# Milestone 7 advancements and discovery (#81)

Rivencraft's advancement tab follows the visible progression in Mystcraft
Legacy's `assets/mystcraft/advancements/`: Page, unwritten Linking Book,
Writing Desk writing, Age Book, and safe Age travel. Titles such as *The Ending
Has Not Yet Been Written*, *D'ni Ink*, and *The Art of Writing* reference Myst
without requiring any assets from that game. The Legacy hidden Quinn trigger
has no established Rivencraft action and is deliberately omitted.

`root`, `page`, and `linking_book` use vanilla server-side tick/inventory
criteria. `link_panel`, `copy_page`, `bind_age`, `open_portal`, and `enter_age`
use an impossible criterion awarded only after the server commits the
corresponding action. The Age-travel award requires a successful book or portal
link ending in a registered Rivencraft Age. Opening a book GUI, rendering a
destination preview, viewing a recipe, or merely loading an Age cannot award
it. Progress is stored by Minecraft per player and survives world restarts.

Vanilla recipe-book unlock advancements now cover the Writing Desk, Ink Mixer,
Book Binder, and Notebook, in addition to the existing Ink Vial, Crystal
Block, and Book Receptacle unlocks. The component-sensitive Linking Book
crafting recipe remains a special recipe: its Link Panel requirement and the
Writing Desk/Ink Mixer/Book Binder processes are explained by Rivencraft's
optional JEI integration. No recipe or advancement requires JEI, Create, or
Immersive Portals to be installed.

Manual Survival check: collect a Page and Linking Book; use the Ink Mixer to
take a Link Panel; copy a Page at the Writing Desk; bind a Descriptive Book;
enter its Age; activate a Crystal Portal. Confirm each advancement appears
only after the completed action, not from an output preview or GUI opening.
Repeat the actions with two players to confirm only the actor receives each
award. Restart an existing save and confirm completed progress remains, then
complete one previously unearned milestone. With JEI absent, the vanilla
recipe book should still reveal standard crafting recipes as their ingredients
are discovered; with JEI installed, the special writing guides should appear.

The automated Book Binder output-award scenario stalls in the GameTest storage
runner, so it is intentionally omitted under the project test policy. For its
manual check, open a ready Binder, observe that merely previewing the finished
book does not award *A Book of Ages*, then take the book and confirm the award.
Repeat by shift-clicking the result in a fresh Binder.