How do I install the Who Growth Charts skill?

Run npx skillmds add modbender/who-growth-charts in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Who Growth Charts safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: executes scripts, makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Who Growth Charts?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Who Growth Charts free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Who Growth Charts?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Who Growth Charts by modbender — Agent Skill

Name: Who Growth Charts
Rating: 4.2 (5 reviews)
Author: modbender

Who Growth Charts

Generate WHO child growth charts (height, weight, BMI) with percentile curves. Downloads official WHO reference data on demand. Use when users ask about child growth tracking, percentiles, or want growth charts for their kids.

modbender d2cf7d6 2 files · 27.1 KB Updated Sep 9, 2026 12 repo stars

File contents

Generate WHO Child Growth Standards charts with percentile curves and child data overlay.

Features

Height-for-age (0-19 years)
Weight-for-age (0-10 years)
BMI-for-age (0-19 years)
Supports boys and girls
Downloads WHO data on demand from cdn.who.int (cached locally)
Overlays child's actual measurements with trend line

Examples

Height	Weight	BMI

Prerequisites

Install Python dependencies:

pip install pandas matplotlib scipy openpyxl

Usage

Basic Chart Generation

python3 ./scripts/growth_chart.py "Child Name" "DD.MM.YYYY" --sex F --type all

Arguments:

name: Child's name (used in chart title)
birthdate: Date of birth in DD.MM.YYYY format
--sex / -s: F (female) or M (male) — default: F
--type / -t: height, weight, bmi, or all — default: all
--data / -d: JSON file with measurement data
--output / -o: Output directory for charts

With Measurement Data

Create a JSON file with height/weight measurements (heights in meters, weights in kg):

{
  "heights": [ ["2024-01-15T10:00:00", 1.05] ],
  "weights": [ ["2024-01-15T10:00:00", 17.5] ]
}

python3 ./scripts/growth_chart.py "Emma" "06.07.2016" --sex F --data emma_data.json --type all

Integration with Withings

Combine with withings-family skill to fetch weight data automatically:

# Get Withings weight data (assuming withings-family skill is installed)
python3 ../withings-family/scripts/withings.py emma body > /tmp/withings.json

# Parse and generate charts
# (The growth chart script handles Withings JSON format if implemented, otherwise transform it)

Output

By default, charts and cache are written to:

<workspace>/who-growth-charts/
<workspace>/who-growth-charts/cache/

Where <workspace> is the folder that contains your skills/ directory (the script finds it automatically; it also prefers the current working directory if it looks like a workspace, which makes symlinked workspaces behave correctly).

You can override workspace discovery with WHO_GROWTH_CHARTS_WORKSPACE=/path/to/workspace.

---name: who-growth-chartsdescription: Generate WHO child growth charts (height, weight, BMI) with percentile curves. Downloads official WHO reference data on demand. Use when users ask about child growth tracking, percentiles, or want growth charts for their kids.--- Generate WHO Child Growth Standards charts with percentile curves and child data overlay. ## Features - **Height-for-age** (0-19 years) - **Weight-for-age** (0-10 years) - **BMI-for-age** (0-19 years) - Supports **boys and girls** - **Downloads WHO data on demand** from cdn.who.int (cached locally) - Overlays child's actual measurements with trend line ## Examples | Height | Weight | BMI | |--------|--------|-----| | <img src="examples/anna_height.png" width="250"> | <img src="examples/anna_weight.png" width="250"> | <img src="examples/anna_bmi.png" width="250"> | ## Prerequisites Install Python dependencies: ```bash pip install pandas matplotlib scipy openpyxl ``` ## Usage ### Basic Chart Generation ```bash python3 ./scripts/growth_chart.py "Child Name" "DD.MM.YYYY" --sex F --type all ``` Arguments: - `name`: Child's name (used in chart title) - `birthdate`: Date of birth in DD.MM.YYYY format - `--sex` / `-s`: `F` (female) or `M` (male) — default: F - `--type` / `-t`: `height`, `weight`, `bmi`, or `all` — default: all - `--data` / `-d`: JSON file with measurement data - `--output` / `-o`: Output directory for charts ### With Measurement Data Create a JSON file with height/weight measurements (heights in meters, weights in kg): ```json { "heights": [ ["2024-01-15T10:00:00", 1.05] ], "weights": [ ["2024-01-15T10:00:00", 17.5] ] } ``` ```bash python3 ./scripts/growth_chart.py "Emma" "06.07.2016" --sex F --data emma_data.json --type all ``` ### Integration with Withings Combine with `withings-family` skill to fetch weight data automatically: ```bash # Get Withings weight data (assuming withings-family skill is installed) python3 ../withings-family/scripts/withings.py emma body > /tmp/withings.json # Parse and generate charts # (The growth chart script handles Withings JSON format if implemented, otherwise transform it) ``` ## Output By default, charts and cache are written to: - `<workspace>/who-growth-charts/` - `<workspace>/who-growth-charts/cache/` Where `<workspace>` is the folder that contains your `skills/` directory (the script finds it automatically; it also prefers the current working directory if it looks like a workspace, which makes symlinked workspaces behave correctly). You can override workspace discovery with `WHO_GROWTH_CHARTS_WORKSPACE=/path/to/workspace`.

Frequently asked questions