fix(coding-agent): prevented puppeteer startup crashes

- Avoided value-imports of `puppeteer-core` in main startup files to prevent eager loading of the browser-data dependency graph.
- Used `import type` and literal string checks to defer `puppeteer-core` initialization until browser tools are actually invoked.
- Added a test to verify that `puppeteer-core` and `@puppeteer/browsers` remain off the eager startup import graph.
- Externalized additional heavy dependencies to reduce bundle size and improved minification settings in the build script.

packages/coding-agent/scripts/bundle-dist.ts

@@ -9,6 +9,31 @@ const outDir = path.join(packageDir, "dist");
 const cliPath = path.join(outDir, "cli.js");
 const shebang = "#!/usr/bin/env bun\n";
 
+// Native / optional / platform-specific deps that are never bundled — installed on
+// demand (transformers/fastembed/onnxruntime) or shipped as their own artifact
+// (native addon, mupdf).
+const ALWAYS_EXTERNAL = ["mupdf", "@oh-my-pi/pi-natives", "@huggingface/transformers", "fastembed", "onnxruntime-node"];
+
+// Heavy, lazily-used third-party leaf deps. Each is a declared `dependency`, so the
+// published package resolves it from node_modules at runtime; bundling only embeds a
+// redundant copy that bloats dist/cli.js. NEVER add a patched dependency here — the
+// bundle is where a root `patchedDependencies` patch is baked in, so an externalized
+// import would load the unpatched npm package in users' installs (currently
+// beautiful-mermaid and @ark/schema are patched, so they — and arktype, which pulls
+// @ark/schema — stay bundled).
+const RUNTIME_EXTERNAL = [
+	"puppeteer-core",
+	"@puppeteer/browsers",
+	"@babel/parser",
+	"@xterm/headless",
+	"turndown",
+	"turndown-plugin-gfm",
+	"@mozilla/readability",
+	"linkedom",
+	"markit-ai",
+	"@agentclientprotocol/sdk",
+];
+
 async function runCommand(command: string[]): Promise<void> {
 	const proc = Bun.spawn(command, {
 		cwd: packageDir,
@@ -63,19 +88,11 @@ async function main(): Promise<void> {
 			"--target=bun",
 			"--outdir",
 			"dist",
-			"--minify-whitespace",
-			"--minify-syntax",
+			// Full minify (whitespace + syntax + identifiers); --keep-names retains
+			// fn/class .name where code depends on it.
+			"--minify",
 			"--keep-names",
-			"--external",
-			"mupdf",
-			"--external",
-			"@oh-my-pi/pi-natives",
-			"--external",
-			"@huggingface/transformers",
-			"--external",
-			"fastembed",
-			"--external",
-			"onnxruntime-node",
+			...[...ALWAYS_EXTERNAL, ...RUNTIME_EXTERNAL].flatMap(dep => ["--external", dep]),
 			"--define",
 			'process.env.PI_BUNDLED="true"',
 			"./src/cli.ts",