Module stale 

Stale detection for extension contexts.

When a session switches, forks, or reloads, all extension contexts from the previous session become stale. The guard uses an atomic generation counter to detect this efficiently.

Structs

ContextGuard

Guard that checks whether its context is still valid.

InvalidationToken

Shared generation counter for invalidation. Create one per session. When the session changes, call invalidate() to bump the generation.