Claude Skills by lev-os

Brainstorm 5 unique, memorable product names with rationale aligned to brand values and target audience. Use when naming a new product or rebranding. Triggers: product name, name ideas, brand name, naming.

When the user wants to create SEO-driven pages at scale using templates and data. Also use when the user mentions "programmatic SEO," "template pages," "pages at scale," "directory pages," "location pages," "[keyword] + [city] pages," "comparison pages," "integration pages," or "building many pages for SEO." For auditing existing SEO issues, see seo-audit.

Reddit community growth via authentic human-style engagement. Use when finding high-intent posts, checking subreddit rules, writing value-first replies, and reporting run summaries. Works for any app, product, or service targeting a specific community.

When the user wants to create, optimize, or analyze a referral program, affiliate program, or word-of-mouth strategy. Also use when the user mentions 'referral,' 'affiliate,' 'ambassador,' 'word of mouth,' 'viral loop,' 'refer a friend,' or 'partner program.' This skill covers program design, incentive structure, and growth optimization.

SaaS analytics: MRR, churn, behavioral scoring, Monte Carlo, interventions, Stripe/PayPal. Use when building subscription analytics, revenue projections, or admin dashboards.

When the user wants to add, fix, or optimize schema markup and structured data on their site. Also use when the user mentions "schema markup," "structured data," "JSON-LD," "rich snippets," "schema.org," "FAQ schema," "product schema," "review schema," or "breadcrumb schema." For broader SEO issues, see seo-audit.

When the user wants to audit, review, or diagnose SEO issues on their site. Also use when the user mentions "SEO audit," "technical SEO," "why am I not ranking," "SEO issues," "on-page SEO," "meta tags review," or "SEO health check." For building pages at scale to target keywords, see programmatic-seo. For adding structured data, see schema-markup.

When the user wants to optimize signup, registration, account creation, or trial activation flows. Also use when the user mentions "signup conversions," "registration friction," "signup form optimization," "free trial signup," "reduce signup dropoff," or "account creation flow." For post-signup onboarding, see onboarding-cro. For lead capture forms (not account creation), see form-cro.

Generate value proposition statements for marketing, sales, and onboarding from existing value propositions. Triggers: value proposition statements, marketing copy, sales messaging, value statements.

Create engaging Substack Notes that build community and grow subscribers. Use this skill when asked to write Substack Notes, short-form content for Substack, or help with Substack growth strategy. Triggers include requests for Substack Notes, Note ideas, or Substack engagement content.

Comprehensive markdown planning methodology for software projects. Use when starting a new project, creating implementation plans, or refining architecture before coding.

Essential tools and frameworks for modern product management, from discovery to delivery.

Use when you have a spec or requirements for a multi-step task, before touching code

Guide for building production AI agents with Anthropic's Claude Agent SDK. Use when the user wants to create custom agents, implement automation pipelines, add custom tools, configure subagents, or integrate Claude into existing workflows. Triggers on "build an agent", "claude agent sdk", "create automation", "custom tool", "subagent", or "agent pipeline".

[WHAT] Fast, cost-effective inference and fine-tuning for open-source LLMs via OpenAI-compatible APIs [HOW] Serverless inference, on-demand GPU deployments, LoRA fine-tuning (SFT, RFT, DPO), firectl CLI [WHEN] Use when deploying open-source models, fine-tuning for custom use cases, or migrating from OpenAI [WHY] 100+ models, prompt caching, batch inference, multi-LoRA deployments, reinforcement fine-tuning Triggers: "fireworks", "fireworks ai", "fireworks.ai", "firectl", "fireworks api", "fi...

[WHAT] Fast LLM inference via Groq API (chat) + Ollama (embeddings) [HOW] Groq for chat completions (llama-3.3-70b-versatile), Ollama nomic-embed-text for embeddings [WHEN] Need fast inference, embedding text for RAG, chat completions [WHY] Groq provides fastest LLM inference; Ollama handles local embeddings (Groq has no embedding API) Triggers: "groq embed", "groq chat", "groq complete", "embed with groq", "fast llm"

Comprehensive OpenTUI skill for building terminal user interfaces. Covers the core imperative API, React reconciler, and Solid reconciler. Use for any TUI development task including components, layout, keyboard handling, animations, and testing.

Guide developers in building secure APIs by implementing authentication, authorization, input validation, rate limiting, and protection against common vulnerabilities. This skill covers security patterns for REST, GraphQL, and WebSocket APIs.

[WHAT] 4-layer security scanner for untrusted code: static analysis, malware/CVE scanning, Docker sandbox, agentic review. [HOW] Orchestrates rg patterns, ClamAV, pip-audit, osv-scanner, semgrep, Docker strace, and LLM code review. [WHEN] Before running cloned repos, installing pip/npm packages, intake of external code, pre-commit on untrusted PRs, workshop evaluation. [WHY] Agents clone and execute code from the internet. One malicious setup.py and your machine is owned. Triggers: "security...

Perform language and framework specific security best-practice reviews and suggest improvements. Trigger only when the user explicitly requests security best practices guidance, a security review/report, or secure-by-default coding help. Trigger only for supported languages (python, javascript/typescript, go). Do not trigger for general code review, debugging, or non-security tasks.

