docs: sync agents PR #720 - protocol version validation in worker transport #26990
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Add documentation explaining the stateless approach to MCP protocol version validation in the Agents SDK transport layer. This change clarifies that: - The MCP-Protocol-Version header is optional on subsequent requests - Version consistency is not enforced across requests - Only explicitly unsupported versions are rejected Synced from cloudflare/agents PR #720 (fix: protocol version validation in worker transport) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Sync from cloudflare/agents PR #720 Changes: - Remove protocolVersion field from TransportState interface (no longer stored) - Update persistent storage benefits to remove protocol version tracking - Add new Protocol Version Validation section explaining stateless validation approach The WorkerTransport now validates protocol version headers without tracking negotiated versions. It accepts any supported version or missing headers, only rejecting explicitly unsupported versions. Protocol negotiation is handled by the MCP SDK. Related: cloudflare/agents#720
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Summary
Syncs documentation updates from cloudflare/agents PR #720: fix: protocol version validation in worker transport
Changes
This PR updates the
WorkerTransportdocumentation to reflect the move to stateless protocol version validation:protocolVersionfield fromTransportStateinterface documentation - the transport no longer stores negotiated protocol versionsWhat Changed in the Agents SDK
The
WorkerTransportnow:This aligns with the move to stateless transports in the MCP protocol.
Related
🤖 Generated via automated documentation sync from cloudflare/agents