diff --git a/mbchc-local.user.js b/mbchc-local.user.js
index 0f9e24b..36f6f67 100644
--- a/mbchc-local.user.js
+++ b/mbchc-local.user.js
@@ -39,6 +39,8 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
         RE_ALL_LEFT:  /^<+$/,
         RE_ALL_RIGHT: /^>+$/,
         RE_CARET: /^\^/,
+        RE_SPACES: /\s{2,}/g,
+        RE_LAST_WORD: /(^|\s)([^\s]*)$/,
         RGB_MUTE: "#6c2132",
         RGB_POLLY: "#81b1e7",
         UTC_OFFSET: new Date().getTimezoneOffset() * 60 * 1000,
@@ -128,7 +130,7 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             "polish":   {"Hands,Boots": {all: "TakeCare"}},
             "foot":     {"Head,Nose": {others: "Step"}, "Torso,Boots": {others: "MassageFeet"}, "Vulva,VulvaPiercings": {others: "MasturbateFoot"}},
             "fist":     {"Vulva,Butt": {all: "MasturbateFist"}},
-            "fuck":     {"Mouth,Vulva,Butt": {others: "PenetrateSlow"}},
+            "fuck":     {"Mouth,Vulva,Butt": {others: "PenetrateSlow"}}, //peg?
             "pound":    {"Mouth,Vulva,Butt": {others: "PenetrateFast"}},
             "tongue":   {"Vulva,VulvaPiercings": {others: "MasturbateTongue"}},
             "finger":   {"Breast,Butt,Vulva,VulvaPiercings": {all: "MasturbateHand"}},
@@ -152,11 +154,6 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             "ItemEars":           ["ear", "ears", "earlobe", "earlobes"],
             "ItemHead":           ["head", "face", "hair", "eyes", "forehead"],
         },
-        COMMANDS: [
-            { Tag: "mbchc", Description: ": Utility functions (\"/mbchc\" for help)", Action: (argline, cmdline, args) => window.MBCHC.command_mbchc(argline, cmdline, args) },
-            { Tag: "activity", Description: "[Message]: Send a custom activity (or \"@@Message\", or \"@Message\" as yourself)", Action: (argline, cmdline, args) => window.MBCHC.command_activity(argline, cmdline, args) },
-            { Tag: "do", Description: ": Do an activity, as if clicked on its button (\"/do\" for help)", Action: (argline, cmdline, args) => window.MBCHC.command_do(argline, cmdline, args) },
-        ],
         SUBCOMMANDS_MBCHC: {
             "versions": {desc: "show the mod versions across the room", cb: mbchc => mbchc.inform(mbchc.gather_versions().map(c => `<div><b>${c.name}</b> (${c.cid}): ${c.version}</div>`).join(""))},
             "autohack": {desc: "toggle the autohack feature", cb: mbchc => mbchc.inform(`Autohack is now ${(mbchc.AUTOHACK_ENABLED = !mbchc.AUTOHACK_ENABLED) ? "enabled" : "disabled"}`)},
@@ -214,7 +211,7 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             return(result)
         },
         bg_colour: function() { return(document.getElementById("TextAreaChatLog").dataset.colortheme.startsWith("light") ? this.RGB_POLLY : this.RGB_MUTE) },
-        inform: function(html) { window.ChatRoomSendLocal(`<div style="background:${this.bg_colour()}">${html}</div>`, 60000) },
+        inform: function(html, timeout = 60000) { window.ChatRoomSendLocal(`<div style="background:${this.bg_colour()}">${html}</div>`, timeout) },
         report: function(x) {
             this.inform(`Error: ${x.toString()}`)
             if (this.RETHROW) throw x
@@ -383,38 +380,70 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             if (!char.MBCHC_LOCAL) char.MBCHC_LOCAL = {}
             if (!char.MBCHC_LOCAL.TZ) char.MBCHC_LOCAL.TZ = this.find_timezone(char)
         },
-        command_mbchc: function(argline, cmdline, args) { try {
-            if (args.length < 1) return(this.inform(Object.entries(this.SUBCOMMANDS_MBCHC).map(([cmd, sub]) => `<div>/mbchc ${cmd} ${sub.args ? Object.keys(sub.args).join(" ") : ""}: ${sub.desc}</div>`).join("")))
+        command_mbchc: function(argline, cmdline, args) { const mbchc = window.MBCHC; try { // `this` is command object
+            if (args.length < 1) return(mbchc.inform(Object.entries(mbchc.SUBCOMMANDS_MBCHC).map(([cmd, sub]) => `<div>/mbchc ${cmd} ${sub.args ? Object.keys(sub.args).join(" ") : ""}: ${sub.desc}</div>`).join("")))
             let cmd = String(args.shift())
-            let sub = this.ensure(`unknown subcommand "${cmd}"`, () => this.SUBCOMMANDS_MBCHC[cmd])
-            sub.cb.call(this, this, args, argline, cmdline)
-        } catch (x) { this.report(x) } },
