Match the SciML/OrdinaryDiffEq.jl convention: the catch-all test group
is canonical Title-case All, not all-caps ALL. The sublib runtests.jl
gates compared TEST_GROUP against "ALL" while the default and the
test_groups.toml key are already canonical ("Core"). Align the gate
string casing so all group-name strings are consistent.

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

- TagBot.yml: adopt canonical OrdinaryDiffEq structure — top-level
  permissions block, workflow_dispatch.inputs.lookback default "3",
  named root TagBot job, and a TagBot-Subpackages matrix
  (fail-fast: false) over the three registered sublibraries, each
  invoking TagBot@v1 with subdir: lib/<package>.
- .gitignore: complete to canonical set (docs/build, LocalPreferences.toml,
  *.jl.*.mem, *.DS_Store, profile.pb.gz, .*.swp, .claude/, etc.).
- Casing: rename the special test group "nopre" -> "NoPre" on both
  sides of the workflow<->runtests contract (Tests.yml matrix.group +
  exclude, and runtests.jl GROUP comparison) so it is canonical
  Title-case and case-consistent.

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

…ors test dep

- Sublibrary READMEs: prepend the canonical OrdinaryDiffEq-style badge
  block (Zulip, Global Docs -> RecursiveArrayTools, ColPrac, SciML Code
  Style) and the "<Name>.jl is a component of the RecursiveArrayTools.jl
  monorepo. <role>. While completely independent and usable on its own,
  users wanting the full functionality should use RecursiveArrayTools.jl."
  wording, substituting names. Existing content preserved below.
- Project.toml: declare RecursiveArrayToolsShorthandConstructors as a
  proper test dependency — added to [extras], [targets].test, [compat]
  ("1"), and a [sources] path entry so the Core test group resolves it
  from the in-repo lib/ on Julia >= 1.11 (runtests.jl Pkg.develop
  fallback still covers Julia < 1.11 where [sources] is ignored).

Verified: project resolves and `VA[...]`/`AP[...]` from the sublibrary
load in a Core-test-like environment.

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

Move the inline Aqua quality-assurance test out of the main test
environment and into a dedicated test/qa/ project, matching the
canonical OrdinaryDiffEq sublib layout (lib/*/test/qa/).

- Add test/qa/Project.toml: Aqua + RecursiveArrayTools (via [sources])
  + Pkg + Test, with [compat] for each dep and julia.
- Move test/qa.jl -> test/qa/qa.jl (Aqua testset + the existing
  downstream-package manifest sentinel; behavior unchanged).
- runtests.jl: add activate_qa_env() and, in the Core/All branch,
  activate the qa env, run the QA safetestset, then restore the main
  test project so the remaining Core functional tests keep their full
  dependency set.
- Remove Aqua from the main Project.toml [extras], [targets].test, and
  [compat]; it now lives only in the qa env.

JET (NoPre group) is already isolated in test/nopre/ and is left as-is.
The three lib/* sublibraries run no QA today and are left untouched.

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

… downstream-only NLsolve

The branch had added RecursiveArrayToolsShorthandConstructors to the umbrella
root [sources]. It is a test-only dependency (the VA[]/AP[] shorthand tests),
not a dependency of the RecursiveArrayTools package itself, so sourcing it at
the package level makes Pkg.test add it to the Core test env as a declared
package dependency. Aqua.test_stale_deps then flags it as a stale dep of
RecursiveArrayTools (the module never imports it), failing the QA group.

master never had this [sources] entry: its runtests.jl Pkg.develops the
sublibrary into the test env directly, which the current runtests.jl still
does. Removing the [sources] entry restores master's green QA behavior
(verified: Core+QA Pkg.test now passes — Quality Assurance 9 pass / 1 broken
(expected ambiguities @test_broken) / 0 fail; previously 1 fail).

Also drop NLsolve from the main [extras]/[targets].test/[compat]: it is used
only by test/downstream/odesolve.jl and is already declared in
test/downstream/Project.toml, so it does not belong in the base test env.

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

…ject.tomls

Replace the root Tests.yml + bespoke GPU.yml with a single canonical CI.yml
(matching the OrdinaryDiffEq umbrella layout):

- CI.yml carries the version matrix for the root base groups
  (Core/SymbolicIndexingInterface/Downstream/NoPre on [lts, 1, pre], NoPre
  excluded on pre) via SciML/.github tests.yml@v1.
- The GPU tests become a dep-adding group on the self-hosted GPU runner: a
  dedicated CI.yml job passes group=GPU and
  runner=[self-hosted, Linux, X64, gpu] to tests.yml@v1 (which sets
  GROUP=GPU; runtests.jl then activates test/gpu and runs the GPU
  safetestsets). This reproduces the former GPU.yml (same runner labels,
  60-min timeout, src,ext coverage) so GPU.yml is deleted.

- Give the dep-adding root group Project.tomls the canonical
  [sources] = {path=../..} (+ sibling sublib paths) plus the package and Test
  deps so they resolve on Julia >= 1.11 against the PR-branch code:
  - test/gpu: add Adapt/ArrayInterface/RecursiveArrayTools/Test/Zygote +
    [sources] for the root and RecursiveArrayToolsArrayPartitionAnyAll.
  - test/nopre: add RecursiveArrayTools + [sources].
  - test/downstream: add Test + [sources] for root and
    RecursiveArrayToolsShorthandConstructors.

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

…olders)

Make the root test layout match the OrdinaryDiffEq canonical pattern: every
test lives in exactly one group, each group in its own capitalized test/<Group>/
folder, dep-adding groups have their own Project.toml (excluded from the light
main env), and the version matrix is consistent between CI and test_groups.toml.

- Split QA (Aqua) out of the Core branch into a standalone QA group keyed on
  GROUP == "QA" || GROUP == "All", running in its dep-adding test/QA env. Add a
  dedicated QA matrix row to CI.yml restricted to [lts, 1] (excluded on pre),
  so QA no longer runs inside the functional Core job.
- Normalize sublib test_groups.toml [Core] versions ["lts","1.11","1","pre"] ->
  ["lts","1","pre"] for all three sublibraries.
- Move the loose root Core test files into test/Core/, including the previously
  orphaned partitions_and_static_arrays.jl which was never wired into runtests
  and is now part of the Core group. Capitalize the remaining group folders
  (downstream->Downstream, gpu->GPU, nopre->NoPre, qa->QA) and route the
  SymbolicIndexingInterface and NoPre tests into their own group folders so all
  group folder names match their CI GROUP names.

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

QA is its own dep-adding test group (test/QA/Project.toml) and is run as
a separate CI matrix entry, so it should not also fire under the "All"
group. CI never runs "All", and a local "All" run should not pull the QA
tooling into the functional test pass.

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

Replace TagBot.yml with the canonical SciML/.github tagbot.yml@v1 thin
caller, plus a tagbot-subpackages matrix over the registered monorepo
sublibraries (RecursiveArrayToolsArrayPartitionAnyAll,
RecursiveArrayToolsRaggedArrays, RecursiveArrayToolsShorthandConstructors).

Drop hand-maintained skip lists and pinned julia-version floors from the
downgrade callers; the centralized workflow now auto-populates skip
(stdlibs union in-repo sublibs union caller package) and defaults to the
LTS floor.

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