Decentralized Mesh Adaptation Distribution

Mechanism

The distribution mechanism replaces the registry-server model with a content-addressed, witness-signed peer protocol. An artifact in this context is a deployable unit of skill: a spatial-adaptation parameter pack, a policy bundle, or a composed module produced upstream by a credentialed authoring authority. Each artifact is identified by a deterministic content hash and accompanied by a manifest that declares the originating authority, the authoring credential chain, the declared composition surface, and the set of governance scopes under which the artifact may be admitted.

Distribution proceeds by request rather than by push. A receiving unit declares an intent — by artifact hash, by capability descriptor, or by named release channel — and the request is fanned out across the unit's current peer set. Any peer holding a copy of the requested artifact, together with a witness chain that satisfies the requester's admission policy, may answer. The answer carries the artifact bytes, the originating authoring signature, and an ordered sequence of witness signatures: each witness attesting that, at a stated time and under stated credentials, the witness held a byte-identical copy of the artifact.

The receiving unit performs structural validation independently of which peer served the bytes. It verifies the content hash, the originating authoring signature, the credential continuity of the witness chain, and the consistency of the declared scopes with the receiver's local governance context. The peer that served the bytes is not trusted by name; it is trusted only insofar as the chain it produced verifies. A unit may accept artifact bytes from an arbitrary peer — including a low-trust opportunistic relay — provided the chain reaches a credentialed origin acceptable under local policy.

Each successful admission produces a new lineage record that the receiver may itself sign and offer to subsequent peers, extending the witness chain. Over time the chain becomes a directed, append-only structure rooted at the original authoring authority and branching outward through every unit that has admitted, validated, and re-witnessed the artifact. Auditors can replay this structure offline, verifying that every byte served at every hop derives from an unbroken sequence of credentialed witnesses.

Operating Parameters

Operating parameters of the distribution layer are governance-declared rather than implementation-fixed. The minimum acceptable witness chain depth, the set of authorities recognized as valid origins, the maximum permissible age of a witness signature relative to wall-clock time, and the required diversity of witnesses (for example, requiring witnesses from at least two distinct credential issuers) are all expressed as policy parameters bound to the receiving unit's governance scope.

Pull cadence is also parameterized. Units may operate in eager mode, requesting newly published artifacts on a short polling interval, or in lazy mode, requesting only on demand at the moment a capability is invoked. Bandwidth-constrained deployments — disconnected platforms, intermittently linked field nodes — typically operate lazy, while well-connected aggregation nodes operate eager and serve as opportunistic caches for their bandwidth-poor neighbors. Cache eviction is governed by retention policy declared per artifact class, not by global LRU heuristics, so that artifacts subject to long-tail audit requirements remain locally retrievable for the policy-required interval.

Witness-chain admission policy is expressed as a structured predicate over the chain rather than a flat allow-list. Predicates may require, for instance, that the chain include at least one witness whose credential class is recognized by the receiver's jurisdictional authority, that the originating authoring credential remain in good standing as of the most recent governance-chain checkpoint visible to the receiver, and that no witness in the chain has been subsequently revoked. These predicates are evaluated locally; no external arbiter is consulted at distribution time.

Alternative Embodiments

Several embodiments of the distribution layer are contemplated. In one embodiment, the peer protocol runs over a gossip substrate in which each unit periodically announces a digest of locally held artifacts to a random subset of peers, and pull requests are routed by digest match. In a second embodiment, the protocol runs over a structured overlay in which artifact hashes are mapped to peer identifiers by consistent hashing, providing bounded lookup hops at the cost of more rigid topology. In a third embodiment, suitable for air-gapped or intermittently connected operation, distribution proceeds through physical media (signed removable storage), with the witness chain extended to record the human or device that performed the manual transfer.

Embodiments differ also in their handling of revocation. One embodiment treats revocation as a positive signal carried in the governance chain and propagated lazily: a unit becomes aware of revocation only when it next interacts with a peer holding the revocation record, and previously admitted artifacts continue to operate until the revocation reaches the unit. A second embodiment requires periodic re-attestation, in which an artifact already locally cached must be re-witnessed within a declared interval or it is considered stale and refused at next invocation. A third embodiment combines both, using lazy propagation for routine revocations and short re-attestation intervals for artifacts operating in elevated-risk scopes.

