diff --git a/README.md b/README.md
index 82709f9..d8bc02f 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,18 @@ Peripheral-Name gezielt uebergeben werden:
 greenhouse_inventory_debug <peripheral_name>
 ```
 
+## AE2-Pattern und Duplikate erfassen
+
+Der rein lesende ME-Pattern-Auditor nutzt die Advanced-Peripherals-ME-Bridge und
+schreibt alle vom Netzwerk angebotenen Pattern, Craftables und moegliche Duplikate
+in `me_pattern_debug.txt`. Er startet keine Crafts und veraendert keine Pattern.
+
+```lua
+delete me_pattern_debug.lua
+wget https://git.peli-server.de/Dystroyer8/ATM10_CC_Codes/raw/branch/main/me_pattern_debug.lua me_pattern_debug.lua
+me_pattern_debug
+```
+
 ### Erster Logistik-Funktionstest
 
 Nach erfolgreicher Erkennung kann der Monitor-Testcontroller installiert werden:
diff --git a/me_pattern_debug.lua b/me_pattern_debug.lua
new file mode 100644
index 0000000..db61690
--- /dev/null
+++ b/me_pattern_debug.lua
@@ -0,0 +1,170 @@
+-- ATM10 AE2 pattern audit via Advanced Peripherals ME Bridge
+-- Read-only: does not craft, export, import, cancel or modify patterns.
+
+local OUTPUT_FILE = "me_pattern_debug.txt"
+local bridgeName
+
+local function hasType(name, wanted)
+    if peripheral.hasType then return peripheral.hasType(name, wanted) end
+    return peripheral.getType(name) == wanted
+end
+
+for _, name in ipairs(peripheral.getNames()) do
+    if hasType(name, "me_bridge") then bridgeName = name break end
+end
+if not bridgeName then error("Keine ME Bridge am Computer gefunden", 0) end
+
+local function sortedKeys(value)
+    local keys = {}
+    for key in pairs(value or {}) do keys[#keys + 1] = key end
+    table.sort(keys, function(a, b) return tostring(a) < tostring(b) end)
+    return keys
+end
+
+local function serialize(value, depth, seen)
+    depth, seen = depth or 0, seen or {}
+    local kind = type(value)
+    if kind == "string" then return string.format("%q", value) end
+    if kind ~= "table" then return tostring(value) end
+    if seen[value] then return "<cycle>" end
+    if depth >= 12 then return "<max-depth>" end
+    seen[value] = true
+    local parts = { "{" }
+    for _, key in ipairs(sortedKeys(value)) do
+        parts[#parts + 1] = string.rep("  ", depth + 1)
+            .. "[" .. serialize(key, depth + 1, seen) .. "] = "
+            .. serialize(value[key], depth + 1, seen) .. ","
+    end
+    parts[#parts + 1] = string.rep("  ", depth) .. "}"
+    seen[value] = nil
+    return table.concat(parts, "\n")
+end
+
+local function compact(value, seen)
+    local kind = type(value)
+    if kind == "string" then return string.format("%q", value) end
+    if kind ~= "table" then return tostring(value) end
+    seen = seen or {}
+    if seen[value] then return "<cycle>" end
+    seen[value] = true
+    local parts = {}
+    for _, key in ipairs(sortedKeys(value)) do
+        parts[#parts + 1] = "[" .. compact(key, seen) .. "]=" .. compact(value[key], seen)
+    end
+    seen[value] = nil
+    return "{" .. table.concat(parts, ",") .. "}"
+end
+
+local function callRead(method, ...)
+    local result = table.pack(pcall(peripheral.call, bridgeName, method, ...))
