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wtf is ron?

cab404/ron — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2021-08-17

HaskellAudience · developerComplexity · 4/5DormantSetup · moderate

TL;DR

A Haskell implementation of RON, a format and set of data types that let multiple devices sync and merge the same data automatically, even when offline.

Mindmap

mindmap
  root((repo))
    What it does
      Replicated data sync
      Merges offline changes
      Order-independent merging
    Tech stack
      Haskell
      Hackage packages
    Use cases
      Offline-first apps
      Collaborative editors
      Peer-to-peer sync
    Audience
      Haskell developers
      App architects
    Setup
      Install via Hackage
      Use needed modules only

Code map

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Why would anyone build with this?

REASON 1

Build an offline-first note-taking app where changes made on different devices merge automatically.

REASON 2

Add real-time collaborative editing to a Haskell app, similar to Google Docs.

REASON 3

Use RON-RDT data types to design data structures that merge correctly regardless of change order.

REASON 4

Sync data between peer-to-peer devices without depending on a central server.

What's in the stack?

Haskell

How it stacks up

cab404/ronbobymicroby/boby-alga-toolkitpsibi/mime-mail
LanguageHaskellHaskellHaskell
Last pushed2021-08-172021-02-102018-04-18
MaintenanceDormantDormantDormant
Setup difficultymoderateeasyeasy
Complexity4/52/52/5
Audiencedeveloperpm founderdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 1h+

Published as separate Hackage packages, so you install only the modules you need.

Yoink these prompts

Prompt 1
Help me use this repo's RON-RDT library to build a data structure that merges correctly across devices.
Prompt 2
Show me how to add offline-first sync to a Haskell app using this repo's core RON library.
Prompt 3
Explain how RON resolves conflicting edits from two devices that were offline at the same time.
Prompt 4
Walk me through using this repo's storage library to persist replicated data locally.

Frequently asked questions

wtf is ron?

A Haskell implementation of RON, a format and set of data types that let multiple devices sync and merge the same data automatically, even when offline.

What language is ron written in?

Mainly Haskell. The stack also includes Haskell.

Is ron actively maintained?

Dormant — no commits in 2+ years (last push 2021-08-17).

How hard is ron to set up?

Setup difficulty is rated moderate, with roughly 1h+ to a first successful run.

Who is ron for?

Mainly developer.

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