dahai.tang

Systems

Six of them. Each solves a problem I actually had, and each is still in use.

  1. 01Hut-trek plannerA constraint solver for alpine hut bookings, and a single-file planner that still works when the signal doesn't.7 · nights chained85 km · distance1 · full re-solvesread ↗
  2. 02News radarReworking an open-source news scorer into a three-domain morning briefing — and cutting its running cost by four fifths.160→35 · llm calls per run~30 · items recovered per run908 · lines changedread ↗
  3. 03Lebensadmin cockpitA dashboard with no backend — one standard-library generator reads four unrelated systems and writes a single static file.4 · data sources0 · third-party dependencies0 · long-running processesread ↗
  4. 04Finanz cockpitThree banking systems, two continents and three currencies, normalised into one schema — and the masking rules that make it safe to look at.3 · currencies3 · ingestion paths1,595 LOC · pipelineread ↗
  5. 05Job-search workspaceThree board clients, a drafter/reviewer loop producing typeset applications, and a cost policy for an agent workspace.3 · board clients71 files · written in prose3 · model tiersread ↗
  6. 06Memoir writerAn interview-first writing workflow with a style spec distilled from a decade of the author's own prose, and no invented details.2014–2026 · source corpus0 · invented details permitted800–2,500 · chapter lengthread ↗