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For extending the type alias created with <code>TypeAlias</code> or an assignment statement, pyrefly should also give error for consistency

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

Status: Open.

Bug

#2002 In facebook/pyrefly;

· hyperkai opened on Jan 5, 2026

--quiet/-q flag to silence non-error output

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

Status: Open.

Feature

#2000 In facebook/pyrefly;

· begoon opened on Jan 4, 2026

Narrowing a union of tuples through isinstance() only removes one tuple at a time

narrowingIssues with narrowing - root cause is usually narrowing, flow handling, or bothIssues with narrowing - root cause is usually narrowing, flow handling, or both

typechecking

Status: Open.

Bug

#1999 In facebook/pyrefly;

· Wizzerinus opened on Jan 4, 2026

Functions returning a TypeGuard value are incorrectly propagating the TypeGuard as their return type

narrowingIssues with narrowing - root cause is usually narrowing, flow handling, or bothIssues with narrowing - root cause is usually narrowing, flow handling, or both

typechecking

Status: Open.

Bug

#1998 In facebook/pyrefly;

· Wizzerinus opened on Jan 4, 2026

Support mypy_extensions.FlexibleAlias

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

typechecking

Status: Open.

Feature

#1995 In facebook/pyrefly;

· adamtheturtle opened on Jan 3, 2026

Feature request: prevent decorators from making functions effectively untyped

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

Status: Open.

Feature

#1990 In facebook/pyrefly;

· rchen152 opened on Jan 3, 2026

Feature request: support module-level <code>__getattr__</code> in stubs

typechecking

Status: Open.

Feature

#1988 In facebook/pyrefly;

· rchen152 opened on Jan 2, 2026

panic: Name not found in static scope of module <code>__unknown__</code>

needs-discussionAn issue where it's not clear whether there is a bug or we are behaving as expected.An issue where it's not clear whether there is a bug or we are behaving as expected.

Status: Open.

#1987 In facebook/pyrefly;

· correctmost opened on Jan 2, 2026

Overloads using enum literals returning unexpected type

typechecking

Status: Open.

Bug

#1982 In facebook/pyrefly;

· kymckay opened on Jan 2, 2026

Problem with displaying whitespace chars literals

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

Status: Open.

Bug

#1975 In facebook/pyrefly;

· guoci opened on Dec 31, 2025

TypeVar does not support unary OP despite being upper bounded by type supporting unary OP

Status: Open.

Bug

#1972 In facebook/pyrefly;

· randolf-scholz opened on Dec 31, 2025

Reading <code>__v</code> from the outside of the class, pyrefly doesn't give any error while Python interpreter gives error

Status: Open.

Bug

#1971 In facebook/pyrefly;

· hyperkai opened on Dec 31, 2025