feat: enhance crafting execution to support batch processing with clamping to max stack size

lib/craft.lua

@@ -168,7 +168,8 @@ end
 -- @param recipe  crafting recipe table
 -- @param ctx     context table with ops, cfg, state, log, craftTurtleName, networkModem
 -- @return success, error_message
-function craft.executeSingleCraft(recipe, ctx)
+function craft.executeSingleCraft(recipe, ctx, batches)
+    batches = batches or 1
     local ops = ctx.ops
     local cfg = ctx.cfg
     local st  = ctx.state
@@ -177,11 +178,14 @@ function craft.executeSingleCraft(recipe, ctx)
     if not ctx.networkModem    then return false, "No modem" end
     if not peripheral.isPresent(ctx.craftTurtleName) then return false, "Turtle offline" end
 
+    -- Clamp batches to 64 (max stack size per slot)
+    batches = math.min(batches, 64)
+
     local chests = ops.getChests()
     local slotMap = {}
     local reserved = {}
 
-    -- Map each grid position to a chest slot
+    -- Map each grid position to a chest slot, pulling `batches` items per slot
     for gridPos = 1, 9 do
         local itemName = recipe.grid[gridPos]
         if itemName then
@@ -195,11 +199,12 @@ function craft.executeSingleCraft(recipe, ctx)
                         for slot, si in pairs(chest.list()) do
                             local key = src.chest .. ":" .. slot
                             if si.name == itemName and not reserved[key] then
+                                local pullCount = math.min(batches, si.count)
                                 slotMap[tostring(tSlot)] = {
                                     chestName = src.chest,
                                     chestSlot = slot,
                                     itemName  = itemName,
-                                    count     = 1,
+                                    count     = pullCount,
                                 }
                                 reserved[key] = true
                                 found = true
@@ -298,16 +303,20 @@ function craft.executeChain(targetItem, count, ctx)
         ctx.state.needsRedraw = true
         ctx.state.smelterNeedsRedraw = true
 
-        for batch = 1, step.count do
-            local ok, batchErr = craft.executeSingleCraft(step.recipe, ctx)
+        -- Batch in chunks of 64 (max stack per turtle slot)
+        local remaining = step.count
+        while remaining > 0 do
+            local chunk = math.min(remaining, 64)
+            local ok, batchErr = craft.executeSingleCraft(step.recipe, ctx, chunk)
             if not ok then
                 ctx.state.activity.crafting = false
                 ctx.state.needsRedraw = true
-                ctx.log.error("CRAFT", "Chain failed at step %d batch %d: %s", i, batch, batchErr)
+                ctx.log.error("CRAFT", "Chain failed at step %d: %s", i, batchErr)
                 return false, string.format("Step %d/%d failed: %s", i, #steps, batchErr)
             end
-            -- Brief pause between batches to let turtle finish
-            if batch < step.count then os.sleep(0.3) end
+            remaining = remaining - chunk
+            -- Brief pause between chunks to let turtle finish
+            if remaining > 0 then os.sleep(0.3) end
         end
 
         ctx.log.info("CRAFT", "Step %d/%d complete: %s x%d", i, #steps, step.output, step.outputCount)