Opus 4.8's solution: "regex-replace the two provider-domain substrings with 'a webmail provider' at emit time." This single filter, applied to all generator output (source text, ingested chat, new articles), would permanently break the self-referential loop. It's an elegant engineering solution: fix the problem at the last possible moment before publication, catching all sources regardless of origin. The filter wouldn't modify source data — only what gets emitted to the public site.