docs(channel-skills): rewrite all 13 /add-*-v2 skills for copy-from-channels-branch pattern

Each skill now:
- Pre-flight: checks for file present + import line + dep listed (idempotent)
- git fetch origin channels
- git show origin/channels:<paths> > <paths> to copy adapter (and helpers/tests/setup-step where applicable)
- Append `import './<chan>.js';` to src/channels/index.ts
- pnpm install <pkg>@<pinned-version>
- pnpm run build

Telegram additionally copies 4 helper/test files + setup/pair-telegram.ts
and registers `'pair-telegram':` in setup/index.ts STEPS.

WhatsApp (native) additionally copies setup/whatsapp-auth.ts and
registers `'whatsapp-auth':` in setup/index.ts STEPS, installs
@whiskeysockets/baileys + qrcode + @types/qrcode pinned.

All credential / next-steps / channel-info / troubleshooting sections
preserved verbatim.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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

@@ -7,22 +7,48 @@ description: Add GitHub channel integration to NanoClaw v2 via Chat SDK. PR and
 
 Adds GitHub support to NanoClaw v2 using the Chat SDK bridge. The agent participates in PR and issue comment threads.
 
-## Pre-flight
-
-Check if `src/channels/github.ts` exists and the import is uncommented in `src/channels/index.ts`. If both are in place, skip to Credentials.
-
 ## Install
 
+v2 trunk doesn't ship channels. This skill copies the GitHub adapter in from the `channels` branch.
+
+### Pre-flight (idempotent)
+
+Skip to **Credentials** if all of these are already in place:
+
+- `src/channels/github.ts` exists
+- `src/channels/index.ts` contains `import './github.js';`
+- `@chat-adapter/github` is listed in `package.json` dependencies
+
+Otherwise continue. Every step below is safe to re-run.
+
+### 1. Fetch the channels branch
+
 ```bash
-pnpm install @chat-adapter/github
+git fetch origin channels
 ```
 
-Uncomment the GitHub import in `src/channels/index.ts`:
+### 2. Copy the adapter
+
+```bash
+git show origin/channels:src/channels/github.ts > src/channels/github.ts
+```
+
+### 3. Append the self-registration import
+
+Append to `src/channels/index.ts` (skip if the line is already present):
 
 ```typescript
 import './github.js';
 ```
 
+### 4. Install the adapter package (pinned)
+
+```bash
+pnpm install @chat-adapter/github@4.26.0
+```
+
+### 5. Build
+
 ```bash
 pnpm run build
 ```