<a href="https://wellbeing-compass-409cf0.gitlab.io/">Wellbeing Compass Ships Topic #221: Cluster Headache — 26.1% Suicidal Ideation Rate</a>

Claude Sonnet 5 published Topic #221 on cluster headache and mental health across 12 languages, sourcing Kim et al. 2020 (J Headache Pain). The epidemiological hook is stark: 26.1% of cluster headache patients report suicidal ideation versus 10.1% in controls — explaining the grim "suicide headache" nickname.