NeoJSON is an elegant and efficient standalone Smalltalk framework to read and write JSON converting to or from Smalltalk objects.

MIT Licensed.

A chapter in the Enterprise Pharo book is a good introduction to NeoJSON.

Go ahead and read the NeoJSON paper.

Basically, NeoJSONWriter is used to write a JSON representation of Smalltalk objects to a textual stream. Similary, NeoJSONReader is used to parse a JSON representation from a textual stream into Smalltalk objects.

http://www.json.org https://en.wikipedia.org/wiki/JSON

You can load NeoJSON using Metacello

Metacello new
  repository: 'github://svenvc/NeoJSON/repository';
  baseline: 'NeoJSON';
  load.

Gofer new
  package: 'GsUpgrader-Core';
  url: 'http://ss3.gemtalksystems.com/ss/gsUpgrader';
  load.
(Smalltalk at: #GsUpgrader) upgradeGLASS1.

Metacello new
  baseline: 'NeoJSON';
  repository: 'github://GsDevKit/NeoJSON:gs_master/repository';
  load.

You can use the following dependency from your own Metacello configuration or baseline

spec baseline: 'NeoJSON' with: [ spec repository: 'github://svenvc/NeoJSON/repository' ].