• How to use @11ty/client
• Removed slug filter Remove slug filter (deprecated in v1) #3893
• Removed --to=ndjson Remove --to=ndjson feature #3382
• eleventyConfig.addEngine
• Adds --to=fs:templates CLI option (and to write to file system but skips over passthrough copy. Also adds Eleventy#write("templates") and Eleventy#write("copy")

#3858