v2: add Chat SDK channel adapters and skills for 11 platforms

Thin wrapper adapters + SKILL.md for Slack, Telegram, GitHub, Linear,
Google Chat, Teams, WhatsApp Cloud API, Resend, Matrix, Webex, iMessage.
All follow the same pattern as discord-v2.ts: readEnvFile → create*Adapter
→ createChatSdkBridge → registerChannelAdapter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.claude/skills/add-resend-v2/SKILL.md

@@ -0,0 +1,79 @@
+---
+name: add-resend-v2
+description: Add Resend (email) channel integration to NanoClaw v2 via Chat SDK.
+---
+
+# Add Resend Email Channel (v2)
+
+This skill adds email support via Resend to NanoClaw v2 using the Chat SDK bridge.
+
+## Phase 1: Pre-flight
+
+Check if `src/channels/resend-v2.ts` exists and the import is uncommented in `src/channels/index.ts`. If both are in place, skip to Phase 3.
+
+## Phase 2: Apply Code Changes
+
+### Install the adapter package
+
+```bash
+npm install @resend/chat-sdk-adapter
+```
+
+### Enable the channel
+
+Uncomment the Resend import in `src/channels/index.ts`:
+
+```typescript
+import './resend-v2.js';
+```
+
+### Build
+
+```bash
+npm run build
+```
+
+## Phase 3: Setup
+
+### Create Resend credentials
+
+> 1. Go to [resend.com](https://resend.com) and create an account
+> 2. Add and verify your sending domain
+> 3. Go to **API Keys** and create a new key
+> 4. Set up a webhook:
+>    - Go to **Webhooks** > **Add webhook**
+>    - URL: `https://your-domain/webhook/resend`
+>    - Events: select **email.received** (for inbound email)
+>    - Copy the signing secret
+
+### Configure environment
+
+Add to `.env`:
+
+```bash
+RESEND_API_KEY=re_...
+RESEND_FROM_ADDRESS=bot@yourdomain.com
+RESEND_FROM_NAME=NanoClaw
+RESEND_WEBHOOK_SECRET=your-webhook-secret
+```
+
+Sync to container: `mkdir -p data/env && cp .env data/env/env`
+
+### Build and restart
+
+```bash
+npm run build
+launchctl kickstart -k gui/$(id -u)/com.nanoclaw  # macOS
+# systemctl --user restart nanoclaw  # Linux
+```
+
+## Phase 4: Verify
+
+> Send an email to the configured from address. The bot should respond via email within a few seconds.
+
+## Removal
+
+1. Comment out `import './resend-v2.js'` in `src/channels/index.ts`
+2. Remove `RESEND_API_KEY`, `RESEND_FROM_ADDRESS`, `RESEND_FROM_NAME`, `RESEND_WEBHOOK_SECRET` from `.env`
+3. `npm uninstall @resend/chat-sdk-adapter`
+4. Rebuild and restart