Add safety and dependency constraints

CLAUDE.md

@@ -74,3 +74,6 @@ Transcript-based shell integration test runner. Rust.
 - Rust 2024 edition
 - No OOP — plain functions and structs/enums
 - Integration tests in `tests/shout.rs`, example `.shout` files in `tests/`
+- Never use `unsafe`
+- Keep dependencies to the bare minimum.
+- If you must use a dependency, use the lightest-weight version.

web/index.html

@@ -176,8 +176,8 @@
 <header>
   <h1><span>$</span> shout</h1>
   <p class="tagline">shell output tester</p>
-  <div class="install" onclick="navigator.clipboard.writeText('curl -fsSL https://because.sh/shout/install | sh')">
-    <span class="prompt">$</span> <span class="cmd">curl -fsSL https://because.sh/shout/install | sh</span>
+  <div class="install" onclick="navigator.clipboard.writeText('curl -fsSL https://because.sh/shout | sh')">
+    <span class="prompt">$</span> <span class="cmd">curl -fsSL https://because.sh/shout | sh</span>
     <span class="hint">click to copy</span>
   </div>
 </header>