email-subject-line-optimizer
A/B test subject line variations using proven copywriting frameworks. Predict open rates based on historical performance.
Open source Repository Open in the app JSON README (API)
About
A/B test subject line variations using proven copywriting frameworks. Predict open rates based on historical performance.
Details
- Kind
- Agent skills
- Topic
- Communication
- Publisher
- onewave-ai
- Origin
- majiayu
- Category
- ferramentas
- Stars
- 10
- Forks
- 43
- Last push
- 2026-08-11T06:26:32Z
- Repository state
- ativo
- Language
- Python
- License
- MIT
- Added
- 2026-09-01 17:05:41
- Updated
- 2026-09-01 17:05:41
- Origin id
onewave-ai/claude-skills/email-subject-line-optimizer@main
README
# Claude Skills Library Production-ready skills for Claude Code. Built and maintained by [OneWave AI](https://www.onewave-ai.com) -- AI consulting for small and mid-size businesses. **205 skills** across three pillars: **business** (sales, marketing, consulting, ops), **everyday life** (personal finance, travel, fitness, job hunting), and **coding** (engineering, design, AI agent architecture). Companion repo: **[Open Agent Stack](https://github.com/OneWave-AI/open-agent-stack)** -- 27 artifacts that need more than a single file. Highlights: **[vibe-stack](https://github.com/OneWave-AI/open-agent-stack/tree/main/plugins/vibe-stack)** (14 skills: idea to shipped app, with a real motion system and an AI-slop detector), **[sales-desk](https://github.com/OneWave-AI/open-agent-stack/tree/main/plugins/sales-desk)** (the rep's whole daily loop), and **[7 design-token themes](https://github.com/OneWave-AI/open-agent-stack/tree/main/design-styles)**. Skills here stay single-file and zero-dependency; anything with a manifest, a team, or a build step lives there. --- ## Featured: /agent-army Deploy 3 to 50+ independent Claude agents in parallel, each with its own 1M token context window. Each agent spawns sub-agents underneath. A top-tier commander (Fable or Opus) orchestrates the swarms, and you pick a power level -- Max Power, Heavy, Balanced, or Economy -- that sets the Opus/Sonnet/Haiku model mix for each layer. The system runs in waves -- execute, audit, propagate -- and checks its own work between each. Built for tasks where one agent isn't enough: large refactors, full-site audits, bulk content generation, codebase migrations. Battle-tested on 60+ concurrent agents in a single session. **[View agent-army](https://github.com/OneWave-AI/claude-skills/tree/main/agent-army)** --- ## Getting Started ```bash # Claude Code: install a single skill claude skill install OneWave-AI/claude-skills/<skill-name> # Or clone the full library git clone https://github.com/OneWave-AI/claude-skills.git ~/.claude/skills # OpenAI Codex CLI (same files, unchanged) git clone https://github.com/OneWave-AI/claude-skills.git ~/.codex/skills ``` Each skill is a self-contained `SKILL.md` file. No dependencies, no build step. These skills follow the [Agent Skills open standard](https://agentskills.io), so the same files work unchanged in **Claude Code, OpenAI Codex CLI, Gemini CLI, Cursor**, and 30+ other tools -- point your tool's skills directory at the clone and go. --- ## Categories ### AI Agent Architecture Skills for building, orchestrating, and managing autonomous AI agents. | Skill | Description | |-------|-------------| | `agent-army` | 2-layer parallel agent hierarchy for large tasks at maximum speed | | `agent-to-agent` | A2A communication protocol -- message passing, shared context, handoffs | | `agent-swarm-deployer` | Deploy swarms of sub-agents for massive parallel data processing | | `agent-team-builder` | Design and deploy custom agent teams for business workflows | | `sub-agent-orchestrator` | Parent/child agent orchestration with task delegation | | `scout` | Recommends the best skill for any task | | `scout-pro` | Enhanced scout with skill chains, pattern recognition, usage learning | | `skill-navigator` | Guide to all skills with combination recommendations | | `skill-composer-studio` | Chain multiple