v4.0.0: chore: normalize 4.0.0 release lineage

MemKraft 4.0.0

Self-Evolving Agent Substrate

MemKraft 4.0 turns agent experience into evidence-backed, versioned, reversible system improvement without allowing the memory substrate to self-authorize or execute changes.

Public contracts

• experience_record: sanitized task outcome and correction/failure provenance.
• artifact_capability_manifest: descriptive artifact kind, data scope, side-effect class, and review/rollback declarations. It grants no permission.
• evaluator_receipt: immutable evaluator metadata bound to candidate, base revision, corpus, metrics, environment, results, verdict, and evidence.
• activation_observation: post-activation health and regression evidence.
• self_evolving_project: deterministic read projection of the append-only substrate log.
• MemoryAdapter: transport-neutral remember, recall, feedback, and health facade for Hermes, OpenClaw, MCP, and other hosts.
• Gold retrieval evaluator: Recall@K, MRR, NDCG, latency, and stale-hit reporting without coupling evaluation to a provider.

Safety boundary

MemKraft 4.0 does not execute commands, deploy artifacts, schedule evolution, grant permissions, evaluate models, or silently promote candidates. Hosts own those actions and must record opaque references and explicit authority externally.

Existing Improvement Ledger proposal, evaluation, promotion, activation, and rollback APIs remain available. Existing 3.x stores remain readable.