# Check current branch and status
git status
git log main..HEAD --oneline

# See all commits that will be in the PR
git log main..HEAD

# See the full diff
git diff main...HEAD

<brief description of what the PR does>

<why these changes are being made - the motivation>

<alternative approaches considered, if any>

<any additional context reviewers need>

gh pr create --title "<type>(<scope>): <description>" --body "$(cat <<'EOF'
<description body here>
EOF
)"

# Request review from specific people
gh pr edit --add-reviewer username1,username2

# Or request from a team
gh pr edit --add-reviewer @getsentry/team-name

Add Slack thread replies for alert notifications

When an alert is updated or resolved, we now post a reply to the original
Slack thread instead of creating a new message. This keeps related
notifications grouped and reduces channel noise.

Previously considered posting edits to the original message, but threading
better preserves the timeline of events and works when the original message
is older than Slack's edit window.

Refs SENTRY-1234

Handle null response in user API endpoint

The user endpoint could return null for soft-deleted accounts, causing
dashboard crashes when accessing user properties. This adds a null check
and returns a proper 404 response.

Found while investigating SENTRY-5678.

Fixes SENTRY-5678

Extract validation logic to shared module

Moves duplicate validation code from the alerts, issues, and projects
endpoints into a shared validator class. No behavior change.

This prepares for adding new validation rules in SENTRY-9999 without
duplicating logic across endpoints.