Rename `wiki-maintainer` to `using-wiki` (rename via git mv preserves
file history). Strip greenfield/bootstrap content out of it; add a
Prerequisites section that delegates to the new `setup-wiki` skill when
`.wiki/` is missing or non-canonical.
New `setup-wiki` skill: 6-phase procedure (sanity → discovery → plan +
confirm → backup → create/migrate → verify → report). Two modes —
greenfield (no `.wiki/`) and migrate (existing non-canon, e.g. SUMMARY.md
+ source/). Confirmation gate before any write. Templates for each canon
file (`CLAUDE.md` schema, `index.md`, `log.md`, `overview.md`,
`raw/README.md`) baked in.
`project-bootstrap` Step 3 now delegates to `setup-wiki` instead of
holding inline templates that drift from canon.
After this commit, `~/.claude/skills/wiki-maintainer/` still exists as a
stale install — the user will rm it manually after commit (c) lands the
tasks split.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>