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Found 345 Skills
Calculate construction costs using DDC CWICR resource-based methodology. Break down costs into labor, materials, equipment with transparent pricing.
Go testing patterns for production-grade code: subtests, test helpers, fixtures, golden files, httptest, testcontainers, property-based testing, and fuzz testing. Covers mocking strategies, test isolation, coverage analysis, and test design philosophy. Use when writing tests, improving coverage, reviewing test quality, setting up test infrastructure, or choosing a testing approach. Trigger examples: "add tests", "improve coverage", "write tests for this", "test helpers", "mock this dependency", "integration test", "fuzz test". Do NOT use for performance benchmarking methodology (use go-performance-review), security testing (use go-security-audit), or table-driven test patterns specifically (use go-test-table-driven).
Design products around price using Madhavan Ramanujam's "Monetizing Innovation" methodology—determine willingness to pay before you build, not after. Use when: **Set pricing for a new product** before or during development; **Validate willingness to pay** before investing in features; **Structure pricing tiers** (Good-Better-Best) for different segments; **Choose the right monetization model** (subscription, usage-based, freemium, etc.); **Diagnose why a product isn't monetizing** as expected
Competitor comparison and alternative page creation for SEO and sales enablement. Covers 4 page formats (singular alternative, plural alternatives, vs pages, competitor vs competitor), content architecture, research methodology, and centralized competitor data management.
Use when the user needs research methodology, long-form content creation, academic-style citations, fact-checking, or evidence-based writing with proper source attribution. Trigger conditions: whitepaper drafting, research article writing, source evaluation, citation management, fact-checking protocol, case study creation, evidence-based argumentation.
Business analysis expert who drives project discovery, market research, and requirements validation within the BMAD methodology
Reconnaissance and methodology playbook. Use when mapping assets, discovering endpoints, fingerprinting technology, and building a structured testing plan for a new target.
Karl Marx's thinking framework and critical methodology. Epistemological principles, decision heuristics, rhetorical devices and polemic engines are extracted from 17 core works, to analyze social phenomena, economic issues and political events from Marx's perspective. Trigger WHEN: "from Marx's perspective", "what would Marx think", "Marx mode", "historical materialism analysis", "help me analyze from Marx's angle", "switch to Marx".
Orchestrate the full one-person company workflow across all OPC skills. It is used when Codex needs to start, continue, or review the complete One Person Company (OPC) methodology process, read prior outputs from `opc-doc/`, determine the user's familiarity with relevant concepts and preferred interaction mode, explain terms when needed, ask one question at a time, offer user-selectable options, and summarize the next concrete action for Chinese-speaking users.
Design-driven development methodology. The design/ directory is the single source of architectural truth — read it before coding, stay within its boundaries, and when the system's shape needs to change, update the design first. Use this skill whenever starting any development work on this project. Also use when the user asks to: create or update architecture docs, add a new module or feature that might cross existing boundaries, refactor system structure, or understand the codebase architecture. Trigger on phrases like "design first", "update the design", "does this change the architecture", "write a design for", "what's the current design", or when onboarding to understand a codebase's shape. Supports arguments: `/design-driven init` to configure a project for design-driven development, `/design-driven bootstrap` to generate design from an existing codebase.
Apply event study methodology to measure abnormal returns and cumulative abnormal returns (CAR) around corporate or market events. Use this skill when the user needs to quantify the market impact of announcements, design event and estimation windows, or when they ask 'did this event affect stock price', 'how do I calculate abnormal returns', or 'what is the market reaction to this announcement'.
Build marketing that people actually want using Seth Godin's Permission Marketing methodology—earn attention instead of demanding it, turning strangers into friends and friends into customers. Use when: **Build an email list** that's engaged and valuable; **Design lead magnets** that earn real permission; **Create content strategy** based on earning attention; **Evaluate marketing tactics** for permission vs. interruption; **Improve email marketing** by increasing anticipation and relevance