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.

The developer inner loop, end to end. Pair through implementation with TDD discipline, self-review before pushing, create a PR with context for reviewers, and process review feedback. Picks up a ready story and carries it across the finish line.

This skill should be used when the user says "implementing", "arness implementing", "start implementing", "execute the plan", "build it", "implement this", "run the tasks", "execute", "start building", "implement the feature", "implement the fix", "quick change", "swift", "swift mode", "quick implementation", "standard", "standard mode", "standard implementation", "start execution", "build the feature", "arn-implementing", or wants to execute an implementation plan, run a quick implementation, a standard-tier implementation, or manage the build-simplify-review cycle. Chains to arn-shipping at completion.

This skill should be used when the user says "migrate infrastructure", "arn infra migrate", "infra migrate", "move to AWS", "move to GCP", "move to Azure", "switch providers", "change cloud provider", "graduate from PaaS", "move from heroku", "move from fly.io", "consolidate providers", "infrastructure migration", "provider migration", "partial migration", "move database", "move services", "arn-infra-migrate", "infrastructure move", "cloud migration", or wants to migrate infrastructure between providers, graduate from PaaS to IaC, consolidate providers, or partially move specific services.

Convert approved HE cognition into small live-ready Linear execution tracking. Use when strategy, reframe, plan, bug, or source-prompt evidence needs scoped issue, milestone, or project routing with explicit confirmation before any live mutation.

Backend Developer Agent. 코드 개발, 디버깅, 기능 구현을 담당합니다. 개발, 코딩, 디버그(debug), 버그 수정, 기능 구현 관련 요청 시 사용됩니다.

Generates end-user friendly release notes and changelogs by analyzing git diffs, consolidating changes, and formatting for Slack and documentation

Generates end-user friendly release notes and changelogs by analyzing git diffs, consolidating changes, and formatting for Slack and documentation

Show implementation progress from linked tasks

Design system management for building and reusing UI components, tokens, and patterns. Use when working with component libraries, design tokens, style guides, or reusable UI patterns to ensure consistency and promote component reuse.

Install Playwright MCP server for browser automation in Claude Code

Ask the user to confirm before taking a significant action. Use before containment, remediation, or other impactful operations to ensure analyst approval. Presents options and waits for response.

Use when reading, editing, or creating files in dlt/_workspace/helpers/dashboard/ or tests/workspace/helpers/dashboard/ or tests/e2e/

Use at the start of any CloudZero cost analysis session to load organization-specific context — custom dimensions, team structures, cost allocation policies, and workflows

Suggests improvements for English language text but does not rewrite the original. Use when asked to correct spelling or wording and the text is English.

Update existing design documents (Design Doc / PRD / ADR) with review

This skill should be used when the user asks about "Next.js with Bun", "Bun and Next", "running Next.js on Bun", "Next.js development with Bun", "create-next-app with Bun", or building Next.js applications using Bun as the runtime.

Write SDD delta specs with requirements and scenarios. Trigger: orchestrator launches spec work for a change.

Create an SDD change proposal with intent, scope, and approach. Trigger: orchestrator launches proposal work for a change.

Analyze repo, tracker, PR, validation, session, and .harness evidence. Use when multi-stage Harness Engineering work needs safe resume routing.