Goal: 

• Currently running pre-commit tests locally isn't very straightforward, it's a chain of multiple commands and can pollute user's pip directory. It makes it difficult for AI agents to run those too.
• Make it a single command to run pre-commit tests (lints) and use a virtualenv for pre-commit installation.

Acceptance Criteria:

• Pre-commit tests can be run by "make lint". If there is setup needed first (installing pre-commit), it is automatically detected within the command and executed.
• Dependencies are installed into a virtualenv. (Not user's or system python packages.)
• Amend AGENTS.md file with the info to run "make lint" after making changes.
• Recommended but can be dropped in case of hurdles: Update CI config to run the make target instead of using the pre-config Github action? (2nd thought: we should probably split off another story for the CI edit.)