Changelog

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1.10.44

  • Replace mandatory Finch/Mint with Fetch and retain request-owned HTTP cleanup evidence across legacy SSE and modern Streamable HTTP (#120).
  • Add caller-owned resource list, template and read handles with independent await/cancel semantics (#123).
  • Add one-shot connections and retained close reports. Verified stdio uses an explicitly built Linux/macOS guardian to confirm its direct child, helper and local pipes; ordinary stdio remains available without native compilation (#122).

Unreleased

  • Fixes single Peri validation errors crashing tool and prompt input handling, preserves nested error details, and makes Schema.validator/1 callbacks safe to compose with Peri custom validators.
  • Adds Agent Note HTTP parity regression coverage and documents upgrading from retired 1.6.3 to published 1.10.12 for modern discovery and tool calls.
  • Fixes Streamable HTTP :auto negotiation so a valid server/discover -32601 Method not found response falls back to the canonical legacy initialization flow while explicit version pins remain strict.
  • Adds complete MCP 2026-07-28 client and server support over Streamable HTTP and stdio.
  • Defaults new clients to protocol_version: :auto, using modern server/discover with evidence-based legacy fallback while preserving explicit version pins.
  • Adds stateless modern request execution, required metadata and HTTP headers, modern result and cache envelopes, MRTR, and request-owned subscriptions.
  • Preserves arbitrary JSON Schema 2020-12 wire maps and every JSON structuredContent shape while safely disabling unsupported local validation.
  • Adds modern authorization issuer, registration-selection, and secure credential-store helpers.
  • Freezes official 2026-07-28 client and server conformance coverage and keeps all legacy protocol versions available.
  • Defers the optional modern io.modelcontextprotocol/tasks extension; legacy 2025-11-25 Tasks support remains available.

0.4.0

  • Keeps the Hex package version synchronized with Backplane releases.
  • Restores required Hex publication to the Backplane release workflow.

0.3.1

  • Integrates backplane_mcp_protocol into the Backplane umbrella build.
  • Corrects package source and documentation links for the umbrella location.

0.3.0

  • Provides Backplane.McpProtocol client and server primitives for MCP clients, servers, components, transports, JSON-RPC messages, SSE parsing, task handling, and session storage.
  • Supports Streamable HTTP, SSE, stdio, and WebSocket-oriented MCP integration paths.
  • Includes ExDoc guides for building MCP clients, servers, and common recipes.

Retired releases

1.6.3

This release used the Backplane umbrella version by mistake and is retired. Use a supported release such as 1.10.12 for MCP 2026-07-28 support.