EMI Tree Tabs

Track more than one EMI recipe tree at a time, and get a crafting list that spans all of them.

Minecraft 1.20.1 · Forge and Fabric · requires EMI 1.1+ · client-side only

Modrinth · CurseForge · Releases

EMI keeps exactly one crafting tree in memory, so opening a second one silently throws away the first. This mod keeps a list of them and swaps the right one into place when you change tab — EMI's own tree screen does all the drawing and editing, so every tree behaves exactly as you expect.

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What it does

Tabs

Every tree you open becomes a tab instead of replacing the last one. Hold Shift while opening to invert that for one click.

• Live progress per tab — grey (nothing gathered), amber (partly stocked), green (you have everything), checked against your inventory on a timer
• Fork a tree with + or Ctrl+D — same goal, independent resolutions, so you can compare two routes to the same item side by side
• Rename so "Reinforced alloy for the smelter" isn't just another iron ingot icon
• Per-tab viewport — each tab keeps its own pan, zoom and batch count
• Per-tab view/craft mode — mirrors EMI's own mode button, but per tree. Only trees in crafting mode feed the crafting list, so you can keep a dozen open for reference and still see only what you're actually building
• Tabs survive restarts and resource reloads — stored as their goal recipe plus the resolutions you picked, then rebuilt

Crafting list across every tree

With more than one tree in crafting mode, EMI's crafting list draws from all of them, with duplicate recipes and materials merged into single entries.

Trees are costed against a shrinking pool rather than each getting your whole inventory. Two trees each needing 10 iron with 10 in the chest correctly report 10 still needed, instead of both declaring themselves satisfied. Reorder tabs to change which tree gets first claim.

A real second sidebar panel

The mod adds a Crafting page type to EMI's own sidebar picker, alongside Index, Craftables and Favourites. Add it as a page or a subpanel on any sidebar and the crafting list lives there, leaving your favourites alone.

The list is split into To craft, Shared materials (wanted by two or more trees) and one section per tree, with a rule between sections and titles you can click to fold.

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Controls

All on EMI's recipe tree screen.

Action	Binding
Switch tab	Left click, or Ctrl+Tab / Ctrl+Shift+Tab
Jump to tab 1–8, or last	Ctrl+1 … Ctrl+8, Ctrl+9
Reorder	Drag a tab sideways
Rename	Right click a tab, or F2
View ⇄ craft mode	Ctrl+click a tab
Close	Middle click, the ×, or Ctrl+W
Reopen closed tab	Ctrl+Shift+T
Fork the current tree	+ button, or Ctrl+D
Craft every tab at once	The ≡ button, or Ctrl+A
Open a tree already crafting	Ctrl+click a recipe's tree button
Craft every tab at once	The ≡ button, or Ctrl+A
Open a tree already crafting	Ctrl+click a recipe's tree button
Scroll the strip	Mouse wheel over the bar

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Setting up the second panel

1. In EMI's settings, add a page or subpanel to a sidebar
2. Choose Crafting from the picker

That's it. Once a Crafting panel exists the favourites sidebar stops carrying the crafting list, so it isn't shown twice.

If the page type is missing from the picker, the mod could not register it — check latest.log for a warning from emitreetabs, and it will fall back to sharing the favourites panel.

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Config

In game: Mods → EMI Tree Tabs → Config, which needs Cloth Config. That is a soft dependency — without it the mod works identically and you edit config/emitreetabs.json by hand. Edits to that file are picked up within a couple of seconds without restarting.

Key	Default	Meaning
enabled	true	Off means no tab bar and stock EMI behaviour
openInNewTab	true	New trees open as a new tab; Shift inverts per click
persistTabs	true	Save open tabs between sessions
showProgress	true	Colour tabs by inventory progress
progressIntervalMs	500	How often to recheck progress
barAtBottom	false	Move the tab strip to the bottom of the tree screen
maxTabs	32	Each tab holds a whole material graph, so this is the main lever on memory
closedTabHistory	16	How many closed tabs Ctrl+Shift+T can restore; 0 disables
keyboardShortcuts	true	Master switch for the shortcuts above
aggregateCraftingFavorites	true	Crafting list draws from every tree in crafting mode
sharedCraftingInventory	true	Trees claim materials in tab order rather than each assuming the whole inventory
groupCraftingList	true	Split the crafting list into sections
showGroupSeparators	true	Draw a rule between sections
collapsibleGroups	true	Click a section title to fold it
craftingInFavorites	true	Allow the favourites sidebar to also carry the crafting list. Ignored once a Crafting page is placed, since it would otherwise show twice
craftingPanelSide	NONE	Fallback: take over one side's Favourites panel

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Known limitations

• Section titles take a full row. EMI's sidebar is a fixed 18px grid and hover detection maps mouse position back through that same arithmetic, so giving a title only its text height would mean overriding EMI's layout in several places at once and risking clicks landing on the wrong item. The separator lines are free — they're drawn in the gap — but text is not.
• Sections align to rows, not pages. EMI paginates sidebars, so a section can straddle a page break. Padding to page boundaries would waste a lot of slots in a narrow sidebar.
• A merged tree can only hold one recipe per ingredient, which is why there is no single combined tree view. Two tabs smelting iron differently could not both be honoured in one.

Compatibility

Hooks EMI's internals rather than a public API, because EMI exposes none for crafting trees. Pinned working combination: EMI 1.1.24 · Forge 47 · MC 1.20.1. An EMI update that renames the internals listed in the source will break this, most likely as a startup error rather than a silent failure. Tested alongside EMI++ (emixx), which touches some of the same classes.

Building

Needs a JDK 17.

./gradlew build

The jar lands in build/libs/. ./gradlew runClient starts a dev client with EMI on the classpath.

Roadmap and contributing

What is planned, and what is deliberately not, is in ROADMAP.md.

Pull requests are welcome — CONTRIBUTING.md covers the build, and the couple of things about this mod that are unusual enough to trip you up (it hooks EMI internals, and there are no automated tests, so everything has to be run in game).

AI disclosure

The code in this mod was written by an AI assistant working from my direction. See AI-DISCLOSURE.md for the full statement.

Licence

MIT.