Discord alerts for blocked and finished tasks

#!/bin/bash
# taskhold-discord.sh: post to a Discord channel when an agent blocks or finishes a Taskhold task.
# Needs curl and jq. Run: TASKHOLD_API_KEY=atd_sk_... ./taskhold-discord.sh
key=${TASKHOLD_API_KEY:?set TASKHOLD_API_KEY}
board=https://taskhold.com/dashboard/live
last=""

hook=${DISCORD_WEBHOOK_URL:?set DISCORD_WEBHOOK_URL}
notify() { # kind, title, detail, agent
  if [ "$1" = blocked ]; then h="**$4 needs you**"; else h="**$4 finished a task**"; fi
  text=$(printf '%s\n%s\n%s\n%s' "$h" "$2" "${3:+> $3}" "$board")
  jq -n --arg c "$text" '{username: "Taskhold", content: $c[0:2000], allowed_mentions: {parse: []}}' \
    | curl -s -o /dev/null -H "Content-Type: application/json" -d @- "$hook"
}

while :; do
  while IFS= read -r line; do
    case "$line" in
      "id: "*) last=${line#id: } ;;
      "data: "*)
        e=${line#data: }
        # Agents only: a task (not a step) finished, or any task or step blocked.
        jq -e '.type == "task.status" and .actor == "agent" and (.data.to == "blocked" or (.data.to == "done" and .task_id == .root_task_id))' <<<"$e" >/dev/null || continue
        kind=$(jq -r .data.to <<<"$e")
        title=$(jq -r '.task_title // "a task"' <<<"$e")
        agent=$(jq -r '.actor_name // "An agent"' <<<"$e")
        detail=$(jq -r 'if .data.to == "blocked" then .data.blocked_reason else .data.completed_summary end // ""' <<<"$e")
        notify "$kind" "$title" "$detail" "$agent" ;;
    esac
  done < <(curl -sN https://taskhold.com/api/events/stream -H "Authorization: Bearer $key" ${last:+-H "Last-Event-ID: $last"})
  sleep 3
done

DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/... TASKHOLD_API_KEY=atd_sk_... ./taskhold-discord.sh