Borrowing it
Nothing to install: this file belongs to DingyangLyu/MatClaw. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/DingyangLyu/MatClaw/main/.claude/skills/add-whatsapp/SKILL.mdgit clone --depth 1 https://github.com/DingyangLyu/MatClawWrote 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/dingyanglyu/matclaw/add-whatsapp)<a href="https://agentmods.dev/skills/dingyanglyu/matclaw/add-whatsapp"><img src="https://agentmods.dev/badge/skills/dingyanglyu/matclaw/add-whatsapp/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/dingyanglyu/matclaw/add-whatsapp"><img src="https://agentmods.dev/badge/skills/dingyanglyu/matclaw/add-whatsapp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00030 | $0.02518 |
| Opus 5 | $0.00015 | $0.01259 |
| Sonnet 5 | $0.00006 | $0.00504 |
| Haiku 4.5 | $0.00003 | $0.00252 |
Grade C, and why
add-whatsapp scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf store/auth/ How it starts
The opening of the file, as written. The whole thing — 346 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add WhatsApp Channel
This skill adds WhatsApp support to MatClaw. It installs the WhatsApp channel code, dependencies, and guides through authentication, registration, and configuration.
Phase 1: Pre-flight
Check current state
Check if WhatsApp is already configured. If store/auth/ exists with credential files, skip to Phase 4 (Registration) or Phase 5 (Verify).
ls store/auth/creds.json 2>/dev/null && echo "WhatsApp auth exists" || echo "No WhatsApp auth"
Detect environment
Check whether the environment is headless (no display server):
[[ -z "$DISPLAY" && -z "$WAYLAND_DISPLAY" && "$OSTYPE" != darwin* ]] && echo "IS_HEADLESS=true" || echo "IS_HEADLESS=false"
Ask the user
Use AskUserQuestion to collect configuration. Adapt auth options based on environment:
If IS_HEADLESS=true AND not WSL → AskUserQuestion: How do you want to authenticate WhatsApp?
- Pairing code (Recommended) - Enter a numeric code on your phone (no camera needed, requires phone number)
- QR code in terminal - Displays QR code in the terminal (can be too small on some displays)
Otherwise (macOS, desktop Linux, or WSL) → AskUserQuestion: How do you want to authenticate WhatsApp?
- QR code in browser (Recommended) - Opens a browser window with a large, scannable QR code
- Pairing code - Enter a numeric code on your phone (no camera needed, requires phone number)
- QR code in terminal - Displays QR code in the terminal (can be too small on some displays)
If they chose pairing code:
AskUserQuestion: What is your phone number? (Include country code without +, e.g., 1234567890)
Phase 2: Verify Code
Apply the skill to install the WhatsApp channel code and dependencies:
npx tsx scripts/apply-skill.ts .claude/skills/add-whatsapp
Verify the code was placed correctly:
test -f src/channels/whatsapp.ts && echo "WhatsApp channel code present" || echo "ERROR: WhatsApp channel code missing — re-run skill apply"
What ships with it
10 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- add/setup/whatsapp-auth.ts 10 KB runs code
- add/src/channels/whatsapp.test.ts 27 KB runs code
- add/src/channels/whatsapp.ts 12 KB runs code
- add/src/whatsapp-auth.ts 5.6 KB runs code
- manifest.yaml 594 B
- modify/setup/index.ts 1.6 KB runs code
- modify/setup/index.ts.intent.md 145 B
- modify/src/channels/index.ts 193 B runs code
- modify/src/channels/index.ts.intent.md 267 B
- tests/whatsapp.test.ts 2.6 KB runs code
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.
- 9d ago First seen · 346 lines · 30 tokens per session scan C 42f939b80d03
add-whatsapp is a skill published in the GitHub repository DingyangLyu/MatClaw (90 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 30 tokens to every session and 2,518 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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