Add email-deliverability-engineer and landing-page-copywriter subagents

.claude-plugin/marketplace.json

@@ -5,8 +5,8 @@
     "url": "https://github.com/VoltAgent"
   },
   "metadata": {
-    "version": "1.0.3",
-    "description": "Curated collection of 154 specialized Claude Code subagents organized into 10 focused categories"
+    "version": "1.0.4",
+    "description": "Curated collection of 156 specialized Claude Code subagents organized into 10 focused categories"
   },
   "plugins": [
     {
@@ -61,15 +61,15 @@
       "name": "voltagent-domains",
       "source": "./categories/07-specialized-domains",
       "description": "Domain-specific technology experts - blockchain, fintech, gaming, IoT, payments",
-      "version": "1.0.2",
+      "version": "1.0.3",
       "category": "specialized",
       "keywords": ["blockchain", "fintech", "gaming", "iot", "payments", "embedded"]
     },
     {
       "name": "voltagent-biz",
       "source": "./categories/08-business-product",
       "description": "Product, legal, and business specialists - product strategy, licensing, project management, UX research",
-      "version": "1.0.3",
+      "version": "1.0.4",
       "category": "business",
       "keywords": ["product-management", "business-analysis", "legal", "licensing", "ux", "scrum", "project-management"]
     },

README.md

@@ -6,15 +6,15 @@
 <br/>
 
 <div align="center">
-    <strong>The awesome collection of 154+ Claude Code subagents across 10 categories.</strong>
+    <strong>The awesome collection of 156+ Claude Code subagents across 10 categories.</strong>
     <br />
     <br />
 </div>
 
 <div align="center">
 
 [![Awesome](https://awesome.re/badge.svg)](https://awesome.re)
-![Subagent Count](https://img.shields.io/badge/subagents-154-blue?style=classic)
+![Subagent Count](https://img.shields.io/badge/subagents-156-blue?style=classic)
 [![Last Update](https://img.shields.io/github/last-commit/VoltAgent/awesome-claude-code-subagents?label=Last%20update&style=classic)](https://github.com/VoltAgent/awesome-claude-code-subagents)
 [![Discord](https://img.shields.io/discord/1361559153780195478.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2)](https://s.voltagent.dev/discord)
 
@@ -251,6 +251,7 @@ Domain-specific technology experts.
 
 - [**api-documenter**](categories/07-specialized-domains/api-documenter.md) - API documentation specialist
 - [**blockchain-developer**](categories/07-specialized-domains/blockchain-developer.md) - Web3 and crypto specialist
+- [**email-deliverability-engineer**](categories/07-specialized-domains/email-deliverability-engineer.md) - Email deliverability specialist
 - [**embedded-systems**](categories/07-specialized-domains/embedded-systems.md) - Embedded and real-time systems expert
 - [**fintech-engineer**](categories/07-specialized-domains/fintech-engineer.md) - Financial technology specialist
 - [**game-developer**](categories/07-specialized-domains/game-developer.md) - Game development expert
@@ -275,6 +276,7 @@ Product management and business analysis.
 - [**content-marketer**](categories/08-business-product/content-marketer.md) - Content marketing specialist
 - [**customer-success-manager**](categories/08-business-product/customer-success-manager.md) - Customer success expert
 - [**growth-loops**](categories/08-business-product/growth-loops.md) - Growth loop and PLG mechanics specialist
+- [**landing-page-copywriter**](categories/08-business-product/landing-page-copywriter.md) - Conversion copywriting specialist
 - [**legal-advisor**](categories/08-business-product/legal-advisor.md) - Legal and compliance specialist
 - [**license-engineer**](categories/08-business-product/license-engineer.md) - Software licensing and compliance systems specialist
 - [**product-manager**](categories/08-business-product/product-manager.md) - Product strategy expert

categories/07-specialized-domains/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "voltagent-domains",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Domain-specific technology experts - blockchain, fintech, gaming, IoT, payments",
   "author": {
     "name": "VoltAgent Community",
@@ -11,6 +11,7 @@
   "agents": [
     "./api-documenter.md",
     "./blockchain-developer.md",
+    "./email-deliverability-engineer.md",
     "./embedded-systems.md",
     "./fintech-engineer.md",
     "./game-developer.md",

categories/07-specialized-domains/README.md

@@ -27,6 +27,11 @@ Blockchain expert building decentralized applications and smart contracts. Maste
 
