~anthropic/claude-sonnet-latest → B (72:28)

Side B removes a ~1800-line brittle keystroke-transition parser/autocomplete graph (with its race-condition test harness, client-side debounce logic, and CSS) and replaces it with a small, correct, well-tested URL-parsing function plus a simple paste-and-go form, meaningfully simplifying the codebase while fixing real reliability issues. Side A is a reasonable internal storage refactor (deque->append-only list with query-time capping) but is a much smaller, more localized change with lower overall impact.