Skip specific types of pipelines based on commit message

I'm aware of the [skip ci] tag, which is super useful, but there are some cases where a little more control is required. For example, let's say I don't want to trigger a branches pipeline but I do want to be able to trigger a tags pipeline, it would be nice if I could just add something like [skip branches] in the commit message, that way branches pipelines are not triggered but everything else is.

Practical example:

#!python

pipelines:
  branches:
    master:
      - step:
          script:
			- echo "Auto version up"
			- echo "Commit and push with [skip branches] in message" # Avoid endless loop

  tags:
    external/**:
      - step:
          script:
			- echo "Create build"

In the example above I want to automatically version up my application every time a new change is pushed to master and I want to create a build every time a commit in master is tagged as external/**.