Upgrade to Node 24

.node-version

@@ -1 +1 @@
-20
+24

AGENTS.md

@@ -1,6 +1,6 @@
 # QA Instructions Action
 
-A GitHub Action (TypeScript + Node 20) that generates QA instructions.
+A GitHub Action (TypeScript + Node 24) that generates QA instructions.
 
 ## Build Commands
 
@@ -19,4 +19,4 @@ A GitHub Action (TypeScript + Node 20) that generates QA instructions.
 - **Strict TypeScript** — `tsconfig.json` has `strict: true`. Do not use `any` without justification.
 - **Lint and format before committing** — run `npm run lint` and `npm run format:check` before creating a commit.
 - **Source lives in `src/`** — all TypeScript source code is in the `src/` directory. The `lib/` directory is intermediate compiler output and is git-ignored.
-- **Node version** — defined in `.node-version` and must match the `runs.using` runtime in `action.yml`. When updating Node, change `.node-version`, `action.yml` (`runs.using`), and `@types/node` in `package.json` together.
+- **Node version** — this project uses the active Node.js version supported by GitHub Actions (currently Node 24). The version is defined in `.node-version` and must match the `runs.using` runtime in `action.yml`. When updating Node, change `.node-version`, `action.yml` (`runs.using`), `@types/node` in `package.json`, and `@tsconfig/nodeXX` in both `package.json` and `tsconfig.json` together.

README.md

@@ -155,13 +155,16 @@ npm install
 
 ### Node Version
 
-The Node version is defined in `.node-version` and must match the `runs.using` runtime in `action.yml`. GitHub Actions only supports specific Node runtimes (`node20`, `node24`, etc.). When updating, change all three locations together:
+This project follows a policy of using the active Node.js version supported by GitHub Actions. The Node version is defined in `.node-version` and must match the `runs.using` runtime in `action.yml`. GitHub Actions only supports specific Node runtimes (`node20`, `node24`, etc.).
+
+When updating to a new Node version, change all four locations together:
 
 1. `.node-version`
 2. `action.yml` → `runs.using`
 3. `@types/node` version in `package.json`
+4. `@tsconfig/nodeXX` version in `package.json` and `tsconfig.json`
 
-Currently using **Node 20**. GitHub plans to deprecate `node20` in favor of `node24` in March 2026.
+**Current version: Node 24**
 
 ### Making Changes
 

action.yml

@@ -25,5 +25,5 @@ outputs:
   instructions:
     description: "The generated QA instructions"
 runs:
-  using: "node20"
+  using: "node24"
   main: "dist/index.js"

package.json

@@ -25,8 +25,8 @@
 	},
 	"devDependencies": {
 		"@eslint/js": "^10.0.1",
-		"@tsconfig/node20": "^20.1.9",
-		"@types/node": "^20",
+		"@tsconfig/node24": "^24.0.4",
+		"@types/node": "^24",
 		"esbuild": "^0.27.3",
 		"eslint": "^10",
 		"eslint-config-prettier": "^10",

tsconfig.json

@@ -1,5 +1,5 @@
 {
-	"extends": "@tsconfig/node20/tsconfig.json",
+	"extends": "@tsconfig/node24/tsconfig.json",
 	"compilerOptions": {
 		"rootDir": "./src",
 		"outDir": "./lib",