The console's pending, not-yet-drained queue was unbounded, so a hidden
Console page that kept receiving verbose daemon-log chunks could grow
without limit.
- Pending lines are now bounded by both a line count and a byte budget.
The oldest pending lines are dropped once either is exceeded, while
the newest line is always kept so one huge line is never lost.
- A formatted RPC result is ingested as one block under a single lock,
so lines from other producers can never interleave inside it.
The front-sequence accounting is also corrected: a pending line dropped
by the cap never entered the visible buffer, so it no longer advances
the front sequence. Only a front eviction or a clear does.
Tests: the line and byte caps keep the newest lines, a single oversized
line survives, a batch appends contiguously, and the front sequence
advances only on a front eviction or clear.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>