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Optimizer: cap the first L-BFGS/BFGS step so that large initial gradients do not fail the first line search - #3448

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jachymb:feature/optimizer-first-step-cap

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Optimizer: cap the first L-BFGS/BFGS step so that large initial gradients do not fail the first line search#3448
jachymb wants to merge 4 commits into
stan-dev:developfrom
jachymb:feature/optimizer-first-step-cap

Commits on Oct 18, 2026
- Cap the first optimizer step
  jachymb
  committed
  8bdfe61
Commits on Oct 19, 2026
- Restart once and skip the step tests after a capped first step
  avehtari
  committed
  c67e001
Commits on Oct 20, 2026
- Note the Hessian reset after a capped first step in the iteration log
  jachymb
  committed
  2dfee5e
Commits on Oct 25, 2026
- Merge branch 'develop' into feature/optimizer-first-step-cap
  jachymb
  authored
  07c87f6