Module trust 

Trust and lifecycle frontmatter: generated, verified, status, and stale_after (§5.2 to §5.5).

These four keys let a consumer answer “how much should I trust this” and “is it still current” from frontmatter alone. All are optional, and their absence is meaningful rather than invalid: a concept with no trust frontmatter is TrustTier::Unverified and status: stable, and must never be rejected (§11).

Two rules from the spec are encoded here rather than left to callers:

• A bare verified: { by, at } mapping must be read as a one-element list (Verification::list_from_value, §5.2).
• The trust tier is derived from verified, never stored (TrustTier::derive, §5.3).

Structs

Generated

How the current content was produced (§5.2): generated: { by, at }.

Verification

A single verification event (§5.2): { by, at }.

Enums

Status

A concept’s lifecycle status (§5.4). An absent key means Status::Stable.

TrustTier

A concept’s trust tier, derived from verified (§5.3).

Constants

STATUS_VALUES

The status values §5.4 defines.

Functions

is_stale_at

Whether a concept with this stale_after timestamp is stale at now.

is_stale_on

Whether a concept with this stale_after timestamp is stale on today.

latest_verification

Returns the verification with the latest parseable at (§5.2).