Notify Me Skill

Compose a recurring cron whose action is curl POST https://ntfy.sh/<topic> so the user gets a phone push when a condition is met. Use only when the user has asked for one.

How it works

┌────────────────────────────────────────────────────────────┐
│ Phase 1: Resolve ntfy topic                                │
│   - Read ~/.claude/notify-me-config (topic + base_url)     │
│   - If missing, ask user once and persist                  │
└────────────────────────────────────────────────────────────┘
                             │
                             ▼
┌────────────────────────────────────────────────────────────┐
│ Phase 2: Clarify the condition + message                   │
│   - What event triggers the notification?                  │
│   - What should the push say (title / body / priority)?    │
│   - What polling cadence (defer to watch skill table)      │
└────────────────────────────────────────────────────────────┘
                             │
                             ▼
┌────────────────────────────────────────────────────────────┐
│ Phase 3: Compose watch invocation                          │
│   - Build the check command                                │
│   - Build the action command:                              │
│       curl -d "<msg>" -H "Title: <t>" \                    │
│            -H "Priority: <p>" <base>/<topic>               │
│   - CronCreate with self-cleanup (CronDelete by tag)       │
└────────────────────────────────────────────────────────────┘
                             │
                             ▼
┌────────────────────────────────────────────────────────────┐
│ Phase 4: Confirm + report job ID, topic, cadence           │
└────────────────────────────────────────────────────────────┘

The whole mechanism is one HTTP POST. ntfy.sh delivers the request body as a push notification to every device subscribed to the topic.

curl -s -d "your message body" \
     -H "Title: short header" \
     -H "Priority: 1-5" \
     -H "Tags: white_check_mark" \
     "https://ntfy.sh/<topic>"

The skill wraps that call in a watch-style cron: poll a condition, and only fire the curl when the condition is met. Self-hosted ntfy works the same way - swap https://ntfy.sh for the user's base_url.

Configure (one-time)

Persist the topic in ~/.claude/notify-me-config:

topic=<long-random-name>
base_url=https://ntfy.sh

If the file is missing, ask once via AskUserQuestion:

"What ntfy topic should I publish to? Pick a long random string - it is publicly addressable, treat it as a shared secret. Subscribe on your phone with the same name."

base_url is optional (default https://ntfy.sh); set only for self-hosted ntfy. Subsequent invocations read silently.

User-side: install the ntfy app on the phone, subscribe to the same topic.

Use

When the user asks "notify me when X":

1. Read the topic from the config (ask once if missing).
2. Decide a unique tag for the cron, e.g. notify-pr-5757-merge.
3. Build a check command for the condition (gh, jq, TaskOutput, etc.).
4. CronCreate with this prompt:

Tag: notify-<short-uuid>

Check <CONDITION> with <CHECK COMMAND>.

If MET:
  curl -s -d "<MSG>" \
       -H "Title: <T>" \
       -H "Priority: <1-5>" \
       -H "Tags: <emoji>" \
       "<base_url>/<topic>"
  CronList -> find tag "notify-<short-uuid>" -> CronDelete it.

Else: exit silently.

5. Tell the user the cron job ID + the tag so they can cancel later.

Cadence: defer to the watch skill's interval table. Pick a non-zero, non-30 minute (avoids load spikes). Long-running PR/CI watches: durable: true so the cron survives session restarts.

Tag emojis: white_check_mark (success), x (failure), bell (generic done), eyes (state change).

The CronDelete self-cleanup is mandatory - without it the cron fires forever.

Recipes

PR merged

Tag: notify-pr-N-merge

Check `gh pr view N --repo <repo> --json state -q .state`.

If "MERGED":
  curl -s -d "PR #N merged" -H "Title: GitHub" -H "Tags: white_check_mark" "https://ntfy.sh/<TOPIC>"
  CronList -> CronDelete tag "notify-pr-N-merge".

Else: silent.

Schedule: 7-59/5 * * * *, durable: true.

CI finishes (green or red)

Tag: notify-ci-N

Check `gh pr checks N --repo <repo> --watch=false --json conclusion,name`.

If every check has a non-empty conclusion:
  All SUCCESS:
    curl -s -d "CI green on PR #N" -H "Title: GitHub" -H "Tags: white_check_mark" "https://ntfy.sh/<TOPIC>"
  Any FAILURE:
    curl -s -d "CI failed on PR #N (M failed)" -H "Title: GitHub" -H "Priority: 5" -H "Tags: x" "https://ntfy.sh/<TOPIC>"
  CronList -> CronDelete tag.

Else: silent.

Schedule: 2-59/5 * * * *.

Background bash task done

Tag: notify-build-<id>

Use TaskOutput with task_id "<id>", block: false.

If status == "completed":
  exit 0  -> curl -s -d "Build done" -H "Tags: bell" "https://ntfy.sh/<TOPIC>"
  non-zero -> curl -s -d "Build failed (exit N)" -H "Priority: 5" -H "Tags: x" "https://ntfy.sh/<TOPIC>"
  CronList -> CronDelete tag.

Else: silent.

Schedule: */2 * * * *.

Reminders

• Topic is publicly addressable: don't echo PR bodies, secrets, or paths in the push.
• Always include the CronDelete self-cleanup.
• One cron per condition; don't bundle multiple watches in one prompt.