psikai/GitHub to Slack Lookup

Resolve a GitHub username to a Slack user ID on-the-fly. No mapping file required. Email-first match, name-search fallback, JSON overrides for edge cases.

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Scorecard Score: not yet scored
Maintenance Recency: Stale
License: None

Inputs

name	description	required	default
github-username	The GitHub login to resolve. Defaults to `github.actor` (the user who triggered the workflow). Override with e.g. the PR author login when running on `workflow_run` or pulling from a different event.	no	${{ github.actor }}
slack-token	Slack token with scopes `users:read` and `users:read.email`. A bot token (xoxb-) works.	yes	—
github-token	GitHub token used to read the user profile (`GET /users/{login}`). The default `secrets.GITHUB_TOKEN` is sufficient.	no	${{ github.token }}
email-domain	Optional fallback corporate email domain (e.g. `coalesce.io`). Only used when the user has no commit history in the calling repo AND no public email — in that case, the action derives `{first}.{last}@<domain>` from the GitHub `name` field and tries one more Slack lookup. Safe to omit for most repos.	no	""
overrides	Optional JSON object mapping GitHub login → Slack user ID, applied before any lookup. Example: `{"mhagglund":"U07NK4YPC02","beckjake":"U03PR4KH51R"}`. Useful for renamed accounts or name-change edge cases.	no	{}
fallback-mention-format	Template returned as `mention` output when no Slack user is found. `{login}` is substituted with the GitHub username.	no	`@{login}` _(Slack ID not found — add yourself to the org Slack or contact infra)_

Outputs

name	description
slack-id	Resolved Slack user ID (e.g. `U05UCB72807`), or empty string if no match.
found	`true` if a Slack user was matched, else `false`.
match-method	`override` \| `email-public` \| `email-derived` \| `name-search` \| `none`.
mention	`<@U123ABC>` when found (renders as a Slack mention), otherwise the rendered `fallback-mention-format`. Drop this directly into a Slack message body.