Set up environment for copilot agent with Python and uv support

[Copilot]

This PR adds uv (fast Python package manager) to the Nix development environment to support copilot agent development workflows.

Changes Made

Environment Setup

• Added uv package to buildInputs in shell.nix for fast Python package management
• Enhanced shell hook to display both Python and uv availability when entering the environment
• Maintained all existing functionality - all 22 tests continue to pass

Documentation

• Updated README.md with a new "Development Environment" section
• Documented uv usage including virtual environment creation and package installation
• Clarified installation instructions to use pyproject.toml instead of non-existent requirements.txt

Environment Now Provides

• ✅ Python 3.11 (via Nix) for development
• ✅ uv 0.7.15 for fast package management and virtual environments
• ✅ All existing tools (pytest, ruff, pre-commit, etc.)
• ✅ Seamless integration between traditional pip and modern uv workflows

Usage Examples

# Enter development environment
nix-shell

# Use uv for package management
uv venv                    # Create virtual environment
uv pip install -e .       # Install project in development mode
uv add click              # Add dependencies quickly

The environment is now ready for copilot agent development with both Python and uv available as requested.

Fixes #26.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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[simone-viozzi]

ok but you did not write the required copilot agent configuration

• https://docs.github.com/en/copilot/how-tos/agents/copilot-coding-agent/customizing-or-disabling-the-firewall-for-copilot-coding-agent
• https://docs.github.com/en/copilot/how-tos/agents/copilot-coding-agent/customizing-the-development-environment-for-copilot-coding-agent#preinstalling-tools-or-dependencies-in-copilots-environment

please create a .github/workflows/copilot-setup-steps.yml that add the firewall to astral.sh an install uv and the other required things

[Copilot]

ok but you did not write the required copilot agent configuration

• https://docs.github.com/en/copilot/how-tos/agents/copilot-coding-agent/customizing-or-disabling-the-firewall-for-copilot-coding-age...

Created .github/workflows/copilot-setup-steps.yml with firewall configuration for astral.sh and automated uv installation. The workflow configures the Copilot environment before the firewall is enabled, allowing access to required dependencies. Commit: 02c1a52

[simone-viozzi]

not needed, use uv to install python

[Copilot]

Removed apt-get Python installation and now using uv python install instead. Commit: afb296f

[Copilot]

@simone-viozzi Thanks for sending me some feedback. Unfortunately, I hit an error while trying to use the custom Copilot setup steps configured for this repository. The error I am seeing is:

No `copilot-setup-steps` job found in your `copilot-setup-steps.yml` workflow file. Please ensure you have a single job named `copilot-setup-steps`. For more details, see https://gh.io/copilot/actions-setup-steps.

Once you or someone with the necessary access fixes the problem, please let me know in a comment and I'll try again. Thanks!

[simone-viozzi]

edit the copilot-setup-steps.yml to fix the error

[Copilot]

@simone-viozzi Thanks for sending me some feedback. Unfortunately, I hit an error while trying to use the custom Copilot setup steps configured for this repository. The error I am seeing is:

No `copilot-setup-steps` job found in your `copilot-setup-steps.yml` workflow file. Please ensure you have a single job named `copilot-setup-steps`. For more details, see https://gh.io/copilot/actions-setup-steps.

Once you or someone with the necessary access fixes the problem, please let me know in a comment and I'll try again. Thanks!

[Copilot]

edit the copilot-setup-steps.yml to fix the error

Fixed the job name from setup to copilot-setup-steps in the workflow file to meet GitHub requirements. Commit: 79216c9