Attribute Macro igg 

#[igg]

Declare IgG-class affinity-matured evidence (re-attestation history).

#[igg(witnesses = [...], historical_span = N, min_reattestations = N)] asserts that the defense has been re-attested across a time span. Per ADR-024 §Decision, source-independence is NOMINAL only — different signer identity strings are not structural proof of independent sources.

Arguments

• witnesses = [...] (required non-empty)
• historical_span = N (required, > 0; days)
• min_reattestations = N (required, > 0)

Audit hints

• igg-identity-collapse-warning — same signer across reattestations
• igg-span-too-short — historical span below floor
• igg-reattestations-insufficient — fewer reattestations than floor