[WHAT] Unified security skill router — routes to the right security sub-skill based on intent [HOW] Decision tree routes to: security-review (code audit), security-best-practices (language-specific), security-threat-model (threat modeling), security-ownership-map (ownership topology) [WHEN] Use when user mentions security, audit, vulnerability, threat model, OWASP, pentest, code review security, ownership analysis [WHY] Prevents loading 4 separate security skills; routes to the right one base...

Analyze git repositories to build a security ownership topology (people-to-file), compute bus factor and sensitive-code ownership, and export CSV/JSON for graph databases and visualization. Trigger only when the user explicitly wants a security-oriented ownership or bus-factor analysis grounded in git history (for example: orphaned sensitive code, security maintainers, CODEOWNERS reality checks for risk, sensitive hotspots, or ownership clusters). Do not trigger for general maintainer lists o...

This skill ensures all code follows security best practices and identifies potential vulnerabilities.

Scan installed plugins and skills for security risks including malicious code AND malicious natural language instructions. Use /security-scanner to audit before installation.

Repository-grounded threat modeling that enumerates trust boundaries, assets, attacker capabilities, abuse paths, and mitigations, and writes a concise Markdown threat model. Trigger only when the user explicitly asks to threat model a codebase or path, enumerate threats/abuse paths, or perform AppSec threat modeling. Do not trigger for general architecture summaries, code review, or non-security design work.

Decompile any SKILL.md into deterministic YAML for structural security analysis. Extracts permissions, surfaces, risk signals, and produces a scored verdict.

Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, or extract information from web pages.

E2E testing for Next.js + Playwright + Supabase. OAuth bypass via test users, interactive debugging, visual QA. Use when: E2E, Playwright, visual regression, Electron testing.

General-purpose browser automation skill. Write custom Playwright code for any automation task and execute it via the universal executor. **IMPORTANT - Path Resolution:** This skill can be installed in different locations. Before executing any commands, determine the skill directory based on where you loaded this SKILL.md file, and use that path in all commands below. Replace `$SKILL_DIR` with the actual discovered path. Common installation paths: - Plugin system: `~/.claude/plugins/marketpla...

Build conformance test harnesses that verify implementations against specifications. Use when: porting libraries across languages, implementing RFCs/specs, building database engines, validating protocol compliance, cross-platform compatibility, API contract testing, golden file testing, round-trip validation, compliance matrices, differential testing against reference implementations.

Design and implement fuzzing harnesses for crash discovery, security auditing, and correctness verification. Coverage-guided, structure-aware, differential, and grammar-based fuzzing. Use when: testing parsers, protocols, serialization, cryptography, state machines, file formats, or any input-processing code. cargo-fuzz, AFL++, bolero, proptest, libFuzzer, fast-check, sanitizers.

Design and implement metamorphic testing for systems with the oracle problem. Use when: testing ML models, scientific computing, compilers, search engines, databases, graphics pipelines, or any system where correct output is unknown but input-output relationships are predictable. Metamorphic relations, property-based testing, MR taxonomy, oracle-free verification.

Build mock-free integration and E2E tests that hit real databases, real APIs, and real services with structured logging. Use when: replacing mocked tests with real-DB tests, transaction rollback isolation, test data factories, structured JSON-line test logging, webhook simulation, or billing flow verification. Covers Vitest, Supabase, Stripe test mode, and testcontainers.

You MUST use this before any creative work - creating features, building components, adding functionality, or modifying behavior. Explores user intent, requirements and design before implementation.

Generate and operationalize improvement ideas for projects. Use when brainstorming features, planning improvements, creating beads from ideas, or "what should we build next".

Cross-validate decisions using multiple AI models (Codex, Gemini, Grok). Use when "get a second opinion", evaluating approaches, or high-stakes decisions.

Operationalize expert methods into corpus, quote bank, triangulated kernel, operator library, and validators. Use when distilling a methodology or mining session history into executable rules.

When you need structured approaches for effective manager-employee one-on-one meetings

Think at civilization-scale timeframes by asking how decisions look over 10,000 years, countering short-term pathological thinking

Identify highest-impact intervention points in systems ranked from shallow parameters to deep paradigm shifts - prioritize leverage by targeting system goals, rules, information flows, and mental models over superficial numerical adjustments when attempting transformational organizational or policy change

Generate four distinct future scenarios by crossing two high-impact, high-uncertainty variables on perpendicular axes

Simple, visual scenario planning framework mapping two critical uncertainties on perpendicular axes to generate four distinct plausible futures

Ask "why?" five times to drill past symptoms and surface-level causes to reveal the true root cause of a problem

Hamilton Helmer's strategic framework for achieving sustainable competitive advantage through seven distinct power types

Classify highly unusual situations as impossible - but beware of rejecting valid predictions

When you need to understand why reactions don't happen spontaneously despite being energetically favorable

Lower the initial energy barrier required to start new behaviors, projects, or changes to make initiation effortless and inevitable

Recognize how organisms and systems adjust to environmental conditions through evolved traits or learned behaviors that improve fit

Using emotional responses as rapid information shortcuts to judge risks and benefits, often overriding analytical reasoning

Simulates complex systems from the bottom-up by defining simple rules for individual agents and observing emergent patterns from their interactions