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-webex-v2/SKILL.md

@@ -0,0 +1,75 @@
+---
+name: add-webex-v2
+description: Add Webex channel integration to NanoClaw v2 via Chat SDK.
+---
+
+# Add Webex Channel (v2)
+
+This skill adds Cisco Webex support to NanoClaw v2 using the Chat SDK bridge.
+
+## Phase 1: Pre-flight
+
+Check if `src/channels/webex-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 @bitbasti/chat-adapter-webex
+```
+
+### Enable the channel
+
+Uncomment the Webex import in `src/channels/index.ts`:
+
+```typescript
+import './webex-v2.js';
+```
+
+### Build
+
+```bash
+npm run build
+```
+
+## Phase 3: Setup
+
+### Create Webex Bot
+
+> 1. Go to [developer.webex.com](https://developer.webex.com/my-apps/new/bot)
+> 2. Create a new bot and copy the **Bot Access Token**
+> 3. Set up a webhook:
+>    - Use the Webex API to create a webhook pointing to `https://your-domain/webhook/webex`
+>    - Or use the Webex Developer Portal
+>    - Set a webhook secret for signature verification
+
+### Configure environment
+
+Add to `.env`:
+
+```bash
+WEBEX_BOT_TOKEN=your-bot-token
+WEBEX_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
+
+> Add the bot to a Webex space or send it a direct message. The bot should respond within a few seconds.
+
+## Removal
+
+1. Comment out `import './webex-v2.js'` in `src/channels/index.ts`
+2. Remove `WEBEX_BOT_TOKEN` and `WEBEX_WEBHOOK_SECRET` from `.env`
+3. `npm uninstall @bitbasti/chat-adapter-webex`
+4. Rebuild and restart