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Only load the necesssary backends when testing with <code>skip_backend</code> or <code>only_backend</code> markers

feat/enhancementNew feature or requestNew feature or request

good first issueGood for newcomersGood for newcomers

help wantedExtra attention is needed / contributions welcomeExtra attention is needed / contributions welcome

testspytestpytest

Status: Open.

Feature

#2654 In scikit-hep/pyhf;

· ghisvail opened on Dec 24, 2025

Drop support for Python 3.9 to maintain testing consistency

BreakingResults in a known breaking changeResults in a known breaking change

buildChanges that affect the build system or external dependenciesChanges that affect the build system or external dependencies

Status: Open.

Task

#2653 In scikit-hep/pyhf;

· matthewfeickert opened on Dec 24, 2025

Improve speed of Click autocompletions

CLIAffects the CLI APIAffects the CLI API

help wantedExtra attention is needed / contributions welcomeExtra attention is needed / contributions welcome

perfA code change that improves performanceA code change that improves performance

Status: Open.

Task

#2649 In scikit-hep/pyhf;

· matthewfeickert opened on Dec 18, 2025

Handling non-existent Hessian in fits with no free parameters with latest iminuit

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#2637 In scikit-hep/pyhf;

· alexander-held opened on Nov 18, 2025

Add Scientific Python repo review checks to CI

CICI systems, GitHub ActionsCI systems, GitHub Actions

styleChanges that do not affect the meaning of the codeChanges that do not affect the meaning of the code

Status: Open.

#2624 In scikit-hep/pyhf;

· matthewfeickert opened on Oct 16, 2025

Click v8.2.X breaks docs build with unexpected keyword argument 'ctx'

bugSomething isn't workingSomething isn't working

docsDocumentation relatedDocumentation related

Status: Open.

#2614 In scikit-hep/pyhf;

· matthewfeickert opened on Oct 14, 2025

code2's fast interpolation is inconsistent with the slow interpolation

bugSomething isn't workingSomething isn't working

needs-triageNeeds a maintainer to categorize and assignNeeds a maintainer to categorize and assign

Status: Open.

#2610 In scikit-hep/pyhf;

· kratsg opened on Oct 3, 2025

Multiple correlated modifiers acting on same distribution result in silent skipping

bugSomething isn't workingSomething isn't working

needs-triageNeeds a maintainer to categorize and assignNeeds a maintainer to categorize and assign

Status: Open.

#2602 In scikit-hep/pyhf;

· alexander-held opened on Sep 8, 2025

Pyhf giving inconsistent results depending on machine, with identical setups

bugSomething isn't workingSomething isn't working

needs-triageNeeds a maintainer to categorize and assignNeeds a maintainer to categorize and assign

Status: Open.

#2601 In scikit-hep/pyhf;

· ldcorpe opened on Sep 6, 2025

Linkcheck for docs is failing

bugSomething isn't workingSomething isn't working

docsDocumentation relatedDocumentation related

Status: Open.

#2594 In scikit-hep/pyhf;

· matthewfeickert opened on Jul 18, 2025

Support for unbound parameters

feat/enhancementNew feature or requestNew feature or request

needs-triageNeeds a maintainer to categorize and assignNeeds a maintainer to categorize and assign

Status: Open.

#2585 In scikit-hep/pyhf;

· MoAly98 opened on Apr 11, 2025

Inconsistency between <code>main</code> branch and tagged release treatment of default POI name

bugSomething isn't workingSomething isn't working

needs-triageNeeds a maintainer to categorize and assignNeeds a maintainer to categorize and assign

Status: Open.

#2583 In scikit-hep/pyhf;

· MoAly98 opened on Apr 7, 2025