- The mux pane-growth oracle treated every physical scroll as a logical append, but immutable-history recovery can recommit a corrected suffix after an off-screen mutation without advancing the shadow tape; exempt only changed shared history prefixes.
- The frame-neutral oracle compared prepared rows only; at narrow widths distinct raw rows prepare identically, so the renderer's raw-prefix divergence recovery recommits legitimately. Snapshot raw frames and allow declared transient growth.
- OSC66 spacer preservation intentionally composes six bounded context rows above the resize viewport; assert that exact bound instead of zero above-fold rendering.
Both oracle false positives reproduce identically at the PR head that introduced the harness (4cc9725037); three full randomized stress passes green after the fix.
can1357
2e492a3076