Composition with cross-model-portability is also an embodiment dimension. An artifact may be authored against a generic adaptation interface and witnessed across multiple model-family targets; the witness chain in that case records, per witness, which target the witness validated against. Receivers select the witness subchain matching their own runtime model family. This permits a single artifact identity to span heterogeneous fleets without forking the lineage record.

Composition With the Broader Architecture

The distribution primitive composes structurally with cross-model-portability, with the governance-chain admission gate, and with the dispute mechanism. Cross-model-portability ensures that an artifact authored once can be witnessed against multiple runtime targets, with the distribution layer carrying the per-target witness records. The governance-chain admission gate ensures that an artifact, once distributed, is admitted into downstream operation only if its lineage passes the same five-property evaluation applied to all observations entering the chain.

The dispute mechanism composes by treating distribution events as first-class disputable records. A receiver, an authoring authority, or a third-party auditor may raise a dispute against a specific witness signature — alleging, for example, that the signing credential was revoked at the time of signing, or that the bytes served did not match the declared hash. Dispute resolution proceeds under the same bilateral pair-settlement procedure used elsewhere in the architecture, producing a signed determination that itself enters lineage and is propagated through the same peer mechanism.

Distinction From Prior Art

The distribution layer is structurally distinct from container registries (Docker Hub and equivalents), language-package registries (npm, PyPI, crates.io), and machine-learning model registries (Hugging Face Hub and equivalents). Each of those systems centers on a registry server that is the authoritative source of truth: clients pull from the registry, mirrors are derivatives, and trust flows from the registry's TLS identity. Revocation, audit, and admission are all properties of the registry, not of the artifact.

The present mechanism inverts this relationship. There is no authoritative server; trust flows from the witness chain attached to the artifact itself, and any peer is structurally equivalent to any other for the purpose of serving bytes. Audit is a property of the artifact's lineage, replayable offline. Revocation is carried in the governance chain and propagated by the same peer mechanism as the artifacts. Content-addressed peer protocols such as IPFS provide content addressing but not credentialed witness chains; signed-package mechanisms such as Sigstore provide author attestation but presume a centralized transparency log; neither provides the structured, governance-bound, multi-witness lineage described here.

Operational Considerations

In practice the distribution layer must accommodate the harsh asymmetries of real deployment topologies. Field units may have intermittent connectivity, episodic high-bandwidth windows, and adversarial network conditions; aggregation nodes near data-rich operating centers may have continuous, well-provisioned links. The protocol does not assume uniform connectivity. A unit may opportunistically extend its peer set during a high-bandwidth window, prefetch artifacts that local policy declares likely to be needed, and witness-sign each prefetched artifact under its own credential before going dark. On reconnection, the unit serves both as consumer of any newer artifacts and as origin for artifacts it had previously prefetched and locally validated, contributing back into the mesh without dependency on any central server.

Failure modes are worth enumerating. A peer may serve correct bytes with a stale chain; the receiver detects this through the chain predicate and refuses admission while still retaining the bytes for later re-attestation against an updated chain. A peer may serve incorrect bytes; the content-hash check fails immediately and the peer is recorded as having served a mismatch, with the record entering lineage and contributing to that peer's local trust standing. A peer may withhold artifacts it possesses; this is structurally indistinguishable from absence and is handled by routing the request to additional peers. None of these failure modes require central intervention, and each is observable in the lineage record after the fact.

Disclosure Scope

This disclosure covers the peer pull protocol, the witness-chain data structure, the governance-bound admission predicate, the policy parameters that govern pull cadence and chain depth, the operational considerations governing intermittent connectivity and failure-mode handling, and the composition of the distribution primitive with cross-model-portability, with the governance chain, and with the dispute mechanism. Equivalents, including alternative overlay topologies, alternative revocation propagation strategies, and alternative physical-media embodiments, are within scope. Implementations that omit the witness chain, that rely on a single distribution server, or that do not bind admission to governance-credentialed predicates fall outside the disclosed mechanism.