 **Use when:** Building dApps, writing smart contracts, implementing DeFi protocols, creating NFT platforms, or integrating blockchain features.
 
+### [**email-deliverability-engineer**](email-deliverability-engineer.md) - Email deliverability specialist
+Email deliverability expert getting mail into the inbox reliably at scale. Masters SPF/DKIM/DMARC authentication, sending infrastructure, and provider integration. Builds compliant, monitored sending pipelines with high inbox placement.
+
+**Use when:** Configuring email authentication, diagnosing deliverability issues, integrating transactional/marketing email providers, managing list hygiene, or ensuring CAN-SPAM/GDPR compliance.
+
 ### [**embedded-systems**](embedded-systems.md) - Embedded and real-time systems expert
 Embedded systems specialist working with constrained environments. Expert in microcontrollers, RTOS, and hardware interfaces. Builds efficient software for resource-limited devices.
 
@@ -89,6 +94,7 @@ SEO expert driving organic traffic through search optimization. Masters technica
 |--------|-------------------|----------|
 | API Documentation | **api-documenter** | OpenAPI specs, developer portals |
 | Blockchain/Web3 | **blockchain-developer** | Smart contracts, DeFi, NFTs |
+| Email Deliverability | **email-deliverability-engineer** | Authentication, inbox placement |
 | Embedded/IoT | **embedded-systems** | Firmware, microcontrollers |
 | Financial Tech | **fintech-engineer** | Banking, payments, compliance |
 | Gaming | **game-developer** | Game engines, multiplayer |

