Module resilience 

Resilience primitives for tool execution.

Collects the concerns that govern how tools recover from and bound transient failures:

• circuit_breaker - state-machine fault isolation (Closed/Open/HalfOpen) keyed by tool name. Tracks failure counts, applies exponential backoff, and short-circuits calls when a downstream is degraded.
• adaptive_rate_limiter - per-key token-bucket rate limiter with adaptive refill and priority weighting. Used to throttle tools whose cost varies with the call.
• rate_limiter - per-tool budgeted counter rate limiter. Provides the per-tool token bucket that the executor uses for synchronous admission.
• ToolResilience - the unified facade. New callers should use this rather than reaching for the individual primitives, so that all three invariants (admission, fault isolation, post-call accounting) are checked in one place.

The primitives share callers (autonomous executor, tool pipeline, agent error recovery) but address distinct failure modes; they are grouped here so a maintainer can audit the full resilience toolkit in one place.

Modules

adaptive_rate_limiter

circuit_breaker

rate_limiter

Simple in‑process rate limiter for tool execution.

Structs

ToolResilience

Unified facade for tool resilience. Wraps the adaptive rate limiter and the circuit breaker so callers can use a single API for admission, fault isolation, and post-call accounting.

Enums

CallOutcome

Outcome of a tool call, used by ToolResilience::record_outcome to update the circuit breaker.

Statics

GLOBAL_TOOL_RESILIENCE

Process-wide resilience facade. Constructed lazily from the shared adaptive rate limiter and a default circuit breaker.