Unix-style pipes allow tremendous expressiveness in chaining together complex and flexible commands.
!echo world | echo hello
Sub-expressions let you embed the output of one
command into an outer command. They can be nested as many levels
deep as you can imagine.
!wolfram $(weather seattle | data $.temp) Celcius to Fahrenheit
Aliases let you parameterize complex expressions
and give them a name allowing your team to quickly build up
idiomatic team-specific Yetibot usages (not just memes!).
!alias randletter = "range 65 91 | xargs echo | random | js String.fromCharCode(%s)"
Observers let Yetibot respond to user events with
regex matching on messages and reactions as well as events like
leaving and entering a room.
!obs -e enter = meme sparta: welcome / this is Yetibot chat
Scrapers let Yetibot scrape from web sites and
parse HTML or JSON into data structures that can be deeply queried
with JSON Path syntax. These combine nicely with aliases!
!json https://api.coinbase.com/v2/prices/BTC-USD/spot | json path $.data.amount
Cron lets you run any expression on an interval
or date at second-level precision.
!cron 0 0 12 * 11 11 * meme grumpy cat: happy birthday yetibot