skills into custom workflows | ### Anthropic / Claude Products Skills built around specific Anthropic product releases. | Skill | Description | |-------|-------------| | `overnight-repo-auditor` | Uses Managed Agents (14.5hr runtime) for autonomous overnight codebase audits | | `multi-agent-client-onboarding` | Agent SDK: 3 parallel agents for client assessment | | `gmail-to-crm-pipeline` | MCP Connectors: Gmail to CRM lead qualification pipeline | | `full-codebase-migrator` | 1M context window: ingest entire codebases for migration planning | | `claude-design-system-architect` | Generate a premium design system (tokens, type, motion) exported to Tailwind/CSS | | `claude-landing-composer` | Build premium animated landing pages in Next.js + Framer Motion, anti-template | | `claude-design-critic` | Audit a UI and de-AI it — design + copy fixes toward editorial/premium | ### Claude Cowork Folder-first knowledge-worker workflows built for Claude Cowork -- now with cloud sessions, scheduled tasks that run with no device online, and Microsoft 365 write tools (July 2026). | Skill | Description | |-------|-------------| | `cowork-deal-room` | Multi-step deal room due diligence -- contracts, financials, risk scoring | | `cowork-folder-organizer` | Turn a messy folder or shared drive into an organized, indexed workspace with an undo trail | | `cowork-inbox-triage` | Daily inbox sweep -- classify, draft replies in your voice, queue follow-ups; scheduled-task ready | | `cowork-hiring-screener` | Score a folder of resumes against the JD -- ranked shortlist with evidence, interview kits, drafts | | `cowork-expense-audit` | Reconcile receipts to statements, categorize, flag policy violations, output the expense report | | `cowork-rfp-response` | Shred an RFP into a compliance matrix, mine your past proposals, draft the response honestly | | `cowork-invoice-chaser` | AR aging report plus escalating dunning drafts matched to invoice age; weekly scheduled task | | `cowork-contract-renewal-radar` | Extract every auto-renew clause and notice window, calendar the real decision deadlines | | `cowork-data-room-builder` | Prep YOUR data room for a raise or acquisition -- checklist, gap report, organized structure | | `cowork-vendor-comparison` | Normalize vendor quotes into one matrix -- true TCO, buried terms, negotiation leverage | | `cowork-qbr-builder` | Client folder -> QBR with value receipts, honest misses, health read, expansion asks | | `cowork-sop-writer` | Turn a process walkthrough into a clean SOP -- steps, decision points, tribal knowledge captured | | `cowork-calendar-defrag` | Measure meeting load and fragmentation, propose cuts and focus blocks, draft the decline messages | | `cowork-tax-prep-organizer` | Sweep folders for tax docs, build the CPA-ready package and the missing-form chase list | | `cowork-medical-bill-auditor` | Match bills to EOBs, catch overbilling and unsubmitted claims, draft dispute letters | | `cowork-home-inventory` | Photos + receipts -> insurance-grade home inventory with values, serials, and the gap list | ### Sales and Revenue | Skill | Description | |-------|-------------| | `deal-closer-playbook` | Closing strategy with buying committee mapping and objection handling | | `renewal-predictor` | Predict renewal likelihood from health score signals | | `expansion-revenue-finder` | Identify upsell and cross-sell opportunities in existing accounts | | `pipeline-health-analyzer` | Identify stalled deals, predict close probability | | `deal-review-framework` | MEDDIC/BANT deal assessment with risk scoring | | `deal-momentum-analyzer` | Score deal velocity from engagement patterns | | `sales-forecast-builder` | Weighted pipeline forecast with scenario modeling | | `sales-call-prep-assistant` | Pre-call research briefs with discovery questions | | `sales-methodology-implementer` | MEDDIC, BANT, Sandler, Challenger, SPIN implementation | | `lead-scoring-model` | Build custom lead scoring from historical win/loss data | | `inbound-lead-qualifier` | Score inbound leads by ICP fit, intent, and