From a90270425b2811c297a85905102afaf03e57e718 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 21 Jan 2026 14:52:16 +0000
Subject: [PATCH] Add TypeScript type checking to test script

The test files were not being type-checked because tsconfig.json only
included src/**/*.ts. This meant invalid properties on Pipeline objects
would silently pass through to YAML output.

Add tsconfig.test.json that extends the base config but includes test
files, and update the test script to run tsc before node --test. This
ensures TypeScript's excess property checking catches invalid keys.

Fixes #21
---
 package.json       | 2 +-
 tsconfig.test.json | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 tsconfig.test.json

diff --git a/package.json b/package.json
index d6c2d39..f5c0906 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "lint": "oxlint .",
     "lint:fix": "oxlint --fix .",
     "prepublishOnly": "pnpm build",
-    "test": "node --test"
+    "test": "tsc -p tsconfig.test.json && node --test"
   },
   "dependencies": {
     "yaml": "^2.8.2"
diff --git a/tsconfig.test.json b/tsconfig.test.json
new file mode 100644
index 0000000..bce6a5a
--- /dev/null
+++ b/tsconfig.test.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "declaration": false,
+    "noEmit": true
+  },
+  "include": ["src/**/*.ts", "test/**/*.ts"]
+}