Per VERSIONING.md (see the policy PR): V1 = formalization compatible with the V0 status quo (even if degraded); V2 = not backwards compatible. Every spec file and every open spec PR needs the classification added to its header. Candidate quick reads: parallel-namespace specs behind legacy_namespace gating → V1 with gated V2 sections; renames like fallback.ping/pong → V2 unless dual-emitted.
Per VERSIONING.md (see the policy PR): V1 = formalization compatible with the V0 status quo (even if degraded); V2 = not backwards compatible. Every spec file and every open spec PR needs the classification added to its header. Candidate quick reads: parallel-namespace specs behind legacy_namespace gating → V1 with gated V2 sections; renames like fallback.ping/pong → V2 unless dual-emitted.