SDK 0.3.0 release

Highlights

• New AgentClient in the Python, TypeScript, and Rust SDKs for calling one agent through the Agent Execution API with an agent key (EVERRUNS_AGENT_URL / EVERRUNS_AGENT_KEY). It covers run(), sessions, events and SSE streaming, cancel, questions, tool approvals, runtime tokens, for_end_user, and idempotency keys. The management client is now deprecated in favor of AgentClient.
• Change reasons: all SDKs gain with_reason / withReason, a derived client that sends the Everruns-Change-Reason header so the server records the reason in entity change history.
• The default base URL is now Everruns Cloud (https://app.everruns.com/api) instead of a placeholder, so a client created with only EVERRUNS_API_KEY works. EVERRUNS_API_URL still overrides it for self-hosted.
• Docs: how to connect an AG-UI client to an Everruns endpoint.
• OpenAPI examples no longer name the sunset Claude Sonnet 4.5.

In the changelog

• Everruns SDKs default to the Everruns Cloud API URL
• Everruns SDKs record why a change was made
• Everruns SDKs add AgentClient to call one agent with a key

See the GitHub release and the full release notes for every pull request in this version.