# Clippy is run with `-D warnings` in CI (CLAUDE.md §10.4), so every lint we
# enable here is a build failure. Only turn on lints we are willing to fix.

[lints.rust]
# Silent truncation of a u64 millisecond count into a u32 is a real bug class in
# this codebase (usage counters, monotonic deltas). Make it impossible to miss.
integer_conversions = "deny"

[lints.clippy]
# Engine code is mostly pure data transformation; `&self` everywhere reads better
# than `&mut self` and avoids accidental aliasing bugs across the FFI boundary.
needless_pass_by_ref_mut = "warn"

# Large enum variants waste stack in the hot evaluate() path.
large_enum_variant = "warn"

# Every OS call returns Result; we handle them all, but catch `.unwrap()` slips.
unwrap_used = "deny"
expect_used = "deny"

# Panicking in release builds is a last resort — see CLAUDE.md §0.5.
panic = "deny"

# Prefer clarity over micro-optimisation; perf budgets in §5 are measured with
# real benchmarks, not by guessing at clever rewrites.
too_many_arguments = "warn"