REST + OpenAPI
@prism/hono — toFetch / toHono. Human surface; remote-safe when you hold the credentials.
One definition. Every surface.
Define an operation once. Project it to REST + OpenAPI, MCP tools, AI SDK tools, and a CLI — with typed errors, per-caller filtering, and a confirmation gate a model cannot forge.
The thesis
Section titled “The thesis”One operation. Four projections. No duplicated handlers.
MCP tools
@prism/mcp — toMCP. Agent surface; remote-safe over Streamable HTTP with verify.
AI SDK tools
@prism/ai-sdk — toAiSdkTools. In-process; trusted server runtime only.
CLI
@prism/cli — toCli. Operator surface; assumes a trusted human at the keyboard.
Install from npm →npm install @prism/core — define an operation, serve it in one page.