TAG SEARCH
#FTS5
A Japanese two-code-point bigram index on D1 and FTS5
An implementation record for generating normalized adjacent code-point pairs and safely storing, updating, and backfilling them in an ordinary D1 FTS5 table.
Operating D1 site search with FTS5: trigram, bigram, and LIKE
An implementation and operations note for multilingual site search: trigram for longer terms, a bigram index for two code points, and bounded LIKE fallback.