> For the complete documentation index, see [llms.txt](https://docs.opus.money/current/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.opus.money/current/technical-documentation/security/external.md).

# External

The core contracts found in [opus\_contracts](https://github.com/lindy-labs/opus_contracts) and [opus\_compose](https://github.com/lindy-labs/opus_compose) directories have been audited to the extent set out in each audit:

* [Trail of Bits](https://github.com/trailofbits/publications/blob/master/reviews/2023-12-opus-contracts-securityreview.pdf)
* [Code4rena](https://code4rena.com/reports/2024-01-opus)
* [Cairo Security Clan](https://github.com/Cairo-Security-Clan/Audit-Portfolio/blob/main/Opus_Audit_Report.pdf)