Cubby answers two questions before a raid:

Are my consumables stocked? Pick the items you want on hand and set a target count. Cubby auto-buys what you're short on at any vendor, and shuffles bag↔bank to match when you visit a banker. The on-screen tracker shows you only what's still missing.
Are my world buffs up? Tick the buffs you care about. The tracker shows the ones that aren't on you (or are about to expire). Chronoboon-stored buffs count as having the buff.

No profiles, no per-spec presets. One number per item, one tick per buff.

Items

Drag any item into the main window — or onto the bottom drop strip — to track it. Default target is 20.
Add by name: click the drop strip with an empty cursor, type the item, hit Enter. Items the client hasn't seen yet land under Not yet seen with a ? icon and graduate automatically the first time you encounter them (loot, tooltip, vendor, AH).
Edit the target inline. Changes apply immediately — including the live bank shuffle if you're at a banker.
Vendor auto-buy — at any merchant, Cubby buys exactly what you're short on. Hold Shift on open to skip.
Bank shuffle — at the bank, withdraws and stashes so each item ends at its target. Subset-sum stack picker reaches the target exactly when stack arithmetic allows. Hold Shift on open to skip.
Live progress bar while the bank shuffle runs.
Only-missing filter to collapse the list to just the items below target.

Buffs

One row per applicable world buff (Warchief's, Rallying Cry, Zandalar, Songflower, Fengus', Mol'dar's, Slip'kik's, DMF). Tick the ones you want tracked.
Class hint next to each name (physical / caster) so you know which buffs apply to your role.
Required duration — the % of each buff's max duration below which it counts as about to expire (default 90%). A short buff shows on the tracker as Buff name (Nm).
Chronoboon-aware — buffs stored in your Chronoboon Displacer count as active.
Hover any row's icon for the spell tooltip.

Sits on the right edge of the screen by default; drag to move; lock or hide from the Settings tab.
Two sections — Buffs at top, Items below (grouped by category).
Click anywhere to open the main window.
Status icons: ✓ stocked, banker = bank can cover, auctioneer = even bank can't cover.

Show / hide / lock the on-screen tracker.
Disable the bank auto-shuffle entirely.
Log every bank action (debug) — copy-paste from a popup if anything goes sideways.
Tune the bank shuffle interval (ms).

Classic Era (1.15.x) — primary.
Cata Classic, Mists Classic, and Retail interface numbers are declared in the .toc; the container API uses the cross-flavour C_Container shim. Reports welcome if you hit a flavour-specific quirk.

The world-buff catalog and Chronoboon decode are adapted from JustAPoint's Buffs.lua, which mirrors KerathRaidcheck.