HTTP/2 301
server: GitHub.com
content-type: text/html
location: https://keyproject.github.io/key-docs/
x-github-request-id: FA10:1790FD:66C7B:74CEB:69701142
accept-ranges: bytes
age: 0
date: Tue, 20 Jan 2026 23:35:33 GMT
via: 1.1 varnish
x-served-by: cache-bom-vanm7210043-BOM
x-cache: MISS
x-cache-hits: 0
x-timer: S1768952133.158470,VS0,VE215
vary: Accept-Encoding
x-fastly-request-id: feb2c13f001dbeab883bf8cbd3a31ca0b2c06445
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: Tue, 20 Jan 2026 23:45:33 GMT
cache-control: max-age=600
content-encoding: gzip
x-proxy-cache: MISS
x-github-request-id: CE32:1E6123:6067D:6E6FF:69701145
accept-ranges: bytes
age: 0
date: Tue, 20 Jan 2026 23:35:33 GMT
via: 1.1 varnish
x-served-by: cache-bom-vanm7210043-BOM
x-cache: MISS
x-cache-hits: 0
x-timer: S1768952133.386705,VS0,VE239
vary: Accept-Encoding
x-fastly-request-id: 178339804a587e7e6585ddd4d10f192d332766dd
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.