Tu Hoang

The company behind this (Operable) disbanded at least 2 years ago. Cog is still used in the wild, but maintenance & feature development are largely carried out in silos by...

This needs integration tests added to [slack_threads_test.exs](https://github.com/operable/cog/blob/master/test/integration/slack_threads_test.exs). And once merged, an addition to Cog Book's [Cog Server Configuration](https://github.com/operable/cog-book/blob/e5878e294d30e5d4c061c8b20cd928371dadf3b1/cog-book/source/references/cog_server_configuration.rst) page.

For reference, vanstee wrote a short guide here: https://github.com/operable/cog-book/blob/e8b42e84b8e67143ec83eeb5b7ae112fe51b7bb3/src/reference/chat_adapter_interface.adoc

Do you mind pasting the content of `docker-compose.override.slack.yml` (or `s/slack/hipchat/`) with credentials retracted? There's this ENV VAR that needs being set in both the Cog and the Relay containers: `RELAY_COG_TOKEN`.

@gnep to my limited understanding, Cog needs access to docker.sock to schedule containers (a Cog chat command executes by using container). So whilst the error might have nothing to do...

+1. Please merge :-).