-        command_activity: function(argline, cmdline, args) { if (!this.empty(argline)) { try {
-            let message = this.normalise_message(cmdline.replace(this.RE_ACTIVITY, ''), {trim: true, dot: true, up: true})
-            this.send_activity(message)
-        } catch (x) { this.report(x) } } },
-        command_do: function(argline, cmdline, args) { try {
-            if (args.length < 1) return(this.inform("<div>Usage: /do VERB [ZONE] [TARGET]</div><div>Available verbs:</div>" + Object.keys(this.MAP_ACTIONS).join(", ") + "<div>Available zones:</div>" + Object.keys(this.DO_DATA.zones).join(", ")))
+            let sub = mbchc.ensure(`unknown subcommand "${cmd}"`, () => mbchc.SUBCOMMANDS_MBCHC[cmd])
+            sub.cb.call(mbchc, mbchc, args, argline, cmdline)
+        } catch (x) { mbchc.report(x) } },
+        command_activity: function(argline, cmdline, args) { const mbchc = window.MBCHC; if (!mbchc.empty(argline)) { try { // `this` is command object
+            let message = mbchc.normalise_message(cmdline.replace(mbchc.RE_ACTIVITY, ''), {trim: true, dot: true, up: true})
+            mbchc.send_activity(message)
+        } catch (x) { mbchc.report(x) } } },
+        command_do: function(argline, cmdline, args) { const mbchc = window.MBCHC; try { // `this` is command object
+            if (args.length < 1) return(mbchc.inform("<div>Usage: /do VERB [ZONE] [TARGET]</div><div>Available verbs:</div>" + Object.keys(mbchc.MAP_ACTIONS).join(", ") + "<div>Available zones:</div>" + Object.keys(mbchc.DO_DATA.zones).join(", ")))
             let [verb, zone, target] = args
-            if (!this.DO_DATA.verbs[verb]) throw `unknown verb "${verb}"`
-            let zones = this.DO_DATA.verbs[verb]
+            let zones = mbchc.ensure(`unknown verb "${verb}"`, () => mbchc.DO_DATA.verbs[verb])
             if (1 === Object.keys(zones).length) {
                 if (!target) target = zone
-                zone = this.MAP_ZONES[Object.keys(zones)[0]][0]
+                zone = mbchc.MAP_ZONES[Object.keys(zones)[0]][0]
             }
             if (!zone) throw "zone missing"
-            let ag = this.ensure(`unknown zone "${zone}"`, () => this.DO_DATA.zones[zone])
-            let types = this.ensure(`zone "${zone}" invalid for "${verb}"`, () => zones[ag])
+            let ag = mbchc.ensure(`unknown zone "${zone}"`, () => mbchc.DO_DATA.zones[zone])
+            let types = mbchc.ensure(`zone "${zone}" invalid for "${verb}"`, () => zones[ag])
             let char = window.Player
-            if (target && ((types.self.length < 1) || (types.others.length > 0))) char = this.target2char(target)
+            if (target && ((types.self.length < 1) || (types.others.length > 0))) char = mbchc.target2char(target)
             let type = char.IsPlayer() ? "self" : "others"
             let available = window.ActivityAllowedForGroup(char, ag)
             let toy = window.InventoryGet(window.Player, "ItemHands")
             if (toy && toy.Asset.Name === "SpankingToys") available.push(window.AssetAllActivities(char.AssetFamily).find(a => a.Name === window.InventorySpankingToysGetActivity(window.Player)))
-            let actions = this.ensure(`zone "${zone}" invalid for ("${verb}" "${type}")`, () => types[type])
-            let action = this.ensure(`invalid action (${verb} ${zone} ${target})`, () => actions.find(name => available.find(a => a.Name === name)))
-            this.run_activity(char, ag, action)
-        } catch (x) { this.report(x) } },
+            let actions = mbchc.ensure(`zone "${zone}" invalid for ("${verb}" "${type}")`, () => types[type])
+            let action = mbchc.ensure(`invalid action (${verb} ${zone} ${target})`, () => actions.find(name => available.find(a => a.Name === name)))
+            mbchc.run_activity(char, ag, action)
+        } catch (x) { mbchc.report(x) } },
+        complete_common: function() {
+            let input = document.getElementById("InputChat").value
+            return([this, input, input.replace(this.RE_SPACES, " ").split(" ")])
+        },
+        complete: function(options) {
+            const chat = document.getElementById("InputChat")
+            if (options.length < 1) {
+                // TODO: maybe signal no valid options?
