diff --git a/hermes/install.sh b/hermes/install.sh
index 7b74e5f..953b4a9 100755
--- a/hermes/install.sh
+++ b/hermes/install.sh
@@ -26,6 +26,12 @@ REPO_ROOT="$(dirname -- "$SCRIPT_DIR")"
 
 say() { printf '%s\n' "$*" >&2; }
 
+# The installer links the CLI into ~/.local/bin, which is only on PATH in
+# shells that sourced the managed ~/.zshrc. bootstrap run by a non-shell
+# parent (the Coder agent's dotfiles script) has no such PATH, so the
+# post-install `command -v hermes` failed on a successful install.
+PATH="$HOME/.local/bin:$PATH"
+
 # Hermes Agent version (synced with PyPI/npm).
 HERMES_VERSION="v0.18.2"