diff --git a/tooltip.lua b/tooltip.lua
new file mode 100644
index 0000000..131158c
--- /dev/null
+++ b/tooltip.lua
@@ -0,0 +1,67 @@
+-- Ade Alts: tooltip (recipe items show which of your alts can learn them)
+local AA = AdeAlts
+
+local PREFIX = { Pattern = 1, Recipe = 1, Plans = 1, Formula = 1, Schematic = 1, Manual = 1, Design = 1, Book = 1, Technique = 1 }
+
+function AA.EnhanceTooltip(tt)
+  if not AA.db or not AA.RIndex or tt.adeDone then return end
+  local l1 = getglobal(tt:GetName() .. "TextLeft1")
+  local txt = l1 and l1:GetText()
+  if not txt then return end
+  local _, _, pre, nm = string.find(txt, "^(%a+): (.+)$")
+  if not pre or not PREFIX[pre] then return end
+  local hits = AA.RIndex().byAny[string.lower(nm)]
+  if not hits then return end
+  tt.adeDone = true
+  local key = string.lower(nm)
+  local added = false
+  for _, h in ipairs(hits) do
+    for _, k in ipairs(AA.SortedAlts()) do
+      local ch = AA.db.chars[k]
+      local p = ch and ch.prof and ch.prof[h.prof]
+      if p then
+        if not added then
+          tt:AddLine(" ")
+          tt:AddLine("Ade Alts", 0.2, 1, 0.8)
+          added = true
+        end
+        local col = "|cff" .. AA.ClassHex(ch.class)
+        local label
+        if not p.rec then
+          label = "|cff808080" .. h.prof .. " recipes not scanned|r"
+        else
+          local has = false
+          for _, n in ipairs(p.rec) do
+            if string.lower(n) == key then has = true; break end
+          end
+          if has then
+            label = "|cff808080already known|r"
+          elseif h.c[3] > (p.r or 0) then
+            label = "|cffff6060needs " .. h.prof .. " " .. h.c[3] .. " (has " .. (p.r or 0) .. ")|r"
+          else
+            label = "|cff40ff40can learn now|r"
+          end
+        end
+        tt:AddDoubleLine(col .. ch.name .. "|r", label)
+      end
+    end
+  end
+  if added then tt:Show() end
+end
+
+local function Hook(tt)
+  if not tt then return end
+  local oldShow = tt:GetScript("OnShow")
+  tt:SetScript("OnShow", function()
+    if oldShow then oldShow() end
+    AA.EnhanceTooltip(this)
+  end)
+  local oldHide = tt:GetScript("OnHide")
+  tt:SetScript("OnHide", function()
+    this.adeDone = nil
+    if oldHide then oldHide() end
+  end)
+end
+
+Hook(GameTooltip)
+Hook(ItemRefTooltip)