feat: add 23 new CLI tools and integration guides

New tools across 13 categories:
- Email/Newsletter: beehiiv, klaviyo, postmark, brevo, activecampaign
- Data Enrichment: clearbit, apollo
- CRO/Testing: hotjar, optimizely
- Analytics: plausible
- Scheduling: calendly, savvycal
- Forms: typeform
- Messaging: intercom
- Social: buffer
- Video: wistia
- Payments: paddle
- Affiliate: partnerstack
- Reviews: trustpilot, g2
- Push: onesignal
- Webinar: demio, livestorm

Each tool includes a zero-dependency CLI and integration guide.
Registry and CLI README updated with all new entries.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tools/integrations/buffer.md

@@ -0,0 +1,138 @@
+# Buffer
+
+Social media scheduling, publishing, and analytics platform for managing multiple social profiles.
+
+## Capabilities
+
+| Integration | Available | Notes |
+|-------------|-----------|-------|
+| API | ✓ | REST API v1 for profiles, updates, scheduling |
+| MCP | - | Not available |
+| CLI | ✓ | [buffer.js](../clis/buffer.js) |
+| SDK | - | No official SDK; legacy API still supported |
+
+## Authentication
+
+- **Type**: OAuth 2.0 Bearer Token
+- **Header**: `Authorization: Bearer {access_token}`
+- **Get key**: Register app at https://buffer.com/developers/apps then complete OAuth flow
+- **Note**: Buffer is no longer accepting new developer app registrations; existing apps continue to work. New public API is in development at https://buffer.com/developer-api
+
+## Common Agent Operations
+
+### Get user info
+
+```bash
+GET https://api.bufferapp.com/1/user.json
+
+Authorization: Bearer {token}
+```
+
+### List connected profiles
+
+```bash
+GET https://api.bufferapp.com/1/profiles.json
+
+Authorization: Bearer {token}
+```
+
+### Get profile posting schedules
+
+```bash
+GET https://api.bufferapp.com/1/profiles/{profile_id}/schedules.json
+```
+
+### Create a scheduled post
+
+```bash
+POST https://api.bufferapp.com/1/updates/create.json
+Content-Type: application/x-www-form-urlencoded
+
+profile_ids[]={profile_id}&text=Your+post+content&scheduled_at=2026-03-01T10:00:00Z
+```
+
+### Get pending updates for a profile
+
+```bash
+GET https://api.bufferapp.com/1/profiles/{profile_id}/updates/pending.json?count=25
+```
+
+### Get sent updates for a profile
+
+```bash
+GET https://api.bufferapp.com/1/profiles/{profile_id}/updates/sent.json?count=25
+```
+
+### Publish a pending update immediately
+
+```bash
+POST https://api.bufferapp.com/1/updates/{update_id}/share.json
+```
+
+### Delete an update
+
+```bash
+POST https://api.bufferapp.com/1/updates/{update_id}/destroy.json
+```
+
+### Reorder queue
+
+```bash
+POST https://api.bufferapp.com/1/profiles/{profile_id}/updates/reorder.json
+Content-Type: application/x-www-form-urlencoded
+
+order[]={update_id_1}&order[]={update_id_2}&order[]={update_id_3}
+```
+
+## API Pattern
+
+Buffer API v1 uses `.json` extensions on all endpoints. POST requests use `application/x-www-form-urlencoded` content type. Array parameters use bracket notation (e.g., `profile_ids[]`).
+
+Responses include a `success` boolean for mutation operations.
+
+## Key Metrics
+
+### Profile Metrics
+- `followers` - Follower count for connected profile
+- `service` - Platform name (twitter, facebook, instagram, linkedin, etc.)
+
+### Update Metrics (sent updates)
+- `statistics.reach` - Post reach
+- `statistics.clicks` - Link clicks
+- `statistics.retweets` - Retweets/shares
+- `statistics.favorites` - Likes/favorites
+- `statistics.mentions` - Mentions
+
+## Parameters
+
+### Update Create Parameters
+- `profile_ids[]` - Required. Array of profile IDs to post to
+- `text` - Required. Post content
+- `scheduled_at` - ISO 8601 timestamp for scheduling
+- `now` - Set to `true` to publish immediately
+- `top` - Set to `true` to add to top of queue
+- `shorten` - Set to `true` to auto-shorten links
+- `media[photo]` - URL to photo attachment
+- `media[thumbnail]` - URL to thumbnail
+- `media[link]` - URL for link attachment
+
+## When to Use
+
+- Scheduling social media posts across multiple platforms
+- Managing social media content queues
+- Analyzing post performance across channels
+- Automating social media publishing workflows
+- Coordinating team social media activity
+
+## Rate Limits
+
+- 60 authenticated requests per user per minute
+- Exceeding returns HTTP 429
+- Higher limits available by contacting hello@buffer.com
+
+## Relevant Skills
+
+- social-media-calendar
+- content-repurposing
+- social-proof
+- launch-sequence