[aaltshuler]

Amends the accepted graph access RFC from #1017. It bundled client access and error contracts with a separate engine concurrency redesign, making client completion depend on new manifest control facts, a storage stamp and cross-process qualification.

Retitle it “Graph access and client contracts” and remove the engine design, its rollout and evidence gates, and the dependent disposition.check protocol. Preserve the current writer-process restrictions and cluster admission. Update the registry, HTTP-conventions title reference and storage-outcomes dependency statements; keep the canonical filename and record the maintainer's October 24 scope decision.

Documentation validation passes across all 400 Markdown files, the agent-guide consistency check passes, and spelling and whitespace checks pass. An independent scope review found no remaining normative engine-redesign promises. No runtime code or storage contract changes.

For review: the existing client scope remains accepted and in progress. Historical engine decisions remain in the decision log, explicitly superseded; a future engine redesign needs its own RFC. Storage-outcomes settlement remains owned by its unchanged §5. The open #951 branch still references the withdrawn disposition.check proposal and will need to reconcile that dependency before landing; it is not part of this amendment.