Module diff 

What a plugin changed, derived from two consecutive snapshots.

This is computed at read time (when a trace is fetched), not while recording. Two reasons: the traced request path stays as cheap as possible, and the comparison stays a pure function with no engine coupling — trivially unit-testable in isolation.

The comparison is purpose-built rather than a generic JSON differ: it knows that headers are name → values maps and that errors is append-only, so it can emit paths a policy author recognises (request.headers.x-userinfo, message.user_id) instead of structural noise.

Structs

Change

One field-level difference.

Enums

ChangeKind

How a field changed between two steps.

Functions

compact 🔒

diff

Computes what changed between two consecutive snapshots.

multi_map 🔒

Compares a name -> values map, reporting per-name adds/removes/modifies.

scalar 🔒