# Is Empty

> Check if text is null, empty, or only whitespace

- Skill: `bdambrosio/is-empty` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add bdambrosio/is-empty`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bdambrosio/is-empty/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: bdambrosio (https://skillmd.com/u/bdambrosio)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/bdambrosio/is-empty

---


# Is Empty

Check whether text contains meaningful content or is effectively empty.

## Purpose

- Validate note content exists
- Enable conditional logic in plans
- Filter out empty results
- Guard against null/missing data

## Input Format

Accepts:
- Plain text string
- Note content

## Parameters

None.

## Output Format

Returns boolean:
- `True` if text is null, empty string, or only whitespace
- `False` if text contains any non-whitespace content

## Usage Examples

**Basic validation:**
```json
{"type":"is-empty","target":"$result","out":"$is_empty"}
```

**Used in conditional:**
```json
{"type":"is-empty","target":"$search_results","out":"$no_results"}
```

## Guidelines

- Treats null, empty string, whitespace-only as empty
- Newlines, tabs, spaces count as whitespace
- Any visible character makes content non-empty

## Examples

**Empty cases:**
```
null → true
"" → true
"   " → true
"\n\t  \n" → true
```

**Non-empty cases:**
```
"Hello" → false
" x " → false
"0" → false
```