Bump version to 0.0.20

CHANGELOG.md

@@ -1,5 +1,55 @@
 # Changelog
 
+## 0.0.20
+
+Released on 2026-03-02.
+
+### Bug fixes
+
+- Disallow negative narrowing for `isinstance()` or `issubclass()` checks involving `type[]` types ([#23598](https://github.com/astral-sh/ruff/pull/23598))
+- Fix binary operations between an instance of a `NewType` of `float` and an instance of `Any`/`Unknown` ([#23620](https://github.com/astral-sh/ruff/pull/23620))
+- Fix bug where ty would think that a `Callable` with a variadic positional parameter could be a subtype of a `Callable` with a positional-or-keyword parameter ([#23610](https://github.com/astral-sh/ruff/pull/23610))
+- Fix inference of `t.__mro__` if `t` is an instance of `type[Any]` ([#23632](https://github.com/astral-sh/ruff/pull/23632))
+- Fix overloaded callable assignability for unary `Callable` targets ([#23277](https://github.com/astral-sh/ruff/pull/23277))
+- Limit recursion depth when displaying self-referential function types ([#23647](https://github.com/astral-sh/ruff/pull/23647))
+- Ensure that `python -m ty` works even when ty was installed into an ephemeral virtual environment ([#2852](https://github.com/astral-sh/ty/pull/2852))
+
+### LSP server
+
+- Add support for the LSP protocol's "type hierarchy" feature ([#23566](https://github.com/astral-sh/ruff/pull/23566))
+
+### Type checking
+
+- Add more ParamSpec validation for `P.args` and `P.kwargs` ([#23640](https://github.com/astral-sh/ruff/pull/23640))
+- Ban nested `Required`/`NotRequired`, and ban them both outside of `TypedDict` fields ([#23627](https://github.com/astral-sh/ruff/pull/23627))
+- Detect inconsistent generic base class specializations that appear in the same MRO ([#23615](https://github.com/astral-sh/ruff/pull/23615))
+- Detect invalid uses of `@final` on non-methods ([#23604](https://github.com/astral-sh/ruff/pull/23604))
+- Add partial support and validation for `Unpack` when used with tuple types ([#23651](https://github.com/astral-sh/ruff/pull/23651))
+- Recurse into tuples and nested tuples when applying special-cased validation of arguments passed to `isinstance()` and `issubclass()` ([#23607](https://github.com/astral-sh/ruff/pull/23607))
+- Reject ellipsis literals in odd places in type/annotation expressions ([#23611](https://github.com/astral-sh/ruff/pull/23611))
+- Reject functions with PEP-695 type parameters that shadow type parameters from enclosing scopes ([#23619](https://github.com/astral-sh/ruff/pull/23619))
+- Reject generic metaclasses parameterized by type variables ([#23628](https://github.com/astral-sh/ruff/pull/23628))
+- Treat `dataclass_transform` dataclasses as neither frozen nor non-frozen ([#23366](https://github.com/astral-sh/ruff/pull/23366))
+- Validate that type variable defaults don't reference later type parameters or type parameters out of scope ([#23623](https://github.com/astral-sh/ruff/pull/23623))
+
+### Typeshed
+
+- Sync vendored typeshed stubs ([#23642](https://github.com/astral-sh/ruff/pull/23642)). [Typeshed diff](https://github.com/python/typeshed/compare/1b3cec156330a93f6bb22b6636bca38c27f8f721...843c1fd5a148da85e523c1b4ee680226f89986aa)
+
+### Contributors
+
+- [@Hugo-Polloli](https://github.com/Hugo-Polloli)
+- [@zanieb](https://github.com/zanieb)
+- [@sharkdp](https://github.com/sharkdp)
+- [@mtshiba](https://github.com/mtshiba)
+- [@carljm](https://github.com/carljm)
+- [@charliermarsh](https://github.com/charliermarsh)
+- [@sinon](https://github.com/sinon)
+- [@BurntSushi](https://github.com/BurntSushi)
+- [@oconnor663](https://github.com/oconnor663)
+- [@AlexWaygood](https://github.com/AlexWaygood)
+- [@zsol](https://github.com/zsol)
+
 ## 0.0.19
 
 Released on 2026-02-26.

dist-workspace.toml

@@ -1,7 +1,7 @@
 [workspace]
 members = ["cargo:./ruff"]
 packages = ["ty"]
-version = "0.0.19"
+version = "0.0.20"
 
 # Config for 'dist'
 [dist]

docs/installation.md

@@ -71,7 +71,7 @@ ty includes a standalone installer.
     Request a specific version by including it in the URL:
 
     ```console
-    $ curl -LsSf https://astral.sh/ty/0.0.19/install.sh | sh
+    $ curl -LsSf https://astral.sh/ty/0.0.20/install.sh | sh
     ```
 
 === "Windows"
@@ -87,7 +87,7 @@ ty includes a standalone installer.
     Request a specific version by including it in the URL:
 
     ```pwsh-session
-    PS> powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/ty/0.0.19/install.ps1 | iex"
+    PS> powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/ty/0.0.20/install.ps1 | iex"
     ```
 
 !!! tip
@@ -163,7 +163,7 @@ COPY --from=ghcr.io/astral-sh/ty:latest /ty /bin/
 The following tags are available:
 
 - `ghcr.io/astral-sh/ty:latest`
-- `ghcr.io/astral-sh/ty:{major}.{minor}.{patch}`, e.g., `ghcr.io/astral-sh/ty:0.0.19`
+- `ghcr.io/astral-sh/ty:{major}.{minor}.{patch}`, e.g., `ghcr.io/astral-sh/ty:0.0.20`
 - `ghcr.io/astral-sh/ty:{major}.{minor}`, e.g., `ghcr.io/astral-sh/ty:0.0` (the latest patch
     version)