A powerful new way to quickly build internal tools, automations, admin panels, and much more.

LAUNCH

Simplify persistance

There's no need to connect a database (although you can!) because Membrane programs run in a durable JavaScript runtime.

That's right, we transparently persist memory changes so that you don't worry about loading and storing state.

Any JavaScript object can persist indefinitely because Membrane's execution timeout is effectively

Keep long-lived values in state.
import { state } from "membrane";
state.notes = state.notes ?? []
export async function saveNote({ args }) {
  state.notes.push(args.note);
}

Auditable

The most time-consuming part of bugfixing can often be reproducing the issue in the first place. We didn't like that, so we fixed it!

In Membrane, every side-effect is first written to the program's write-ahead log and then processed. HTTP requests and responses, source code changes, queries, etc are all program side-effects.

This log gives you clear understanding plus the ability to replay history so that reproducing bugs is a walk in the park.

Membrane logs are not just text output; they are the source of truth!

The Graph

In Membrane, each program defines a graph API to expose its data and functionality to other programs. You can think of the graph as objects that can be referenced by other programs, allowing you to easily compose functionality.

In this video we showcase the graph in a quick tour of the Membrane IDE.

Showcase
FEATURES
EXAMPLES
example airtable to email
Example of a Program for sending an email when a table in an Airtable is modified.
Subscribe to table changes
Get modified fields
Send email with record details.
import { nodes, root, state } from "membrane";

export async function configure() {
  await nodes.table.changed.$subscribe(root.tableChanged);
}

export async function tableChanged(_, { event }) {
  const { fields } = await event.record.$query(`{ fields }`);
  const formattedFields = JSON.parse(fields);

  let emailBody = ["Table has been changed. Details:\n"];

  for (const fieldName in formattedFields) {
    emailBody.push(`${fieldName}: ${formattedFields[fieldName]}`);
  }

  const subject = "Important: Airtable table has been changed";
  const body = emailBody.join("\n");

  await nodes.email.send({ subject, body });
}
INSTALL
Capabilities
FEATURES
▼Durable Programs ....................................................................................................0
▼Cron Jobs and Timers ....................................................................................................
1
▼Membrane Web IDE ....................................................................................................2
▼The Graph ....................................................................................................
3
▼Graph-based Access Control ....................................................................................................4
▼Observability ....................................................................................................
5
▼Instantanous Deploys ....................................................................................................6
▼Step Debugger ....................................................................................................
7
▼Custom Exit Nodes ....................................................................................................8
▼HTTP Endpoints ....................................................................................................9
▼Open Source Drivers (APIs) ....................................................................................................10
▼Code completion ....................................................................................................
11

EXAMPLES
▼Github Action Alert ....................................................................................................0
▼SMS Reminders ....................................................................................................
1
▼Mailchimp Alerts ....................................................................................................2
▼Follow Hacker News Users ....................................................................................................3
▼Airtable changes to Email ....................................................................................................4
Example of a Program for sending an email when a table in an Airtable is modified.
Subscribe to table changes
Get modified fields
Send email with record details.
import { nodes, root, state } from "membrane";

export async function configure() {
  await nodes.table.changed.$subscribe(root.tableChanged);
}

export async function tableChanged(_, { event }) {
  const { fields } = await event.record.$query(`{ fields }`);
  const formattedFields = JSON.parse(fields);

  let emailBody = ["Table has been changed. Details:\n"];

  for (const fieldName in formattedFields) {
    emailBody.push(`${fieldName}: ${formattedFields[fieldName]}`);
  }

  const subject = "Important: Airtable table has been changed";
  const body = emailBody.join("\n");

  await nodes.email.send({ subject, body });
}
INSTALL
▼Github Commits on Discord ....................................................................................................5
▼Mailchimp to airtable ....................................................................................................6
▼Github Weekly Report ....................................................................................................7
▼Track HN Jobs in Google Sheets ....................................................................................................8
▼Twitter Bot ....................................................................................................9
▼Discord Weather Bot ....................................................................................................10
The Write-Ahead Blog

If you're curious about Membrane's architecture, Juan joined the devtools.fm podcast to talk through the nuts and bolts.


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