key required).

Install with Tessl CLI

npx tessl i github:HKUDS/nanobot --skill weather

What are skills?

1.19x

Quality

70%

Does it follow best practices?

Impact

100%

1.19x

Average score across 3 eval scenarios

Optimize this skill with Tessl

npx tessl skill review --optimize ./nanobot/skills/weather/SKILL.md

SKILL.md

Review

Evals

Evaluation results

100%

City Weather Summary Dashboard

wttr.in format codes and URL encoding

Criteria

Without context

With context

Uses wttr.in

100%

Uses curl

100%

No API key

100%

Custom format string

100%

%c condition code

100%

%t temperature code

100%

%h humidity code

100%

%w wind code

100%

URL-encodes spaces

100%

At least 4 cities

100%

sample_output.txt present

100%

Without context: $0.5130 · 5m 15s · 29 turns · 36 in / 6,516 out tokens

With context: $0.3919 · 2m 3s · 26 turns · 273 in / 4,106 out tokens

100%

25%

Airport Departure Weather Checker

wttr.in query parameters (units, time scope)

Criteria

Without context

With context

Uses wttr.in

100%

Uses curl

100%

No API key

100%

Airport code in URL

100%

Current-only parameter

13%

100%

Metric units parameter

20%

100%

Argument-driven

100%

sample_runs.txt present

100%

Output is concise

100%

Without context: $0.3661 · 2m 15s · 23 turns · 30 in / 4,318 out tokens

With context: $0.2227 · 58s · 16 turns · 21 in / 2,448 out tokens

100%

15%

Structured Weather Data Collector

Open-Meteo fallback with coordinates

Criteria

Without context

With context

Uses Open-Meteo

100%

No API key

100%

Resolves coordinates

100%

current_weather=true

100%

latitude and longitude params

100%

JSON output

100%

Temperature in output

100%

Wind speed in output

100%

Weather code in output

100%

At least 3 cities

100%

Without context: $0.1650 · 50s · 13 turns · 20 in / 2,381 out tokens

With context: $0.3341 · 1m 5s · 21 turns · 183 in / 3,568 out tokens

Evaluated: 3 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

City Weather Summary Dashboard Airport Departure Weather Checker Structured Weather Data Collector

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