Module rate_limiter 

Atomic sliding-window rate limiter for tool dispatch.

Provides O(1) per-check rate limiting using lock-free atomics. Per-tool and global RPM enforcement with burst allowance.

Configuration

Limits are configurable via RateLimiterConfig (defaults in RateLimiterConfig::default) or the environment:

Variable	Default	Description
WM_DISPATCH_GLOBAL_RPM	600	Max total dispatches/min across all tools
WM_DISPATCH_TOOL_RPM	240	Default per-tool RPM limit
WM_DISPATCH_BURST	20	Extra burst capacity per tool
WM_DISPATCH_TOOL_OVERRIDES	—	tool:rpm,tool2:rpm2 per-tool overrides

Ported from v2-reference/safety/rate_limiter.rs — PyO3 and lazy_static removed.

Structs

RateLimiter

Rate limiter managing per-tool and global windows.

RateLimiterConfig

Configuration for a RateLimiter.

SlidingWindow

A sliding-window counter using two half-windows for smooth transitions.

Constants

DEFAULT_BURST

DEFAULT_GLOBAL_RPM

Default limits — the values used by RateLimiter::default.

DEFAULT_TOOL_RPM