I was lucky enough to get the chance to play around with sk8 when I worked at Kaleida. It was absolutely amazing, totally reflective and introspective and browsable and editable and even graphically beautiful! I just wrote about it a month ago (plate of shrimp!!!):

https://news.ycombinator.com/item?id=38406111

DonHopkins 31 days ago | parent | context | favorite | on: The Revival of Medley/Interlisp

When I worked at Kaleida (a joint venture of IBM and Apple), I had the wonderful opportunity to play around with Sk8, which was amazing! It was kind of like Dylan and ScriptX, in that it was an object oriented dialect of Lisp/Scheme with a traditional infix expression syntax. But it also had wonderful graphics and multimedia support, and cool weird shaped windows, and you could point at and explore and edit anything on the screen, a lot like HyperCard.

Q: What do you get when you cross Apple and IBM?

A: IBM!

https://en.wikipedia.org/wiki/SK8_(programming_language)

>SK8 (pronounced "skate") was a multimedia authoring environment developed in Apple's Advanced Technology Group from 1988 until 1997. It was described as "HyperCard on steroids",[1] combining a version of HyperCard's HyperTalk programming language with a modern object-oriented application platform. The project's goal was to allow creative designers to create complex, stand-alone applications. The main components of SK8 included the object system, the programming language, the graphics and components libraries, and the Project Builder, an integrated development environment.

[...]

The SK8 Multimedia Authoring Environment:

https://sk8.dreamhosters.com/sk8site/sk8.html

What is SK8?

SK8 (pronounced "skate") is a multimedia authoring environment developed in Apple's Research Laboratories. Since 1990, SK8 has been a testbed for advanced research into authoring tools and their use, as well as a tool to prototype new ideas and products. The goal of SK8 has been to enable productivity gains for software developers by reducing implementation time, facilitating rapid prototyping, supporting cross platform development and providing output to multiple runtime environments including Java. SK8 can be used to create rich media tools and titles simply and quickly. It features a fully dynamic prototype-based object system, an English-like scripting language, a general containment- and renderer-based graphic system, and a full-featured development interface. SK8 was developed using Digitool's Macintosh Common Lisp.

[...]

Sk8 Users Guide:

https://macintoshgarden.org/sites/macintoshgarden.org/files/...

Lots more information discussion of Sk8 at this link -- I'll just include the first comment, but click for more:

https://news.ycombinator.com/item?id=21846706

mikelevins on Dec 20, 2019 | parent | context | favorite | on: Interface Builder's Alternative Lisp Timeline (201...

Dylan (originally called Ralph) was basically Scheme plus a subset of CLOS. It also had some features meant to make it easier to generate small, fast artifacts--for example, it had a module system, and separately-compiled libraries, and a concept of "sealing" by which you could promise the compiler that certain things in the library would not change at runtime, so that certain kinds of optimizations could safely be performed.

Lisp and Smalltalk were indeed used by a bunch of people at Apple at that time, mostly in the Advanced Technology Group. In fact, the reason Dylan existed was that ATG was looking for a Lisp-like or Smalltalk-like language they could use for prototyping. There was a perception that anything produced by ATG would probably have to be rewritten from scratch in C, and that created a barrier to adoption. ATG wanted to be able to produce artifacts that the rest of the company would be comfortable shipping in products, without giving up the advantages of Lisp and Smalltalk. Dylan was designed to those requirements.

It was designed by Apple Cambridge, which was populated by programmers from Coral Software. Coral had created Coral Common Lisp, which later became Macintosh Common Lisp, and, still later, evolved into Clozure Common Lisp. Coral Lisp was very small for a Common Lisp implementation and fast. It had great support for the Mac Toolbox, all of which undoubtedly influenced Apple's decision to buy Coral.

Newton used the new language to write the initial OS for its novel mobile computer platform, but John Scully told them to knock it off and rewrite it in C++. There's all sorts of gossipy stuff about that sequence of events, but I don't know enough facts to tell those stories. The switch to C++ wasn't because Dylan software couldn't run in 640K, though; it ran fine. I had it running on Newton hardware every day for a couple of years.

Alan Kay was around Apple then, and seemed to be interested in pretty much everything.

Larry Tesler was in charge of the Newton group when I joined. After Scully told Larry to make the Newton team rewrite their OS in C++, Larry asked me and a couple of other Lisp hackers to "see what we could do" with Dylan on the Newton. We wrote an OS. It worked pretty well, but Apple was always going to ship the C++ OS that Scully ordered.

Larry joined our team as a programmer for the first six weeks. I found him great to work with. He had a six-week sabbatical coming when Scully ordered the rewrite, so Larry took his sabbatical with us, writing code for our experimental Lisp OS.

Apple built a bunch of other interesting stuff in Lisp, including SK8. SK8 was a radical application builder that has been described as "HyperCard on Steroids". It was much more flexible and powerful than either HyperCard or Interface Builder, but Apple never figured out what to do with it. Heck, Apple couldn't figure out what to do with HyperCard, either.