Files
OpenNest-Engines/README.md
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ajandClaude Opus 5.5 90f07603e2 feat(qwen38flashnext): add the finished engine
Qwen3.8-Flash-Next's final version after a 14.5-hour optimization run
(its commit 7d7fca3): cost-first sheet trials, largest-area-first
demand order, and a cached-triangulation exact gate that brought a
219-part production job from timeout to ~106 s. 13/13 tests pass
against OpenNest master.

README cleaned for publishing: the model-facing template rules are
replaced by a one-line independence statement, the production job is
described generically instead of by its PEP job/file name (also in a
JobSolver comment), results show both sheet pools as re-measured here
(the 9-size claim in its report didn't reproduce: it grabs 96x240 and
under-fills them), and the stale StockLadder-crash note is gone now
that core leaves etch marks out of nesting.

Also drops a stale Aurora plugin reference from Opus55's README and
lists the engine in the repo README.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 06:57:11 -04:00

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2.2 KiB
Markdown

# OpenNest Engines
Independent nesting engine plugins for [OpenNest](https://git.thecozycat.net/aj/OpenNest).
Each engine is a standalone class library that OpenNest discovers at runtime via
`NestingEngineRegistry.LoadPlugins()` — drop the DLL into an `Engines/` folder next to
the OpenNest app or `OpenNest.Benchmark` build output.
| Engine | Approach |
|--------|----------|
| [Gpt6Astra](OpenNest.Engine.Gpt6Astra/) | Contact-based placement |
| [Opus55](OpenNest.Engine.Opus55/) | Frontier-advance no-fit-polygon packing |
| [Qwen38FlashNext](OpenNest.Engine.Qwen38FlashNext/) | Bottom-left greedy insertion over convex NFPs with an exact clearance gate |
## Building
Engines compile against an OpenNest checkout, expected as a sibling clone:
```
src/
OpenNest/ git clone https://git.thecozycat.net/aj/OpenNest.git
OpenNest-Engines/ this repo
```
Use a different location with `/p:OpenNestRoot=<path>` (or the `OpenNestRoot`
environment variable).
```powershell
./Build-Engines.ps1 # build all engines + deploy to the benchmark
./Build-Engines.ps1 -Engines Opus55 # just one
dotnet test OpenNest.Engine.Opus55/tests/OpenNest.Engine.Opus55.Tests.csproj
```
Each engine's README covers its algorithm and benchmark results.
## Writing a new engine
```powershell
./New-Engine.ps1 -Name Nova
```
This copies `_Template/` to `OpenNest.Engine.Nova/`: an `INestingEngine` stub, a README
spelling out what counts as an independent engine, `BENCH-RULES.md` (how a model's run
works: workspace limits, git, the real-part archive, reporting), and starter acceptance tests checked by
the benchmark's own `NestValidator` (they fail until `Solve()` is implemented).
To work inside an OpenNest checkout instead, stamp it into an `Engines/` folder there and
bring the shared build files along; they detect that layout automatically:
```powershell
./New-Engine.ps1 -Name Nova -Destination <OpenNest>/Engines -IncludeBuildFiles
```
## Layout
Each engine lives in `OpenNest.Engine.<Name>/` with an optional `tests/` subproject.
`Directory.Build.props` supplies the target framework and the `OpenNest.Engine`
reference, so an engine's `.csproj` can be nearly empty.