diff --git a/.gitignore b/.gitignore
index 85daa02..f24b58d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,4 +20,14 @@ rad.json
 *.bclicense
 *.flf
 #Test results file
-TestResults.xml
\ No newline at end of file
+TestResults.xml
+
+# Cache
+usercache.json
+
+# Minecraft
+./
+saves/
+ops.json
+whitelist.json
+world/data/*.dat
\ No newline at end of file
diff --git a/data/mce/functions/api/cooldown/add.mcfunction b/data/mce/functions/api/cooldown/add.mcfunction
new file mode 100644
index 0000000..da69a35
--- /dev/null
+++ b/data/mce/functions/api/cooldown/add.mcfunction
@@ -0,0 +1,22 @@
+# PUBLIC API — mce:api/cooldown/add
+# MCE version: 1.1.0 (extended)
+#
+# Adds ticks to the executor's (@s) existing cooldown instead of overwriting it.
+# Unlike cooldown/set, this stacks on top of any remaining cooldown.
+# If @s has no active cooldown, this behaves like cooldown/set.
+# Compatible with Minecraft 1.19.3+
+#
+# Input:
+#   mce:cd Ticks — int, number of ticks to add (20 = 1 second)
+#
+# Usage:
+#   data modify storage mce:cd Ticks set value 40
+#   function mce:api/cooldown/add
+
+execute unless data storage mce:cd Ticks run data modify storage mce:error Last set value "mce:cd Ticks is not set — provide a tick count before calling cooldown/add"
+execute unless data storage mce:cd Ticks run data modify storage mce:error Code set value "ERR_NO_TICKS"
+execute unless data storage mce:cd Ticks run function mce:core/error/raise
+
+execute if data storage mce:cd Ticks run execute store result score #cd.add mce.cd run data get storage mce:cd Ticks
+execute if data storage mce:cd Ticks run scoreboard players operation @s mce.cd += #cd.add mce.cd
+execute if data storage mce:cd Ticks run data remove storage mce:cd Ticks
diff --git a/data/mce/functions/api/log/count.mcfunction b/data/mce/functions/api/log/count.mcfunction
new file mode 100644
index 0000000..3acc209
--- /dev/null
+++ b/data/mce/functions/api/log/count.mcfunction
@@ -0,0 +1,12 @@
+# PUBLIC API — mce:api/log/count
+# MCE version: 2.2.0
+#
+# Reads the current number of entries stored in the in-memory log.
+# Output: mce:output Log.count (int, number of entries currently held; max 64)
+# Macro-free. Compatible with Minecraft 1.19.3+
+#
+# Usage:
+#   function mce:api/log/count
+#   data get storage mce:output Log.count
+
+execute store result storage mce:output Log.count int 1 run data get storage mce:log entries
diff --git a/data/mce/functions/api/util/help.mcfunction b/data/mce/functions/api/util/help.mcfunction
index b501f80..37b538c 100644
--- a/data/mce/functions/api/util/help.mcfunction
+++ b/data/mce/functions/api/util/help.mcfunction
@@ -48,6 +48,7 @@ tellraw @s ["",{"text":" function mce:api/util/cancel","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/util/debug_toggle","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/util/log_clear","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/util/error_clear","color":"gray"}]
+tellraw @s ["",{"text":" function mce:api/util/ping (health-check, prints load status)","color":"gray"}]
 tellraw @s ["",{"text":"--- Broadcast ---","color":"yellow"}]
 tellraw @s ["",{"text":" data modify storage mce:broadcast Prefix set value \"[Tag]\"","color":"white"}]
 tellraw @s ["",{"text":" data modify storage mce:broadcast Msg set value \"<text>\"","color":"white"}]
@@ -58,7 +59,13 @@ tellraw @s ["",{"text":" function mce:api/log/info (lvl 0)","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/log/warn (lvl 1)","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/log/error (lvl 2)","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/log/show","color":"gray"}]
+tellraw @s ["",{"text":" function mce:api/log/count (writes entry count to mce:output Log.count)","color":"gray"}]
 tellraw @s ["",{"text":" function mce:api/log/clear","color":"gray"}]
+tellraw @s ["",{"text":"--- Cooldown ---","color":"yellow"}]
+tellraw @s ["",{"text":" data modify storage mce:cd Ticks set value <ticks>","color":"white"}]
+tellraw @s ["",{"text":" function mce:api/cooldown/set (overwrite)","color":"gray"}]
+tellraw @s ["",{"text":" function mce:api/cooldown/add (stack on remaining cooldown)","color":"gray"}]
+tellraw @s ["",{"text":" function mce:api/cooldown/get / check / clear","color":"gray"}]
 tellraw @s ["",{"text":"--- Error Handling ---","color":"yellow"}]
 tellraw @s ["",{"text":" data get storage mce:error Last","color":"white"}]
 tellraw @s ["",{"text":" data get storage mce:error Code","color":"white"}]
diff --git a/data/mce/functions/api/util/ping.mcfunction b/data/mce/functions/api/util/ping.mcfunction
new file mode 100644
index 0000000..483ad75
--- /dev/null
+++ b/data/mce/functions/api/util/ping.mcfunction
@@ -0,0 +1,23 @@
+# PUBLIC API — mce:api/util/ping
+# MCE version: 2.3.0 (extended)
+#
+# Health-check: confirms MCE is loaded and its scoreboard objectives respond,
+# and reports the current internal error count alongside the version string.
