Canonical CI: grouped-tests.yml + root test/test_groups.toml

[ChrisRackauckas-Claude]

Summary

Converts the root Tests.yml matrix test job into a thin caller of the canonical SciML/.github/.github/workflows/grouped-tests.yml@v1 reusable workflow, with the group × version (× os) matrix now declared once in test/test_groups.toml.

• Tests.yml: the old version {1, lts, pre} × os {ubuntu, macos, windows} matrix job is replaced by the thin grouped-tests.yml@v1 caller. on: and concurrency: are preserved verbatim; filename and name: unchanged. No with: overrides needed — the repo reads GROUP (default), uses default check-bounds, and default coverage dirs (src,ext).
• test/test_groups.toml (new):
  • [Core] on ["lts", "1", "pre"] × ["ubuntu-latest", "macos-latest", "windows-latest"] — reproduces the old functional matrix exactly.
  • [QA] on ["lts", "1"] (ubuntu).

Category B refactor (inline Aqua → isolated QA group)

Aqua had been running inline under GROUP=="All"/"Core" (via test/qa.jl). It is now moved into an isolated QA group gated on GROUP=="QA":

• test/qa/Project.toml (new): Aqua + JET + Test, package via [sources] path = "../..", [compat] julia = "1.10".
• test/qa/qa.jl (new): the Aqua checks plus the previously-unwired JET report_call checks (consolidated from test/jet/jet.jl).
• runtests.jl: basictests.jl stays under GROUP Core/All; a new GROUP=="QA" branch activates test/qa, develops the package, instantiates, and includes qa/qa.jl. (GPU branch unchanged.)
• Removed the old test/qa.jl and test/jet/ (JET now lives in the QA env).

GPU.yml (self-hosted), Downstream.yml, Downgrade.yml, Documentation.yml, and the other workflows are left untouched.

Matrix match (static verification)

compute_affected_sublibraries.jl . --root-matrix (run against SciML/.github@v1) emits:

• Core: 9 cells = {lts, 1, pre} × {ubuntu-latest, macos-latest, windows-latest} — a 1:1 reproduction of the old Tests.yml functional matrix.
• QA: 2 cells = {lts, 1} on ubuntu-latest.

All touched TOML and YAML files parse cleanly. Tests/Aqua/JET were not run locally (structural conversion only).

QA group newly wired; Aqua/JET run in CI — any failures will be triaged in a follow-up.

Project.toml metadata: [compat] julia is already "1.10" (LTS floor) and every [extras] dependency already has a [compat] entry, so no metadata fixes were required.

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Ignore until reviewed by @ChrisRackauckas.

🤖 Generated with Claude Code

[ChrisRackauckas-Claude]

Pushed 93c032e with two fixes to the conversion:

1. Deleted .github/workflows/GPU.yml. The [GPU] group in test/test_groups.toml already runs the CUDA tests via the grouped-tests workflow on the same [self-hosted, Linux, X64, gpu] runner, so keeping the standalone workflow ran the GPU tests twice per CI event. Per the GPU-as-group convention, the group supersedes the workflow.

2. Added macOS-15-intel to Core's os array. The old functional matrix ran Julia 1 on macOS-15-intel (x64 mac), but the conversion's [ubuntu-latest, macos-latest, windows-latest] list dropped that cell. Note this is a slight expansion: the group matrix runs all of lts/1/pre on the Intel mac rather than just 1 — acceptable, and it gives x64-mac coverage across all tested Julia versions.

Static verification (compute_affected_sublibraries.jl --root-matrix from SciML/.github@v1): Core = 12 cells (lts/1/pre x ubuntu-latest/macos-latest/windows-latest/macOS-15-intel), GPU = exactly 1 cell on ["self-hosted","Linux","X64","gpu"] with timeout 60, QA = 2 cells (lts/1 on ubuntu-latest).

[ChrisRackauckas-Claude]

Added the SciMLTesting v1.2 folder-based run_tests harness on top of this grouped-tests conversion; merges as one PR (grouped-tests + SciMLTesting v1.2).