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< title > State Hub architecture< / title >
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< div class = "wrap" > < header > < div class = "eyebrow" > < span > state-hub-architecture< / span > < span class = "stat" > proposed · draft-3< / span > < span > state-hub< / span > < span > reviewed 2026-08-31< / span > < span > generated from canonical source — do not edit< / span > < / div > < h1 > State Hub architecture< / h1 > < p class = "sub" > Source: < code > state-hub · docs/architecture/state-hub_v0.1.md · 803bb95e1d071f188f4202d53a235f8721a8ecdc< / code > < / p > < p class = "sub" > Review due: 2027-02-28< / p > < / header > < div class = "layout" > < nav class = "rail" aria-label = "Sections" > < ol > < li > < a href = "#about-this-document" > < span class = "n" > ·< / span > About this document< / a > < / li > < li > < a href = "#s1" > < span class = "n" > 1< / span > Introduction and Goals< / a > < / li > < li > < a href = "#s2" > < span class = "n" > 2< / span > Architecture Constraints< / a > < / li > < li > < a href = "#s3" > < span class = "n" > 3< / span > System Scope and Context< / a > < / li > < li > < a href = "#s4" > < span class = "n" > 4< / span > Solution Strategy< / a > < / li > < li > < a href = "#s5" > < span class = "n" > 5< / span > Building Block View< / a > < / li > < li > < a href = "#s6" > < span class = "n" > 6< / span > Runtime View< / a > < / li > < li > < a href = "#s7" > < span class = "n" > 7< / span > Deployment View< / a > < / li > < li > < a href = "#s8" > < span class = "n" > 8< / span > Cross-Cutting Concepts< / a > < / li > < li > < a href = "#s9" > < span class = "n" > 9< / span > Architecture Decisions< / a > < / li > < li > < a href = "#s10" > < span class = "n" > 10< / span > Quality Requirements< / a > < / li > < li > < a href = "#s11" > < span class = "n" > 11< / span > Risks and Technical Debt< / a > < / li > < li > < a href = "#s12" > < span class = "n" > 12< / span > Glossary< / a > < / li > < / ol > < / nav > < main > < section id = "about-this-document" > < h2 > About this document< / h2 >
2026-08-18 22:36:39 +02:00
< p > First-wave arc42 for State Hub, the estate's live coordination read-model. This service is in active retirement planning; new permanent ownership should not land here. Chapter 9 points at the estate ADRs that still bind it.< / p >
< / section >
< section id = "s1" > < h2 > < span class = "sn" > 01< / span > Introduction and Goals< / h2 >
< p > State Hub is a queryable, auditable memory of work: domains, repos, workplans, tasks, decisions, progress. Files remain the origin. The hub is derived state (custodian ADR-001, ADR-003).< / p >
< p > It remains operational until retirement gates in < code > prj-state-hub-retirement< / code > are met. Replacement ownership is moving toward < code > repo-manager< / code > and < code > hub-core< / code > .< / p >
< h3 > 1.1 Requirements Overview< / h3 >
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< ul > < li > Rebuild coordination state from registered repository files.< / li > < li > Deterministic UUIDv5 work-record identifiers (ADR-007). Any instance may reconcile the same repository; the canonical record id produces the same database key and writeback bytes on every instance.< / li > < li > Preserve compatibility; do not take new permanent architectural ownership.< / li > < / ul >
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< h3 > 1.2 Quality Goals< / h3 >
< ol > < li > Rebuildability from git.< / li > < li > Hub never becomes the origin of work.< / li > < li > Extraction paths stay open.< / li > < / ol >
< h3 > 1.3 Stakeholders< / h3 >
< div class = "scroll" > < table > < thead > < tr > < th > Role< / th > < th > Concern< / th > < / tr > < / thead > < tbody > < tr > < td > state-hub< / td > < td > Live read-model during retirement.< / td > < / tr > < tr > < td > the-custodian< / td > < td > Estate rules the hub must not invert.< / td > < / tr > < tr > < td > repo-manager< / td > < td > Incoming consistency / repo representation.< / td > < / tr > < tr > < td > product repos< / td > < td > Workplan files the hub indexes.< / td > < / tr > < / tbody > < / table > < / div >
< / section >
< section id = "s2" > < h2 > < span class = "sn" > 02< / span > Architecture Constraints< / h2 >
< p > N/A for this stub — retirement program is the binding constraint.< / p >
< / section >
< section id = "s3" > < h2 > < span class = "sn" > 03< / span > System Scope and Context< / h2 >
