Kit by Speakeasy

Kit is Speakeasy's runtime for coding agents, packaged as a single static binary containing a terminal client, an Agent Client Protocol (ACP) server, an A2A endpoint and a subagent orchestrator. The ACP separation is the architectural claim: because the protocol is the boundary, Kit works with compatible editors and can orchestrate other agent harnesses without bespoke integrations for each. It is a bet that agent tooling converges on shared protocols rather than on one vendor's harness — the same wager behind the A2A and MCP standardisation argument playing out across developer tooling this year.