# Backend Selector

> Multi-backend comparison and selection skill for optimal hardware choice

- Skill: `a5c-ai/backend-selector` (Agent Skill)
- Install (CLI): `npx skillmds@latest add a5c-ai/backend-selector`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/backend-selector/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/backend-selector

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# Backend Selector

## Purpose

Provides expert guidance on comparing and selecting quantum backends across multiple providers based on circuit requirements and performance criteria.

## Capabilities

- Backend capability comparison
- Queue time estimation
- Cost optimization
- Fidelity-based ranking
- Connectivity analysis
- Job prioritization
- Provider API integration
- Historical performance tracking

## Usage Guidelines

1. **Requirements Analysis**: Determine circuit qubit and gate requirements
2. **Backend Query**: Fetch available backends from all providers
3. **Filtering**: Eliminate backends that cannot support circuit
4. **Ranking**: Score backends by fidelity, queue time, and cost
5. **Selection**: Choose optimal backend for execution

## Tools/Libraries

- Qiskit
- Amazon Braket
- Cirq
- Azure Quantum SDK
- pytket