Wiki

In-repo markdown wiki under wiki/. Three triggers — pick one from the user request:

Trigger	When	Reference
init	No usable `wiki/` yet; user asks to create/generate/bootstrap the wiki	references/init-and-update.md (init path) + references/structure-and-format.md
update	`wiki/` exists; user asks to refresh/sync/update after code changes	references/init-and-update.md (update path) + references/structure-and-format.md
ask	User asks how/where/why about the repo and `wiki/` should be the primary source	references/ask.md
install	User asks to refresh wiki automatically and keep wiki up to date	references/install.md.

Hard rules

Never wipe an existing wiki/. If it exists with real content, use update (even if the user said "generate" or "rebuild"). Only init when there is no usable wiki.
Prefer small surgical edits on update. No formatting-only churn. No-op is success when nothing relevant changed.
Respect .wikiignore at repo root and all .gitignore patterns — never read excluded paths. See references/wikiignore.md.
Never read or document secrets, credentials, or .env files (.env.example placeholders are OK).