memory: Zonos2 taken down on 3090 (operator-directed, for memory, temporary)

Freed ~17.4GB (3090 728MiB->18.2GB free) for co-resident chatterbox-fast
(was OOMing). Detached native process; GPU mem held by multiprocessing-fork
children that orphan to init - kill children explicitly. Restore cmd +
affected consumers (asset-engine, gateway-chat) recorded.

persistent-memory.md

@@ -130,6 +130,8 @@ _As of 2026-08-07 — heavy overnight session landed; b182 deployed and the oper
 
 ## Recent decisions
 
+- `[2026-08-07]` **Zonos2 TAKEN DOWN on the 3090 (irv-ml1) — operator-directed "for memory", TEMPORARY.** Freed ~17.4 GB (3090: 728 MiB → 18.2 GB free) so chatterbox-fast (co-resident, was OOMing on long generations) has headroom. **⚠ Restore is manual — Zonos2 :1920 was a DETACHED native process (NOT systemd/docker), reparented to init.** GPU memory was held by the `--multiprocessing-fork` CHILDREN (1966165=16.4G, 1966166=1G), which ORPHAN to init when you kill the parent — had to SIGTERM the children explicitly (killing the parent 1965942 + uv-run 1965935 alone left the 16.4G held). **RESTORE CMD** (from irv-ml1, user lkraven): `cd /home/lkraven/tts-audition/models/zonos2 && nohup uv run python -m zonos2 --model-path Zyphra/ZONOS2 --host 0.0.0.0 --port 1920 --tts-default-voices-dir ./default_voices/ --cuda-graph-max-bs 1 --num-pages 16384 --max-running-requests 2 --memory-ratio 0.3 > /tmp/zonos2.log 2>&1 &` then `docker start zonos-gateway`. **Consumers that lost Zonos:** asset-engine + gateway-chat (via LiteLLM `ext-tts` alias → zonos-gateway :8890, now stopped); ratatoskr already migrated OFF to chatterbox-fast (unaffected). Also unblocks proper drift/cap testing (OOM was blocking it). [[reference_zonos_tts_stack]]
+
 - `[2026-08-07]` **chatterbox-fast: donut voice added + full contract delivered to ratatoskr-dev (their TTS migration off Zonos).** Operator-directed. Copied `zonos-gateway/voices/Donut.wav` → chatterbox `/refs` (`/worktank/chatterbox/reference_audio/donut.wav` — the reference_audio SUBDIR is lkraven-owned so no sudo despite `/worktank` root; container globs `/refs` live → **NO restart**), exposed as `voice:"donut"` (lowercase); verified clean 7.5s synth (24kHz, RTF ~0.31). A/B booth (chatterbox vs zonos donut, same line) at `http://10.100.10.50:8090/b/donut-chatterbox/`. Answered ratatoskr's 8-question contract ask from the live gateway (`local/chatterbox-fast:v1`) + source: **NOT OpenAI-shaped** (`POST /tts`; body `text`/`voice`/`format`/`stream`, not `input`/`model`/`response_format`); **NO affect dials** (Turbo ignores cfg_weight/min_p/exaggeration — the architecture-changing answer they flagged; **Zonos stays the only fleet TTS with real emotion steering**); streaming WAV placeholder-header shape IDENTICAL to Zonos (their per-chunk Web Audio path survives); SR 24000 (Zonos 44100); server chunks arbitrary-length text internally (no client-side chunking, unlike Zonos's 71.2s cap); English-only, no language pin. **FYI-worthy (operator):** ratatoskr is moving its RP-surface TTS OFF Zonos back to chatterbox-fast → loses the live-PAD affect coupling (heavy Zonos emotion investment) — their call, trade-off flagged to them. auto-memory `reference_chatterbox_fast_repo` enriched w/ the live contract. [[reference_zonos_tts_stack]]
 
 - `[2026-08-07]` **Fleet reranker cut over: Qwen3-Reranker-0.6B → BAAI/bge-reranker-v2-m3 (Brokkr R43).** The incumbent was measured HARMING 80/90 fleet queries (no-reranker beat it 89/90 vs 56/90). R43 bake-off: the A2 control (same Qwen weights, seq-cls head) scored identical to the incumbent → proved the fault is a training-prior not the serving head → cancelled the expensive Qwen3-4B arm; A3 (bge-v2-m3) won on multilingual safety + bare-name recovery. LiteLLM `reranker` repointed incumbent→A3 :8013 (boundary 2026-08-06T17:37:48Z, config-edit + ~52s gateway restart); **R42 v13 gate PASSED first-ever** (56/90→90/90). Incumbent kept warm :8002 (rollback via `qwen3-reranker` alias), A4 fallback :8014. Full arc + rollback runbook `docs/pfi/reranker-selection-ledger.md`; commits ad2df89/2c11748/377f8a4 (unpushed). auto-memories: the earlier reranker-serving notes.