tensorcircuit-differentiable

tensorcircuit-differentiable is a skill for Claude Code, Codex from xi-zhao/OpenQuantum. It costs 49 tokens per session (1,254 once invoked), scanned A, original, MIT.

A local quantum-circuit calculator using TensorCircuit and JAX. It returns state amplitudes, probabilities, selected Pauli-observable expectations, and derivatives with respect to chosen rotation angles.

In plain words
What is it for?
Use it to check variational circuits, calculate values such as X or Z measurements and their combinations, and build a Jacobian showing how selected rotation angles affect those values.
Why use it?
It helps evaluate and differentiate ideal parameterized circuits without an optimizer, cloud service, or quantum processor. A derivative is a local numerical result and does not demonstrate training convergence or hardware performance.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to check variational circuits, calculate values such as X or Z measurements and their combinations, and build a Jacobian showing how selected rotation angles affect those values.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xi-zhao/openquantum/tensorcircuit-differentiable
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add xi-zhao/OpenQuantum --skill tensorcircuit-differentiable
Clone the repo
git clone --depth 1 https://github.com/xi-zhao/OpenQuantum

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tensorcircuit-differentiable

README.md
[![agentmods](https://agentmods.dev/badge/skills/xi-zhao/openquantum/tensorcircuit-differentiable/github.svg)](https://agentmods.dev/skills/xi-zhao/openquantum/tensorcircuit-differentiable)
Your own site
<a href="https://agentmods.dev/skills/xi-zhao/openquantum/tensorcircuit-differentiable"><img src="https://agentmods.dev/badge/skills/xi-zhao/openquantum/tensorcircuit-differentiable/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/xi-zhao/openquantum/tensorcircuit-differentiable"><img src="https://agentmods.dev/badge/skills/xi-zhao/openquantum/tensorcircuit-differentiable.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,254 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00049 $0.01254
Opus 5.5 $0.00020 $0.00502
Sonnet 5.5 $0.00010 $0.00251
Haiku 4.5 $0.00005 $0.00125

Measured 3d ago against content hash c7ed4f2284a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tensorcircuit-differentiable scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

The scan reads SKILL.md. This mod also ships 4 executable files (mcp/bridge.py, mcp/contracts.mjs, mcp/server.mjs, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/tensorcircuit-differentiable/SKILL.md · 36 lines

How it starts

The opening of the file, as written. The whole thing — 36 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TensorCircuit-NG 可微分量子线路

原生 SDK 路径

本能力同时支持 TensorCircuit-NG 的原生公开 API。用户需要 自定义电路、张量网络、后端、vmap、梯度与优化 时,由 Agent 在固定依赖环境中编写和运行任务代码,不限于下文便捷 Tool 的预设模型。

使用 node scripts/sdk-access.mjs inspect tensorcircuit-differentiable 定位环境,按完整 SDK 工作流执行。模块导航:tensorcircuit、jax、optax、qiskit、cirq;导航不是 API 白名单。

显式选择 JAX 数值精度和 target;需要 float64 时在建立数组前启用 jax_enable_x64。CPU、GPU 选择按任务与已安装后端决定。

TensorCircuit-NG 1.10.0、Qiskit 2.5.2、JAX 0.7.1 与 NumPy 2.3.5 在独立环境内固定;JAX、Optax 和 Cirq 转换依赖已提供。TensorFlow、PyTorch、CuPy 和 GPU 是上游可选后端,需按目标另备兼容依赖;本机工程检查不覆盖这些后端。

下文关于模型、门集、输入与预算的限制描述便捷 Tool 的合同;原生 SDK 另受上游版本、可选依赖、宿主资源与用户授权约束。已禁用或被拒绝的动作不能借代码路径绕过。执行状态和科研验收分别报告。

当用户需要用 TensorCircuit 计算线路期望、验证变分线路导数或与其他 SDK 交叉对照时,Agent 经 Harness 调用 tensorcircuit_local 提供的 differentiate_tensorcircuit_circuit。本 Skill 指导参数选择与结果解释;计算由 TensorCircuit + JAX CPU 完成。

  • numQubits 与 gates 定义全零初态的理想酉线路。支持 H、X、Y、Z、S、T、RX、RY、RZ、CX、CZ、SWAP;双比特门的 targets 为 [control,target](SWAP 为两个交换位),角度单位 rad。
  • observables 是与量子位数同长的 I/X/Y/Z 字符串,最左字符对应 q0。例如 ZI 表示 Z0,XY 表示 X0Y1;输出期望保留输入顺序。加权 Hamiltonian 可由调用方按系数组合期望和 Jacobian,勿把 Pauli words 当作系数。
  • trainableGateIndices 明确选择 gates 数组中需要求导的 RX/RY/RZ;每项是独立参数。可填空数组只做仿真。Jacobian 行对应 observables,列严格对应该索引数组的顺序,不是所有旋转门的隐含顺序。
  • amplitudes[k] 为 [real,imag],概率向量按 q0 在最左的二进制字典序排列。返回 SDK 原始数值,不裁剪、不归一化;stateNormSquared 用来检查数值漂移。这些是精确线路仿真的数值期望,不是 finite-shots 频数。
  • 参数数量、量子位数和门数由调用方决定;完整输出按 2^N 增长,可寻址数组表示限制仍适用。资源预算通过独立 execution 参数设置,不改变线路语义。
  • OpenQuantum Harness 对大结果自动返回 openquantum-science-summary:先查看 summary.result 中的期望、Jacobian、范数与单位;需要完整态矢量时,用已有文件或 shell Tool 读取会话工作区内的 fullResult.path,再取 JSON 的 result.amplitudes / result.probabilities。omitted: true 表示数据保存在文件中,不表示零值或计算缺失;不要为了获取被省略的数据重新计算。保存失败时仍返回完整输出,科学状态保持 not_evaluated。
  • 固定 TensorCircuit-NG 1.10.0、JAX 0.7.1 和 NumPy 2.3.5,使用 CPU 与 complex128;未开放 GPU、云平台和优化器。
  • 梯度仅对当前输入的理想线路有效,不自动构成优化收敛、抗噪声能力或硬件优势结论。对复杂电路先选择解析可核对例子,必要时与第二 SDK、参数移位或有限差分对照。
  • 当前是 L1,scientificValidation=not_evaluated;成功计算与数值回归不等于最终科学 Acceptance。

Read the full file on GitHub · 36 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago Changed · +2 tokens per session c7ed4f2284a5
  2. 4d ago Changed · +15 lines f6fcfd8c092c
  3. 5d ago Changed · +1 lines 416371978e37
  4. 19d ago First seen · 20 lines · 47 tokens per session scan A d8a0a942b37e

Subscribe to this mod's changes

tensorcircuit-differentiable is a skill published in the GitHub repository xi-zhao/OpenQuantum (75 stars, last pushed yesterday), licensed MIT. It adds 49 tokens to every session and 1,254 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-28.

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