integrate-hookmyapp

# Integrate HookMyApp HookMyApp is a passthrough for WhatsApp and Instagram: the user keeps their own Meta token inside HookMyApp, HookMyApp forwards inbound messages to their code, and their replies go straight through Meta (it is not a BSP middleman). Outbound sends route through the HookMyApp gateway (`https://gateway.hookmyapp.com/meta/...`): the user's app carries a minted `hmat_` gateway access token, the gateway swaps it for the underlying Meta token server-side, and the path after `/meta` is verbatim Meta Graph API. This skill teaches AI coding agents how to drive the `@gethookmyapp/cli` to integrate a user's app with either a sandbox account (for dev and testing) or their own channel. WhatsApp uses Meta Embedded Signup; Instagram uses direct Instagram OAuth. The CLI owns credential issuance, tunnel lifecycle, and webhook configuration. For a single own-channel integration your code never needs to call the HookMyApp API directly; SaaS builders whose backend must manage customers at runtime use the [REST API](references/api.md). > **Direct Meta access still works.** Integrations that already call `https://graph.facebook.com` with their own Meta token are unaffected. The gateway with a minted `hmat_` access token is the recommended path for new setups: the access token is scoped to one channel and revocable, and the Meta token never leaves HookMyApp. ## Agent Guidance ### Key Principles - **The CLI is the source of truth.** Never embed credentials inline in generat...