+# Useful for server-side monitoring or startup verification scripts.
+# Output:
+#   mce:output Ping.ok      — 1b if load status score exists and is >= 1, else 0b
+#   mce:output Ping.errors  — int, current value of mce:error Count
+# Compatible with Minecraft 1.19.3+
+#
+# Usage:
+#   function mce:api/util/ping
+#   data get storage mce:output Ping.ok
+
+data modify storage mce:output Ping.ok set value 0b
+execute if score #mce load.status matches 1.. run data modify storage mce:output Ping.ok set value 1b
+
+execute unless data storage mce:error Count run data modify storage mce:output Ping.errors set value 0
+execute if data storage mce:error Count run data modify storage mce:output Ping.errors set from storage mce:error Count
+
+execute if data storage mce:output {Ping:{ok:1b}} run tellraw @s ["",{"text":"[MCE/ping] ","color":"aqua"},{"text":"OK — engine loaded, ","color":"green"},{"storage":"mce:output","nbt":"Ping.errors","color":"yellow"},{"text":" error(s) logged.","color":"green"}]
+execute unless data storage mce:output {Ping:{ok:1b}} run tellraw @s ["",{"text":"[MCE/ping] ","color":"aqua"},{"text":"FAIL — engine not loaded (load.status missing or 0).","color":"red"}]
diff --git a/data/mce/functions/core/lib/math/clamp_calc.mcfunction b/data/mce/functions/core/lib/math/clamp_calc.mcfunction
new file mode 100644
index 0000000..a1a6afa
--- /dev/null
+++ b/data/mce/functions/core/lib/math/clamp_calc.mcfunction
@@ -0,0 +1,11 @@
+# Private: not part of MCE public API — subject to change without notice
+
+execute store result score #math.val mce.log run data get storage mce:lib_math Value
+execute store result score #math.min mce.log run data get storage mce:lib_math Min
+execute store result score #math.max mce.log run data get storage mce:lib_math Max
+
+scoreboard players operation #math.result mce.log = #math.val mce.log
+execute if score #math.result mce.log < #math.min mce.log run scoreboard players operation #math.result mce.log = #math.min mce.log
+execute if score #math.result mce.log > #math.max mce.log run scoreboard players operation #math.result mce.log = #math.max mce.log
+
+execute store result storage mce:output Math.Clamp.result int 1 run scoreboard players get #math.result mce.log
diff --git a/data/mce/functions/core/lib/math/max_calc.mcfunction b/data/mce/functions/core/lib/math/max_calc.mcfunction
new file mode 100644
index 0000000..a6d9642
--- /dev/null
+++ b/data/mce/functions/core/lib/math/max_calc.mcfunction
@@ -0,0 +1,9 @@
+# Private: not part of MCE public API — subject to change without notice
+
+execute store result score #math.a mce.log run data get storage mce:lib_math A
+execute store result score #math.b mce.log run data get storage mce:lib_math B
+
+scoreboard players operation #math.result mce.log = #math.a mce.log
+execute if score #math.b mce.log > #math.result mce.log run scoreboard players operation #math.result mce.log = #math.b mce.log
+
+execute store result storage mce:output Math.Max.result int 1 run scoreboard players get #math.result mce.log
diff --git a/data/mce/functions/core/lib/math/min_calc.mcfunction b/data/mce/functions/core/lib/math/min_calc.mcfunction
new file mode 100644
index 0000000..56bdf5c
--- /dev/null
+++ b/data/mce/functions/core/lib/math/min_calc.mcfunction
@@ -0,0 +1,9 @@
+# Private: not part of MCE public API — subject to change without notice
+
+execute store result score #math.a mce.log run data get storage mce:lib_math A
+execute store result score #math.b mce.log run data get storage mce:lib_math B
+
+scoreboard players operation #math.result mce.log = #math.a mce.log
+execute if score #math.b mce.log < #math.result mce.log run scoreboard players operation #math.result mce.log = #math.b mce.log
+
+execute store result storage mce:output Math.Min.result int 1 run scoreboard players get #math.result mce.log
diff --git a/data/mce/functions/lib/list/is_empty.mcfunction b/data/mce/functions/lib/list/is_empty.mcfunction
new file mode 100644
index 0000000..6518ac6
--- /dev/null
+++ b/data/mce/functions/lib/list/is_empty.mcfunction
@@ -0,0 +1,23 @@
+# PUBLIC API — mce:lib/list/is_empty
+# MCE version: 2.4.0 (lib)
+#
+# Checks whether a list has zero elements (or the key is missing).
