harmonia

Implements and modifies backend/server-side code with adaptive rigor. Use for APIs, services, jobs, auth, data access, schemas/migrations, queues, integrations, webhooks, config, observability, tests, and production fixes. Calibrates depth from fast spike to production-critical or data/security-critical work, choosing only the verification needed for the real risk.

Evidence-first code review and bugfix investigation skill. Use for PR review, code review, vulnerability isolation, regression debugging, root-cause analysis, and proposing or applying minimal correct fixes across frontend, backend, API, data, infrastructure, security, performance, dependencies, and tests. Produces domain-specific findings with proof, impact, root cause, fix, regression test, and verification evidence. Do not use for greenfield implementation without a review or bug investigation goal.

Use this skill when a development agent needs external research, prior art, open-source examples, official documentation, architecture alternatives, debugging clues, dependency evaluation, or a fresh angle after an idea crisis. Adapts depth from quick scout for drafts/spikes to deep evidence review for architecture, security, data, migrations, public APIs, dependency adoption, and production-critical decisions. Do not use for simple local edits that can be solved from the repository context alone.

Build, redesign, or review frontend UI with distinctive, product-specific visual direction and production-quality implementation. Use for landing pages, dashboards, SaaS apps, web apps, components, design systems, Tailwind, shadcn/ui, React, Next.js, Vue, Svelte, and any request for beautiful, premium, polished, non-generic, memorable, bespoke, unusual, adaptive, responsive, accessible, or "not AI-looking" UI. Also use for UI critique, typography, color, layout, motion, component architecture, and design-system decisions.

Maintain a single agent-readable project source of truth during development, bugfixing, decisions, and release preparation. Use when code, architecture, behavior, bugs, trade-offs, operations, tests, APIs, schemas, dependencies, or release state change; creates/updates PROJECT_CONTEXT.md, decision records, bugfix records, changelog/release notes, and verifies documentation is current before release.

Use this skill for production-grade DevOps, platform, infrastructure, CI/CD, containers, Kubernetes, cloud, observability, backup/DR, and zero-downtime deployment work. This skill is intentionally strict and non-adaptive: no quick-and-dirty production DevOps changes.

Evidence-first code review and bugfix investigation skill. Use for PR review, code review, vulnerability isolation, regression debugging, root-cause analysis, and proposing or applying minimal correct fixes across frontend, backend, API, data, infrastructure, security, performance, dependencies, and tests. Produces domain-specific findings with proof, impact, root cause, fix, regression test, and verification evidence. Do not use for greenfield implementation without a review or bug investigation goal.