Create a file in your home directory named .taskwarrior-pomodoro-beeminder.cfg with contents something like the following:
# These settings will apply to all below sections
[DEFAULT]
username=<YOUR BEEMINDER USERNAME>
# Each section configures the application to post to a specific goal when
# a task matches its constraints. If you do not specify a goal slug,
# we'll assume that the goal slug in Beeminder matches the section name.
# For incrementing a specific goal for only tasks having specified tags:
# Note that tags are comma-separated, and *all* tags listed must be present
# on the given task. If you would like to increment a given goal when either
# of two tags are present, just create a new section having the same goal slug.
[some-arbitrary-name]
goal=<YOUR BEEMINDER GOAL SLUG>
tags=<TAG ONE>,<TAG TWO>
# For incrementing a specific goal for only tasks having a specified project:
# Note that you can use globbing; for example, if you wanted to increment this
# goal only when a task's project starts with "work", you could enter "work*"
[some-other-arbitrary-name]
goal=<YOUR BEEMINDER GOAL SLUG>
project=<YOUR PROJECT NAME>
Configure Taskwarrior Pomodoro to
increment the relevant Beeminder goals by entering the following into your ~/.taskrc: