About chat-tool-ui-preview
chat-tool-ui-preview is a local tool for reviewing Slack posts before an agent sends them. It renders message formatting and destination context, flags issues, and never sends messages or contacts the Slack API.
Key features
- 01Preview Markdown, mrkdwn, and Block Kit
- 02Show destination and thread context
- 03Warn about unresolved mentions and unsupported blocks
- 04Open previews in a browser
- 05Intercept Slack send calls with a Claude Code hook
- 06Provide an MCP preview tool
Use cases
- 01Review an agent's Slack post before approval
- 02Check mentions and formatting in a draft
- 03Inspect channel and thread destination context
- 04Preview messages from non-Slack sending workflows
MCP support
Its stdio MCP server exposes a `preview_message` tool that opens a preview and reports warnings and next steps. It does not send messages or query Slack.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
We haven’t collected a package or remote endpoint for this server. Follow the instructions in the project README.
Tools
Local servers expose tools only once running on your machine, and the maintainer has not provided a tool list.
Details
The maintainer has not added details yet. Check the README in the repository.
Comments
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