+                return
+            }
+            if (options.length > 1) {
+                // TODO
+                // autocomplete to common prefix
+                // better hint: hide on input
+                // better hint: increase density
+                this.inform(options.sort().map(s => `<div>${s}</div>`).join(""), 10000)
+            } else {
+                window.ElementValue("InputChat", chat.value.replace(this.RE_LAST_WORD, `$1${options[0]} `))
+                window.ElementFocus("InputChat")
+            }
+        },
+        complete_mbchc: function(args, locase, cmdline) { const [mbchc, input, tokens] = window.MBCHC.complete_common(); // `this` is command object
+//console.debug([input, tokens])
+            if (tokens.length < 1) return
+            if (tokens.length < 2) mbchc.complete([`${mbchc.CommandsKey}${this.Tag}`])
+            if (tokens.length < 3) mbchc.complete(Object.keys(mbchc.SUBCOMMANDS_MBCHC).filter(c => c.startsWith(tokens[1]))) // complete subcommand name
+        },
+        complete_do: function(args, locase, cmdline) { const [mbchc, input, tokens] = window.MBCHC.complete_common(); // `this` is command object
+//console.debug([input, tokens])
+            if (tokens.length < 1) return
+            if (tokens.length < 2) mbchc.complete([`${mbchc.CommandsKey}${this.Tag}`])
+            if (tokens.length < 3) mbchc.complete(Object.keys(mbchc.DO_DATA.verbs).filter(c => c.startsWith(tokens[1]))) // complete verb
+        },
         loader: function() {
             if (this.remove_load_hook) {
                 this.remove_load_hook()
@@ -422,6 +451,11 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             }
             if (this.LOADED) return
             // Calculated values
+            const COMMANDS = [
+                { Tag: "mbchc", Description: ": Utility functions (\"/mbchc\" for help)", Action: this.command_mbchc, AutoComplete: this.complete_mbchc },
+                { Tag: "activity", Description: "[Message]: Send a custom activity (or \"@@Message\", or \"@Message\" as yourself)", Action: this.command_activity },
+                { Tag: "do", Description: ": Do an activity, as if clicked on its button (\"/do\" for help)", Action: this.command_do, AutoComplete: this.complete_do },
+            ]
             this.HIDE_ALL = this.HIDE_SPECIAL.concat(this.HIDE_BODY).concat(this.HIDE_CLOTHES).concat(this.HIDE_ITEMS)
             this.CommandsKey = CommandsKey /* eslint-disable-line no-undef */ // window.CommandsKey is undefined
             this.RE_ACTIVITY = RegExp(`^${this.CommandsKey}activity `)
@@ -430,7 +464,7 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             this.calculate_maps()
             this.patch_handheld()
             window.Player.MBCHC = {VERSION: this.VERSION}
-            window.CommandCombine(this.COMMANDS)
+            window.CommandCombine(COMMANDS)
             this.LOADED = true
             console.info(this.log(`loaded version ${this.VERSION}`))
         }
@@ -438,13 +472,13 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
 
     // Hooks
     window.MBCHC.sdk = window.bcModSdk.registerMod("MBCHC", window.MBCHC.VERSION)
-    window.MBCHC.sdk.hookFunction("CharacterOnlineRefresh", 0, (args, next) => {
-        let result = next(args)
-        window.MBCHC.update_char(args[0])
+    window.MBCHC.sdk.hookFunction("CharacterOnlineRefresh", 0, (nextargs, next) => {
+        let result = next(nextargs)
+        window.MBCHC.update_char(nextargs[0])
         return(result)
     })
-    window.MBCHC.sdk.hookFunction("ChatRoomMessageInvolvesPlayer", 0, (args, next) => {
-        let data = args[0]
+    window.MBCHC.sdk.hookFunction("ChatRoomMessageInvolvesPlayer", 0, (nextargs, next) => {
+        let data = nextargs[0]
         if (!data.MBCHC_ID) {
             data.MBCHC_ID = window.MBCHC.NEXT_MESSAGE
             window.MBCHC.NEXT_MESSAGE += 1
@@ -453,10 +487,10 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             if (("ServerEnter" === data.Content) && ("Action" === data.Type) && (data.Sender === window.Player.cid)) { window.MBCHC.player_enters_room() }
