Right now, a typical message is:
```
<wikibugs> Collaboration-Team-Triage (Collab-Team-Q3-Jan-Mar-2017), Edit-Review-Improvements-RC-Page, MW-1.29-release (WMF-deploy-2017-03-28_(1.29.0-wmf.18)), MW-1.29-release-notes, Patch-For-Review: Add technology so we'll be able to track usage of RC Pa... - https://phabricator.wikimedia.org/T158344#3126312
```
The bug title, which isn't even that long, gets truncated, and a lot of the tag information is not necessary here. Also, the title and link, the most important parts, are at the end.
I can think of a few possibilities:
1. Put a longer (though maybe still truncated) version of the title (and perhaps URL) at the beginning. Then, truncate the tags, and truncate the subject less.
2. Blacklist tags
2a. Global blacklist (some that are never shown) E.g. the MW-1.29-release ones are probably not necessary.
2b. Only show the tag (s) that causes the entry to show in this channel, plus maybe a whitelist of useful tags (e.g. Patch-For-Review). E.g. if the channel is listening to Collaboration-Team-Triage (Collab-Team-Q3-Jan-Mar-2017) and Edit-Review-Improvements-RC-Page, only put those (plus potentially Patch-For-Review from the global whitelist).
3. Shorten milestones (only "Collab-Team-Q3-Jan-Mar-2017", not "Collaboration-Team-Triage (Collab-Team-Q3-Jan-Mar-2017)").