Close this repository in favour of Umbra-Bookshelf

The three plugins tracked here are consolidated into a single Umbra Bookshelf
plugin, released from its own repository. This repository is now read-only and
retained for provenance.

CLOSED.md

@@ -0,0 +1,54 @@
+# CLOSED
+
+**This repository is archived and closed. Development continues in
+[`Umbra-Bookshelf`](https://git.mini-eq/umbragit/Umbra-Bookshelf).**
+
+Closed: 2026-10-18
+
+---
+
+## Why
+
+This repository held three separate WordPress plugins — **BD Bookshelf**,
+**BD BookShelfHelper** and **BD SimpleEmail** — that shipped the same product
+surface under three different admin menus. They were consolidated into a single
+plugin, **Umbra Bookshelf**, which now lives in its own repository.
+
+## What moved where
+
+| Was | Is now |
+|---|---|
+| `bd-bookshelf-plugin/` | `Umbra-Bookshelf/umbra-bookshelf/includes/books/` |
+| `bd-bookshelfhelper/` | `Umbra-Bookshelf/umbra-bookshelf/includes/library/` |
+| `bd-simpleemail/` | `Umbra-Bookshelf/umbra-bookshelf/includes/email/` |
+| `SPEC_BD_Bookshelf_Plugin.txt` | `Umbra-Bookshelf/umbra-bookshelf/spec/SPEC_Umbra_Bookshelf_Plugin.md` |
+| `SPEC_BD_BookHelper_Plugin.txt` | `Umbra-Bookshelf/umbra-bookshelf/spec/archive/` |
+| `bd-bookshelf/` (theme) | `Umbra-Bookshelf/theme/` — unchanged, still a separate artifact |
+
+The `v1.0.0` tag marks the final state of the consolidated plugin before the
+repository was closed.
+
+## This repository is read-only
+
+No further commits will be made. The history is preserved for provenance —
+including the original separate plugins, which are recoverable at the tags and
+commits before `dec7329`.
+
+Do not install the individual plugins from here. They were never designed to run
+together: they collide on the `bd_books` and `bd_series` tables, both register
+an admin menu, and they attach duplicate handlers to the same AJAX actions and
+cron hooks. See `Umbra-Bookshelf/umbra-bookshelf/docs/KNOWN-ISSUES.md`.
+
+## Upgrading an existing site
+
+Install **Umbra Bookshelf** from the new repository, then **deactivate** BD
+Bookshelf, BD BookShelfHelper and BD SimpleEmail in WordPress.
+
+**Deactivate, do not delete.** Deleting a plugin runs its uninstall routine,
+which drops your database tables and options. Umbra Bookshelf reads and writes
+the same table names, option keys, post meta, cron hooks and shortcodes, so
+existing data carries over untouched.
+
+The admin menu structure changed: three top-level menus became one
+**Umbra Bookshelf** menu. The full submenu map is in
+`Umbra-Bookshelf/umbra-bookshelf/spec/SPEC_Umbra_Bookshelf_Plugin.md`.