The keeper can say a word at a table through the keeper's door, signed as the keeper and heard whether or not the gallery may talk, so a call answered too late, after the game began, can still be answered; <slug>-say.sh sends it

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up

deploy/hnefatafl-say.sh

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+#!/usr/bin/env bash
+# A word from the keeper in a table's talk, signed as the keeper, whether or
+# not the host lets the gallery talk: the answer to a call that came too late,
+# or anything else the table should hear from the keeper. Runs ON the droplet,
+# through the game server's keeper door.
+#   hnefatafl-say.sh ROOM "text"
+set -euo pipefail
+ROOM="${1:?usage: hnefatafl-say.sh ROOM \"text\"}"
+TEXT="${2:?usage: hnefatafl-say.sh ROOM \"text\"}"
+DOOR="http://127.0.0.1:8789/keeper/rooms/${ROOM^^}"
+[ -s /etc/hnefatafl/keeper.key ] || { echo "No keeper's key at /etc/hnefatafl/keeper.key; a deploy makes it." >&2; exit 1; }
+# The key goes as a header read from a file descriptor, never on a command line another user could see.
+KEY="@/dev/fd/3"
+exec 3< <(printf 'x-keeper-key: %s\n' "$(cat /etc/hnefatafl/keeper.key)")
+BODY=$(TEXT="$TEXT" python3 -c 'import json, os; print(json.dumps({"text": os.environ["TEXT"]}))')
+CODE=$(curl -s -o /tmp/hnefatafl-say.$$ -w '%{http_code}' -X POST -H "$KEY" -H 'content-type: application/json' -d "$BODY" "$DOOR/say")
+if [ "$CODE" = 204 ]; then echo "said at ${ROOM^^}"; else cat /tmp/hnefatafl-say.$$ >&2; echo >&2; rm -f /tmp/hnefatafl-say.$$; exit 1; fi
+rm -f /tmp/hnefatafl-say.$$