Module about 

The about op — server identity and SCRAM authentication handshake.

Overview

GET /api/about is dual-purpose:

• Unauthenticated (HELLO / SCRAM): drives the three-phase SCRAM SHA-256 handshake (HELLO → server challenge, SCRAM → client proof verification, BEARER → authenticated access).
• Authenticated (BEARER token): returns the server about grid.

POST /api/close revokes the bearer token (logout).

Request

No request grid is required. Authentication state is conveyed via the Authorization header (HELLO, SCRAM, or BEARER scheme).

Response Grid Columns

Column	Kind	Description
haystackVersion	Str	Haystack specification version (e.g. "4.0")
serverName	Str	Server implementation name
serverVersion	Str	Server software version
productName	Str	Product name
productUri	Uri	Product homepage URI
moduleName	Str	Module / crate name
moduleVersion	Str	Module / crate version

Errors

• 401 Unauthorized — missing or invalid Authorization header.
• 403 Forbidden — HELLO lookup failed or SCRAM proof verification failed.
• 500 Internal Server Error — grid encoding failure.

Functions

handle

GET /api/about

handle_close

POST /api/close — revoke the bearer token (logout).