             if (("MBCHC" === data.Content) && ("Hidden" === data.Type)) { window.MBCHC.receive(data) }
         }
-        return(next(args))
+        return(next(nextargs))
     })
-    window.MBCHC.sdk.hookFunction("ChatRoomReceiveSuitcaseMoney", 0, (args, next) => {
-        let result = next(args)
+    window.MBCHC.sdk.hookFunction("ChatRoomReceiveSuitcaseMoney", 0, (nextargs, next) => {
+        let result = next(nextargs)
         if (window.MBCHC.AUTOHACK_ENABLED && window.MBCHC.LAST_HACKED) {
             window.CurrentCharacter = window.MBCHC.cid2char(window.MBCHC.LAST_HACKED)
             window.MBCHC.LAST_HACKED = null
@@ -464,17 +498,17 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
         }
         return(result)
     })
-    window.MBCHC.sdk.hookFunction("ChatRoomSendChat", 0, (args, next) => {
+    window.MBCHC.sdk.hookFunction("ChatRoomSendChat", 0, (nextargs, next) => {
         let input = window.ElementValue("InputChat")
         if (!input.startsWith("@@@")) {
             input = input.replace(window.MBCHC.RE_PREF_ACTIVITY, window.MBCHC.PREF_ACTIVITY)
             input = input.replace(window.MBCHC.RE_PREF_ACTIVITY_ME, `${window.MBCHC.PREF_ACTIVITY}<${window.Player.cid}:>SourceCharacter `)
         }
         window.ElementValue("InputChat", input)
-        return(next(args))
+        return(next(nextargs))
     })
-    window.MBCHC.sdk.hookFunction("ChatRoomDrawCharacterOverlay", 0, (args, next) => {
-        let [C, CharX, CharY, Zoom, Pos] = args
+    window.MBCHC.sdk.hookFunction("ChatRoomDrawCharacterOverlay", 0, (nextargs, next) => {
+        let [C, CharX, CharY, Zoom, Pos] = nextargs
         if ((window.ChatRoomHideIconState < 1) && C.MBCHC) {
             let colour = (C.MBCHC.VERSION === window.Player.MBCHC.VERSION) ? window.MBCHC.RGB_POLLY : window.MBCHC.RGB_MUTE
             window.DrawRect(CharX + 175 * Zoom, CharY, 50 * Zoom, 50 * Zoom, colour)
@@ -484,25 +518,22 @@ var bcModSdk=function(){"use strict";const o="1.0.2";function e(o){alert("Mod ER
             let text = localtime.toLocaleTimeString([], {hourCycle: "h24", hour: "2-digit"})
             window.DrawTextFit(text, CharX + 200 * Zoom, CharY + 25 * Zoom, 46 * Zoom, "white", "black")
         }
-        return(next(args))
+        return(next(nextargs))
     })
-    window.MBCHC.sdk.hookFunction("CommandAutoComplete", 0, (args, next) => {
-        return(next(args))
-    })
-    window.MBCHC.sdk.hookFunction("ElementCreateInput", 0, (args, next) => {
-        let [ID, Type, Value, MaxLength] = args
-        let result = next(args)
+    window.MBCHC.sdk.hookFunction("ElementCreateInput", 0, (nextargs, next) => {
+        let [ID, Type, Value, MaxLength] = nextargs
+        let result = next(nextargs)
         if (("bce_LayerPriority" === ID) && window.CurrentCharacter && window.CurrentCharacter.FocusGroup && window.InventoryLocked(window.CurrentCharacter, window.CurrentCharacter.FocusGroup.Name, true)) window.ElementSetAttribute(ID, "disabled", true)
         return(result)
     })
-    window.MBCHC.remove_bce_hook = window.MBCHC.sdk.hookFunction("MainRun", 0, (args, next) => {
+    window.MBCHC.remove_bce_hook = window.MBCHC.sdk.hookFunction("MainRun", 0, (nextargs, next) => {
         if (window.bce_ActivityTriggers) window.MBCHC.patch_bce()
-        return(next(args))
+        return(next(nextargs))
     })
 
     // MAIN SCREEN TURN ON
     if (window.MBCHC.need_load_hook(window.CurrentModule, window.CurrentScreen)) {
-        window.MBCHC.remove_load_hook = window.MBCHC.sdk.hookFunction("AsylumGGTSSAddItems", 0, (args, next) => {window.MBCHC.loader(); return(next(args))})
+        window.MBCHC.remove_load_hook = window.MBCHC.sdk.hookFunction("AsylumGGTSSAddItems", 0, (nextargs, next) => {window.MBCHC.loader(); return(next(nextargs))})
     } else {
         window.MBCHC.loader()
         if (("Online" === window.CurrentModule) && ("ChatRoom" === window.CurrentScreen)) {