< p > < strong > In:< / strong > indexing workplans/tasks/decisions, consistency rebuild, query API and dashboard used today. < strong > Out:< / strong > being the source of work items; new cross-domain capabilities; publication of policy (policy-nexus).< / p >
< h3 > 3.1 Business Context< / h3 >
< p > Files are excellent for canon and provenance. The estate still needs a live query surface while retirement proceeds.< / p >
< h3 > 3.2 Technical Context< / h3 >
< p > Inputs: workplan markdown via < code > fix-consistency< / code > . Outputs: HTTP/MCP APIs. Neighbours: every registered repo, activity-core (ops runs), policy-nexus (does not index the hub).< / p >
< / section >
< section id = "s4" > < h2 > < span class = "sn" > 04< / span > Solution Strategy< / h2 >
< p > N/A for this stub. The strategy is already in the estate ADRs: files first, materialized derived state, single registrar, local cache vs authority (ADR-010, proposed).< / p >
< / section >
< section id = "s5" > < h2 > < span class = "sn" > 05< / span > Building Block View< / h2 >
< h3 > 5.1 Level 1 – < / h3 >
< p > N/A for this stub.< / p >
< / section >
< section id = "s6" > < h2 > < span class = "sn" > 06< / span > Runtime View< / h2 >
< p > N/A for this stub.< / p >
< / section >
< section id = "s7" > < h2 > < span class = "sn" > 07< / span > Deployment View< / h2 >
< p > N/A for this stub.< / p >
< / section >
< section id = "s8" > < h2 > < span class = "sn" > 08< / span > Cross-Cutting Concepts< / h2 >
< p > N/A for this stub.< / p >
< / section >
< section id = "s9" > < h2 > < span class = "sn" > 09< / span > Architecture Decisions< / h2 >
2026-08-31 21:34:23 +02:00
< p > Estate-wide binding decisions live in the-custodian and are listed on the estate map. Service-local implementation decisions live in < code > docs/adr/< / code > and do not supersede the estate decisions:< / p >
< div class = "scroll" > < table > < thead > < tr > < th > Estate ADR< / th > < th > Status< / th > < th > Why it binds this system< / th > < / tr > < / thead > < tbody > < tr > < td > < code > CUST-ADR-001< / code > < / td > < td > accepted< / td > < td > File-backed work originates in repositories; the Hub projects it. Published < code > /adr/custodian-workplans-as-repo-artefacts/v1/< / code > .< / td > < / tr > < tr > < td > < code > CUST-ADR-003< / code > < / td > < td > accepted< / td > < td > How derived state invalidates; ADR-012 supplies commit provenance.< / td > < / tr > < tr > < td > < code > CUST-ADR-007< / code > < / td > < td > accepted< / td > < td > Namespace-aware identity and deterministic work-record UUIDs.< / td > < / tr > < tr > < td > < code > CUST-ADR-010< / code > < / td > < td > proposed< / td > < td > Two kinds of hub data.< / td > < / tr > < tr > < td > < code > CUST-ADR-011< / code > < / td > < td > proposed< / td > < td > Namespace and reconciliation limits.< / td > < / tr > < tr > < td > < code > CUST-ADR-012< / code > < / td > < td > accepted< / td > < td > Forge projection baseline and preliminary overlays.< / td > < / tr > < / tbody > < / table > < / div >
< div class = "scroll" > < table > < thead > < tr > < th > Local ADR< / th > < th > Status< / th > < th > Scope< / th > < / tr > < / thead > < tbody > < tr > < td > < code > STATE-ADR-001< / code > < / td > < td > accepted< / td > < td > Repository identity and recovery contract for canonical-name changes.< / td > < / tr > < / tbody > < / table > < / div >
2026-08-18 22:36:39 +02:00
< p > Do not treat a State Hub < code > /decisions< / code > row as the published ADR.< / p >
< / section >
< section id = "s10" > < h2 > < span class = "sn" > 10< / span > Quality Requirements< / h2 >
< p > N/A for this stub.< / p >
< / section >
< section id = "s11" > < h2 > < span class = "sn" > 11< / span > Risks and Technical Debt< / h2 >
< p > N/A for this stub. Residual: this workstation cannot mint registrar UUIDs.< / p >
< / section >
< section id = "s12" > < h2 > < span class = "sn" > 12< / span > Glossary< / h2 >
< div class = "scroll" > < table > < thead > < tr > < th > Term< / th > < th > Meaning< / th > < / tr > < / thead > < tbody > < tr > < td > Read model< / td > < td > Derived index; never the origin.< / td > < / tr > < tr > < td > Registrar< / td > < td > The single instance allowed to mint workplan UUIDs.< / td > < / tr > < tr > < td > Retirement< / td > < td > Coordinated move of capabilities out of this repo.< / td > < / tr > < / tbody > < / table > < / div >
2026-09-01 01:56:46 +02:00
< / section > < footer > < span > state-hub-architecture · draft-3 · proposed< / span > < span > state-hub · docs/architecture/state-hub_v0.1.md · 803bb95e1d071f188f4202d53a235f8721a8ecdc< / span > < / footer > < / main > < / div > < / div > < / html >
