Roll back ManOpt and Manifold related changes

- Revert OptimizationManopt compat entries (Manifolds 0.10→0.9.18, Manopt 0.5→0.4.63)
- Revert OptimizationManopt source code API changes
- Remove Manifolds, Manopt, and OptimizationManopt from main Project.toml
- Keep other version bumps: Optim, Optimisers, PrecompileTools

This allows the other compat helper PRs to proceed while ManOpt needs more work.

Author: claude

Project.toml

@@ -40,14 +40,11 @@ LinearAlgebra = "1.10"
 Logging = "1.10"
 LoggingExtras = "0.4, 1"
 Lux = "1.12.4"
-Manifolds = "0.10"
-Manopt = "0.5"
 MLUtils = "0.4"
 ModelingToolkit = "9"
 Optim = "1"
 Optimisers = "0.3, 0.4"
 OptimizationBase = "2"
-OptimizationManopt = "0.1"
 OptimizationMOI = "0.5"
 OptimizationOptimJL = "0.4"
 OptimizationOptimisers = "0.3"
@@ -83,11 +80,8 @@ ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
 Ipopt = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
 IterTools = "c8e1da08-722c-5040-9ed9-7db0dc04731e"
 Lux = "b2108857-7c20-44ae-9111-449ecde12c47"
-Manifolds = "1cead3c2-87b3-11e9-0ccd-23c62b72b94e"
-Manopt = "0fc0a36d-df90-57f3-8f93-d78a9fc72bb5"
 MLUtils = "f1d291b0-491e-4a28-83b9-f70985020b54"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
-OptimizationManopt = "e57b7fff-7ee7-4550-b4f0-90e9476e9fb6"
 Optim = "429524aa-4258-5aef-a3af-852621145aeb"
 Optimisers = "3bd65402-5787-11e9-1adc-39752487f4e2"
 OptimizationMOI = "fd9f6733-72f4-499f-8506-86b2bdd0dea1"
@@ -107,4 +101,4 @@ Tracker = "9f7883ad-71c0-57eb-9f7f-b5c9e6d3789c"
 Zygote = "e88e6eb3-aa80-5325-afca-941959d7151f"
 
 [targets]
-test = ["Aqua", "BenchmarkTools", "Boltz", "ComponentArrays", "DiffEqFlux", "Enzyme", "FiniteDiff", "Flux", "ForwardDiff", "Ipopt", "IterTools", "Lux", "Manifolds", "Manopt", "MLUtils", "ModelingToolkit", "Optim", "OptimizationManopt", "OptimizationMOI", "OptimizationOptimJL", "OptimizationOptimisers", "OrdinaryDiffEqTsit5", "Pkg", "Random", "ReverseDiff", "SafeTestsets", "SciMLSensitivity", "SparseArrays", "SparseDiffTools", "Symbolics", "Test", "Tracker", "Zygote"]
+test = ["Aqua", "BenchmarkTools", "Boltz", "ComponentArrays", "DiffEqFlux", "Enzyme", "FiniteDiff", "Flux", "ForwardDiff", "Ipopt", "IterTools", "Lux", "MLUtils", "ModelingToolkit", "Optim", "OptimizationMOI", "OptimizationOptimJL", "OptimizationOptimisers", "OrdinaryDiffEqTsit5", "Pkg", "Random", "ReverseDiff", "SafeTestsets", "SciMLSensitivity", "SparseArrays", "SparseDiffTools", "Symbolics", "Test", "Tracker", "Zygote"]

docs/Project.toml

@@ -56,10 +56,10 @@ Ipopt = "1"
 IterTools = "1"
 Juniper = "0.9"
 Lux = "1"
-Manifolds = "0.10"
-Manopt = "0.5"
+Manifolds = "0.9"
+Manopt = "0.4"
 MLUtils = "0.4.4"
-ModelingToolkit = "10"
+ModelingToolkit = "9"
 NLPModels = "0.21"
 NLPModelsTest = "0.10"
 NLopt = "0.6, 1"

lib/OptimizationManopt/Project.toml

@@ -15,9 +15,9 @@ Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 [compat]
 LinearAlgebra = "1.10"
 ManifoldDiff = "0.3.10"
-Manifolds = "0.10"
+Manifolds = "0.9.18"
 ManifoldsBase = "0.15.10"
-Manopt = "0.5"
+Manopt = "0.4.63"
 Optimization = "4"
 Reexport = "1.2"
 julia = "1.9"

lib/OptimizationManopt/src/OptimizationManopt.jl

@@ -67,7 +67,7 @@ function call_manopt_optimizer(
         x0;
         stopping_criterion::Union{Manopt.StoppingCriterion, Manopt.StoppingCriterionSet},
         evaluation::AbstractEvaluationType = Manopt.AllocatingEvaluation(),
-        stepsize::Manopt.ManifoldDefaultsFactory = ArmijoLinesearch(),
+        stepsize::Stepsize = ArmijoLinesearch(M),
         kwargs...)
     opts = gradient_descent(M,
         loss,
@@ -111,7 +111,7 @@ function call_manopt_optimizer(M::ManifoldsBase.AbstractManifold,
         x0;
         stopping_criterion::Union{Manopt.StoppingCriterion, Manopt.StoppingCriterionSet},
         evaluation::AbstractEvaluationType = InplaceEvaluation(),
-        stepsize::Manopt.ManifoldDefaultsFactory = ArmijoLinesearch(),
+        stepsize::Stepsize = ArmijoLinesearch(M),
         kwargs...)
     opts = conjugate_gradient_descent(M,
         loss,
@@ -171,7 +171,7 @@ function call_manopt_optimizer(M::Manopt.AbstractManifold,
         evaluation::AbstractEvaluationType = InplaceEvaluation(),
         retraction_method::AbstractRetractionMethod = default_retraction_method(M),
         vector_transport_method::AbstractVectorTransportMethod = default_vector_transport_method(M),
-        stepsize::Manopt.ManifoldDefaultsFactory = WolfePowellLinesearch(;
+        stepsize = WolfePowellLinesearch(M;
             retraction_method = retraction_method,
             vector_transport_method = vector_transport_method,
             linesearch_stopsize = 1e-12),
@@ -308,7 +308,7 @@ function call_manopt_optimizer(M::ManifoldsBase.AbstractManifold,
         stopping_criterion::Union{Manopt.StoppingCriterion, Manopt.StoppingCriterionSet},
         evaluation::AbstractEvaluationType = InplaceEvaluation(),
         retraction_method::AbstractRetractionMethod = default_retraction_method(M),
-        stepsize::Manopt.ManifoldDefaultsFactory = DecreasingStepsize(; length = 2.0, shift = 2),
+        stepsize::Stepsize = DecreasingStepsize(; length = 2.0, shift = 2),
         kwargs...)
     opt = Frank_Wolfe_method(M,
         loss,