shard-wiki/registry/capabilities/capability.wiki.federation-models.md

id, name, summary, owner, status, domain, tags, maturity, external_evidence, discovery, availability, relations, evidence, consumer_guidance

id	name	summary	owner	status	domain	tags	maturity	external_evidence	discovery	availability	relations	evidence	consumer_guidance
capability.wiki.federation-models	Selectable Federation-Model Taxonomy	Federation as a plural, composable coordination axis (fork+journal, VCS-replication+ping, query-time graph-join, feed, activity-streams, engine-mirror) selected per space.	shard-wiki	draft	helix_forge	wiki federation taxonomy composable shard-wiki	discovery availability current target confidence rationale D4 D6 high A six-model taxonomy distilled from a ~23-system synthesis, each model anchored in a real system, with capability prerequisites and per-space/per-shard composition rules. current target confidence rationale A0 A4 low Designed and specified (FederationArchitecture T17) but not implemented; informational reuse only today.	completeness reliability level name confidence basis satisfied_expectations broken_expectations out_of_scope_expectations C1 Sparse low scope_vs_intent_and_consumer_expectations the model taxonomy and selection/composition rules are documented no federation transport is implemented yet mandating a single federation mechanism level confidence basis known_reliability_risks R0 low consumer_quality_signals design-stage; no runtime evidence	intent includes excludes use_cases Treat federation as selectable and composable rather than one mechanism, so each space picks fork+journal, VCS-replication, query-join, feed, activity-streams, or engine-mirror. the six federation models + their capability floors per-space selection and per-shard composition imposing one homogeneous federation network shard-wiki UseCaseCatalog UC-26, UC-31, UC-33, UC-71, UC-72, UC-74, UC-79	current_level target_level current_artifacts consumption_modes A0 A4 shard-wiki/spec/FederationArchitecture.md (T17) informational	depends_on capability.wiki.shard-orchestration capability.wiki.coordination-journal	documentation shard-wiki/spec/FederationArchitecture.md shard-wiki/research/260614-shard-spectrum-synthesis/findings.md	recommended_for not_recommended_for known_limitations planning a federation strategy that mixes models per source implementation reuse today (design-stage) no transport implemented; informational planning reuse only

Selectable Federation-Model Taxonomy

Federation is plural and composable: fork+journal (Federated Wiki), VCS-replication+ping (ikiwiki), query-time graph-join (Wikibase SERVICE), feed aggregation, activity streams (ActivityPub), and engine-mirror (Wiki.js). A space selects a model and composes per shard; the default is fork+journal over git. Design-stage capability — strong for planning reuse.

Assessment notes

Discovery

FederationArchitecture T17, distilled from the shard-spectrum synthesis (v3).

Availability

Specified, not implemented — informational reuse only.