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Extend `SciMLBase` compat to include v3.1 (keep the existing lower bound and v2 support). No code changes required — no references to the SciMLBase v3 breaking surface (`u_modified!`, removed `DEProblem` type alias, 3-arg ensemble `prob_func`, single-int non-scalar timeseries `sol[i]`, or removed getproperty aliases like `.destats` / `.minimizer`). Note: local tests cannot be run because `Pkg.resolve()` fails for any env that contains SciMLBase 3.1 — OrdinaryDiffEq in the registry still pins `RecursiveArrayTools ≤ 3.54` while SciMLBase 3.1 requires RAT v4. CI on this PR will reproduce the same resolution error until upstream OrdinaryDiffEq releases a RAT-v4-compatible version. Re-running CI afterward should go green without further edits. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
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Summary
Courtesy PR for the SciMLBase v3 release.
Extend
SciMLBasecompat to include v3.1 (keep the existing lower bound and v2 support). No code changes required — a grep ofsrc/andtest/found no references to the SciMLBase v3 breaking surface (u_modified!, removedDEProblemtype alias, 3-arg ensembleprob_func, single-int non-scalar timeseriessol[i]indexing, or removed getproperty aliases like.destats/.minimizer).Known limitation
Local tests cannot be run:
Pkg.resolve()fails on any env containing SciMLBase 3.1 becauseOrdinaryDiffEqin the registry still pinsRecursiveArrayTools ≤ 3.54while SciMLBase 3.1 requires RAT v4. Expect CI on this PR to fail at thePkg.addstep with an unsatisfiable resolution error until upstream OrdinaryDiffEq releases a RAT-v4-compatible version; re-running afterward should go green without further edits.Context
Part of the SciMLBase v3 ecosystem sweep — see SciML/DiffEqCallbacks.jl#300 and SciML/DiffEqParamEstim.jl#290 for the reference patterns for code-side changes.
cc @ChrisRackauckas
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