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

[ChrisRackauckas-Claude]

Summary

Converts the root Tests.yml workflow to the canonical thin caller of the SciML reusable grouped-tests.yml@v1, with the package's group × version matrix declared once in a root test/test_groups.toml instead of being hand-maintained in YAML.

Changes

• .github/workflows/Tests.yml: the hand-written version × group matrix job is replaced with a thin caller:

  jobs:
    tests:
      uses: "SciML/.github/.github/workflows/grouped-tests.yml@v1"
      secrets: "inherit"

  on: and concurrency: are preserved verbatim. No with: overrides are needed: the package reads the default GROUP env var, check-bounds keeps its previous "yes" default, and coverage directories default to src,ext (both present).
• test/test_groups.toml (new, repo root): declares the matrix.
• test/runtests.jl: GROUP dispatch gains a dedicated QA branch and the Downstream branch is now reachable independently of Core (the previous elseif GROUP == "All" || ... made the All alternative dead code). The QA branch activates the isolated test/qa environment.
• test/qa/Project.toml + test/qa/qa.jl (new): isolated QA environment running Aqua.test_all(SciMLOperators) and JET.test_package(SciMLOperators; target_defined_modules = true).

Matrix match

The previous Tests.yml matrix was version: [1, lts, pre] × group: [Core, Downstream] = 6 jobs. The new test/test_groups.toml reproduces exactly that set and adds the new QA group:

Group	Versions	Status
Core	lts, 1, pre	unchanged
Downstream	lts, 1, pre	unchanged
QA	lts, 1	new

Verified statically by running compute_affected_sublibraries.jl . --root-matrix, which emits exactly Core×{lts,1,pre}, Downstream×{lts,1,pre}, QA×{lts,1} (all ubuntu-latest, Linux-only — no os field). All TOML/YAML/Julia files were confirmed to parse.

Notes

QA group is newly wired; Aqua/JET run in CI for the first time here. Any failures will be triaged in a follow-up — no exclusions were pre-added to qa.jl. This is a structural conversion only; Aqua/JET/tests were not run locally.

Ignore until reviewed by @ChrisRackauckas.

🤖 Generated with Claude Code