You might like Smalltalk. Programs are stored as images. An image holds the entire (fully introspectable, editable) runtime and your program. You can browse through your image with a powerful suite of built-in tools. Pieces of the image can be "filed out", or serialized to a file format.

You can see an example at 15:00 of this video - some snippets of code and then showing the System Browser.

https://www.youtube.com/watch?v=eGaKZBr0ga4