Three independent pieces landing together from tonight's live-debug/build session:

1. Panic chord (task #34): holding LCXL push-buttons 73+74+91+92 together now
   flips a persistent silence toggle. These are momentary Note buttons (not
   latching CC), so a simultaneous hold is a natural chord — detected with an
   edge-triggered flip-flop in start_and_midi.scd (the only layer that sees raw
   per-button press/release state cleanly). Flips are echoed to Tidal as a new
   virtual control "^93", and to the LCXL's own LEDs via the Note-On method
   already validated in this project (reference_lcxl_led_stall memory). Tidal
   side is a plain gPanic gate in live/lib/prelude.tidal — PLN wires it into
   whichever track he's actively composing/testing, not applied globally.
   Not yet live-verified (needs a fresh boot) — tracked as task #34.

2. tools/gig_record.sh: a lean, reusable, always-on stereo-master capture,
   answering "I want to always record all play, compressed." Auto-resolves
   whatever the current default PipeWire sink is at start time (so it follows
   the rig from onboard SOF SoundWire onto the UMC202HD arriving tomorrow with
   zero config changes) and encodes to Opus at 160kbps in hourly segments
   (~72MB/hr — 188GB free buys thousands of hours). start/stop/status/slice
   subcommands; slice does a fast stream-copy excerpt for quick auditioning or
   feeding into Slopmotion once that's available. Smoke-tested end to end
   (start, 8s live capture, ffprobe-verified valid opus, stop) before wiring
   into anything. NOT yet wired into gig-up.sh's auto-launch — PLN wants
   silent-by-default on every boot; that wiring is the next step.

3. Local disk freed from 28GB (98%) to 188GB (81%) free. Root-caused why the
   session had crept there: the 436GB Ardour "Tidal Multi" session (deprecated
   in favor of the lean "Tidal Live" the gig now boots) was still sitting
   locally despite the freebox mirror already holding it byte-identical.
   Verified via fbk --dry-run (0 audiofiles needing transfer; the 1530-file,
   449,260,749,448-byte audiofiles tree matched exactly on both sides) before
   asking PLN to bless the delete — freed via `rm -rf` of audiofiles/export/
   peaks, keeping the tiny .ardour session file + midifiles as structural
   reference. (Real gain was 160GB not the naive 436GB sum — this machine's
   root is Btrfs with zstd compression, so du-reported sizes don't equal freed
   space 1:1; 188GB real free per df is still the number that matters.)

Also: visuals/slop/README.md — documented the staged first test clip
(Opal2024's 12_Mauerpark.flac, loudest 60s window at 2:53-3:53, chosen because
it's the same track lineage as ete_a_mauerpark.tidal currently being edited)
while the actual Slopmotion repo remains unlocated (org has 0 repos; asked
PLN to get the real URL from Kevin/Shipow).