CLAUDE.md had grown to 3196 lines of accumulated session logs, causing
context bloat. Full session narratives (including trial-and-error and
later-corrected reasoning — quadnomicon devlog raw material) now live
as 39 individual files under .claude/session/. CLAUDE.md keeps only a
short "지금 할 일" (re-synced against question.md/pre-implementation-audit.md,
stale detail dropped) and a compact per-session summary+link table.
No design decisions changed; base/research/question.md were already
in sync with every session (verified against README.md/question.md
before archiving), so no unreflected content needed migrating first.
