Deploy main 5e572ce to prod (#198)

main's tree, with next merged on 26 October, as one commit onto prod, on sneak's order.

Model: opus-5-5
Co-authored-by: clawbot <clawbot@noreply.example.org>

script/fmt

@@ -1,14 +1,20 @@
 #!/bin/sh
-# script/fmt: format the whole repo (writes): prettier over everything
-# it understands, then gofmt over the Go backend.
+# script/fmt: format the whole repo (writes): prettier over the
+# JavaScript, CSS, HTML and Markdown, then gofmt over the Go sources in
+# cmd/ and internal/; not over the whole root, as node_modules/ holds
+# .go files of its own. The org model formats only markdown; this repo
+# also has JS and Go.
 set -eu
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
+    # script/bootstrap links the node, yarn and gofmt it installs into
+    # ~/.local/bin, which the shell that called it may not have on PATH.
+    PATH="$HOME/.local/bin:$PATH"
     "$ROOT/script/frontend-fmt"
-    "$ROOT/backend/script/fmt"
+    gofmt -l -w cmd internal
 }
 
 main "$@"