{"version":"2.1.286","anchor":"mcp-connection-detach-logic-refactored-delivery-ack-flush-c","canonical_anchor":"mcp-connection-detach-logic-refactored-delivery-ack-flush-c","heading":"Remote session delivery acknowledgements track dropped batches, with MCP reconnect changes","tier":"internal","area":"MCP","url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286\/e\/mcp-connection-detach-logic-refactored-delivery-ack-flush-c","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.286","markdown":"### Remote session delivery acknowledgements track dropped batches, with MCP reconnect changes\n\nRemote sessions now count dropped delivery acknowledgements and can confirm a flush, alongside MCP disconnect and remote diagnostics changes\n\n**Unclear.** Whether any of this has an effect a user can notice is not known.\n\n**What**\n\nIn a remote session, Claude Code runs on another machine and sends back acknowledgements (acks) confirming what it received. Several pieces of this plumbing changed.\n\n- `droppedDeliveryAckBatches` is a new counter that goes up when a batch of acks is dropped because the server rejects it with a 4xx error.\n\n- `flushDeliveryAcksConfirmed` sends any waiting acks and reports whether a batch was dropped along the way.\n\n- Disconnecting an MCP server (an add-on program that gives Claude Code extra tools) now goes through a shared helper that is told whether the settled connection matches the configured one. Before, this check was done inline.\n\n- When a streamed connection is refused because the request came from a different site, an `onRefused` handler now runs.\n\n- New records note when a turn is cut off, including when the host cuts it.\n\n- A new share action was added to the list of recognised actions, and a `\/devices\/mcp` path was added.\n\n**Why**\n\nThese changes are not visible in normal use. They let Claude Code tell when confirmations from a remote session were lost instead of assuming they arrived, and they tidy how MCP connections are closed and reconnected.\n\n- Area: MCP\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 2\/5"}