Distribution metadata release.
- Adds an official MCP Registry manifest for deploy-your-own remote Workers.
- Publishes Registry metadata from GitHub Releases with secretless GitHub OIDC authentication.
- Pins and checksums the Registry publisher instead of executing an unversioned download.
- Keeps npm publication disabled because Durable Thinking does not ship a local stdio executable.
The live OAuth reliability fixes from v3.1.1 remain unchanged.