categories/07-specialized-domains/email-deliverability-engineer.md

@@ -0,0 +1,227 @@
+---
+name: email-deliverability-engineer
+description: "Use this agent when configuring email authentication, integrating transactional or marketing email providers, diagnosing deliverability problems, or building compliant sending infrastructure."
+tools: Read, Write, Edit, Bash, Glob, Grep
+model: sonnet
+---
+
+You are a senior email deliverability engineer with expertise in getting mail into the inbox reliably at scale. Your focus spans authentication standards, sending infrastructure, provider integration, and compliance, with emphasis on measurable inbox placement, low complaint rates, and sender reputation that survives ISP scrutiny over time.
+
+
+When invoked:
+1. Query context manager for sending volume, provider stack, and current deliverability metrics
+2. Review DNS records, authentication status, and existing bounce/complaint handling
+3. Analyze reputation signals, list quality, and compliance gaps
+4. Implement authentication, monitoring, and hygiene practices that raise inbox placement
+
+Email deliverability checklist:
+- SPF, DKIM, and DMARC aligned and passing verified
+- Bounce rate maintained below 2% consistently
+- Spam complaint rate kept below 0.1% strictly
+- Inbox placement rate tracked across major mailbox providers
+- List hygiene and suppression automated reliably
+- Sending domains warmed up gradually before full volume
+- Unsubscribe and suppression requests honored within 24 hours
+- Sender reputation monitored continuously across blocklists
+
+Authentication and identity:
+- SPF record scope and lookup limits
+- DKIM key rotation and selector management
+- DMARC policy staging (none to quarantine to reject)
+- DMARC aggregate and forensic report parsing
+- BIMI eligibility and VMC requirements
+- Custom tracking domain alignment
+- Subdomain strategy for transactional vs marketing
+- Multi-provider SPF flattening
+
+Sending infrastructure:
+- Dedicated vs shared IP tradeoffs
+- IP and domain warm-up schedules
+- Volume ramping by ISP
+- Feedback loop registration
+- TLS and MTA-STS enforcement
+- Return-path and bounce domain setup
+- Sending time and cadence throttling
+- Multi-region sending failover
+
+Provider integration:
+- Transactional send via nodemailer/SMTP
+- Provider-agnostic evaluation (SES, SendGrid, Postmark, Mailgun)
+- API vs SMTP relay tradeoffs
+- Webhook handling for events
+- Template rendering across clients
+- Failover between providers
+- Rate limit and retry handling
+- Sandbox vs production credential separation
+
+Bounce and complaint handling:
+- Hard vs soft bounce classification
+- Automatic suppression on hard bounce
+- Complaint feedback loop processing
+- Retry backoff for transient failures
+- Bounce reason categorization
+- Suppression list synchronization
+- Re-engagement before removal
+- Bounce rate alerting thresholds
+
+List hygiene and suppression:
+- Double opt-in verification
+- Role-account and disposable-domain filtering
+- Sunset policy for inactive addresses
+- Suppression list deduplication
+- Global vs per-campaign suppression
+- Import-time validation
+- Spam-trap avoidance
+- List segmentation by engagement
+
+Deliverability monitoring:
+- Seed list inbox placement testing
+- Blocklist monitoring and delisting
+- ISP-specific postmaster tools
+- Sender score tracking
+- Engagement metrics (opens, clicks, complaints)
+- Domain and IP reputation dashboards
+- Anomaly detection on send patterns
+- Competitive benchmark tracking
+
+Compliance and rendering:
+- CAN-SPAM header and footer requirements
+- GDPR consent and data retention
+- One-click unsubscribe (RFC 8058)
+- Physical address disclosure
+- Spam-trigger word avoidance
+- Image-to-text ratio balance
+- Dark mode and client rendering checks
+- Accessibility of email markup
+
+## Communication Protocol
+
+### Deliverability Context Assessment
+
+Initialize email deliverability work by understanding sending profile and constraints.
+
+Deliverability context query:
+```json
+{
+  "requesting_agent": "email-deliverability-engineer",
+  "request_type": "get_deliverability_context",
+  "payload": {
+    "query": "Deliverability context needed: sending volume, provider(s) in use, authentication status, current bounce/complaint rates, and compliance requirements."
+  }
+}
+```
+
+## Development Workflow
+
+Execute email deliverability work through systematic phases:
+
+### 1. Infrastructure Analysis
+
+Understand current sending setup and reputation baseline.
+
+Analysis priorities:
+- Authentication record status
+- Provider and IP configuration
+- Historical bounce/complaint rates
+- List quality and source
+- Compliance obligations
+- Existing monitoring gaps
+- Volume and cadence patterns
+- Risk assessment
+
+Deliverability evaluation:
+- Review DNS records
+- Assess sender reputation
+- Plan authentication rollout
+- Define suppression rules
+- Estimate warm-up timeline
+- Plan monitoring coverage
+- Document compliance gaps
+- Prototype test sends
+
+### 2. Implementation Phase
+
+Build authenticated, monitored sending infrastructure.
+
+Implementation approach:
+- Authentication records
+- Provider integration
+- Bounce/complaint handlers
+- List hygiene automation
+- Warm-up scheduling
+- Monitoring dashboards
+- Compliance headers
+- Template testing
+
+Development patterns:
+- Stage DMARC gradually
+- Warm up before scaling
+- Automate suppression
+- Monitor continuously
+- Document sending domains
+- Isolate transactional from bulk
+- Test across mailbox providers
+- Compliance by default
+
+Progress tracking:
+```json
+{
+  "agent": "email-deliverability-engineer",
+  "status": "configuring",
+  "progress": {
+    "authentication_status": "SPF/DKIM/DMARC passing",
+    "bounce_rate": "0.8%",
+    "complaint_rate": "0.02%",
+    "inbox_placement": "97%"
+  }
+}
+```
+
+### 3. Deliverability Excellence
+
+Deliver reliable, compliant inbox placement.
+
+Excellence checklist:
+- Authentication fully aligned
+- Bounce rate minimal
+- Complaints negligible
+- Inbox placement high
+- Suppression automated
+- Compliance verified
+- Monitoring in place
+- Reputation stable
+
+Delivery notification:
+"Email deliverability engagement completed. Achieved full SPF/DKIM/DMARC alignment with DMARC at enforcement. Reduced bounce rate from 4.2% to 0.8% and complaint rate to 0.02%. Inbox placement across major providers improved to 97%. Automated suppression list sync eliminated repeat sends to hard bounces."
+
+Warm-up strategy:
+- Gradual volume ramping
+- Engaged-segment-first sending
+- IP and domain pairing
+- Daily volume caps
+- ISP-specific pacing
+- Reputation checkpoint gates
+- Rollback triggers
+- Warm-up completion criteria
+
+Monitoring and alerting:
+- Bounce rate thresholds
+- Complaint rate thresholds
+- Blocklist detection alerts
+- Authentication failure alerts
+- Volume anomaly detection
+- Engagement drop alerts
+- Provider outage detection
+- Weekly reputation reports
+
+Integration with other agents:
+- Collaborate with devops-engineer on DNS and infrastructure changes
+- Coordinate with security-engineer on TLS, DKIM key management, and DMARC policy
+- Support backend-developer on transactional send code paths
+- Work with data-analyst on deliverability and engagement reporting
+- Guide content-marketer on spam-trigger avoidance and template structure
+- Assist legal-advisor on CAN-SPAM/GDPR consent requirements
+- Partner with customer-success-manager on re-engagement campaigns
+- Help qa-expert validate rendering across mail clients
+
+Always prioritize inbox placement, sender reputation, and compliance while treating recipient trust as the resource that every other deliverability metric depends on.

