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openclaw-md-table-formatter

v0.1.0

Published

Markdown table formatter hook for OpenClaw

Vulnerabilities

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Links

Git

Maintainers

hello.dark.devhello.dark.dev

Keywords

openclawmarkdowntableformatterhook

Readme

openclaw-md-table-formatter

npm version npm downloads License: MIT

| | Follow @JungHoonGhae on GitHub for more projects. | | :-----| :----- | | | Follow @lucas_ghae on X for updates. |

Markdown table formatter hook for OpenClaw — format tables in agent tool results automatically.

Disclaimer: This is an independent community hook. It is not affiliated with, endorsed by, or sponsored by OpenClaw. OpenClaw™ is a trademark of its respective owners.

Support

If this hook helps you, consider supporting its maintenance:

The Problem

Markdown tables from AI agents are often messy:

| Name | Age | Role |
|---|---|---|
| Alice | 30 | Engineer |
| Bob | 25 | Designer |

Columns don't align. Hard to read. Looks unprofessional in Discord/Telegram.

The Solution

This hook automatically formats markdown tables in agent tool results:

  • ✅ Proper column alignment (left, center, right)
  • ✅ Handles emojis and unicode characters
  • ✅ Preserves markdown inside inline code
  • ✅ Works with bold, italic, strikethrough
  • ✅ Invalid tables left unchanged with comment

Before

| Name | Age | Role |
|---|---|---|
| Alice | 30 | Engineer |
| Bob | 25 | Designer |

After

| Name  | Age | Role     |
|:------|:---:|:---------|
| Alice | 30  | Engineer |
| Bob   | 25  | Designer |

Installation

From npm

openclaw hooks install openclaw-md-table-formatter

From local directory

openclaw hooks install ./path/to/openclaw-md-table-formatter

Link for development

openclaw hooks install -l ./path/to/openclaw-md-table-formatter

Usage

After installation, enable the hook:

openclaw hooks enable md-table-formatter

Restart your gateway:

openclaw gateway --force

That's it! Tables in tool results will be formatted automatically.

How It Works

This hook intercepts tool_result_persist events, which fire when tool results are about to be saved to the session transcript:

| Step | Action | |------|--------| | 1. Check | Verify tool result contains text content | | 2. Parse | Extract markdown tables from text | | 3. Calculate | Determine column widths (considering markdown, emojis, unicode) | | 4. Format | Apply consistent spacing and alignment | | 5. Return | Save formatted text to transcript |

Features

| Feature | Description | |---------|-------------| | Alignment | Left (:---), center (:---:), right (---:) | | Markdown handling | Strips bold/italic/strike for width calculation | | Code preservation | Markdown inside `code` stays intact | | Unicode support | Emojis and CJK characters calculated correctly | | Error handling | Invalid tables left unchanged with comment |

Troubleshooting

| Problem | Fix | |---------|-----| | Hook not found | Run openclaw hooks install openclaw-md-table-formatter | | Tables not formatting | Run openclaw hooks enable md-table-formatter then restart gateway | | Invalid table comment | Ensure table has separator row (\|---\|) and same column count |

Requirements

  • OpenClaw >= 2026.2.0

Limitations

  • Only affects tool results, not user messages or direct agent responses
  • Tables must have a valid separator row (|---|---|)
  • All rows must have the same number of columns

Development

git clone https://github.com/JungHoonGhae/openclaw-md-table-formatter.git
cd openclaw-md-table-formatter
bun install
bun run build

Links

License

MIT - See LICENSE for details.

Contributing

Contributions are welcome! Feel free to submit a Pull Request at github.com/JungHoonGhae/openclaw-md-table-formatter.

Legal Notice

This project is provided "as is" without warranty of any kind. The use of OpenClaw hook API is subject to OpenClaw's terms of service. Users are responsible for complying with all applicable terms and conditions when using this hook.

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