+# No macros used. Compatible with Minecraft 1.20.1+.
+# Internally reuses lib/list/length.
+#
+# Input:
+#   mce:lib_list Values — list (required; may be empty [])
+#
+# Output:
+#   mce:output List.IsEmpty.result — 1b if Values has 0 elements (or is missing), else 0b
+#
+# Usage:
+#   data modify storage mce:lib_list Values set value []
+#   function mce:lib/list/is_empty
+#   data get storage mce:output List.IsEmpty.result
+
+data modify storage mce:output List.Length.result set value 0
+execute if data storage mce:lib_list Values store result storage mce:output List.Length.result int 1 run data get storage mce:lib_list Values
+
+data modify storage mce:output List.IsEmpty.result set value 0b
+execute if data storage mce:output{List:{Length:{result:0}}} run data modify storage mce:output List.IsEmpty.result set value 1b
diff --git a/data/mce/functions/lib/list/length.mcfunction b/data/mce/functions/lib/list/length.mcfunction
new file mode 100644
index 0000000..9cb88f1
--- /dev/null
+++ b/data/mce/functions/lib/list/length.mcfunction
@@ -0,0 +1,25 @@
+# PUBLIC API — mce:lib/list/length
+# MCE version: 2.4.0 (lib)
+#
+# Returns the number of elements in a list. No macros used. Uses the
+# well-known vanilla trick: `execute store result` on a `data get` of a
+# list stores its element count (not its NBT byte size) into a score.
+# Compatible with Minecraft 1.20.1+.
+#
+# Input:
+#   mce:lib_list Values — list (required; may be empty [])
+#
+# Output:
+#   mce:output List.Length.result — int, number of elements
+#
+# Usage:
+#   data modify storage mce:lib_list Values set value ["a","b","c"]
+#   function mce:lib/list/length
+#   data get storage mce:output List.Length.result
+
+execute unless data storage mce:lib_list Values run data modify storage mce:error Last set value "mce:lib_list Values is not set — provide a list before calling lib/list/length"
+execute unless data storage mce:lib_list Values run data modify storage mce:error Code set value "ERR_NO_VALUES"
+execute unless data storage mce:lib_list Values run function mce:core/error/raise
+
+data modify storage mce:output List.Length.result set value 0
+execute if data storage mce:lib_list Values store result storage mce:output List.Length.result int 1 run data get storage mce:lib_list Values
diff --git a/data/mce/functions/lib/math/clamp.mcfunction b/data/mce/functions/lib/math/clamp.mcfunction
new file mode 100644
index 0000000..924a8a8
--- /dev/null
+++ b/data/mce/functions/lib/math/clamp.mcfunction
@@ -0,0 +1,35 @@
+# PUBLIC API — mce:lib/math/clamp
+# MCE version: 2.4.0 (lib)
+#
+# Clamps an integer between Min and Max (inclusive) using pure scoreboard
+# comparisons. No macros used. Compatible with Minecraft 1.20.1+ (and much
+# earlier — scoreboard math predates macros entirely).
