Reworks federation from binary rules into the plane/ladder/posture form from
ADR-008 (Four Planes), reusing its vocabulary rather than adding a second
maturity language to the canon.
Four planes: Namespace, Autonomy, Reconciliation, Substrate, each with a
ladder. Draft-1's 'records fork, effects do not' becomes the S ladder.
Posture is declared in the repo per ADR-010 decision 4; the ecosystem's own
posture is recorded honestly as N1 U1 R1 S1.
Key additions: conformance is accuracy not altitude; an anti-overclaim rule
stating that namespace qualification is N-plane movement only and does not
make anything federation-capable, with a commercial clause for
instance-per-client claims; the reconciliation tier is now DERIVED from
participants' postures (any S3 entails T3), so rejoining cost is computable
before a fork exists rather than discovered during reconciliation; evidence
definitions per level; and guard via rmgr conform.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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