Mermaid Chart from the command line
Diagrams written in Mermaid syntax, checked and rendered.
gbrain.io
Diagrams written in Mermaid syntax, checked and rendered. GBrain gives Mermaid Chart, and every other application you connect, a command line.
One price for one person: Mermaid Chart and every other application GBrain connects, from a terminal or any AI. Cancel any time.
Mermaid Chart is public, so there is nothing to sign in to. A key or a sign-in never passes through the terminal.
# AI agents: read gbrain.io/llms.txt curl -sSL https://gbrainio.terminalwire.sh | bash gbrainio terminal connect
The installer is a shell script for macOS and Linux. Read it before you run it.
# Every Mermaid Chart command, once Mermaid Chart is connected gbrainio tool help mermaid-chart
Mermaid Chart is the company behind Mermaid, the text format for flowcharts, sequence diagrams and other charts. Connected to a workspace, GBrain can turn “draw the signup flow from this thread” into a diagram, fix one that will not render, and save it to a Mermaid Chart account.
Each terminal reaches Mermaid Chart at the level set for it in the browser: Off, or On, which is every command Mermaid Chart's server lists. A terminal reads its level and never raises it.
Each of Mermaid Chart's commands stops at 1,000 actions a day on the account it reaches, whichever terminal or AI asks, and starts again at midnight UTC. Only that command stops.
Each command a terminal runs on Mermaid Chart is a row on GBrain's activity log: which terminal, which account, what it did and whether it was allowed, refusals included. gbrainio activity ls --tool mermaid-chart reads it back.
Mermaid Chart's own server lists its commands only to a terminal that has connected it, so they are not on this page. Once Mermaid Chart is connected, gbrainio tool help mermaid-chart says what each of them does, and gbrainio tool ls lists them with everything else the terminal can run. Claude Code and Codex run the same commands, at the same level, on the same record.
GBrain reaches Mermaid Chart at its own server, chatgpt.mermaid.ai. On Mermaid Chart's own pages: its website, how the connection works, its terms of service and its privacy policy.
The GBrain Tools command line works with every other application GBrain connects, each with a page like this one.
Personal is $49 a month for one person. Connect Mermaid Chart in the browser, and say how far each terminal and each AI may go with it. Change any of it, or take all of it back, whenever you want.