# Description
Add a generic, company-neutral recycling simulation sample and reusable
plastics/rubber companion-model packages. One durable causal coordinator
and ten separately launched OPC UA process views provide deterministic
material balances, finite buffers, genealogy, utilities, quality
holds/disposition, authenticated controls and crash recovery. Process
views consume committed state instead of running independent
simulations.
Real companion-model equipment instances use DI/Machinery/AMB discovery,
Machine Vision, Pumps/Scales, granulate drying, extrusion, filtration
and pelletizing. Vendor/process extensions remain sample-local.
Connectors and WoT conversion are out of scope. **External
source-contract parity and complete deployment qualification are not
claimed complete.**
The sample and managed tests target **.NET 8, 9 and 10**. The
consolidated [recycling guide](samples/Recycling/README.md) explains the
actual composition, simulation, observation paths and exposed data; the
application-directory README points to that guide.
Typed client member extensions are emitted at build time through the
default-false `ModelSourceGeneratorClientAccessorsOnly` opt-in.
Extrusion uses it for all twelve parts instead of checked-in generated
C# and a Python generator. The shared client runtime retains typed
values, quality, timestamps and streaming behavior.
### Package layout
Six packages contain fourteen models in two model-producing assemblies:
| Specifications | Model | Typed client | Server runtime |
| --- | --- | --- | --- |
| OPC 40083 and OPC 40082-6 | `Opc.Ua.PlasticsRubber` |
`Opc.Ua.PlasticsRubber.Client` | `Opc.Ua.PlasticsRubber.Server` |
| OPC 40084 parts 1–12 | `Opc.Ua.Extrusion` | `Opc.Ua.Extrusion.Client`
| `Opc.Ua.Extrusion.Server` |
NuGet IDs use the `OPCFoundation.NetStandard.` prefix. All six packages
are registered in `.azurepipelines/expected-packages.txt` and the
generated preview-pack solution. Granulate-drying code lives in
`GranulateDrying` folders in the PlasticsRubber projects; extrusion uses
per-part folders. There are no standalone granulate-drying or per-part
extrusion packages. Published model identities and CLR namespaces remain
distinct and unchanged.
The common 1.03 interface is independently authored on the explicitly
MIT-licensed 1.02 implementation basis; the official 1.03 XML is not
redistributed. The other imported models retain their individual MIT
notices. All 42 pinned model, identifier and basis files retain their
manifest-backed bytes, including their staged Git blobs. No formal
companion certification is claimed; the disputed Filter profile is not
advertised.
## Related Issues
No tracking issue is currently linked.
## Checklist
_Put an `x` in the boxes that apply. You can complete these step by step
after opening the PR._
- [ ] I have signed the
[CLA](https://opcfoundation.org/license/cla/ContributorLicenseAgreementv1.0.pdf)
and read the
[CONTRIBUTING](https://github.com/OPCFoundation/UA-.NETStandard/blob/master/CONTRIBUTING.md)
doc.
- [ ] I have added tests that prove my fix is effective or that my
feature works and increased code coverage.
- [x] I have added all necessary documentation.
- [x] I have verified that my changes do not introduce (new) build or
analyzer warnings.
- [ ] I ran **all** tests locally using the **UA.slnx** solution against
at least .net **framework** and .net **10**, and all passed.
- [ ] I fixed **all** failing and flaky tests in the CI pipelines and
**all** CodeQL warnings.
- [x] I have addressed **all** PR feedback received.
Current-head CI and coverage remain pending; the full local `UA.slnx`
test matrix is not claimed complete.
Marc Schier