Developer Documentation

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Source Code Repository Access

OpenSimulator uses git as its source code repository. Checkout

git clone git://

See Source Code Repository for more details.

See Using_Git for more Details on installing and using GIT with

You can also browse the source code for OpenSim using a web browser.

We have Ohloh page, which takes various statistics of the OpenSimulator code base.

Submitting Patches

Please review Submitting_code_to_OpenSim

Developer Documentation

Please be aware that some of this documentation may be out of date. If this appears to be the case then please ask for more information on the mailing lists or IRC channels (details are on the Main Page).



Development Services

Client Stacks

  • Sim Throttles — Information on how OpenSim handles throttling of packets to the client.


  • Database Documentation — Information on the database schemas used in OpenSim
  • MonoSqlite — How the database model currently works.
  • LSL:PrimitiveParams — Notes on converting SL Edit GUI values and LSL PrimitiveParams to OpenSim PrimitiveBaseShape fields

File formats




  • Region module basics - The basics of how to create a region module, and where example code can be found in the OpenSim source tree.






  • Scripting_Documentation — How to use scripts and what limitations apply.
  • LSL_Status — A list of LSL-functions that are available in OpenSim.
  • OSSL — Some information about the OpenSimulator Scripting Language, and how to implement an OSSL function
  • OpenSim.Region.ScriptEngine — How the ScriptEngine looks internally.





Web Integration

Feature Proposals

Proposed projects


A good first point of contact is the OpenSim IRC, on channels #opensim / #opensim-dev / #osgrid / #opensim-scripting. The OpenSim developers hold office hours once a week in-world on Tuesdays at "Wright Plaza" on OSGrid. There is a "Test Hour" on Saturdays, also generally on "Wright Plaza". Both these weekly events are held at 1900UTC in summer time and 2000UTC in winter. Check on the #opensim IRC channel on Freenode just before each of these events if there is any confusion.

There is also a mailman email distribution list available at

Recent Git Commits

a few more 'events' (UbitUmarov) (Sat, 08 Aug 2020 11:47:08 -0700)
a few more 'events' UbitUmarov <ajlduarte at sapo dot pt> OpenSim/Region/Framework/Scenes/EventManager.cs
missing c&p ... (UbitUmarov) (Sat, 08 Aug 2020 10:32:32 -0700)
missing c&p ... UbitUmarov <ajlduarte at sapo dot pt> .../Shared/Api/Implementation/OSSL_Api.cs
some cleanup to last patch from Bill Blight and Vincent (mantis 8738) (UbitUmarov) (Sat, 08 Aug 2020 10:27:45 -0700)
some cleanup to last patch from Bill Blight and Vincent (mantis 8738) UbitUmarov <ajlduarte at sapo dot pt> .../Shared/Api/Implementation/OSSL_Api.cs
osSetParcelMusicURL (Vincent Sylvester) (Fri, 07 Aug 2020 22:43:57 -0700)
osSetParcelMusicURL Signed-off-by: UbitUmarov <> Vincent Sylvester <vincentsylvester at zetamex dot com> .../Shared/Api/Implementation/OSSL_Api.cs
better a silent return if condition to send creator fails (UbitUmarov) (Sat, 08 Aug 2020 09:48:58 -0700)
better a silent return if condition to send creator fails UbitUmarov <ajlduarte at sapo dot pt> .../Shared/Api/Implementation/LSL_Api.cs

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