Diff vs Claude Agent SDK
High-level positioning
Section titled “High-level positioning”- Open Agent SDK: open source, multi-provider, Bun/Node-first runtime
- Claude Agent SDK: Anthropic ecosystem defaults and vendor-first experience
Capability-level diff
Section titled “Capability-level diff”| Area | Open Agent SDK | Claude Agent SDK |
|---|---|---|
| Source model | MIT open source | Closed source |
| Model providers | OpenAI / Google / Anthropic | Primarily Anthropic ecosystem |
| Session model | create/resume/fork | session-based workflows |
| Permission model | default / acceptEdits / bypassPermissions / plan | permission-gated model |
| MCP | Supported | Supported |
| Hooks | Typed lifecycle/tool hooks | Hook-like extensibility |
API-shape differences to watch
Section titled “API-shape differences to watch”- Option names are similar conceptually but not guaranteed identical.
- Provider config is explicit and multi-vendor in Open Agent SDK.
- Permission callbacks use typed
PermissionResultunions. - Tool and message types are exported for stricter app-level typing.
Recommendation
Section titled “Recommendation”Treat migration as concept-compatible, not drop-in binary-compatible. Validate each integration surface (provider, permissions, hooks, tools) with focused tests.