HTTP/2 301
server: GitHub.com
content-type: text/html
location: https://keyproject.github.io/key-docs/
x-github-request-id: 4432:1D36AC:856C3:9C125:6972F5B2
accept-ranges: bytes
age: 0
date: Fri, 23 Jan 2026 04:14:43 GMT
via: 1.1 varnish
x-served-by: cache-bom-vanm7210032-BOM
x-cache: MISS
x-cache-hits: 0
x-timer: S1769141683.906025,VS0,VE220
vary: Accept-Encoding
x-fastly-request-id: b8bd898ecaa088a1bc1aceb2205d1c7a29911f82
content-length: 162
HTTP/2 200
server: GitHub.com
content-type: text/html; charset=utf-8
last-modified: Sat, 17 Jan 2026 02:38:07 GMT
access-control-allow-origin: *
etag: W/"696af60f-b357"
expires: Fri, 23 Jan 2026 04:24:43 GMT
cache-control: max-age=600
content-encoding: gzip
x-proxy-cache: MISS
x-github-request-id: 1C29:21E2C5:80BB7:975A7:6972F5B1
accept-ranges: bytes
age: 0
date: Fri, 23 Jan 2026 04:14:43 GMT
via: 1.1 varnish
x-served-by: cache-bom-vanm7210032-BOM
x-cache: MISS
x-cache-hits: 0
x-timer: S1769141683.139383,VS0,VE272
vary: Accept-Encoding
x-fastly-request-id: 655026d86e9a3d220b15b36266482dece71b3368
content-length: 7205
KeY Developer Documentation
Overview
This web page contains information for users and developers of the KeY
Deductive Verification System.
If you are new to the KeY System, you should start with the excerpt Using the Prover from the KeY Book.
The documentation is split into two major parts:
If you want to contribute to this documentation, please refer to How to write documentation.
The KeY Team.