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/salesforce.md

@@ -0,0 +1,150 @@
+# Salesforce
+
+Enterprise CRM platform for sales, service, and marketing.
+
+## Capabilities
+
+| Integration | Available | Notes |
+|-------------|-----------|-------|
+| API | ✓ | REST API, SOAP API, Bulk API |
+| MCP | - | Not available |
+| CLI | ✓ | Salesforce CLI (`sf`) |
+| SDK | ✓ | JSforce, simple-salesforce, etc. |
+
+## Authentication
+
+- **Type**: OAuth 2.0 (Web Server Flow or JWT Bearer)
+- **Header**: `Authorization: Bearer {access_token}`
+- **Instance URL**: Use instance_url from auth response
+
+## Common Agent Operations
+
+### Query records (SOQL)
+
+```bash
+GET https://{instance}.salesforce.com/services/data/v59.0/query?q=SELECT+Id,Name,Email+FROM+Contact+LIMIT+10
+
+Authorization: Bearer {access_token}
+```
+
+### Get record by ID
+
+```bash
+GET https://{instance}.salesforce.com/services/data/v59.0/sobjects/Contact/{record_id}
+
+Authorization: Bearer {access_token}
+```
+
+### Create record
+
+```bash
+POST https://{instance}.salesforce.com/services/data/v59.0/sobjects/Contact
+
+{
+  "FirstName": "John",
+  "LastName": "Doe",
+  "Email": "john@example.com",
+  "AccountId": "{account_id}"
+}
+```
+
+### Update record
+
+```bash
+PATCH https://{instance}.salesforce.com/services/data/v59.0/sobjects/Contact/{record_id}
+
+{
+  "Title": "Senior Developer"
+}
+```
+
+### Search records (SOSL)
+
+```bash
+GET https://{instance}.salesforce.com/services/data/v59.0/search?q=FIND+{searchTerm}+IN+ALL+FIELDS+RETURNING+Contact(Id,Name,Email)
+
+Authorization: Bearer {access_token}
+```
+
+### Get opportunities
+
+```bash
+GET https://{instance}.salesforce.com/services/data/v59.0/query?q=SELECT+Id,Name,Amount,StageName,CloseDate+FROM+Opportunity+WHERE+IsClosed=false
+
+Authorization: Bearer {access_token}
+```
+
+### Describe object
+
+```bash
+GET https://{instance}.salesforce.com/services/data/v59.0/sobjects/Contact/describe
+
+Authorization: Bearer {access_token}
+```
+
+## CLI Commands
+
+```bash
+# Authenticate
+sf org login web
+
+# Query records
+sf data query --query "SELECT Id, Name FROM Account LIMIT 10"
+
+# Create record
+sf data create record --sobject Account --values "Name='New Account'"
+
+# Deploy metadata
+sf project deploy start
+
+# Run Apex
+sf apex run --file script.apex
+```
+
+## SOQL Examples
+
+```sql
+-- Get contacts with accounts
+SELECT Id, Name, Email, Account.Name
+FROM Contact
+WHERE Account.Industry = 'Technology'
+
+-- Get opportunities by stage
+SELECT StageName, COUNT(Id)
+FROM Opportunity
+GROUP BY StageName
+
+-- Get recent leads
+SELECT Id, Name, Company, Status
+FROM Lead
+WHERE CreatedDate = LAST_N_DAYS:30
+ORDER BY CreatedDate DESC
+```
+
+## Key Objects
+
+- **Lead** - Potential customer
+- **Contact** - Person at account
+- **Account** - Company/organization
+- **Opportunity** - Sales deal
+- **Case** - Support ticket
+- **Campaign** - Marketing campaign
+
+## When to Use
+
+- Enterprise CRM operations
+- Complex sales processes
+- Multi-object relationships
+- Custom object management
+- Marketing campaign tracking
+
+## Rate Limits
+
+- 15,000 API calls per 24 hours (Enterprise)
+- Higher limits available
+
+## Relevant Skills
+
+- email-sequence
+- analytics-tracking
+- paid-ads