Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add theYahia/WWmcp --skill viber-fallbackgit clone --depth 1 https://github.com/theYahia/WWmcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/theyahia/wwmcp/viber-fallback)<a href="https://agentmods.dev/skills/theyahia/wwmcp/viber-fallback"><img src="https://agentmods.dev/badge/skills/theyahia/wwmcp/viber-fallback/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/theyahia/wwmcp/viber-fallback"><img src="https://agentmods.dev/badge/skills/theyahia/wwmcp/viber-fallback.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.00584 |
| Opus 5 | $0.00014 | $0.00292 |
| Sonnet 5 | $0.00006 | $0.00117 |
| Haiku 4.5 | $0.00003 | $0.00058 |
Grade A, and why
viber-fallback scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
/viber-fallback — Viber с откатом в SMS
Алгоритм
- Определи номер отправителя. Если пользователь не назвал — вызови
list_numbersи выбери подходящий номер аккаунта. - Вызови
send_viber_messageс to (номер получателя в формате 7XXXXXXXXXX) и text. Viber дешевле SMS и допускает более длинный текст — пробуем его первым. - Если вызов вернул ошибку или получателя нет в Viber — отправь SMS:
send_smsс number (номер получателя), destination (номер или имя отправителя) и text. - Возьми message_id из ответа
send_smsи вызовиget_sms_statusс ним — подтверди доставку. Статус сразу после отправки обычно промежуточный; повтори проверку. - Если и SMS не доставилась — сообщи об этом прямо, с кодом ошибки. Не отправляй третью попытку без запроса пользователя: каждая стоит денег.
- Отчитайся, какой канал сработал и сколько это стоило по каналам.
Формат ответа
## Доставка сообщения
**Получатель**: 79121234567
**Канал 1 — Viber**: не доставлено (нет в Viber)
**Канал 2 — SMS**: доставлено
**message_id**: 8812004471
**Отправитель**: MTSEXOLVE
**Сегментов**: 1
Важно
- Кириллица в SMS переводит сообщение в кодировку UCS-2: 70 символов на сегмент вместо 160. Предупреждай, когда текст выйдет за один сегмент — платить придётся за каждый.
- В Viber ограничение на длину заметно мягче, поэтому каскад имеет смысл только когда текст помещается в оба канала или когда SMS сознательно короче.
- destination — это имя или номер отправителя, зарегистрированный в MTS Exolve. Незарегистрированное имя даст отказ на стороне оператора.
- Рекламные рассылки в РФ требуют согласия получателя. Если текст промо — скажи об этом.
Примеры
/viber-fallback 79121234567 "Ваш заказ №142 готов к выдаче"
/viber-fallback 79001112233 "Код подтверждения: 4819"
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 53 lines · 28 tokens per session scan A 4371a0c6a8ec
viber-fallback is a skill published in the GitHub repository theYahia/WWmcp (29 stars, last pushed 5d ago), licensed MIT. It adds 28 tokens to every session and 584 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.
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