Two boundary defects on the mirrored-todo path.
1. The Agent error drain snapshotted #cursorToolResultBuffer without
awaiting entry.pending, unlike #emitCursorSplitAssistantMessage. An
async cursorOnToolResult still running when the provider errored
patched an entry the catch path had already detached, so the
pre-transform payload was persisted. A provider error is exactly when
a transform is most likely to be in flight.
2. The todo renderer interpolated mirrored provider text straight into
terminal output. A Cursor snapshot carries model-authored task
content, phase names and summary text verbatim, so a label holding
ANSI/C0 sequences rewrote the terminal on every render and replay.
sanitizeText alone is not enough - it preserves tabs, which punch
holes in bordered output - so every display path now funnels through
one forDisplay() helper: task labels, blocker notes, phase headers,
the zero-task fallback, and the streaming renderCall preview. Raw
values are untouched; content and phase name are the identity keys
the local list is looked up by and what gets persisted.
Diogo Soares Rodrigues
9088fe821b