ty check                      # Check all files in current directory
ty check path/to/file.py      # Check specific file
ty check src/                 # Check specific directory

ty check --error possibly-unresolved-reference   # Treat as error
ty check --warn division-by-zero                 # Treat as warning
ty check --ignore unresolved-import              # Disable rule

ty check --python-version 3.12     # Check against Python 3.12
ty check --python-platform linux   # Target Linux platform

# pyproject.toml
[tool.ty.environment]
python-version = "3.12"

[tool.ty.rules]
possibly-unresolved-reference = "warn"
division-by-zero = "error"

[tool.ty.src]
include = ["src/**/*.py"]
exclude = ["**/migrations/**"]

[tool.ty.terminal]
output-format = "full"
error-on-warning = false

[[tool.ty.overrides]]
include = ["tests/**", "**/test_*.py"]

[tool.ty.overrides.rules]
possibly-unresolved-reference = "warn"

mypy .                        → ty check
mypy --strict .               → ty check --error-on-warning
mypy path/to/file.py          → ty check path/to/file.py

pyright .                     → ty check
pyright path/to/file.py       → ty check path/to/file.py

# Good: rule-specific ignore
x = undefined_var  # ty: ignore[possibly-unresolved-reference]

# Bad: blanket ty ignore
x = undefined_var  # ty: ignore

# Bad: tool agnostic blanket ignore
x = undefined_var  # type: ignore