Changelog

Major product and MCP updates shipped to Aria Icons.

1. morphAug 18, 2026Product

   Icon morph playground

   Stroke icons can now morph into each other in the inspector, powered by morphicons. Optimal rotation is solved in closed form; springs stay interruptible.

   Added

   • +Added a Morph tab beside Static: pick two or more line icons, play the sequence, and scrub the interpolation.
   • +Added drag-to-reorder on the morph sequence, plus copy/export for React, Vue, Svelte, React Native, HTML, and vanilla.
   • +Added morph compatibility — path structure, geometry, stroke, and interpolation.
2. dual-eraAug 13, 2026MCP

   Cursor MCP compatibility

   The remote MCP endpoint now speaks both the stateless 2026-07-28 protocol and the handshake-based protocol Cursor still uses. No session stickiness — initialize is answered in-request and then forgotten.

   Added

   • +Added dual-era Streamable HTTP: Cursor initialize / tools/list / tools/call work without the new MCP headers.
   • +Added ping and notifications/initialized handling for handshake clients.
   • +Kept server/discover and per-request _meta validation for 2026-07-28 clients.
3. 2026-07-28Aug 9, 2026MCP

   Stateless MCP architecture

   Migrated the remote MCP server to protocol 2026-07-28. Every request is now self-contained — no sessions, no handshake, ready for serverless deployment.

   Removed

   • −Removed the initialize / initialized handshake in favor of per-request metadata.
   • −Removed Mcp-Session-Id and all session stickiness from the Streamable HTTP transport.
   • −Removed the GET SSE stream endpoint (deprecated HTTP+SSE transport).
   • −Removed the @modelcontextprotocol/sdk dependency and duplicated handler code.
   • −Dropped support for legacy protocol version 2024-11-05.

   Added

   • +Added server/discover to advertise supported versions, capabilities, and server identity.
   • +Added per-request validation of params._meta.io.modelcontextprotocol/protocolVersion.
   • +Added required HTTP headers: MCP-Protocol-Version, Mcp-Method, and Mcp-Name.
   • +Added resultType: "complete" on all JSON-RPC results.
   • +Added io.modelcontextprotocol/serverInfo in _meta on every response.
   • +Added cache hints (ttlMs + cacheScope: "public") on discover, list, and read operations.
   • +Added spec error codes -32020 (HeaderMismatch), -32022 (UnsupportedProtocolVersion), and -32601 (Method not found).
4. 2024-11-05Dec 13, 2025MCP

   Initial MCP server

   Shipped the first remote MCP endpoint for Aria Icons with tools and resources over Streamable HTTP using the legacy session-based protocol.

   Added

   • +Added POST /api/mcp as a JSON-RPC endpoint for remote MCP clients.
   • +Added the initialize / initialized session handshake.
   • +Added tools: list_icons and get_icon_svg.
   • +Added resources for each icon set and a combined all resource.
   • +Added the MCP connect dialog in the UI.