// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Undo completed steps after a failure
// Not compiled or tested in-world
// Setup: Place in a spare owned prim. Touch once to run three steps, with the third deliberately failing. Owner touch runs the local demonstration.
// Stop / restore: Disable/remove. No external requests or scene changes occur; reset clears memory.
// Notes: Compensation is not true atomic rollback. Each simulated step only prints owner chat and appends a reversible label.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT. Local owner-only protocol laboratory.
list undo;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        undo=[];
        llOwnerSay("Step1: reserve sample slot.");
        undo+=["release sample slot"];
        llOwnerSay("Step2: stage sample label.");
        undo+=["discard staged label"];
        llOwnerSay("Step3: simulated failure; compensating.");
        integer i;
        for(i=llGetListLength(undo)-1;i>=0;--i)llOwnerSay("Undo: "+llList2String(undo,i));
        undo=[];
    }
}