Add ty to plain code

Author: davegaeddert

plain-code/plain/code/README.md

@@ -8,7 +8,13 @@
 
 ## Overview
 
-The `plain code` command lints and formats Python files using [Ruff](https://astral.sh/ruff), and JavaScript, JSON, and CSS files using [Biome](https://biomejs.dev/). Ruff is installed as a Python dependency, and Biome is managed automatically as a standalone binary (npm is not required).
+The `plain code` command provides comprehensive code quality tools:
+
+- **[Ruff](https://astral.sh/ruff)** - Python linting and formatting
+- **[ty](https://astral.sh/ty)** - Python type checking
+- **[Biome](https://biomejs.dev/)** - JavaScript, JSON, and CSS formatting
+
+Ruff and ty are installed as Python dependencies. Biome is managed automatically as a standalone binary (npm is not required).
 
 The most used command is `plain code fix`, which can be run using the alias `plain fix`:
 
@@ -20,6 +26,25 @@ This will automatically fix linting issues and format your code according to the
 
 ![](https://assets.plainframework.com/docs/plain-fix.png)
 
+To check your code without making changes (including type checking):
+
+```bash
+plain code check
+```
+
+You can skip specific tools if needed:
+
+```bash
+# Skip type checking during rapid development
+plain code check --skip-ty
+
+# Only run type checks
+plain code check --skip-ruff --skip-biome
+
+# Skip Biome checks
+plain code check --skip-biome
+```
+
 If [`plain.dev`](/plain-dev/README.md) is installed then `plain code check` will be run automatically as a part of `plain precommit` to help catch issues before they are committed.
 
 ## Configuration
@@ -32,6 +57,9 @@ You can customize the behavior in your `pyproject.toml`:
 [tool.plain.code]
 exclude = ["path/to/exclude"]
 
+[tool.plain.code.ty]
+enabled = true  # Set to false to disable ty
+
 [tool.plain.code.biome]
 enabled = true  # Set to false to disable Biome
 version = "1.5.3"  # Pin to a specific version

plain-code/plain/code/cli.py

@@ -75,7 +75,16 @@ def update() -> None:
 @cli.command()
 @click.pass_context
 @click.argument("path", default=".")
-def check(ctx: click.Context, path: str) -> None:
+@click.option("--skip-ruff", is_flag=True, help="Skip Ruff checks")
+@click.option("--skip-ty", is_flag=True, help="Skip ty type checks")
+@click.option("--skip-biome", is_flag=True, help="Skip Biome checks")
+def check(
+    ctx: click.Context,
+    path: str,
+    skip_ruff: bool,
+    skip_ty: bool,
+    skip_biome: bool,
+) -> None:
     """Check for formatting and linting issues"""
     ruff_args = ["--config", str(DEFAULT_RUFF_CONFIG)]
     config = get_code_config()
@@ -92,20 +101,28 @@ def maybe_exit(return_code: int) -> None:
             )
             sys.exit(return_code)
 
-    print_event(
-        click.style("Ruff lint:", bold=True) + click.style(" ruff check", dim=True)
-    )
-    result = subprocess.run(["ruff", "check", path, *ruff_args])
-    maybe_exit(result.returncode)
+    if not skip_ruff:
+        print_event(
+            click.style("Ruff lint:", bold=True) + click.style(" ruff check", dim=True)
+        )
+        result = subprocess.run(["ruff", "check", path, *ruff_args])
+        maybe_exit(result.returncode)
 
-    print_event(
-        click.style("Ruff format:", bold=True)
-        + click.style(" ruff format --check", dim=True)
-    )
-    result = subprocess.run(["ruff", "format", path, "--check", *ruff_args])
-    maybe_exit(result.returncode)
+        print_event(
+            click.style("Ruff format:", bold=True)
+            + click.style(" ruff format --check", dim=True)
+        )
+        result = subprocess.run(["ruff", "format", path, "--check", *ruff_args])
+        maybe_exit(result.returncode)
 
-    if config.get("biome", {}).get("enabled", True):
+    if not skip_ty and config.get("ty", {}).get("enabled", True):
+        print_event(
+            click.style("Ty:", bold=True) + click.style(" ty check", dim=True)
+        )
+        result = subprocess.run(["ty", "check", path])
+        maybe_exit(result.returncode)
+
+    if not skip_biome and config.get("biome", {}).get("enabled", True):
         biome = Biome()
 
         if biome.needs_update():

plain-code/pyproject.toml

@@ -9,6 +9,7 @@ requires-python = ">=3.13"
 dependencies = [
     "plain<1.0.0",
     "ruff>=0.1.0",
+    "ty>=0.0.1a27",
     "requests>=2.0.0",
     "tomlkit>=0.11.0",
 ]