memory: lesson — mv into nonexistent failed/ renamed the job dir

worldtree-dev round-2 unblock: mv job complete/->failed/ assumed failed/
existed; it didn't on personal, so mv renamed job1 to 'failed' + nested job2.
Caught + reconstructed via complete/ scratch, no data loss. Lesson: verify dir
exists with [ -d ] before mv-into (empty ls is ambiguous); guard peer fs cmds
with mkdir -p.

persistent-memory.md

@@ -262,6 +262,8 @@ _147 older entries archived to archival-memory.md._
 
 ## Tried and abandoned
 
+- `[2026-08-02]` **`mv <job> complete/ → failed/` RENAMED the job to `failed` because failed/ didn't exist.** worldtree-dev's round-2 unblock command (`mv /data/state/ingestion/complete/<job> /data/state/ingestion/failed/`) assumed `failed/` existed; on PERSONAL muninn it did NOT (fresh instance — root was `active/ complete/ pending/ sources/`, no `failed/`). `mv src nonexistent/` **renames** src→nonexistent, so job1 became the `failed` dir and job2 nested inside it. Caught on post-move `ls` (failed/ held job *contents*, not two subdirs), reconstructed via complete/ as watcher-safe scratch + rebuilt `failed/` (worldtree:worldtree 755) — NO data loss. **Lessons:** (1) before `mv X into-dir/`, verify the dir EXISTS (`[ -d dir ]`) — an empty `ls dir/ 2>/dev/null` is AMBIGUOUS (missing vs empty), which was the preflight miss that let it through; (2) peer-supplied fs commands that assume a path exists need a `mkdir -p` guard before running. Container `sh` is dash — no `(` in echo strings.
+
 - `[2026-08-02]` **donut voice multi-clip reference (onyx-58 expansion) — TRIED, REVERTED.** Folded the `onyx-58` bundle's 3 Donut clips (seg101/seg110/seg148) in alongside the original seg000 → a 52.0s 4-take concat reference, hoping a longer ref → more robust speaker embedding. A pinned-seed A/B (5 pairs, varied registers, booth `donut-onyx58`) showed the **original single-clip seg000 (16.3s) sounds better** — concatenating disparate takes muddied the timbre more than the extra range helped. Reverted to seg000-alone (live + build-source). **Two durable lessons:** (1) for a faithful clone, a single clean representative take can beat a longer multi-take concat — more reference audio is NOT automatically better when the takes vary. (2) **Emotion steering pulls the output AWAY from the cloned voice fast** (operator's craft rule) — keep donut (and clones) emotion-neutral for fidelity; the gateway only enables emotion when an `emotion_*`/`preset` dial is explicitly sent, so bare `{input,voice}` calls stay pure-clone. `seg148` was diarized SPEAKER_03 but IS Donut (operator-confirmed misdiarize). onyx-58 curated bundle lives in booth `onyx-58` (24h TTL — stash to `/mnt/smithy/voice_clones/` if a future middle-ref experiment is wanted).
 
 - `[2026-08-02]` **Verifying the INDEX is not verifying GROUNDING** (#382). A `search_library` returning wing=fiction hits proves the content is *retrievable*; it does NOT prove the agent (Mimir) *trusts and uses* those hits vs. silently answering from training. I reported "Mimir read Austen back to you" off a grounded-*looking* answer; ratatoskr-dev caught that grounding was intermittent (some sessions discarded the correct hits and substituted training knowledge). Test the harder claim — are the citations note-extracted or model-knowledge? — and reading the DEPLOYED artifact beats trusting the test for "is the fix live."