+    if not result[1] then return false, tostring(result[2]) end
+    if result.n == 2 then return true, result[2] end
+    local values = { n = result.n - 1 }
+    for index = 2, result.n do values[index - 1] = result[index] end
+    return true, values
+end
+
+local function listValues(value)
+    local result = {}
+    if type(value) ~= "table" then return result end
+    for key, entry in pairs(value) do
+        if key ~= "n" and type(entry) == "table" then result[#result + 1] = entry end
+    end
+    return result
+end
+
+local function recipeSide(pattern, names)
+    for _, name in ipairs(names) do
+        if pattern[name] ~= nil then return pattern[name] end
+    end
+end
+
+local function fingerprint(pattern)
+    local inputs = recipeSide(pattern, { "inputs", "input", "ingredients" })
+    local outputs = recipeSide(pattern, { "outputs", "output", "results", "result" })
+    if inputs ~= nil or outputs ~= nil then
+        return "IN=" .. compact(inputs) .. "|OUT=" .. compact(outputs)
+    end
+    return compact(pattern)
+end
+
+local lines = {}
+local function emit(value) lines[#lines + 1] = tostring(value) end
+
+emit("ATM10 AE2 PATTERN DEBUG")
+emit("Computer ID: " .. tostring(os.getComputerID()))
+emit("Computer label: " .. tostring(os.getComputerLabel() or "<not set>"))
+emit("ME Bridge: " .. bridgeName)
+local okOnline, online = callRead("isConnected")
+emit("Connected: " .. (okOnline and tostring(online) or ("ERROR: " .. tostring(online))))
+
+local okPatterns, rawPatterns = callRead("getPatterns")
+if not okPatterns then okPatterns, rawPatterns = callRead("getPatterns", {}) end
+if not okPatterns then error("getPatterns fehlgeschlagen: " .. tostring(rawPatterns), 0) end
+
+local patterns = listValues(rawPatterns)
+emit("Pattern records: " .. tostring(#patterns))
+local groups = {}
+for index, pattern in ipairs(patterns) do
+    local key = fingerprint(pattern)
+    groups[key] = groups[key] or {}
+    groups[key][#groups[key] + 1] = index
+end
+local duplicates = {}
+for key, indexes in pairs(groups) do
+    if #indexes > 1 then duplicates[#duplicates + 1] = { key = key, indexes = indexes } end
+end
+table.sort(duplicates, function(a, b)
+    if #a.indexes == #b.indexes then return a.key < b.key end
+    return #a.indexes > #b.indexes
+end)
+
+emit("Duplicate candidate groups: " .. tostring(#duplicates))
+emit("")
+emit("DUPLICATE CANDIDATES")
+emit(string.rep("=", 72))
+if #duplicates == 0 then
+    emit("No duplicates detected from the exposed pattern schema.")
+else
+    for groupIndex, group in ipairs(duplicates) do
+        emit("")
+        emit("GROUP " .. groupIndex .. " | copies=" .. #group.indexes
+            .. " | pattern indexes=" .. table.concat(group.indexes, ", "))
+        emit(group.key)
+    end
+end
+
+emit("")
+emit("RAW GETPATTERNS RESULT")
+emit(string.rep("=", 72))
+emit(serialize(rawPatterns))
+local okCraftable, craftable = callRead("getCraftableItems")
+emit("")
+emit("RAW GETCRAFTABLEITEMS RESULT")
+emit(string.rep("=", 72))
+emit(okCraftable and serialize(craftable) or ("ERROR: " .. tostring(craftable)))
+
+emit("")
+emit("CONNECTED PERIPHERALS")
+emit(string.rep("=", 72))
+local peripheralNames = peripheral.getNames()
+table.sort(peripheralNames)
+for _, name in ipairs(peripheralNames) do
+    local types = table.pack(peripheral.getType(name))
+    local typeNames = {}
+    for index = 1, types.n do
+        if types[index] ~= nil then typeNames[#typeNames + 1] = tostring(types[index]) end
+    end
+    emit(name .. " | " .. table.concat(typeNames, ", "))
+end
+
+local file = assert(fs.open(OUTPUT_FILE, "w"))
+file.write(table.concat(lines, "\n"))
+file.write("\n")
+file.close()
+
+print("ME Pattern Audit abgeschlossen.")
+print("Pattern-Datensaetze: " .. tostring(#patterns))
+print("Duplikat-Gruppen: " .. tostring(#duplicates))
+print("Erstellt: " .. OUTPUT_FILE)
+print("Bitte danach Codex 'fertig' schreiben.")