feat: add marketing tools registry for agent discovery

Create centralized tools/ directory with REGISTRY.md index and 29
integration guides covering analytics, SEO, CRM, payments, referral,
email, ads, automation, and commerce platforms.

Each guide includes API endpoints, authentication, common operations,
and links to relevant skills. Updated AGENTS.md and key skills
(referral-program, analytics-tracking, email-sequence, paid-ads)
with tool integration references.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tools/integrations/tolt.md

@@ -0,0 +1,144 @@
+# Tolt
+
+Affiliate program management for SaaS, with Stripe and Paddle integration.
+
+## Capabilities
+
+| Integration | Available | Notes |
+|-------------|-----------|-------|
+| API | ✓ | REST API for affiliates, referrals, payouts |
+| MCP | - | Not available |
+| CLI | - | Not available |
+| SDK | - | JavaScript snippet for tracking |
+
+## Authentication
+
+- **Type**: API Key
+- **Header**: `Authorization: Bearer {api_key}`
+- **Get key**: Settings > API in Tolt dashboard
+
+## Common Agent Operations
+
+### List affiliates
+
+```bash
+GET https://api.tolt.io/v1/affiliates
+```
+
+### Get affiliate
+
+```bash
+GET https://api.tolt.io/v1/affiliates/{affiliate_id}
+```
+
+### Create affiliate
+
+```bash
+POST https://api.tolt.io/v1/affiliates
+
+{
+  "email": "affiliate@example.com",
+  "name": "John Doe"
+}
+```
+
+### List referrals
+
+```bash
+GET https://api.tolt.io/v1/referrals?affiliate_id={affiliate_id}
+```
+
+### Get referral by customer
+
+```bash
+GET https://api.tolt.io/v1/referrals?customer_id={stripe_customer_id}
+```
+
+### List commissions
+
+```bash
+GET https://api.tolt.io/v1/commissions?affiliate_id={affiliate_id}
+```
+
+### Get payout history
+
+```bash
+GET https://api.tolt.io/v1/payouts?affiliate_id={affiliate_id}
+```
+
+### Update affiliate
+
+```bash
+PATCH https://api.tolt.io/v1/affiliates/{affiliate_id}
+
+{
+  "commission_rate": 30,
+  "payout_method": "paypal",
+  "paypal_email": "affiliate@paypal.com"
+}
+```
+
+## JavaScript Tracking
+
+### Install snippet
+
+```html
+<script src="https://cdn.tolt.io/tolt.js" data-tolt="YOUR_PUBLIC_KEY"></script>
+```
+
+### Track signup
+
+```javascript
+window.tolt.signup(stripeCustomerId);
+```
+
+### Identify existing customer
+
+```javascript
+window.tolt.identify(stripeCustomerId);
+```
+
+## Webhook Events
+
+| Event | When |
+|-------|------|
+| `affiliate.created` | New affiliate registered |
+| `affiliate.approved` | Affiliate approved |
+| `referral.created` | New referral tracked |
+| `referral.converted` | Referral converted to customer |
+| `commission.created` | Commission earned |
+| `payout.completed` | Payout sent |
+
+## Key Features
+
+- **Stripe native** - Automatic commission tracking
+- **Paddle support** - Works with Paddle billing
+- **Affiliate dashboard** - White-labeled portal
+- **Payout automation** - PayPal and Wise payouts
+- **Custom commission tiers** - Different rates per affiliate
+
+## Key Objects
+
+- **Affiliate** - Partner in your program
+- **Referral** - Tracked conversion
+- **Commission** - Earned affiliate payment
+- **Payout** - Processed payment to affiliate
+- **Program** - Campaign configuration
+
+## When to Use
+
+- Setting up SaaS affiliate programs
+- Managing affiliate relationships
+- Tracking Stripe or Paddle-based referrals
+- Processing affiliate payouts
+- Building affiliate dashboards
+
+## Rate Limits
+
+- 100 requests per minute
+- Higher limits on enterprise plans
+
+## Relevant Skills
+
+- referral-program
+- pricing-strategy