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feat: add new callback hook on_before_optimizer_setup

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21272

#21272 In Lightning-AI/pytorch-lightning;

· deependujha opened on Oct 6, 2025

· Review required

· 67/71

3

[Fabric] Ignore Keyword Arguments Outside of Callback Signature

docsDocumentation relatedDocumentation related

fabriclightning.fabric.Fabriclightning.fabric.Fabric

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21258

#21258 In Lightning-AI/pytorch-lightning;

· SkafteNicki opened on Oct 1, 2025

· Review required

· 98/110

1

Docs: drop deprecated project

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21250

#21250 In Lightning-AI/pytorch-lightning;

· Borda opened on Sep 25, 2025

· Review required

· 20/24

1

update maintainers/codeowners

ciContinuous IntegrationContinuous Integration

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21240

#21240 In Lightning-AI/pytorch-lightning;

· Borda opened on Sep 22, 2025

· Review required

· 12/13

1

Smaller docfix for cli scheduler documentation

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21228

#21228 In Lightning-AI/pytorch-lightning;

· SkafteNicki opened on Sep 17, 2025

· Approved

· 68/79

Add link to pytorch profiler API

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

profiler

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21218

#21218 In Lightning-AI/pytorch-lightning;

· SkafteNicki opened on Sep 15, 2025

· Approved

· 65/71

drop dumping wheels after UV switch

ciContinuous IntegrationContinuous Integration

docsDocumentation relatedDocumentation related

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21217

#21217 In Lightning-AI/pytorch-lightning;

· Borda opened on Sep 15, 2025

· Review required

· 77/81

2

Docs finetuning callback example

callback: finetuning

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21216

#21216 In Lightning-AI/pytorch-lightning;

· SkafteNicki opened on Sep 15, 2025

· Approved

· 75/79

build(deps): update onnxscript requirement from <0.5.0,>=0.1.0 to >=0.1.0,<0.6.0 in /requirements

ciContinuous IntegrationContinuous Integration

dependenciesPull requests that update a dependency filePull requests that update a dependency file

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 21213

#21213 In Lightning-AI/pytorch-lightning;

· dependabot opened on Sep 15, 2025

· Approved

· 72/75

2

Document tensorboard experiment property

dependenciesPull requests that update a dependency filePull requests that update a dependency file

docsDocumentation relatedDocumentation related

fabriclightning.fabric.Fabriclightning.fabric.Fabric

loggerRelated to the LoggersRelated to the Loggers

logger: tensorboard

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Draft (not ready).

Lightning-AI/pytorch-lightningnumber 21101

#21101 In Lightning-AI/pytorch-lightning;

· SkafteNicki opened on Aug 21, 2025

· Review required

· 116/122

1



MoE (mixture of experts) support for expert parallel

docsDocumentation relatedDocumentation related

featureIs an improvement or enhancementIs an improvement or enhancement

questionFurther information is requestedFurther information is requested

Status: Open.

#20982 In Lightning-AI/pytorch-lightning;

· MeteorsHub opened on Jul 15, 2025

2 comments

Proper way to use mixed precision with manual optimization

docsDocumentation relatedDocumentation related

Status: Open.

#20970 In Lightning-AI/pytorch-lightning;

· aRI0U opened on Jul 9, 2025

1 comment

Recommend uv commands for development scripts

docsDocumentation relatedDocumentation related

Status: Open.

#20969 In Lightning-AI/pytorch-lightning;

· matsumotosan opened on Jul 9, 2025

Cannot reproduce FSDP memory profile in docs

docsDocumentation relatedDocumentation related

strategy: fsdpFully Sharded Data ParallelFully Sharded Data Parallel

ver: 2.5.x

Status: Open.

#20963 In Lightning-AI/pytorch-lightning;

· MonliH opened on Jul 4, 2025

docs(csv_logs): Clarify CSV and YAML logging distinction and improve examples

docsDocumentation relatedDocumentation related

loggerRelated to the LoggersRelated to the Loggers

logger: csv

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 20951

#20951 In Lightning-AI/pytorch-lightning;

· bhimrazy opened on Jul 1, 2025

· Review required

· 83/86

6



CSVLogger missing information about yaml

docsDocumentation relatedDocumentation related

logger: csv

Status: Open.

#20724 In Lightning-AI/pytorch-lightning;

· turbotimon opened on Apr 17, 2025

1

2 comments

docs(LightningModule): update docs for .training mode in loops

docsDocumentation relatedDocumentation related

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 20716

#20716 In Lightning-AI/pytorch-lightning;

· adosar opened on Apr 15, 2025

· Review required

· 67/79

9

[DOC] inconsistent default value for val_check_interval

docsDocumentation relatedDocumentation related

trainer: argument

Status: Open.

#20678 In Lightning-AI/pytorch-lightning;

· turbotimon opened on Mar 27, 2025

1 comment

16 bit precision in Trainer leading to NaN

docsDocumentation relatedDocumentation related

featureIs an improvement or enhancementIs an improvement or enhancement

precision: halfHalf-precisionHalf-precision

Status: Open.

#20619 In Lightning-AI/pytorch-lightning;

· runyournode opened on Mar 5, 2025

Comet: Undocumented and incorrectly described function

3rd partyRelated to a 3rd-partyRelated to a 3rd-party

docsDocumentation relatedDocumentation related

logger: comet

Status: Open.

#20583 In Lightning-AI/pytorch-lightning;

· IanMaquignaz opened on Feb 10, 2025

The best practice to monitor the data loading time & training forward backward time

docsDocumentation relatedDocumentation related

profiler

questionFurther information is requestedFurther information is requested

Status: Open.

#20580 In Lightning-AI/pytorch-lightning;

· deeptimhe opened on Feb 9, 2025

Batch size finder code example in dark mode is light instead of dark

docsDocumentation relatedDocumentation related

tuner

Status: Open.

#20530 In Lightning-AI/pytorch-lightning;

· nicolasperez19 opened on Jan 6, 2025

Encourage NumPy dependent projects to upgrade to version >=2.5.0

docsDocumentation relatedDocumentation related

Status: Open.

#20527 In Lightning-AI/pytorch-lightning;

· adosar opened on Jan 5, 2025

1 comment

The breadcrumb navigation is wrong.

bugSomething isn't workingSomething isn't working

docsDocumentation relatedDocumentation related

Status: Open.

#20503 In Lightning-AI/pytorch-lightning;

· slgxmh opened on Dec 19, 2024

2 comments

Add Deepspeed Zero 3 MiCS support

docsDocumentation relatedDocumentation related

fabriclightning.fabric.Fabriclightning.fabric.Fabric

plGeneric label for PyTorch Lightning packageGeneric label for PyTorch Lightning package

strategy: deepspeed

Status: Open (in progress).

Lightning-AI/pytorch-lightningnumber 20461

#20461 In Lightning-AI/pytorch-lightning;

· hehepig4 opened on Dec 3, 2024

· Approved

· 109/112

19