sktime/sktime

[ENH] merge or vendor `tsbootstrap` into `sktime`

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#9990 opened on Apr 23, 2026

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enhancementgood first issuemodule:splitters&resamplers

Description

tsbootstrap is currently unmaintained, and compatibility with sktime has broken due to an upper bound on scikit-base<0.11 in tsbootstrap - sktime 1.0 will require scikit-base 1.0.

While we investigate tsbootstrap, we need to find a solution that is at least temporary.

There are two options here:

  • library vendoring, in sktime.libs
  • direct merge, to sktime.bootstrap

It should be investigated which of the two is more advisable - a library vendor might be easier, and a direct merge might be worth doing in a second step, once the current status of tsbootstrap has been clarified.

Contributor guide

Tech stack
pythonscikit learn
Domain
machine learningdeveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Pythonsktime library structurepackaging concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the current state of tsbootstrap and its compatibility issues with sktime. Evaluate the two proposed options: vendoring into sktime.libs or direct merge into sktime.bootstrap. Look for any existing guidelines or similar precedents in the sktime repository to inform the decision. Consider the long term maintainability and effort required for each approach.