dtrentin 507753f82e init: scaffold Junction multi-protocol machine monitor (M1 walking skeleton)

Greenfield C# app reading industrial machine data over pluggable protocols.
M1 walking skeleton: MTConnect plugin polls a machine, Avalonia dashboard
shows live last datum. Build 0 warn/0 err on net48 + net8.0 (Linux),
115 unit tests + 2 docker-gated integration tests.

Projects:
- Junction.Domain (netstandard2.0): Result<T>, models, IProtocolDriver,
  IMachineRepository, plugin manifest. Zero package deps.
- Junction.Core (netstandard2.0): PollingEngine, PluginLoader
  (Assembly.LoadFrom), MachineMonitor, DI extensions.
- Junction.Persistence (netstandard2.0): SqliteMachineRepository (Dapper),
  schema, connection factory. Provider-swap seam to SQL Server.
- Junction.Protocols.MTConnect (netstandard2.0): HTTP driver + namespace-
  version-agnostic parser (MTConnect 1.7 + 2.0). Runtime plugin.
- Junction.App (net48;net8.0): Avalonia MVVM, live dashboard, NLog, DI root.
- Junction.Tests (net8.0): xUnit + Moq, 117 tests.
- mock/: docker-compose MTConnect agent (ladder99/agent).

Target net48 for Windows 7/8 fleet compatibility. Avalonia pinned 11.3.x.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-21 23:32:56 +02:00

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MTConnect Mock Agent

DEV MOCK only. Not prod. Local MTConnect agent + built-in VMC-3Axis simulator producing LIVE CHANGING data. For testing the MTConnect protocol driver.

Image: ladder99/agent:latest (C++ cppagent + simulator adapter on :7878).

Commands

docker compose up -d          # start agent (detached)
docker compose down           # stop + remove
docker compose logs -f agent  # follow logs

Agent serves on http://localhost:5000

Verify

curl http://localhost:5000/probe     # device model (MTConnectDevices XML)
curl http://localhost:5000/current   # latest value per data item (MTConnectStreams XML)
curl http://localhost:5000/sample     # historical observations from buffer (MTConnectStreams XML)

Endpoints

/probe — static device model. Devices, Components, DataItems. Device VMC-3Axis.
/current — snapshot: newest value + timestamp per DataItem. Poll repeatedly -> values change (Xact/Yact positions, SpindleSpeed, Execution, Line, Block).
/sample — stream of observations from ring buffer. Params: ?from=<seq>&count=<n>&path=<xpath>.

Proof live

Two /current calls ~3s apart: Position Xact 0.8996 -> -0.2139, Yact -1.1855 -> -1.4569, Line 263 -> 271. Simulator runs an NC program on loop.

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