Apply planned compatibility changes in one traversal instead of copying and searching the whole token list for each game. Wire retired-Proton replacement, default/tool changes and x86-64 repointing through the batch writer.
Share entry and name updates to preserve metadata, first-match semantics and reverse insertion order. Retain the single-item path and sequential alias/non-string behavior without changing the planner, tool policy, file locks or atomic writes.
Add reference, work-budget and integration regressions, and document the host-only bulk configuration benefit.
