Per 
Item #: SCP-5171
Object Class: Euclid
Special Containment Procedures: Foundation web crawlers shall be deployed to monitor forums, bulletin board systems, and technical answer websites such as stackexchange, as well as software development web services such as github for any mention of SCP-5171. Entries related to SCP-5171 are to be removed and members who post or view these entries shall be located for interrogation and administration of Class-C amnestics. The release of Foundation malware is authorized to prevent instances of SCP-5171 from existing outside Foundation control, codenamed Kraken. Kraken shall be routinely updated to enable infection of all known operating systems compatible with currently existing versions of SCP-5171. Similar malware shall be deployed to infect DNS servers to prevent outside access to SCP-5171.
Instances of SCP-5171 shall be kept only on workstations in their testing chamber at Site 19. SCP-5171 shall only be accessed by researchers with Level 4 Clearance or higher. No fewer than two researchers may be present during testing of SCP-5171. Researchers shall be accompanied by security officers of Level 4 Clearance or higher. Upon leaving the testing chamber, personnel shall be searched for any workstation components that may contain an instance of SCP-5171. Such components include sticks of RAM, hard drives, solid state drives, USB flash drives, or any medium for transfer of files.
Description: SCP-5171 is an anomalous software integrated development environment (hereafter referred to as SCP-5171-A) and framework library (hereafter referred to as SCP-5171-B) that can produce reality-shifting effects when the code is compiled. SCP-5171-A and B can be downloaded from http://www.██████████.com. Foundation attempts to permanently disable the URL are currently underway.
Testing is still ongoing to determine the full extent of the reality-shifting effects of SCP-5171. Given the risks involved with altering reality, testing involving changes to any physical constants or laws is to be conducted only with approval from O5-6. Experimentation outside these rules is grounds for termination.
The following is a partial list of successful SCP-5171 projects:
- Creation of objects ranging in complexity from solid gold bars, to modern smartphones.
- Creation of objects ranging in size from nanomachines, to multistory buildings.
- Creation of anomalous objects including SCP-████
- Duplication of anomalous and non-anomalous objects.
- Disappearance of objects up to and including stellar-mass astronomical objects. See testing log.
- Alterations of physical law within a given volume of space.
It should be noted that while massive quantities of mass and energy can be created seemingly from nothing, the computer will consume a corresponding amount of energy while compiling unless a source for the mass-energy is specified. To avoid straining foundation resources, and blowing any more fuses, it is advised that the garbage compactors at Site-19 be selected as the source for mass-energy. Similarly, when disappearing objects, it is mandatory to designate a safe area for the energy to be disposed. There is currently no theory that predicts how much energy is required to alter physical law or to create anomalous objects; as such it is encouraged that all testing related to these activities be conducted during low electrical demand and when the garbage compactors are at maximum capacity.
The SCP-5171-B framework and library are anomalous in nature when compiled, however they do not themselves have any anomalous features while they remain as code. Given that the most simple SCP-1571 project successfully compiled was still over a billion lines of code, it is unlikely that these libraries will be independently developed. There are currently libraries for a variety of languages. Research into development of new libraries for the Foundation to use for beneficial purposes is awaiting approval from O5-█
When opened, SCP-5171-A is always similar to modern IDEs commonly used by professionals in the software development industry. It is currently unknown how SCP-5171-A updates itself even on computers that have had their ethernet and wireless internet hardware physically disabled. SCP-5171-A has support for a multitude of programming and scripting languages including but not limited to C++, Python, Java, Javascript, and VisualBasic. When a new project is opened in SCP-5171-A, it populates the editor with a default project file from SCP-5171-B. The library includes descriptions to label the effects of each class and how it can be incorporated into other code. SCP-5171-A includes a feature that warns the user that a project will cause a catastrophic reality shift. This feature was discovered January 1, 20██. Doctor Allan has since been harshly reprimanded for his carelessness.
Note: “I don’t care whether this thing has a dialogue that asks whether we want to continue with something that’s going to rip our reality to shreds! That’s no excuse for not fully vetting code. From now on, all projects need to be peer-reviewed for YK-Class Reality Restructuring potential before they can be compiled.”-Doctor Ford
Discovery: SCP-5171 was discovered November 18, 199█ on a campus PC at University of ███████ by █████ █████████ an undergraduate student in computer science. The student was using the PC to access bulletin board systems off-hours where he found the URL linking to SCP-5171. Over the course of two weeks the student experimented with SCP-5171, developing more intricate programs. The student was brought to the dean of the university on disciplinary charges after it was noted periods of high energy consumption followed his logged computer time. After being threatened with expulsion, the student turned over all his logs and programs to the university at which point Foundation plants were alerted. Containment specialists were dispatched to the university where amnestics were administered and all files were seized.
Abridged Testing Log:
Test 5171-011
Test Subject: 1.8 Solar Mass Black Hole 20,000 lightyears from Sol
Purpose for Experiment: To determine the upper limits of SCP-5171 to disappear matter. Energy was directed to an arbitrary point on the opposite side of the Milky Way Galaxy.
Result: SCP-5171-A compiled the program immediately. Foundation FTL probes using technology derived from SCP-████ confirmed the disappearance of the black hole. A similar probe confirmed the resulting energy was successfully transferred to the target point. Probe was destroyed by the blast. Hardware logs on the workstation show the CPU experienced temperatures well in excess of typical thermal load for compiling non-anomalous programs.
Notes: It seems that the CPU of the workstation consumes some of the energy when destroying objects, but the cooling systems installed weren’t equipped to handle the extra power. Suggest upgrading the cooling solutions for all workstations used for testing SCP-5171.
Test 5171-038
Test Subject: 1 Pill of SCP-500
Purpose for Experiment: Attempt to duplicate SCP-500.
Result: No combination of electrical power, mass, and sections of code from the SCP-5171-B library was successfully compiled. Of 127 attempts, there was one combination that triggered the warning of a YK-class scenario. Pill of SCP-500 was returned to its containment following the test.
Notes: It’s hard to tell whether this experiment tells more about the pills, the code, or reality itself. Such a shame we couldn’t pull it off.
Test 5171-075
Test Subject: 1 kg of deionized water, 1 kg gasoline (to be produced)
Purpose for Experiment: Attempt to study implications of thermodynamics and 5171
Result:
First Run: 1 kg of gasoline was produced, 1 kg of water was consumed. Compiling time was 6 hours. The energy consumed in compiling corresponds to the energy released from burning 1 kg of fuel.
Second Run with alternate library configuration: 1 kg of water consumed, slightly less than 1kg of gasoline produced. Program compiled instantly. CPU thermal load was similar to test 5171-011.
Notes: Some of this just doesn’t work out. Where did all the heat go when all we’re dealing with this time is a small kilogram sample, when we had the same thermal load from blowing up a goddamn black hole.
