A deterministic utility to count string length for text with strict character limits using Python-based measurement.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install character-count
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install character-count using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Character Count Skill?
The Character Count skill is a portable and self-contained tool designed for developers and AI agents who need to ensure text adheres to strict character boundaries. Unlike manual estimation which can be prone to error, this Openclaw Skills utility uses a dedicated Python script to provide exact measurements of final drafts, including spaces, punctuation, and hashtags.
By integrating this skill into your workflow, you can prevent truncation and submission errors on platforms like X (Twitter), GitHub, or internal CMS systems. It acts as a deterministic local gate, ensuring that any text—from commit messages to social media replies—is validated before being finalized or posted.
Character Count Skill Use Cases
- Validating social media posts against platform limits like the 280-character X limit.
- Ensuring Git commit messages stay within recommended line lengths.
- Checking SEO meta descriptions and titles for length compliance.
- Automated drafting workflows where an AI agent must iteratively shorten text until it fits a specific constraint.
How Character Count Skill Works
- The text to be measured is passed to the skill via standard input (stdin) or as a command-line argument.
- The underlying Python script calculates the exact string length using the standard Python len() function.
- The script compares the count against a user-defined limit to determine compliance.
- A result is returned in either plain text or JSON format, indicating the character count, remaining space, and a boolean success status.
Character Count Skill Setup
To use this component of Openclaw Skills, ensure you have Python 3.8 or newer installed. You can invoke the script directly from the skill directory:
# Standard usage via stdin (recommended to preserve formatting)
printf '%s' "Your text here" | python3 scripts/character_count.py --limit 280 --json
# Alternative usage via argument
python3 scripts/character_count.py --limit 280 --json --text "Hello world"
Character Count Skill Data Schema & Taxonomy
The skill provides structured output to facilitate easy parsing by other tools or agents. When using the --json flag, the schema is as follows:
| Field | Type | Description |
|---|---|---|
chars |
Integer | The exact number of characters in the provided text. |
limit |
Integer | The maximum character threshold configured. |
remaining |
Integer | The difference between the limit and the actual count. |
ok |
Boolean | Returns true if the count is less than or equal to the limit. |
Character Count Skill Advanced Features
- Deterministic JSON output mode for seamless integration into multi-agent automation pipelines.
- Support for stdin piping using
printfto avoid the common trailing newline issues associated withecho. - Portable script design that can be referenced by full path from any working directory within the Openclaw Skills environment.
- Iterative validation support for AI-driven text rewriting and re-verification.
SKILL.md
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