hdldiagZero vs Arm MCP Server
hdldiagZero is a plugin bundle for AI coding tools published by lcapossio. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). Arm MCP Server is an MCP server published by arm. Marketplaces we read that list it: 2 (Official MCP Registry, Docker MCP Catalog). As of our marketplace pass on 2026-10-14. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  hdldiagZero |  Arm MCP Server |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.2.10 Forks (GitHub): 1 Stars (GitHub): 26 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 2.4.0 Forks (GitHub): 20 Stars (GitHub): 91 Not marked · First seen |
| Docker MCP Catalog | Not listed | Listed Version: sha256:ea7c4d1daeb9 Forks (GitHub): 20 Stars (GitHub): 91 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | hdldiagZero | Arm MCP Server |
|---|---|---|
| Marketplaces that list it (differs) | 1 (worse) | 2 (better) |
| Stars (GitHub) (differs) | 26 (worse) | 91 (better) |
| Forks (GitHub) (differs) | 1 (worse) | 20 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (docker.io/armlimited/arm-mcp:2.4.0) |
| Transport (differs) | Not stated | stdio |
| Tools it declares (differs) | Not published | 7 |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 1 | Not a bundle |
| Licence (differs) | MIT | Apache-2.0 |
| Repository (differs) | github.com/lcapossio/hdldiagzero | github.com/arm/mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
hdldiagZero
Generate clean SVG block diagrams of HDL/RTL/SoC designs. Color-codes by clock domain, distinguishes AXI-MM/Lite/Stream, draws CDC blocks with split fill, omits clock/reset/JTAG/debug clutter, and validates output geometry.
Arm MCP Server
Official Arm MCP server for code migration, optimization, and Arm architecture guidance
How to run each
hdldiagZero As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install hdldiagzero@claude-communityArm MCP Server As a local MCP server: Docker image
claude mcp add --transport stdio arm-mcp -- docker run -i --rm run --rm -i -v "<YOUR_WORKSPACE_PATH>:/workspace" -v "<YOUR_SSH_PRIVATE_KEY_PATH>:/run/keys/ssh-key.pem:ro" -v "<YOUR_SSH_KNOWN_HOSTS_PATH>:/run/keys/known_hosts:ro" docker.io/armlimited/arm-mcp:2.4.0Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of hdldiagZero publish no list of tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: hdldiagZero · What it can do: Arm MCP Server · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.