Established the project baseline for gitscope and completed the first foundation milestone. The repository now has planning documents, design guidance, installable Python package metadata, a starter Textual app shell, a console entry point, and an initial test layout.

Completed

• Added project planning docs: README.md, PRD.md, AGENTS.md, and roadmap.md.
• Added DESIGN.md and banner.png as the visual reference for the TUI.
• Updated README.md to show the banner image.
• Added pyproject.toml with Python package metadata, Textual dependency, console script, and pytest configuration.
• Added the initial src/gitscope package with __init__.py, __main__.py, cli.py, and app.py.
• Added a Milestone 1 Textual shell with the major design zones: title bar, refs sidebar, commit table, diff pane, status bar, and footer.
• Added initial tests in tests/test_foundation.py.
• Updated AGENTS.md to make following DESIGN.md compulsory for all TUI work.

Verification

• py -m pip install . completed successfully.
• gitscope --version returned gitscope 0.1.0.
• py -m pytest passed with 3 tests.
• A headless Textual mount smoke check completed successfully.

Notes

• The current implementation is intentionally limited to Milestone 1 foundation work.
• Git backend, graph layout, diff parsing, real refs, and live commit loading remain future milestone work.
• On this machine, python resolves to an MSYS Python without pip, so verification used the working Windows launcher command py.