Founded by Mark Miller and pioneers in secure development and distributed systems, Agoric uses a secure subset of JavaScript to enable object capabilities and smart contracts. Agoric’s “SwingSet” vat platform now supports evaluation of contract code outside of SES, providing a fallback for use in typical standard JS development tools, to preserve line numbers and stack traces. The shim which implements the proposed Javascript “Realms” API is being moved out of the TC39 proposal repository into a dedicated repository. The TC39 repo will continue to host the specification text itself.
- Agoric SES shim for Realms API realms-shim 
- ECMAScript spec proposal for Realms API reams-spec