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[build] We should test more build patterns via CI

Status: Open.

#679 In 21cmfast/21cmFAST;

· steven-murray opened on Apr 29, 2026

Allow to pass global_evolution to C backend

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: mediumMedium priorityMedium priority

Status: Open.

#678 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 29, 2026

Change regenerate default logic

context: cache/ioChanges predominantly affect caching or I/OChanges predominantly affect caching or I/O

priority: mediumMedium priorityMedium priority

status: requires discussionIssue requires further discussion before implementationIssue requires further discussion before implementation

Status: Open.

#677 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 29, 2026

Make a convenient method to evolve an existing CacheConfig instance

context: cache/ioChanges predominantly affect caching or I/OChanges predominantly affect caching or I/O

priority: mediumMedium priorityMedium priority

type: feature: uiNew feature that adds functionality for the userNew feature that adds functionality for the user

Status: Open.

#673 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 26, 2026

Decide on a consistent mean fixing logic for the emissivity fields

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: mediumMedium priorityMedium priority

status: requires discussionIssue requires further discussion before implementationIssue requires further discussion before implementation

type: accuracyEnhancement that improves accuracyEnhancement that improves accuracy

Status: Open.

#669 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 14, 2026

Filter emissivity fields in all SOURCE_MODEL options

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: highHigh priorityHigh priority

type: accuracyEnhancement that improves accuracyEnhancement that improves accuracy

type: maint: refactoringRefactoringRefactoring

type: maint: removalRemovals and DeprecationsRemovals and Deprecations

Status: Open.

#668 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 14, 2026

Small redshift step size [BUG]

priority: mediumMedium priorityMedium priority

type: bugSomething isn't workingSomething isn't working

Status: Open.

#667 In 21cmfast/21cmFAST;

· coltonf96 opened on Apr 13, 2026

Think about the file layout before the release of v5

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: lowLow priorityLow priority

status: requires discussionIssue requires further discussion before implementationIssue requires further discussion before implementation

type: maint: refactoringRefactoringRefactoring

Status: Open.

#665 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 7, 2026

Usage of ZPRIME_STEP_FACTOR and Z_HEAT_MAX in the C code

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: mediumMedium priorityMedium priority

type: maint: removalRemovals and DeprecationsRemovals and Deprecations

Status: Open.

#664 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 7, 2026

CosmoTables should be a cached_property on InputParameters

priority: mediumMedium priorityMedium priority

type: performance: speedPerformance improvements that reduce walltimePerformance improvements that reduce walltime

Status: Open.

#663 In 21cmfast/21cmFAST;

· steven-murray opened on Apr 7, 2026

Improve runtime performance in tau_X, mostly before reionization has started

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: mediumMedium priorityMedium priority

status: requires researchIssue requires further research before implementationIssue requires further research before implementation

type: performance: speedPerformance improvements that reduce walltimePerformance improvements that reduce walltime

Status: Open.

#660 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 2, 2026

Improve precision of tau_X, mostly after reionization has started

context: C backendChanges occur predominantly in the C codeChanges occur predominantly in the C code

priority: mediumMedium priorityMedium priority

type: accuracyEnhancement that improves accuracyEnhancement that improves accuracy

Status: Open.

#659 In 21cmfast/21cmFAST;

· jordanflitter opened on Apr 2, 2026