fix windows PATHEXT resolution for .cmd/.bat wrappers

.gitignore

@@ -35,4 +35,6 @@ benchmark-report.md
 *.sqlite
 *.sqlite3
 rtk_tracking.db
-claudedocs
+claudedocs
+
+.omc

CHANGELOG.md

@@ -5,6 +5,15 @@ All notable changes to rtk (Rust Token Killer) will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+- **Windows PATHEXT Support** ([#212](https://github.com/rtk-ai/rtk/issues/212)): RTK now correctly spawns .CMD/.BAT/.PS1 wrappers on Windows
+  - Replaced all `Command::new(name)` with `resolved_command(name)` across 16+ command modules
+  - Added `which` crate for proper PATH+PATHEXT resolution before spawning commands
+  - Replaced manual `which_command()` helpers with `tool_exists()` utility
+  - Affects: vitest, eslint, tsc, pnpm, npm, npx, playwright, prisma, next, prettier, ruff, pytest, pip, mypy, golangci-lint, and more
+
 ## [0.23.0](https://github.com/rtk-ai/rtk/compare/v0.22.2...v0.23.0) (2026-02-28)