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+@dolphin-emu-bot, aka. irrawaddy, aka. [Dolphin Central](https://github.com/dolphin-emu/sadm/tree/master/central) is a piece of software that controls interaction between our CI system (Buildbot) and GitHub.
+
+## What does it do?
+
+* Automatically builds incoming pull requests authored by trusted developers, and rebuilds on PR updates.
+* Updates PR status based on the CI builds/tests results.
+* Show updates about GitHub activity on Dolphin's IRC channel.
+* Shows updates about (legacy) Google Code activity on Dolphin's IRC channel.
+* Provides a way for Dolphin maintainers to allow a PR author to merge their PR by themselves.
+
+## Reverse PR approval workflow
+
+One of the recent additions to @dolphin-emu-bot's features is the ability to make a PR mergeable by its author. The idea behind this feature is to reduce PR review latency by pre-allowing a PR to be merged before it's completely ready. For example, if an otherwise good PR has a typo in documentation, the repo maintainer can comment on this typo asking for a fix, and pre-allow the merge so that the PR author can merge the change themselves after the fix has been applied.
+
+Two commands can be used by Dolphin maintainers in PR comments:
+
+* `@dolphin-emu-bot allowmerge` in a comment will show a link that allows the PR author to merge their change.
+* `@dolphin-emu-bot disallowmerge` can be used to override that decision in a later comment.
+
+The last of these two commands in PR comments will determine the status of the PR (author mergeable or not). Default status is, obviously, unmergeable.
+
+## Triggering rebuilds of a PR from an untrusted developer
+
+Just use the `@dolphin-emu-bot rebuild` command in a PR comment. Be careful that the PR does not contain anything dodgy that might get executed on Dolphin's CI infrastructure.