One .NET slot's review round ran two worktree-isolated reviewers at once — the
correctness lens and, on a rubric change, the Codex fallback — and took swap
from 6.8 GB to 10.8 GB in three minutes on the 16 GB host; three slots reached
load 82. review() now awaits the lenses, then the Codex runner, then its
fallback. The finisher's fix attribution is the sha range the fixer's report
head advances (head_sha is required on every report), replacing a line-set
difference over free text that listed all eleven #563 commits as fixes. The
harness gains a case that records how many lenses were still in flight when
the cross-family agents started (must be zero); moving the fallback back into
the parallel batch reddens it in both scripts. The mechanics page and the
standing prompt state the measured cap: one .NET-building slot at a time.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015QqCpYFsKgnAnx6jVwrKiV
timothyandClaude Fable 5.1
f7a0da4051