docs: publish legacy feature catalogue

2026-09-03 08:14:14 +00:00
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+---
+title: "3DARCH-FT-6 — Repeatable database schema lifecycle"
+description: "Enable service developers and operators to evolve and apply the workplace persistence schema consistently across fresh workspaces and deployed instances."
+---
+
+# Repeatable database schema lifecycle
+
+| Feature | Parent Epic | Delivery status | Status source | Owner | Approved for Solution |
+|---|---|---|---|---|---|
+| `3DARCH-FT-6` | [3DARCH-EP-1 — Engineering Platform, Quality, and Operability](../../3darch-ep-1.md) | `IN_BACKLOG` | `EXACT` | 3D Architecture Wizzard team | No |
+
+## Description
+
+Enable service developers and operators to evolve and apply the workplace persistence schema consistently across fresh workspaces and deployed instances.
+
+## User or operator problem
+
+Service teams need database changes to be ordered, repeatable, and compatible across local and deployed environments.
+
+## Expected value
+
+Reduces schema drift and makes migration failure visible before the service accepts traffic.
+
+## Scope
+
+Includes the Prisma schema, ordered migrations, client generation, development migration workflow, and production migration gate.
+
+### Exclusions
+
+- End-user product behavior and solution or release authorization are outside these engineering Features.
+
+## Acceptance outcomes
+
+- [ ] The database contract is versioned in one Prisma schema.
+- [ ] Ordered migrations create and evolve user, settings, scene, and seat data.
+- [ ] Local service workflows generate the Prisma client and apply development migrations.
+- [ ] Production startup applies pending migrations before accepting traffic and exposes migration failure.
+
+## Dependencies
+
+- [3DARCH-FT-1 — Reproducible monorepo development workspace](./3darch-ft-1.md)
+
+## Risks
+
+- Migration failure can block service startup or leave persistence incompatible with application code.
+
+## Human approval
+
+Linas approved this Feature for documentation on 2026-09-02T10:40:43.220Z. It is **not Approved for Solution** and has no implementation approval.
+
+- [Documentation decision](https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201)
+
+## Delivery status evidence
+
+The Feature was separately registered at `IN_BACKLOG` as an accepted catalogue boundary. This records backlog retention, not design or delivery progress.
+
+- Event: Catalogue registration
+- Actor and authority: Linas — Human project team member
+- Reason: The Feature catalogue was accepted for governed documentation and retained in the backlog.
+- [Status evidence](https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201)
+
+## Architecture traceability
+
+- Requirements: none derived.
+- Readiness: Not started.
+
+Architecture solution work must not begin until a separate human **Approved for Solution** decision is recorded.
+
+## Tasks
+
+[Review the Tasks group](./3darch-ft-6/tasks.md). No canonical implementation Tasks have been defined.
+
+## Original source
+
+- [Discord – Scope – Linas: original Feature request](https://discord.com/channels/1518726359512387766/1543925247361814568/1544647879111483562)
+- [Discord – Scope – Linas: proceed with documented mapping](https://discord.com/channels/1518726359512387766/1543925247361814568/1544658325738885201)
+
+### Legacy implementation evidence
+
+The Feature boundary was mined from legacy revision `c0ced47ecaf4426f47e5c2e4868677f7144b951a`.
+
+- [`apps/singularity/prisma/schema.prisma`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/prisma/schema.prisma)
+- [`apps/singularity/prisma/migrations/`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/prisma/migrations/)
+- [`apps/singularity/package.json`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/package.json)
+- [`apps/singularity/Dockerfile`](https://gitea.lego-cloud.eu/corp-v1-3darch-legacy/corp-v1-3darch-legacy/src/commit/c0ced47ecaf4426f47e5c2e4868677f7144b951a/apps/singularity/Dockerfile)