Execute frontend task implementation with TDD. Read task file, execute steps, verify each, update status. Use this skill when: - User asks to "implement task/plan", "start implementation", "execute plan", or "start coding" - Have task file (story-* or standalone-*) ready to execute - User asks to "use TDD", "write test first", or "test-driven" - User asks to "write tests", "add tests", "create tests" - Fixing UI bugs (write failing test first) TDD Iron Law: NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST TDD Cycle: RED (failing test) → Verify fails → GREEN (minimal code) → Verify passes → REFACTOR Prerequisites: - Task file in docs/reference/frontend/tasks/ (story-* or standalone-*) - Read design-system.md, constraints.md, design spec before coding Flow: Read Task → Read Constraints → Execute Steps → Verify → Test → Update Status

Analyzes closed opportunities to identify patterns between won and lost deals. Compares sales cycles, activities, stakeholder engagement, and deal characteristics for actionable playbook insights. Use when user asks "why are we losing deals", "win loss analysis", "what makes deals win", "analyze lost opportunities", "sales pattern analysis", "compare won vs lost deals", or "improve win rate".

Post-deployment fix: analyze eval set failures, classify root causes, apply targeted fixes, and re-evaluate. For initial build iteration, use /mcs-build (which has an internal fix loop). This skill handles post-deployment edge cases and regressions.

Verify and close stories after frontend/backend tasks are completed. Check ALL related task files, update story acceptance criteria checkboxes. UNIQUE VALUE: Ensures BOTH frontend AND backend tasks are verified before closing story. Prevents premature story closure. Use this skill when: - Frontend or backend notifies "task completed, please verify" - User asks to "verify story", "accept story", "close story", "mark story done" - Need to check if a story can be marked as complete - User asks "is story X done?", "can we close story X?" CRITICAL: Must check BOTH frontend tasks (docs/reference/frontend/tasks/) AND backend tasks (docs/reference/backend/tasks/) before closing. Output: Update story file checkboxes from `- [ ]` to `- [x]`

Privacy-preserving ERC-4337 wallet development for vehicle identity and sensitive data protection. Use when implementing ERC-4337 account abstraction wallets that handle sensitive information (vehicle license plates, biometric data, personal IDs) requiring on-chain privacy. Triggers on requests like "implement ERC-4337 wallet for vehicle", "create privacy-protected account abstraction", "build wallet with vehicle number privacy", "develop ERC-4337 with ZK proof integration", or any smart contract wallet development requiring commitment schemes, deterministic address generation, and sensitive data protection.

Create comprehensive Product Requirements Documents (PRD) that define what to build and why, focusing on goals, scope, user stories, and success criteria without implementation details. Use this skill when: - User asks to "write a PRD", "create PRD", "write requirements document" - User mentions "requirements document", "product requirements", "product spec" - Running /pm.plan command to create version planning document - Starting a new product, major feature, or initiative that needs formal requirements - Need to document goals, scope, user stories, functional requirements, and success criteria Output: ALWAYS write PRD files to docs/reference/pm/versions/{version-name}.md

Design and implement the personality, conversational style, and emotional behavior of the Ethereal "Digital Spirit". Use this skill when updating system prompts, mood logic, or implementing new interactive behaviors. Ensures the spirit remains witty, concise, and mysteriously connected to the system's pulse.

Use `astro:assets` for all images. This enables automatic optimization (resizing, WebP/AVIF conversion, lazy loading).

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.

Fetch PR diff with filtering and line numbers for code review.

Create design documents for Stapledons Voyage game features. Use when user asks to create a design doc, plan a feature, or document game mechanics. Handles both planned/ and implemented/ docs.

Use when you have lint errors, formatting issues, or before committing code to ensure it passes CI.

Batch process books through the complete pipeline - generate cropped images for split pages, OCR all pages, then translate with context. Use when asked to process, OCR, translate, or batch process one or more books.

Next.js 16 Cache Components - PPR, use cache directive, cacheLife, cacheTag, updateTag

Generates customized sales assets including one-pagers, proposals, executive summaries, ROI summaries, and mutual action plans from Dataverse context. Use when user says "create a one-pager", "draft a proposal", "generate executive summary", "build ROI summary", "create mutual action plan", "sales asset for [account]", "proposal outline", or "customer-facing document".

Break down PM story into organized tasks in a single file following LAYERED ARCHITECTURE order: Types → Database → Repository → Service → API → Tests. UNIQUE VALUE: Creates single task file (story-{name}.md) containing all tasks for a story. Tasks are ordered by backend architecture layers. Use this skill when: - Running /backend.tasks command - User asks to "break down story", "create backend tasks", "split into tasks" - Have story at docs/reference/pm/stories/ and need organized task breakdown - Need tasks ordered by backend architecture layers (not random order) - Starting backend work and want organized task list Task order is CRITICAL: Types → Database → Repository → Service → API → Tests Output: Create single file docs/reference/backend/tasks/story-{name}.md with all tasks

Transform requirements into well-structured User Stories using "As a [user], I want [goal], So that [benefit]" format with Given/When/Then acceptance criteria. Use this skill when: - User asks to "write user story", "create story", "add story" - User mentions "user story", "backlog item", "story" - Running /pm.plan and need to break PRD into implementable stories - Creating backlog items for development team - Need to formalize a requirement into standard story format - Converting feature request into actionable story with acceptance criteria Output: ALWAYS write story files to docs/reference/pm/stories/{story-name}.md

Next.js best practices - file conventions, RSC boundaries, data patterns, async APIs, metadata, error handling, route handlers, image/font optimization, bundling

Expert in Claude Agent SDK development. Use when users ask about SDK API, agent configuration, MCP servers, hooks, permissions, file checkpointing, or when they mention @AGENT_SDK_DOCS.md. Provides accurate API reference, code examples with TypeScript types, and best practices.

Run assessment and generate summary report for Java or .NET projects. USE FOR: assess project, analyze codebase, modernization assessment, identify migration issues, modernize assess, scan for upgrade problems, evaluate .NET project, evaluate Java project, find legacy dependencies, generate assessment report. DO NOT USE FOR: creating modernization plans (use modernize-plan-create), executing plans (use modernize-plan-execute).