format.md listed `wiki:` among the domain fields, between depends and
origin, and issue.py had never heard of it. The field fell into extra and
rendered with the foreign keys — sorted in after the sync fields, which
the same document forbids one line below the table. Written without
brackets it parsed as a single string, and nothing but a text editor
could set it.
Implemented rather than de-documented: page_ls.py --titles already
prints these titles, so the field was designed and only unwired.
DOMAIN_KEYS and LIST_KEYS learn it, Issue carries it, and issue_new.py
gets a repeatable --wiki flag.
Titles only, as the format says: no path, no sub_url, no lookup. The
tracker has no field for it, so it is never sent and a pull does not
bring it back — format.md now says so.
Closes#32
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>