BRO-018: mergeUri slot-edit semantics a FILE context is joined as a DIR, the RESET rule eats ?ref, verb! and schemed tokens mis-peel

Now
OPEN
Sev
MED

shared/spell.js (mergeUri/compose/buildSpell) owns the typed-spell context edit; four defects break the "navigate like a directory tree" feel. All runtime-VERIFIED in the 2026-07-07 pager nav audit. Method Issues.

Input

Context

Goals

Constraints

WIP

Design decisions

TODOs

Blockers and bummers

Outcome