Naive detection if a keybase user collaborates with you. POC, inefficient, perhaps broken, do not use.

collaborate_with

#!/usr/bin/env bash

USER=`keybase status | grep Username | awk '{print $NF}'`;
COLLAB_DIR="/keybase/public/$USER/collab"

FILE=`mktemp -t "XXXXXXXXXX" -p $COLLAB_DIR`

echo $1 | keybase encrypt -b --hide-recipients $1 > $FILE

collaborates

#!/usr/bin/env bash

COLLAB_DIR=/keybase/public/$1/collab

# if not present
if [ ! -d $COLLAB_DIR ]; then
    echo "$1 has not setup collaboration detection"
    exit 3
fi

#if empty
if [ $(find $COLLAB_DIR -maxdepth 0 -type d -empty 2>/dev/null) ]; then
    echo "$1 does not collaborate with anyone"
    exit 2
fi

# if filled
for f in $COLLAB_DIR/*;
do
    keybase decrypt -i $f &> /dev/null
    if [ $? -eq 0 ]; then
        echo "$1 collaborates with you"
        exit 0
    fi
done

echo "$1 does not collaborate with you"
exit 1