All case studies.
Tracker
A self-hosted issue tracker built to replace Linear once it hit its free-tier limit. Multiple projects, each with its own key and independent issue numbering, epics and sub-issues, a Kanban board, a token-authenticated API, and a command-line client that turns a new ticket straight into a ready-to-use git branch.
ID
A passwordless single sign-on server for the apps I run. People sign in once with an emailed code or a passkey, and every app trusts the same identity, with per-app access control and one-click launching from a portal.
Hablas
A language-learning app for Spanish and Portuguese built on CEFR pacing, comprehensible input and FSRS spaced repetition, with natural pre-generated speech and a deliberately honest view of your level instead of streaks.
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