docs(media): the audiobook arm, and the music plan's applied state

One page owns the relayout facts: the new section carries the Plex-only reader,
the shape, the four commands, and the two laws a future operator would otherwise
re-litigate (never renumber a chapter; the shelf is the narrator). The music
section said its plan was NOT applied — it was applied on 2026-10-31, and a stale
line in a runbook gets believed, so it now names the journal and the rollback.

serverAppConfigs-docs/Dankserver/Media Relayout.md

@@ -1,7 +1,7 @@
 ---
 type: reference
 title: Media Relayout
-description: "Census, plan and apply the movie and TV libraries into Jellyfin format: gates, evidence chain, refusals, rollback."
+description: "Census, plan and apply the movie, TV, music and audiobook libraries into their media servers' format: gates, evidence chain, refusals, rollback."
 tags: [dankserver, media-server, jellyfin, plex, procedure]
 timestamp: 2026-10-30T00:00:00Z
 ---
@@ -12,20 +12,23 @@ The movie library on [[Entropy Volume]] arrived as release folders —
 `Some.Movie.2019.1080p.WiKiTaLx.x265-FOO/` with the video inside named after
 the release. [[Jellyfin]] matches a movie by folder and file name, so the
 release noise cost posters, extras and versions. These scripts turn that
-library into Jellyfin's own shape — the movies, the TV packs, the TV that
+library into the shape its media server reads — the movies, the TV packs, the TV
-turns up in the movie share, and the music library — and nothing else in the repo touches a media file.
+that turns up in the movie share, the music library, and the audiobooks, whose
+only reader is Plex — and nothing else in the repo touches a media file.
 
 | Script | Touches media? | Output |
 |---|---|---|
-| `scripts/media-census.py` | reads headers only | `enum`, `probed`, `plex` TSVs |
+| `scripts/media-census.py` | reads headers and the servers' own DBs, never writes | `enum`, `probed`, and one authority TSV per library |
 | `scripts/media-plan.py` | no — TSVs in, TSVs out | the plan + the exception report |
 | `scripts/media-apply.py` | **renames, never copies**; sweeps only what a run emptied | the moves, plus a journal |
 | `scripts/media-tv.py` | no — TSV out | a plan that moves TV into the TV library |
 | `scripts/media-shows.py` | no — TSV out | a plan that re-files the TV library itself |
 | `scripts/media-music.py` | no — TSV out | a plan that re-files the music library by its tags |
+| `scripts/media-audiobooks.py` | no — TSV out | a plan that re-files the audiobooks by the book Plex matched |
 
-The seams are `tests/media_relayout.bats`, `tests/media_shows.bats` and
+The seams are `tests/media_relayout.bats`, `tests/media_shows.bats`,
-`tests/media_music.bats`; the target contract is quoted from
+`tests/media_music.bats` and `tests/media_audiobooks.bats`; the movie and TV
+target contracts are quoted from
 [jellyfin.org/docs/general/server/media/movies](https://jellyfin.org/docs/general/server/media/movies)
 in `media-plan.py`'s docstring.
 
@@ -292,10 +295,69 @@ What it refuses:
   rename to `.m4a` would claim it is; **audio no provider row names parks** too,
   because unmatched audio is a tagging job, not a renaming job.
 
-The 2026-10-30 dry run files 114k tracks and parks 6.8k — mostly sidecars
+The plan was applied on 2026-10-31; its journal is
-sitting in a folder that holds two albums, plus audio no provider row names. The
+`/mnt/entropy/media-relayout-music.jsonl` and its rollback is that journal run
-plan is NOT applied: the exceptions file is the review, and it is Frank's to
+through `media-apply.py rollback --apply`. Whatever the tags could not name sits
-read.
+in `Music/_unsorted`, keeping the relative path it had, for a human to review:
+the pile is mostly sidecars in a folder holding two albums, plus audio no
+provider row names, which is a tagging job and not a renaming job.
+
+## The audiobook library's own relayout
+
+`/mnt/entropy/Audiobooks` is the one library here that [[Jellyfin]] does not read
+at all — its music scanner has no audiobook concept — while [[Plex]] indexes all
+of it as Artist → Album → Track, where the album is the BOOK, that book's single
+artist is the NARRATOR, and both were matched out of the files' own tags.
+`scripts/media-audiobooks.py` re-files the tree so the property both servers'
+book scanners assume is true —
+
+    Audiobooks/<Narrator>/<Book> (<year>)/<the file keeps its own name>
+
+Today it is not: the top level is a mix of author-named shelves and collection
+packs, and a pack's book is split across `… [Part 1]`, `… [Part 2]` folders three
+or four deep, so a scan shows three quarters of a novel.
+
+```bash
+# 1. The authority: Plex's chapter rows for this root (the DB opens read-only).
+python3 scripts/media-census.py audiobooks --root /mnt/entropy/Audiobooks \
+    --out /tmp/ab_rows.tsv
+# 2. What is on disk (stat only).
+python3 scripts/media-census.py enumerate --root /mnt/entropy/Audiobooks \
+    --out /tmp/ab_enum.tsv
+# 3. The plan.
+python3 scripts/media-audiobooks.py --root /mnt/entropy/Audiobooks \
+    --enum /tmp/ab_enum.tsv --rows /tmp/ab_rows.tsv --out /tmp/ab_plan.tsv \
+    --exceptions /tmp/ab_exceptions.txt
+# 4. Read the exceptions file FIRST. Then the same executor, journal and rollback
+#    as above, on its own journal, and refresh the Plex section as in step 5 of
+#    the movie Procedure — from inside the container, never over the host port.
+scripts/media-apply.py apply --plan /tmp/ab_plan.tsv --root /mnt/entropy \
+    --journal /mnt/entropy/media-relayout-audiobooks.jsonl --apply
+```
+
+The group is the identity Plex asserts in its own database — **(narrator, book,
+year)** — so one book arriving in four part folders becomes one folder, and a
+1965 and a 2020 recording that share a title stay two books.
+
+Two laws here are the opposite of the music arm's, and both are forced by what
+the rows actually hold:
+
++- **A chapter is never renumbered.** Most books contain chapters whose index Plex
+  does not know, so a number written into a name would be invented — and it would
+  buy nothing, because both servers order playback by the embedded track tag, not
+  by the file name. A wrong number in a name is the number a human later trusts.
+  Fix order in the tags: a Plex scan re-reads tags and never renames a file.
++- **The shelf is the narrator, not the author.** Every book has exactly one artist
+  row and it is the narrator; the author survives only inside some album titles
+  (`Kryptos by Graham McNeill`) and in no column Plex stores, so deriving it would
+  mean parsing titles where a ripper happened to write one and inventing it
+  everywhere else. One rule that always resolves beats a shelf that is half author
+  and half narrator, and the author stays visible in the folder name Plex shows.
+
+What it refuses, same list as the music arm with one addition: a video container,
+audio no chapter row names, and a loose file in a folder holding two books all
+park under `_unsorted` with the path they have today — and so does a chapter whose
+row has **no book or no narrator**, because inventing a shelf is filing it wrong.
 
 ## Laws