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Generic types can't be instantiated

Status: Open.

Bug

#2161 In facebook/pyrefly;

· ndmitchell opened on Jan 19, 2026

Equality comparison with <code>Any</code> should yield <code>Any</code>, not <code>bool</code>.

Status: Open.

#2160 In facebook/pyrefly;

· randolf-scholz opened on Jan 19, 2026

pass vs ...

Status: Open.

#2159 In facebook/pyrefly;

· QEDady opened on Jan 19, 2026

Missing support for <code>typing.Literal</code> in pydantic

Status: Open.

#2156 In facebook/pyrefly;

· MartinBernstorff opened on Jan 19, 2026

Type narrowing doesn't seem to handle NewType and unions properly

Status: Open.

#2155 In facebook/pyrefly;

· aorenste opened on Jan 19, 2026

show diff in signature

Status: Open.

#2154 In facebook/pyrefly;

· asukaminato0721 opened on Jan 19, 2026

Error when class patterns are used as enums in pattern match

help wantedLarger than "good first issue", but still well-defined and ready for someone to pick upLarger than "good first issue", but still well-defined and ready for someone to pick up

typechecking

Status: Open.

Feature

#2153 In facebook/pyrefly;

· yangdanny97 opened on Jan 19, 2026

Notebooks: insert import quick-fix should insert the import in the current cell, not the top cell

help wantedLarger than "good first issue", but still well-defined and ready for someone to pick upLarger than "good first issue", but still well-defined and ready for someone to pick up

language-serverIssues specific to our IDE integration rather than type checkingIssues specific to our IDE integration rather than type checking

notebook

Status: Open.

Feature

#2152 In facebook/pyrefly;

· yangdanny97 opened on Jan 19, 2026

Pyrefly language server server crashed in Windows

crash

needs-triage

Status: Open.

#2148 In facebook/pyrefly;

· L-M-Sherlock opened on Jan 18, 2026

Protocols returning <code>Mapping[str, N]</code> not considered covariant in <code>N</code>

typechecking

Status: Open.

Bug

#2145 In facebook/pyrefly;

· glencoe opened on Jan 17, 2026

code action to convert dict to TypedDict / dataclass / pydantic

pydanticIssues related to support for PydanticIssues related to support for Pydantic

Status: Open.

Feature

#2144 In facebook/pyrefly;

· asukaminato0721 opened on Jan 17, 2026

Casting list of union type to list[Base]

Status: Open.

#2141 In facebook/pyrefly;

· praskr-wisdom opened on Jan 17, 2026