feedback6 R21E: .gitignore lists .npm-cache/ — a local npm cache (npm_config_cache=./.npm-cache, npm ci --cache .npm-cache) is never committed by any contributor (GitHub #258); test/gitignore.test.js asks git itself; golden: unchanged

.gitignore

@@ -1,5 +1,7 @@
 # --- dependencies & generated client libs -------------------------------------------------------
 node_modules/
+# a local npm cache (npm_config_cache=./.npm-cache, npm ci --cache .npm-cache — GitHub #258)
+.npm-cache/
 # copied from node_modules by tools/vendor.mjs (postinstall); never commit third-party builds
 public/vendor/