Fix Windows binary detection for Bun compiled executables

- Updated isBunBinary detection to check for %7EBUN (URL-encoded ~BUN)
- Simplified build:binary script to remove Unix-specific shell syntax
- Binary now correctly locates supporting files next to executable on Windows

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- **Windows binary detection**: Fixed Bun compiled binary detection on Windows by checking for URL-encoded `%7EBUN` in addition to `$bunfs` and `~BUN` in `import.meta.url`. This ensures the binary correctly locates supporting files (package.json, themes, etc.) next to the executable.
+
 ## [0.12.15] - 2025-12-06
 
 ### Fixed

packages/coding-agent/package.json

@@ -19,7 +19,7 @@
 	"scripts": {
 		"clean": "rm -rf dist",
 		"build": "tsgo -p tsconfig.build.json && chmod +x dist/cli.js && npm run copy-assets",
-		"build:binary": "command -v bun >/dev/null 2>&1 || { echo 'Error: Bun is required for building the binary. Install it from https://bun.sh'; exit 1; } && npm run build && bun build --compile ./dist/cli.js --outfile dist/pi && npm run copy-binary-assets",
+		"build:binary": "npm run build && bun build --compile ./dist/cli.js --outfile dist/pi && npm run copy-binary-assets",
 		"copy-assets": "cp src/theme/*.json dist/theme/",
 		"copy-binary-assets": "cp package.json dist/ && cp README.md dist/ && cp CHANGELOG.md dist/",
 		"dev": "tsgo -p tsconfig.build.json --watch --preserveWatchOutput",

packages/coding-agent/src/config.ts

@@ -12,9 +12,10 @@ const __dirname = dirname(__filename);
 
 /**
  * Detect if we're running as a Bun compiled binary.
- * Bun binaries have import.meta.url containing "$bunfs" (Bun's virtual filesystem path)
+ * Bun binaries have import.meta.url containing "$bunfs", "~BUN", or "%7EBUN" (Bun's virtual filesystem path)
  */
-export const isBunBinary = import.meta.url.includes("$bunfs");
+export const isBunBinary =
+	import.meta.url.includes("$bunfs") || import.meta.url.includes("~BUN") || import.meta.url.includes("%7EBUN");
 
 // =============================================================================
 // Package Asset Paths (shipped with executable)