# LESSON_LEARNED — mgf-vm-firecracker

> Append-only, dated log of non-obvious lessons learned working in this repo.
> Newest first. One entry per lesson. Supersede a wrong past entry with a new
> one — never rewrite history. Federation rule: **DOC-19**; template:
> `mgf-common sync-prompt` / docs/recipes/lesson-learned-md-template.md.

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## 2026-06-07 — File seeded (DOC-19 adoption wave)

- **Context:** The federation adopted **DOC-19** — every project keeps an
  append-only `LESSON_LEARNED.md` so the federation stops re-learning the same
  thing.
- **What I learned:** (none yet — seeded by the adoption wave).
- **Why it matters:** Lessons left only in chat transcripts evaporate.
- **How to apply:** When you hit a gotcha / corrected assumption / reusable
  technique in this repo, add a dated entry here. If it generalises beyond this
  repo, ALSO file a `pending-feedback/<target>.md` paper.
- **Generalizes?:** n/a (seed entry).

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