# Qector: Bringing a 15-back end Rust quantum decoder to Claude Desktop

> Source: <https://github.com/GuillaumeLessard/qector-claude-plugin>
> Published: 2026-08-19 20:50:13+00:00

**Professional Claude Code & Claude Desktop Integration**

QECTOR is a high-performance, strictly verified quantum error correction engineering and research environment built for `qector-decoder-v3`

. By mathematically enforcing

This repository provides the official integration for **Claude Code** and **Claude Desktop (Windows/macOS/Linux)**, completely offline with zero-egress security.

**1. Clone and Install**

```
git clone https://github.com/GuillaumeLessard/qector-claude-plugin.git
cd qector-claude-plugin
python -m pip install -r requirements.txt
python scripts/qector_runtime_check.py
```

**2. Claude Desktop GUI Installer (Windows)**
Instantly registers QECTOR as a first-class Extension inside Claude Desktop Settings.

```
.\scripts\install_windows_connector.cmd
```

**3. Claude Code Marketplace Integration**

```
claude plugin marketplace add GuillaumeLessard/qector-claude-plugin
claude plugin install qector@qector-tools
```

**MCP Servers**
Two local stdio Model Context Protocol (MCP) servers run against the `qector-decoder-v3`

core:

`qector-library`

(8 stable tools): Core decoding, code generation, and licensing.`qector-bench`

(29 research tools): Threshold sweeps, Stim/DEM analysis, Wilson intervals, Sinter shims, and system setup.

**Claude Desktop Extension**
Fully integrated custom connector extension (`manifest_version: 0.3`

). Displays native UI controls, documentation, and the QECTOR icon directly within Claude Desktop's **Settings → Connectors** menu.

**Commands (13 Slash Commands)**

-
`/qec-desktop-connector`

: Zero-friction Claude Desktop MCP configuration. -
`/qec-setup`

: Guided first-time setup and diagnostic audit. -
`/qec-facts`

: Quick reference for codes, decoders, and strict-math rules. -
`/qec-theorem`

: Formulations and proof obligations for Theorems 1-16. -
`/qec-reproduce`

: Reference manual Appendix D reproduction workflows. -
`/qec-decode`

: Single-shot syndrome decoding asserting parity. -
`/qec-threshold-sweep`

: LER sweeps with exact Wilson 95% confidence intervals. -
`/qec-wilson`

: Wilson 95% score interval calculator. -
`/qec-dem`

: Detector Error Models (DEM) and Stim circuit inspection. -
`/qec-code-inspect`

: Verify code parameters$[[n,k,d]]$ and check matrices. -
`/qec-benchmark`

: Decoder latency and throughput microbenchmarks. -
`/qec-sinter`

: Sinter task templates and benchmark configuration. -
`/qec-validate-mcp`

: Validate tool schemas, JSON-RPC transport, and health.

**Agents (5 Specialized Personas)**

`qec-researcher`

: Academic research, paper reproduction, threshold sweeps.`qec-developer`

: Code integration, API design, performance tuning.`qec-validator`

: Formal verification, mathematical proof checking.`qec-sysadmin`

: Operations, zero-egress monitoring, incident response.`qec-hardware-engineer`

: Physical qubit characterization, cryogenic constraints.

**Skills (28 Domain Primitives)**
Comprehensive instruction sets covering `qector-core`

, `qector-architecture`

, `qector-bp-osd`

, `qector-codes-builder`

, `qector-math-foundations`

, `qector-orchestration`

, `qector-sinter`

, `qector-dem-pipeline`

, and more.

-
**Mathematical Strictness**: Every single syndrome decoding must verify$H c \equiv s \pmod 2$ . Approximations are rejected. -
**Zero-Egress Security**: Operations run 100% locally. The plugin never transmits QEC simulation telemetry to the cloud, protecting proprietary hardware IP. -
**Fail-Closed Design**: Mismatched matrix dimensions, unrecognized code families, or invalid distance requests immediately raise deterministic errors rather than silently corrupting the quantum state. -
**Statistical Rigor**: All LER threshold sweeps include exact Wilson 95% binomial score intervals. Point estimates without bounds are rejected.

**Requirements**: Python 3.10+, `qector-decoder-v3==1.0.0`

, `mcp==1.2.0`

, `numpy`

.
**Documentation**: See the `QECTOR_Reference_Manual_v1.0.0.pdf`

(DOI: 10.5281/zenodo.21941046).