OptimizationNLopt: make imports explicit

[ChrisRackauckas-Claude]

OptimizationNLopt now imports the NLopt, OptimizationBase, and SciMLBase module bindings and the individual names its implementation uses. The QA suite no longer marks no_implicit_imports as broken, and the NLopt module, Algorithm, Opt, OptimizationCache, and ReturnCode bindings remain available.

Verification

The QA and Core commands below ran from lib/OptimizationNLopt, with the Julia depot and temporary directory isolated under this job directory.

• Baseline QA, before changes:

  export TMPDIR=/home/crackauc/sandbox/goals/qa-hygiene/jobs/nlopt-imports/tmp
  export JULIA_DEPOT_PATH=/home/crackauc/sandbox/goals/qa-hygiene/jobs/nlopt-imports/scratch/julia-depot
  ulimit -n 65536
  OPTIMIZATION_TEST_GROUP=QA julia --project -e 'using Pkg; Pkg.test()'

  Output tail: Quality Assurance | 26 1 27 1m35.1s; Testing OptimizationNLopt tests passed.
• QA after change: same commands — output tail: Quality Assurance | 27 27 1m33.5s; Testing OptimizationNLopt tests passed.
• Core:

  export TMPDIR=/home/crackauc/sandbox/goals/qa-hygiene/jobs/nlopt-imports/tmp
  export JULIA_DEPOT_PATH=/home/crackauc/sandbox/goals/qa-hygiene/jobs/nlopt-imports/scratch/julia-depot
  ulimit -n 65536
  OPTIMIZATION_TEST_GROUP=Core julia --project -e 'using Pkg; Pkg.test()'

  Output tail: Core | 42 42 1m36.0s; Testing OptimizationNLopt tests passed.
• From the repository root, julia --project=@runic -e 'using Runic; exit(Runic.main(ARGS))' -- --inplace lib/OptimizationNLopt/src/OptimizationNLopt.jl lib/OptimizationNLopt/test/qa/qa.jl — exit 0.
• From the repository root, typos lib/OptimizationNLopt/src/OptimizationNLopt.jl lib/OptimizationNLopt/test/qa/qa.jl — exit 0.
• Scanned lib/, test/, and docs/ for qualified OptimizationNLopt.x references. The only code use is OptimizationNLopt.Opt in lib/OptimizationMultistartOptimization/test/core_tests.jl; Opt remains explicitly imported. The QA reexport check passes.

Not verified: CI, the full Optimization.jl monorepo suite, and downstream packages.

Please ignore this draft until reviewed by @ChrisRackauckas.

Risk assessment

• Risk: low
• Blast radius: imports and QA status for OptimizationNLopt. Exports and docstrings are unchanged, and the repository's one qualified use, OptimizationNLopt.Opt, still resolves to NLopt.Opt. Names that were only incidentally reachable as OptimizationNLopt.x through the old blanket using (e.g. OptimizationNLopt.solve, OptimizationNLopt.AutoForwardDiff) no longer are; nothing in lib/, test/ or docs/ uses them, but downstream code spelling them that way would break.
• Evidence: QA changed from 26 pass / 1 broken to 27 pass; Core passes 42/42; Runic and typos exit 0.
• Independent review: Codex gpt-6-astra rated it low risk, high confidence, verdict MERGE, after rerunning QA on base and head (26+1 broken → 27/27), Core (42/42) and a base/head binding comparison. It is the same harness as the author. Cross-harness: Claude Code (claude-opus-5-5[1m]) read the full diff and rated it low risk, high confidence, verdict MERGE.
• Merge: auto-merge candidate once CI is green.

🤖 Generated with Codex CLI 0.160.0 (model: gpt-6-luna); transcript: /home/crackauc/sandbox/goals/qa-hygiene/jobs/nlopt-imports/log.txt