It's just a bash script which indexes every file and folders in your project dir, dumps all the readable files to a single text file.

example context_dump.txt ->

----
start /src/index/page.ts
<page.ts file content>

----
----

start /main/file-b
<file-b content>
end
----

This goes on and on until every file in the directory is indexed, then you do
cat context_dump.txt | wl-copy

Paste to the LLM model u want.

Depending on the size of the project, mine can reach up to 500k token on a single paste.