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typewriter/docs/postmortems
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Postmortems

Bench + bring-up debugging write-ups: what broke, how we found the root cause, and the decisions that came out of it. One file per incident, named YYYY-MM-DD-<slug>.md. These capture why a spike stalled or a design turned — the kind of context that's expensive to reconstruct later.

Project overview: ../../README.md. Bring-up spikes: ../v0.1-mvp-technical.md.

Date Incident Status
2026-07-05 Spike 3 (SD) — card rejects CMD59 (SPI-mode CRC) Paused — awaiting a compliant microSD; wiring + firmware proven
2026-07-05 Spike 7 (git push) — ADR-004 kill-switch fired: gix can't push over HTTPS Turned — pivoted to libgit2; git mechanics proven on desktop, device build next
2026-07-11 Editor freeze — SPI-DMA OOM during a background :sync Safety net shipped (paints non-fatal); root-cause eradication specced, not yet built