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247 lines
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HTML
247 lines
21 KiB
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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 · 0e35f84ad5f2f9397d76ffacb99f9973544f08ac</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>
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<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>
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</section>
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<section id="s1"><h2><span class="sn">01</span>Introduction and Goals</h2>
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<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>
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<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>
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<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>
|
||
<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 – System/Top-Level</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>
|
||
<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>
|
||
<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>
|
||
</section><footer><span>state-hub-architecture · draft-3 · proposed</span><span>state-hub · docs/architecture/state-hub_v0.1.md · 0e35f84ad5f2f9397d76ffacb99f9973544f08ac</span></footer></main></div></div></html>
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