+#
+# Input:
+#   mce:lib_math Value — int (required)
+#   mce:lib_math Min   — int (required)
+#   mce:lib_math Max   — int (required, must be >= Min)
+#
+# Output:
+#   mce:output Math.Clamp.result — int, Value clamped into [Min, Max]
+#
+# Usage:
+#   data modify storage mce:lib_math Value set value 150
+#   data modify storage mce:lib_math Min set value 0
+#   data modify storage mce:lib_math Max set value 100
+#   function mce:lib/math/clamp
+#   data get storage mce:output Math.Clamp.result
+
+execute unless data storage mce:lib_math Value run data modify storage mce:error Last set value "mce:lib_math Value is not set — provide an int before calling lib/math/clamp"
+execute unless data storage mce:lib_math Value run data modify storage mce:error Code set value "ERR_NO_VALUE"
+execute unless data storage mce:lib_math Value run function mce:core/error/raise
+
+execute unless data storage mce:lib_math Min run data modify storage mce:error Last set value "mce:lib_math Min is not set — provide an int before calling lib/math/clamp"
+execute unless data storage mce:lib_math Min run data modify storage mce:error Code set value "ERR_NO_MIN"
+execute unless data storage mce:lib_math Min run function mce:core/error/raise
+
+execute unless data storage mce:lib_math Max run data modify storage mce:error Last set value "mce:lib_math Max is not set — provide an int before calling lib/math/clamp"
+execute unless data storage mce:lib_math Max run data modify storage mce:error Code set value "ERR_NO_MAX"
+execute unless data storage mce:lib_math Max run function mce:core/error/raise
+
+execute if data storage mce:lib_math Value if data storage mce:lib_math Min if data storage mce:lib_math Max run function mce:core/lib/math/clamp_calc
diff --git a/data/mce/functions/lib/math/max.mcfunction b/data/mce/functions/lib/math/max.mcfunction
new file mode 100644
index 0000000..fa4fa2c
--- /dev/null
+++ b/data/mce/functions/lib/math/max.mcfunction
@@ -0,0 +1,28 @@
+# PUBLIC API — mce:lib/math/max
+# MCE version: 2.4.0 (lib)
+#
+# Returns the larger of A and B. No macros used. Compatible with
+# Minecraft 1.20.1+.
+#
+# Input:
+#   mce:lib_math A — int (required)
+#   mce:lib_math B — int (required)
+#
+# Output:
+#   mce:output Math.Max.result — int, max(A, B)
+#
+# Usage:
+#   data modify storage mce:lib_math A set value 5
+#   data modify storage mce:lib_math B set value 12
+#   function mce:lib/math/max
+#   data get storage mce:output Math.Max.result
+
+execute unless data storage mce:lib_math A run data modify storage mce:error Last set value "mce:lib_math A is not set — provide an int before calling lib/math/max"
+execute unless data storage mce:lib_math A run data modify storage mce:error Code set value "ERR_NO_A"
+execute unless data storage mce:lib_math A run function mce:core/error/raise
+
+execute unless data storage mce:lib_math B run data modify storage mce:error Last set value "mce:lib_math B is not set — provide an int before calling lib/math/max"
+execute unless data storage mce:lib_math B run data modify storage mce:error Code set value "ERR_NO_B"
+execute unless data storage mce:lib_math B run function mce:core/error/raise
+
+execute if data storage mce:lib_math A if data storage mce:lib_math B run function mce:core/lib/math/max_calc
diff --git a/data/mce/functions/lib/math/min.mcfunction b/data/mce/functions/lib/math/min.mcfunction
new file mode 100644
index 0000000..6806e99
--- /dev/null
+++ b/data/mce/functions/lib/math/min.mcfunction
@@ -0,0 +1,28 @@
+# PUBLIC API — mce:lib/math/min
+# MCE version: 2.4.0 (lib)
+#
+# Returns the smaller of A and B. No macros used. Compatible with
+# Minecraft 1.20.1+.
+#
+# Input:
+#   mce:lib_math A — int (required)
+#   mce:lib_math B — int (required)
+#
+# Output:
+#   mce:output Math.Min.result — int, min(A, B)
+#
+# Usage:
+#   data modify storage mce:lib_math A set value 5
+#   data modify storage mce:lib_math B set value 12
+#   function mce:lib/math/min
+#   data get storage mce:output Math.Min.result
+
+execute unless data storage mce:lib_math A run data modify storage mce:error Last set value "mce:lib_math A is not set — provide an int before calling lib/math/min"
+execute unless data storage mce:lib_math A run data modify storage mce:error Code set value "ERR_NO_A"
+execute unless data storage mce:lib_math A run function mce:core/error/raise
+
+execute unless data storage mce:lib_math B run data modify storage mce:error Last set value "mce:lib_math B is not set — provide an int before calling lib/math/min"
+execute unless data storage mce:lib_math B run data modify storage mce:error Code set value "ERR_NO_B"
+execute unless data storage mce:lib_math B run function mce:core/error/raise
+
+execute if data storage mce:lib_math A if data storage mce:lib_math B run function mce:core/lib/math/min_calc
diff --git a/data/mce/functions/lib/string/is_empty.mcfunction b/data/mce/functions/lib/string/is_empty.mcfunction
new file mode 100644
index 0000000..2afeeac
--- /dev/null
+++ b/data/mce/functions/lib/string/is_empty.mcfunction
@@ -0,0 +1,27 @@
+# PUBLIC API — mce:lib/string/is_empty
+# MCE version: 2.4.0 (lib)
+#
+# Checks whether a string is exactly "" (empty).
