ruff.toml

# ═══════════════════════════════════════════════════════════
#  Tofu (豆腐) — Ruff Linter Configuration
# ═══════════════════════════════════════════════════════════
#
#  This config is used by both local development and CI.
#  CI step: ruff check lib/ routes/ tests/
#
# ═══════════════════════════════════════════════════════════

target-version = "py310"

[lint]
# Default rule set: pyflakes (F) + pycodestyle errors (E)
select = ["F", "E"]

ignore = [
    # ── Style choices (deliberate, not bugs) ──────────────
    "E501",   # Line too long — enforced by code review, not linter
    "E701",   # Multiple statements on one line (colon) — compact if/elif chains
    "E702",   # Multiple statements on one line (semicolon) — compact one-liners
    "E731",   # Lambda assignment — used for closures with captured variables
    "E741",   # Ambiguous variable name (l, O, I) — common in list comprehensions

    # ── Structural patterns (by design) ───────────────────
    "E402",   # Module-level import not at top — __init__.py lazy imports, sys.path in tests
]

[lint.per-file-ignores]
# Test files often manipulate sys.path before imports and use unused locals for mocking
"tests/*" = ["F401", "F841"]