My original pattern had the wrong stitch legend in it. I will correct and update the pdf but also want to share the correct symbols here..
Symbol Meaning
(blank) knit
● (filled circle) purl
o (open circle) yo (yarn over)
\ ssk (left-leaning decrease)
/ k2tog (right-leaning decrease)
Q-shape (twisted loop) ktbl (knit through the back loop)