Much of the agent section in the documentation is missing.
dockerfile is not there reuseNode is not there
Only the actual agent types are documented, not their parameters (some are mentioned in examples).
https://jenkins.io/doc/book/pipeline/syntax/#agent
It's coming! https://github.com/jenkins-infra/jenkins.io/pull/588 and https://github.com/jenkins-infra/jenkins.io/pull/715 are both pending release of 1.1.
Bulk closing resolved issues.