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CephalonEngine

0.2.0-preview · planned

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The next preview track. Lands with the first managed migration story plus the dedicated reference / architecture sub-pages that are currently mirrored from engine source docs.

Status: planned. Tracked on the Roadmap and Backlog.

Planned highlights

Section titled “Planned highlights”

Migration tooling

Section titled “Migration tooling”
  • cephalon migrate FROM TO — automated schema / config migration runner. The FROM / TO placeholders accept any release-track version (e.g. cephalon migrate 0.1.0-preview.42 0.2.0-preview.0).
  • Auto-generated migration reports per upgrade.
  • Backwards-compatibility layer for one minor (0.1 → 0.2 stays composable during transition).

Reference / architecture deep-dives

Section titled “Reference / architecture deep-dives”

Currently the Reference → Architecture index points at source-doc mirrors for these topics. They graduate to dedicated, freshly-written reference pages:

  • Transport surface — typed contract per transport (REST, JSON-RPC, gRPC, GraphQL, SSE, WebSocket).
  • Identity contract — principal model, scope/role decisions, claim contracts.
  • Tenancy contract — tenant context, resolution policy, governance model.
  • CDC capture — ICdcCaptureContributor, freshness / lag / publication status.
  • Design patterns — canonical patterns the engine relies on internally.
  • REST endpoint authoring strategy — opinionated authoring strategy for REST behaviors.
  • .NET ecosystem reference — pinned-version inventory.
  • Package discovery — assembly scanning + module-discovery rules.

Operations sub-tree

Section titled “Operations sub-tree”

/guide/operations/ graduates from a single page to a sub-tree:

  • /guide/operations/production-readiness/
  • /guide/operations/observability/
  • /guide/operations/runtime-failure-policy/
  • /guide/operations/deployment-mode/

Identity tokens tutorial

Section titled “Identity tokens tutorial”

New Tutorial → Identity tokens — service-to-service auth between Cephalon hosts.

Error-handling page

Section titled “Error-handling page”

New /reference/configuration/error-handling/ documenting the ProblemDetails shape, exception mapping, and validation contract.

Per-feature templates

Section titled “Per-feature templates”

Cephalon.TemplatePack expands beyond cephalon-app:

  • cephalon-module — scaffold a single module library.
  • cephalon-behavior — scaffold a single behavior + test.
  • cephalon-suite — scaffold a microservice suite layout.

.NET 11 graduation

Section titled “.NET 11 graduation”

Currently assessment-only. 0.2.0-preview targets either:

  • Multi-target net10.0;net11.0 if .NET 11 is GA and stable by then.
  • Or hold at net10.0 and ship a dedicated 0.2.x-net11 track once .NET 11 LTS lands.

Decision lands once .NET 11 RC2 posture is clear (track in Migration → .NET versions).

Breaking changes (planned)

Section titled “Breaking changes (planned)”

Tracked individually as they land. As of this writing, the surface targeted for breakage:

SurfaceBreakageJustification
Engine:Architecture:Schema (planned key)Adding required Mode fieldCapability negotiation matures from “infer from manifest” to “explicit”
IModule.Describe() return shapeAdding RequiredVersion fieldMigration tooling needs explicit version dependency

Each item ships a migration recipe in Migration → Breaking changes.

How this page evolves

Section titled “How this page evolves”

This page is a planning surface — items move between planned, in-progress, shipped, deferred as the milestone progresses.

When 0.2.0-preview.0 actually ships, this page is rewritten to mirror the shape of 0.1.0-preview (highlights + maturity surface + upgrade notes + limits).

Where to go next

Section titled “Where to go next”