TypeError: Secondary flag is not valid for non-boolean flag (typer 0.12 incompatible with click >= 8.2)

[aculich]

Bug description

With a fresh install of gcop, every command crashes immediately while typer builds the CLI:

TypeError: Secondary flag is not valid for non-boolean flag.

Traceback ends in:

typer/main.py:900 in get_click_param
typer/core.py:427 in __init__
click/core.py:2942 in __init__
TypeError: Secondary flag is not valid for non-boolean flag.

Root cause

pyproject.toml pins typer = "^0.12.3" but allows click = "^8.1.7", which permits click 8.2+. Click 8.2 changed flag option validation, and typer < 0.16 passes secondary flag names in a form that click >= 8.2 rejects. Any fresh dependency resolution today picks up click 8.4.x and the CLI is unusable.

Existing installs with an older click in their environment are unaffected, which is why this only shows up on new installs or venv rebuilds.

Reproduction

pipx install gcop   # resolves click 8.4.x today
gcop --help         # TypeError: Secondary flag is not valid for non-boolean flag.

Downgrading click in the venv confirms the diagnosis:

pipx runpip gcop install 'click<8.2'
gcop --help         # works

Suggested fix

Either cap click below 8.2 (click = ">=8.1.7,<8.2"), or upgrade the typer dependency to >= 0.16 which supports the new click behavior. The cap is the minimal low-risk change; I will submit a PR.

Related: #367