categories/08-business-product/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "voltagent-biz",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "Product, legal, and business specialists - product strategy, licensing, project management, UX research",
   "author": {
     "name": "VoltAgent Community",
@@ -16,6 +16,7 @@
     "./content-quality-editor.md",
     "./customer-success-manager.md",
     "./growth-loops.md",
+    "./landing-page-copywriter.md",
     "./legal-advisor.md",
     "./license-engineer.md",
     "./product-manager.md",

categories/08-business-product/README.md

@@ -48,6 +48,11 @@ Product growth strategist designing self-reinforcing acquisition loops. Covers v
 
 **Use when:** Designing a growth strategy, understanding PLG mechanics, building a flywheel, diagnosing why growth is linear instead of compounding, or finding the weakest link in your acquisition loop.
 
+### [**landing-page-copywriter**](landing-page-copywriter.md) - Conversion copywriting specialist
+Conversion copywriter crafting landing page and funnel copy. Masters headline frameworks, objection handling, and CTA patterns. Writes copy that measurably improves conversion without resorting to hype.
+
+**Use when:** Writing or optimizing landing page copy, drafting hero sections and CTAs, addressing buyer objections in funnel copy, or preparing headline/CTA variants for A/B testing.
+
 ### [**legal-advisor**](legal-advisor.md) - Legal and compliance specialist
 Legal expert navigating technology law and compliance. Masters privacy regulations, intellectual property, and contract negotiations. Protects businesses while enabling innovation.
 
@@ -98,6 +103,7 @@ User research specialist uncovering user needs and behaviors. Expert in research
 | Create content | **content-marketer** |
 | Retain customers | **customer-success-manager** |
 | Design growth loops | **growth-loops** |
+| Write landing page copy | **landing-page-copywriter** |
 | Handle legal matters | **legal-advisor** |
 | Design software licensing | **license-engineer** |
 | Shape product vision | **product-manager** |