kicad-improvelisted

# Self-improvement loop (one tick = one slice) Repo: `$(kx root)`. Never test against real user projects (read-only soak targets only); use `tests/fixtures/`. ## Tick protocol 1. `git -C $(kx root) log --oneline | head` + read `doc/BACKLOG.md` — pick the TOP unchecked item only. 2. If the item needs domain knowledge: ONE focused forum/web sweep (kicad.info, EEVblog, Hackaday, official dev-docs — WebSearch/WebFetch are deferred tools: load via ToolSearch first); distill into the relevant SKILL.md or doc/DESIGN.md — cite the source. 3. Build the slice; test on fixtures (`python3 tests/test_roundtrip.py` plus slice-specific test); mutation-test any new verifier rule. 4. Commit (one commit per step, no Co-Authored-By trailer). 5. Feed back: update the SKILL.md that the lesson belongs to; tick the backlog box; append new discoveries as new backlog items. 6. End the tick by suggesting the user run /compact. ## Quality bar SOLID, zero-copy where sensible, no dead code, no legacy left behind; every behavior provable by a command the next tick can rerun.