Version 1.2.0 is the first open source version of cog.
Version 1.1.x of cog is internal to Standard Cognition. It's codebase is largely the same, but contained some hardcoded values specific to the company. Those have been removed to create the F/OSS version of cog.
Acknowledgements to the Standard Cognition contributors:
Pete Emerson
Manish Singh
Ryan Wright
Simonas Kazlauskas
Ryan Tilder
Aniruddha Maru
Phillip Cloud
Lukasz Walkowski