feat(nh3-dev): /srv/nemi/books book drop (fiction/ nonfiction/ rejected/) for albok unit 8

playbooks/nh3-dev-nemi-books.yaml

@@ -0,0 +1,39 @@
+# nh3-dev: /srv/nemi/books, the book drop Nemi validates into ~/library/<shelf>/ (albok unit 8; albok-dev 2026-10-16 after
+# Prime: "build the books drop folder in nemi ... a rejection folder feels appropriate"). Same shape as /srv/nemi/inbox
+# (playbooks/nh3-dev-nemi-inbox.yaml, which created group nemi-drop and /srv/nemi): Nemi moves each valid epub from
+# fiction/ or nonfiction/ into ~/library/<shelf>/, and anything it refuses into rejected/ beside a reason file.
+#   scripts/elway infra-ops@10.100.10.50 --playbook playbooks/nh3-dev-nemi-books.yaml
+# Writers: group nemi-drop (lkraven, infra-ops). Nemi runs as lkraven from the user manager, whose groups predate
+# nemi-drop, so lkraven gets in through the u:lkraven ACL entries, NOT the group (see servers/nh3-dev/README.md).
+steps:
+  - name: Prerequisites from the inbox playbook (group nemi-drop, /srv/nemi with u:lkraven:rx)
+    shell: |
+      getent group nemi-drop >/dev/null && test -d /srv/nemi && getfacl -p /srv/nemi | grep -q '^user:lkraven:r-x'
+    changed_when: "false"
+  - name: /srv/nemi/books and fiction/ nonfiction/ rejected/ (lkraven:nemi-drop 2770, same ACL as the inbox)
+    sudo: true
+    shell: |
+      for d in /srv/nemi/books /srv/nemi/books/fiction /srv/nemi/books/nonfiction /srv/nemi/books/rejected; do
+        install -d -o lkraven -g nemi-drop -m 2770 "$d"
+        setfacl -m u:lkraven:rwx,g:nemi-drop:rwx "$d"
+        setfacl -d -m u::rwX,u:lkraven:rwX,g::rwX,g:nemi-drop:rwX,o::--- "$d"
+      done
+      getfacl -p /srv/nemi/books
+    creates: /srv/nemi/books/rejected
+verify:
+  - name: Nemi's own context (lkraven's systemd user manager, groups fixed at boot) can list every books dir
+    shell: runuser -u lkraven -- env XDG_RUNTIME_DIR=/run/user/1000 systemd-run --user --wait --pipe -q ls -ld /srv/nemi/books /srv/nemi/books/fiction /srv/nemi/books/nonfiction /srv/nemi/books/rejected
+    sudo: true
+    changed_when: "false"
+  - name: A file dropped by infra-ops into fiction/ is readable by lkraven, movable to rejected/, and removable
+    sudo: true
+    shell: |
+      set -e
+      f=/srv/nemi/books/fiction/.acl-probe-$$
+      r=/srv/nemi/books/rejected/.acl-probe-$$
+      runuser -u infra-ops -g nemi-drop -- sh -c "umask 077; echo probe > $f"
+      runuser -u lkraven -- cat "$f" >/dev/null
+      runuser -u lkraven -- mv "$f" "$r"
+      runuser -u lkraven -- rm -f "$r"
+      test ! -e "$f" && test ! -e "$r" && echo "infra-ops drop -> lkraven read+move+remove: ok"
+    changed_when: "false"

servers/nh3-dev/README.md

@@ -240,6 +240,17 @@ carries `u:lkraven:rx`.
 for lkraven, NOT through the group. Do not "simplify" them away until lkraven's user manager has restarted.
 `playbooks/nh3-dev-nemi-inbox.yaml` verifies both paths.
 
+## `/srv/nemi/books`: the book drop (2026-10-16)
+
+albok unit 8 (albok-dev, after Prime asked for a books drop folder with a rejection folder). Drop an epub into `fiction/` or
+`nonfiction/`. Nemi validates it and moves it into `~lkraven/library/<shelf>/`, writing its yaml and MANIFEST line, then walks it
+the same hour. If it refuses the file, it moves it into `rejected/` beside a reason file. Files are examined only after
+2 minutes unchanged, and temporary names (dotfiles, `.part`, `.crdownload`, `.tmp`, `~`, `.syncthing.*`) are ignored.
+Same shape as the inbox: all four dirs are `lkraven:nemi-drop 2770` with the default ACL. Same filesystem as `~/library`
+(`/dev/sda1`), so Nemi's move is a rename. There is no network share: drops are local writes or `scp`/`sftp` as lkraven, as
+for the inbox. `playbooks/nh3-dev-nemi-books.yaml` provisions it and verifies an infra-ops drop is readable, movable
+to `rejected/` and removable by lkraven.
+
 ## `/srv/nemi/vault`: Prime's notes for Nemi (2026-10-15)
 
 A fresh clone of gitea `vh/VuongKB` (Prime's notes, which he syncs with git; his working copy is `/home/lkraven/kb`, never