What changed: the entire implicit auto-learn path is gone from content/content.js (~60 lines deleted, zero new branches): autoLearn, the debounce timer, the key blocklist, the element allowlist, the page gate. onEditCapture is back to one job — marking what you typed so auto-fill never overwrites it.

The new invariant, with no exceptions: your profile only changes when you change it — the Profile page (autosaves) or popup Teach. Typing on any site is write-only to that page. There is no heuristic left to mistune, so the summary/salutation/country incidents are impossible by construction, not by blocklist.

Compatibility: your stored profile, mappings, and settings are untouched; reports, message protocol, and manifest are unchanged. The one behavior change: if you ever relied on silent learning, those fields now surface once in the popup's unmapped inbox and you Teach them explicitly — one tap each, then they're learned forever through the path that was always meant for it.