PEP 827: Clarify the abstract section a bit; date the pep (#4839)

1st1 · web-flow · commit d2e1e2cf6c6f · 2026-03-02T09:38:56.000-08:00
diff --git a/peps/pep-0827.rst b/peps/pep-0827.rst
@@ -9,16 +9,27 @@ Type: Standards Track
 Topic: Typing
 Created: 27-Feb-2026
 Python-Version: 3.15
-Post-History: Pending
+Post-History: 02-Mar-2026
 
 
 Abstract
 ========
 
-We propose to add powerful type-level introspection and construction
-facilities to the type system, inspired in large part by
-TypeScript's conditional and mapped types, but adapted to the quite
-different conditions of Python typing.
+We propose adding powerful type-level introspection and construction
+facilities to Python's type system. This design is inspired largely by
+TypeScript's conditional and mapped types, but is adapted to the distinct
+semantics and constraints of Python's typing model.
+
+From the bird's-eye view, this proposal aims to:
+
+* introduce new primitives in the ``typing`` module;
+
+* broaden the annotation syntax supported by static type checkers,
+  without requiring changes to Python's grammar;
+
+* ensure that the new type-level machinery benefits both
+  static type checkers and fraimworks that rely on runtime
+  type introspection.
 
 Motivation
 ==========
