Semiotic

Verified React chart generation: select, validate, repair, render, and inspect charts through MCP.

io.github.nteract/semiotic · Repository · Website · version 3.8.9 · 2.7k stars · listed from registry

Install

The sweep installs into a clean prefix, but this is the command a user would run:

npx semiotic

Results by platform

Linux

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
transport: on 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
Unexpected end of JSON input
Unexpected token '#', "## Performance" is not valid JSON
Unexpected token 'P', "Prefer str"... is not valid JSON

macOS

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
transport: on 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
Unexpected end of JSON input
Unexpected token '#', "## Performance" is not valid JSON
Unexpected token 'P', "Prefer str"... is not valid JSON

Windows

MCP handshake failed2026-08-16 · probed over npm

1 recorded run, oldest first.

handshake failed: MCP error -32000: Connection closed
transport: on 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
No number after minus sign in JSON at position 1 (line 1 column 2)
Unexpected end of JSON input
Unexpected token '#', "## Performance" is not valid JSON
Unexpected token 'P', "Prefer str"... is not valid JSON

Badge

Paste this into the project README to show the current result:

[![does it install](https://img.shields.io/endpoint?url=https://doesitinstall.com/badge/io.github.nteract__semiotic.json)](https://doesitinstall.com/s/io.github.nteract__semiotic.html)