Core Concepts
Blocker mentions
How Angada @mentions the right person in Slack.
Linking GitHub to Slack
A blocker mention only pings a real person if Angada knows which Slack user corresponds to the GitHub login involved — that mapping is an Identity Link. Links are created automatically by matching a GitHub user's profile email to a Slack account, and can also be added manually. Each link keeps track of whether it came from auto-matching or a manual override.
When a mention won't ping
Two things can stop a blocker mention from pinging:
- No Identity Link exists yet for that GitHub login — the mention renders as plain GitHub-username text instead of a Slack ping, until it's linked.
- The channel has mentions turned off — some channels are set up as visibility-only (a firehose channel, for example), where the full live-updating PR card still posts but without any @mention, even for logins that do have a link.
See Link Slack identities to fix the first case.
See The mental model for how blocker mentions fit with the rest of Angada.