urgency | | `cold-email-sequence-generator` | Multi-touch outbound campaigns optimized for response | | `personalization-at-scale` | Personalized first lines for hundreds of prospects | | `champion-identifier` | Find internal champions in target accounts | | `intent-signal-aggregator` | Monitor buyer intent signals across the web | | `objection-pattern-detector` | Mine lost deals for recurring objection patterns | | `lookalike-customer-finder` | Find companies matching your best customer profile | | `quota-setting-calculator` | Top-down vs bottom-up quota models | | `sales-comp-plan-designer` | Variable compensation design with accelerators | | `sales-coaching-plan-generator` | Individualized rep development plans | | `ramping-rep-tracker` | 30/60/90/120 day ramp milestones | | `rep-performance-scorecard` | Multi-dimensional rep evaluation | | `territory-planning-optimizer` | Account assignment by revenue potential | | `icp-deep-scanner` | Read-only deep scan of connected tools → data-grounded ICP + persona library | | `customer-panel-of-experts` | Your buyer personas debate any decision (launch, price, product) and recommend | | `prospect-panel-simulator` | Simulate prospects to pressure-test emails, decks, and pages before sending | | `pricing-change-strategist` | Plan a price increase: segmentation, scenarios, grandfathering, full comms kit | ### Consulting and Professional Services | Skill | Description | |-------|-------------| | `client-proposal-generator` | Full consulting proposals from a brief | | `sow-generator` | Professional Statements of Work with legal boilerplate | | `client-health-dashboard` | RAG status across all client accounts | | `churn-autopsy` | Post-mortem analysis when a client churns | | `onboarding-checklist` | Customized client onboarding plans | | `ai-readiness-assessment` | Assess how ready a business is for AI adoption | | `saas-replacement-planner` | Evaluate which SaaS tools can be replaced with AI agents | | `roi-calculator` | AI implementation ROI with sensitivity analysis | | `meeting-intelligence` | Extract decisions, action items, and sentiment from transcripts | | `meeting-to-tasks` | Convert transcripts to action items with owner assignment | | `weekly-business-report` | Auto-generated weekly KPI reports | ### Engineering and DevOps | Skill | Description | |-------|-------------| | `code-review-pro` | Security, performance, and best practices review | | `debug-like-expert` | Methodical investigation with hypothesis testing | | `api-load-tester` | Progressive load testing with bottleneck analysis | | `database-migrator` | Cross-provider database migration with validation | | `incident-responder` | Production incident response automation | | `runbook-generator` | Operational runbooks from codebase analysis | | `data-pipeline-builder` | ETL/ELT pipeline design and implementation | | `dependency-auditor` | Security vulnerabilities and outdated packages | | `test-coverage-improver` | Find and fill test coverage gaps | | `docker-debugger` | Container troubleshooting and optimization | | `typescript-migrator` | JavaScript to TypeScript migration | | `env-setup-wizard` | Environment variable management | | `error-boundary-creator` | React error boundaries and fallback UIs | | `git-pr-reviewer` | Pull request quality review | | `regex-debugger` | Visual regex breakdown and debugging | | `performance-profiler` | Application performance profiling | | `api-endpoint-scaffolder` | REST API endpoint generation | | `react-component-generator` | React components with TypeScript and a11y | | `database-schema-designer` | Optimized schemas with ERD diagrams | | `landing-page-optimizer` | Conversion and performance optimization | ### Design Systems and UI Build, install, and enforce design systems. Pairs with the 7 ready-made design-token themes in [Open Agent Stack `design-styles/`](https://github.com/OneWave-AI/open-agent-stack/tree/main/design-styles) -- aurora-mesh, cirrus, liquid-glass, mono-brutalist, neo-terminal, sand-terra, tidal. | Skill | Description | |-------|-------------| | `design-style-installer` | Install a complete token theme (from Open Agent Stack or local tokens.json) and repaint the project | | `design-tokens-sync` | Find and fix token drift -- stale copies, hardcoded values, orphans -- plus a CI guard | | `motion-language-designer` | Duration/easing scales, choreography rules, signature moves -> Framer Motion + CSS | | `dark-mode-converter` | Real dark mode via semantic tokens and elevation logic, not naive inversion | | `typography-scale-builder` | Fluid type scale with per-step line-height/tracking, roles, vertical rhythm | | `design-system-generator` | Design tokens, components, documentation | | `css-animation-creator` | Professional animations and micro-interactions | | `responsive-layout-builder` | CSS Grid, Flexbox, container queries | | `screenshot-to-code` | Convert UI screenshots to working code | | `color-palette-extractor` | Extract palettes from images or sites -- HEX/RGB/Tailwind/CSS variables | | `font-pairing-suggester` | Font pairings with hierarchy and loading strategy | | `brand-consistency-checker` | Scan documents and slides for off-brand colors, fonts, logos | | `accessibility-auditor` | WCAG compliance audit and fixes | ### Security and Compliance | Skill | Description | |-------|-------------| | `compliance-checker` | GDPR, HIPAA, SOC2, CCPA, PCI-DSS audit | | `security-pentest-planner` | Penetration test planning (OWASP Top 10) | | `tech-due-diligence` | Technical due diligence for M&A/investment | | `contract-analyzer` | Review contracts for concerning clauses | | `contract-redliner` | Generate redline suggestions with replacement language | ### Marketing and Content | Skill | Description | |-------|-------------| | `seo-optimizer` | Keyword analysis, readability, competitor comparison | | `seo-keyword-cluster-builder` | Topic cluster architecture | | `landing-page-copywriter` | High-converting copy using PAS, AIDA, StoryBrand | | `brand-voice-analyzer` | Extract and codify brand voice from existing content | | `content-repurposer` | Transform content into 8+ formats | | `social-repurposer` | Adapt content for different platforms | | `social-selling-content-generator` | LinkedIn thought leadership posts | | `linkedin-post-optimizer` | Professional narrative with hooks | | `utm-parameter-generator` | Standardized UTM tracking | | `competitor-content-analyzer` | Track competitor content strategy | | `competitor-price-tracker` | Monitor competitor pricing changes | | `competitor-intel-agent` | Comprehensive competitor monitoring | | `customer-review-aggregator` | Aggregate and analyze reviews from G2, Capterra, etc. | | `podcast-content-suite` | Transform podcasts into content marketing | | `webinar-content-repurposer` | Webinar to blog, social, email | | `email-template-generator` | Professional email templates | | `email-subject-line-optimizer` | A/B test subject lines | | `product-launch-war-room` | Adversarial GTM war room: go/no-go, risk register, phased rollout, kill criteria | | `hyperframes-ad-director` | Brief → finished HyperFrames video ad: hook, script, storyboard, scenes, cuts | | `hyperframes-sales-demo-builder` | Personalized product-demo videos in HyperFrames for a specific account | | `hyperframes-explainer-builder` | URL or docs → tight 60-90s product explainer with walkthrough scenes and VO | | `hyperframes-testimonial-builder` | Real reviews and case-study results → social-proof videos: spotlights, review walls, proof reels | | `hyperframes-local-promo` | 15-30s local-business promos: menu drops, offers, events, hiring clips | ### Strategy and Finance | Skill | Description | |-------|-------------| | `pricing-strategy` | Pricing model design with competitive analysis | | `market-sizing` | TAM/SAM/SOM with top-down and bottom-up estimates | | `pitch-deck-reviewer` | Investor deck review with scoring | | `board-deck-generator` | Board meeting presentation content | | `investor-update-writer` | Monthly/quarterly investor updates | | `executive-dashboard-generator` | Data to executive-ready reports | | `financial-parser` | Extract data from invoices, receipts, statements | | `portfolio-analyzer` | Investment portfolio risk and diversification | | `budget-optimizer` | Spending analysis and savings strategies | | `financial-goal-planner` | Savings targets and investment strategies | | `tax-strategy-optimizer` | Pre-tax, Roth, charitable giving optimization | ### Operations and People | Skill | Description | |-------|-------------| | `workflow-automator` | Design automated workflows from manual processes | | `okr-generator` | OKRs following Google/Intel methodology | | `customer-journey-mapper` | Full journey from first touch to advocacy | | `hiring-scorecard` | Structured scorecards for any role | | `knowledge-base-builder` | FAQ identification and tutorial creation | | `technical-writer` | User guides, architecture docs, onboarding materials | | `doc-coauthoring` | Structured documentation co-authoring workflow | | `job-application-optimizer` | Tailor resumes to job postings | | `raise-negotiation-prep` | Salary research and negotiation scripts | ### Small Business Essentials The problems that actually kill small businesses -- cash, margins, visibility, people, the lease. | Skill | Description | |-------|-------------| | `cash-flow-forecaster` | 13-week rolling cash forecast from bank exports and AR/AP -- crunch weeks circled with the levers to pull | | `job-profitability-analyzer` | Which clients and jobs actually make money -- loaded labor costs, effective hourly rate per client | | `local-seo-optimizer` | Win the Google local pack -- Business Profile audit, review engine, NAP sweep, location pages | | `review-response-writer` | Respond to every review in the owner's voice -- gracious 5-stars, masterful 1-stars, escalation flags | | `employee-handbook-builder` | Plain-English handbook that matches how the business actually runs, with state-law check flags | | `inventory-reorder-planner` | Sales history -> reorder points, this week's purchase list, and the dead-stock cash report | | `job-post-writer` | Job posts the right person actually applies to -- pruned requirements, honest sell, pay handled | | `commercial-lease-analyzer` | True all-in occupancy cost, the small-tenant trap clauses, and the negotiation ask list | --- ## Skill Format Every skill is a single `SKILL.md` file with YAML frontmatter: ```yaml --- name: skill-name # required — kebab-case, matches the folder description: What the skill does and when to use it. # required — drives auto-selection tools: Read, Write, Bash, Agent # optional — restrict tool access; omit to inherit all model: inherit # optional — pin a model; omit to inherit the session model --- # Skill prompt content here... ``` Claude Code loads this as a system prompt when the skill is invoked. Only `name` and `description` are required; most skills here use just those two. The `description` is what Claude reads to decide when to trigger the skill, so make it specific. --- ## About OneWave AI [OneWave AI](https://www.onewave-ai.com) is a boutique AI consulting firm based in Florida, specializing in Claude and the Anthropic ecosystem. We help small and mid-size businesses implement AI that ships real results -- from Claude for Enterprise deployment to custom agent architecture. - [Claude Bootcamp & Team Training](https://www.onewave-ai.com/claude-bootcamp) -- in-person and virtual bootcamps, trainings, and workshops built on your real workflows - [AI Training for Your Team](https://www.onewave-ai.com/ai-training) -- custom Claude + ChatGPT curriculum, then we deploy the tools you were trained on - [Claude Consulting](https://www.onewave-ai.com/claude-consulting) - [Services](https://www.onewave-ai.com/services) - [Blog](https://www.onewave-ai.com/blog) - [Contact](https://www.onewave-ai.com/contact) --- ## Contributing 1. Fork the repository 2. Create a new folder with your skill name 3. Add a `SKILL.md` following the format above 4. Submit a pull request Skills should be production-ready, well-documented, and solve a real problem. No placeholder or stub skills. --- ## License MIT