Sprint 7 covers the morning: mi-UGens s.sync, the preload pointed at what gets
played, three stacked bugs in its freshness check, 198 AppleDouble deletions,
s.latency 0.3->0.2, and the wireplumber start-limit outage.

Archive entry carries nine learnings, the load-bearing ones being that pgrep
costs 53-59ms a call here while the real trick is the cheap prefilter (the regex
on every comm is WORSE than the pgrep it replaced); that case-in-a-variable does
no alternation; that start-limit-hit is this box's signature trap and retrying is
the one action that cannot work; and that a valid measurement can be silent,
because mute sits downstream of all DSP while a null sink lies.

Memory: verify-the-leg-that-breaks gains the three 2026-09-07 instances plus two
rules (ask why two numbers disagree; a tool owns the commands it prints).
rig-state records the reset-failed lesson and the BT-by-name detail.