+# No macros used. Compatible with Minecraft 1.20.1+.
+#
+# Input:
+#   mce:lib_string Value — string (required key; value itself may be "")
+#
+# Output:
+#   mce:output String.IsEmpty.result — 1b if Value == "", else 0b
+#   mce:output String.IsEmpty.set    — 1b if the Value key exists at all, else 0b
+#
+# Usage:
+#   data modify storage mce:lib_string Value set value ""
+#   function mce:lib/string/is_empty
+#   data get storage mce:output String.IsEmpty.result
+
+execute unless data storage mce:lib_string Value run data modify storage mce:error Last set value "mce:lib_string Value is not set — provide a (possibly empty) string before calling lib/string/is_empty"
+execute unless data storage mce:lib_string Value run data modify storage mce:error Code set value "ERR_NO_VALUE"
+execute unless data storage mce:lib_string Value run function mce:core/error/raise
+
+data modify storage mce:output String.IsEmpty.set set value 0b
+execute if data storage mce:lib_string Value run data modify storage mce:output String.IsEmpty.set set value 1b
+
+data modify storage mce:output String.IsEmpty.result set value 0b
+execute if data storage mce:lib_string{Value:""} run data modify storage mce:output String.IsEmpty.result set value 1b
diff --git a/data/mce/tags/functions/api/cooldown/add.json b/data/mce/tags/functions/api/cooldown/add.json
new file mode 100644
index 0000000..b043b10
--- /dev/null
+++ b/data/mce/tags/functions/api/cooldown/add.json
@@ -0,0 +1 @@
+{ "values": ["mce:api/cooldown/add"] }
diff --git a/data/mce/tags/functions/api/log/count.json b/data/mce/tags/functions/api/log/count.json
new file mode 100644
index 0000000..f92c2ad
--- /dev/null
+++ b/data/mce/tags/functions/api/log/count.json
@@ -0,0 +1 @@
+{ "values": ["mce:api/log/count"] }
diff --git a/data/mce/tags/functions/api/util/ping.json b/data/mce/tags/functions/api/util/ping.json
new file mode 100644
index 0000000..69ff224
--- /dev/null
+++ b/data/mce/tags/functions/api/util/ping.json
@@ -0,0 +1 @@
+{ "values": ["mce:api/util/ping"] }
diff --git a/data/mce/tags/functions/lib/list/is_empty.json b/data/mce/tags/functions/lib/list/is_empty.json
new file mode 100644
index 0000000..5ecc241
--- /dev/null
+++ b/data/mce/tags/functions/lib/list/is_empty.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/list/is_empty"] }
diff --git a/data/mce/tags/functions/lib/list/length.json b/data/mce/tags/functions/lib/list/length.json
new file mode 100644
index 0000000..a10981a
--- /dev/null
+++ b/data/mce/tags/functions/lib/list/length.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/list/length"] }
diff --git a/data/mce/tags/functions/lib/math/clamp.json b/data/mce/tags/functions/lib/math/clamp.json
new file mode 100644
index 0000000..092dcc1
--- /dev/null
+++ b/data/mce/tags/functions/lib/math/clamp.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/math/clamp"] }
diff --git a/data/mce/tags/functions/lib/math/max.json b/data/mce/tags/functions/lib/math/max.json
new file mode 100644
index 0000000..49cdc43
--- /dev/null
+++ b/data/mce/tags/functions/lib/math/max.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/math/max"] }
diff --git a/data/mce/tags/functions/lib/math/min.json b/data/mce/tags/functions/lib/math/min.json
new file mode 100644
index 0000000..e6a3a29
--- /dev/null
+++ b/data/mce/tags/functions/lib/math/min.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/math/min"] }
diff --git a/data/mce/tags/functions/lib/string/is_empty.json b/data/mce/tags/functions/lib/string/is_empty.json
new file mode 100644
index 0000000..d189eea
--- /dev/null
+++ b/data/mce/tags/functions/lib/string/is_empty.json
@@ -0,0 +1 @@
+{ "values": ["mce:lib/string/is_empty"] }