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klayout-gdsfactory

klayout-gdsfactory is a skill for Claude Code from klinkdev2026/klayout-klink. It costs 45 tokens per session (1,701 once invoked), scanned A, original, Apache-2.0.

A bridge between gdsfactory, a Python tool for designing photonic circuits, and KLayout, an application for viewing and checking chip layouts.

In plain words
What is it for?
Use it to connect selected ports, route waveguides, write layout polygons, query geometry, and redo wiring after components move.
Why use it?
It removes manual work when connecting, inspecting, validating, and rerouting photonic layout components.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

not rated 46repo +1 26d ago A scan SkillSpector: pass 45 tokens original Apache-2.0

Good fit Use it to connect selected ports, route waveguides, write layout polygons, query geometry, and redo wiring after components move.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/klinkdev2026/klayout-klink/klayout-gdsfactory
View source ↗ klinkdev2026/klayout-klink klinkdev2026.github.io
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 klinkdev2026/klayout-klink --skill klayout-gdsfactory
Clone the repo
git clone --depth 1 https://github.com/klinkdev2026/klayout-klink

Made for: Claude Code.

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 klayout-gdsfactory

README.md
[![agentmods](https://agentmods.dev/badge/skills/klinkdev2026/klayout-klink/klayout-gdsfactory/github.svg)](https://agentmods.dev/skills/klinkdev2026/klayout-klink/klayout-gdsfactory)
Your own site
<a href="https://agentmods.dev/skills/klinkdev2026/klayout-klink/klayout-gdsfactory"><img src="https://agentmods.dev/badge/skills/klinkdev2026/klayout-klink/klayout-gdsfactory/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.

agentmods 80×15 button for klayout-gdsfactory

Your own site · 80×15
<a href="https://agentmods.dev/skills/klinkdev2026/klayout-klink/klayout-gdsfactory"><img src="https://agentmods.dev/badge/skills/klinkdev2026/klayout-klink/klayout-gdsfactory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,701 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00045 $0.01701
Opus 5.5 $0.00018 $0.00680
Sonnet 5.5 $0.00009 $0.00340
Haiku 4.5 $0.00005 $0.00170

Measured 2mo ago against content hash fb6b8ccf3982, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

klayout-gdsfactory 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 2mo ago.

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.

klink/mcp/skills/klayout-gdsfactory/SKILL.md · 219 lines

How it starts

The opening of the file, as written. The whole thing — 219 lines — stays where its author put it; the contents beside it link to each section on GitHub.

gdsfactory to KLayout Bridge

gdsfactory generates components with Python. This skill adds the KLayout integration layer through klink's klive-compatible port and structured MCP verification.

Click-to-connect on PDK layouts (use these two tools, nothing manual)

When the user wants ports connected on a foundry-PDK layout (blackbox cells with waveguide stub ports), do NOT orchestrate harvest/pairing/routing yourself. Two MCP tools do the whole job and persist state on disk:

  1. User marks intent in KLayout: for each connection, they select ONE or TWO klink Port markers (the labeled triangles) and press the SEND toolbar action. Two markers in one SEND = one pair; single-marker SENDs pair up consecutively.
  2. You call photonics.connect with recent_sends=<number of SENDs>. That is the entire call. It resolves ports exactly from the SEND events, auto-names nets, saves the net table to .klink/specs/, re-harvests ports from live instance positions, routes with gdsfactory, writes polygons, and zooms. Optional style fields: width_um, radius_um, separation_um, route_layer.
  3. After the user MOVES components and asks to redo the wiring, call photonics.reroute with just the cell name (add session if the layout is not in the primary KLayout window). Connection intent is read from the persisted table — you do not need to remember anything.
  4. If a result has ok: false, read problems: each entry states exactly what to do next (usually: tell the user which selection to redo). Never guess pairings yourself.

If port markers are not on screen yet, run port.harvest_blackbox first (cell + tags map, or let photonics.connect auto-tag) so the user has markers to click.

Execution Environment

  • Run in the SAME interpreter that has klink + gdsfactory.
  • KLayout must be running with the klink plugin loaded.
  • c.show() connects to localhost:8082.
  • Always call gf.clear_cache() before regenerating a changed component.

Read the full file on GitHub · 219 lines

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. 2mo ago First seen · 219 lines · 45 tokens per session scan A fb6b8ccf3982

Subscribe to this mod's changes

klayout-gdsfactory is a skill published in the GitHub repository klinkdev2026/klayout-klink (46 stars, last pushed 26d ago), licensed Apache-2.0. It adds 45 tokens to every session and 1,701 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 2026-08-30.

Hardware and IoT
Related

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klayout-gdsfactory next to 6 skills from other repositories
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