symbolator

symbolator is a skill for Claude Code, Codex from antoinebou12/uml-mcp. It costs 52 tokens per session (557 once invoked), scanned A, original, MIT.

A Symbolator diagram-writing guide for digital logic symbols. It takes a Verilog or SystemVerilog module, languages used to describe electronic circuits, and draws its input and output pins.

In plain words
What is it for?
Use it to create SVG symbols for hardware modules such as counters or transmitters. It supports grouped ports, buses, clock inputs, and active-low reset naming.
Why use it?
It helps turn a circuit module's ports into a readable schematic symbol without manually drawing each pin. Port names and groups can also communicate clocks, resets, controls, and data.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create SVG symbols for hardware modules such as counters or transmitters. It supports grouped ports, buses, clock inputs, and active-low reset naming.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/antoinebou12/uml-mcp/symbolator
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 antoinebou12/uml-mcp --skill symbolator
Clone the repo
git clone --depth 1 https://github.com/antoinebou12/uml-mcp

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 symbolator

README.md
[![agentmods](https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/symbolator/github.svg)](https://agentmods.dev/skills/antoinebou12/uml-mcp/symbolator)
Your own site
<a href="https://agentmods.dev/skills/antoinebou12/uml-mcp/symbolator"><img src="https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/symbolator/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 symbolator

Your own site · 80×15
<a href="https://agentmods.dev/skills/antoinebou12/uml-mcp/symbolator"><img src="https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/symbolator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 557 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 $0.00052 $0.00557
Opus 5.5 $0.00021 $0.00223
Sonnet 5.5 $0.00010 $0.00111
Haiku 4.5 $0.00005 $0.00056

Measured 14d ago against content hash 291d29172249, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

symbolator 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 14d 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.

.skill/skills/symbolator/SKILL.md · 68 lines

What it actually says

symbolator diagram (uml-mcp)

diagram_type: symbolator
Backend: symbolator
Output formats: svg

Digital logic and schematic symbols

Load the workflow skill uml-mcp-diagrams for URL-first replies, progressive discovery, and which MCP tool to call. This file is notation only; it does not add an MCP tool.

Notation tips

  • Input is a Verilog/SystemVerilog module; Symbolator draws the pin symbol.
  • Group ports with //# {{group|Title}} before related ports (e.g. clocks, ctrl, data).
  • Name clocks clk and active-low resets rst_n so wedges render; buses as [7:0].
  • Put inputs on the left groups and outputs on the right of the last group for a readable IC-style symbol.

Styling

  • Port groups color the symbol bands; naming drives clock/reset glyphs.
  • No MCP theme param.

Starter template

module counter (
  //# {{clocks|Clocking}}
  input  wire       clk,
  input  wire       rst_n,
  //# {{data|Data}}
  output reg  [7:0] count
);
endmodule

Example

module uart_tx (
  //# {{clocks|Clocking}}
  input  wire       clk,
  input  wire       rst_n,
  //# {{ctrl|Control}}
  input  wire       valid,
  output wire       ready,
  //# {{data|Payload}}
  input  wire [7:0] data,
  output wire       tx
);
endmodule

Render with uml-mcp

  1. Set diagram_type to symbolator exactly.
  2. Call validate_uml when the source is untrusted (prefer strict: true for Mermaid sequence).
  3. Call generate_uml, generate_uml_image (chat PNG), or generate_uml_batch.
  4. Pass theme when this skill's Themes section lists supported values.
  5. Surface the returned url / playground (see the workflow skill).

Confirm formats with uml://formats or list_diagram_types when unsure.

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. 14d ago First seen · 68 lines · 52 tokens per session scan A 291d29172249

Subscribe to this mod's changes

symbolator is a skill published in the GitHub repository antoinebou12/uml-mcp (109 stars, last pushed yesterday), licensed MIT. It adds 52 tokens to every session and 557 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 2026-10-24.

Related

symbolator compared with skills from other repositories

symbolator next to 6 skills from other repositories
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symbolatorantoinebou12/uml-mcpSkill109yesterdayMITA52Claude Code, Codex
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holoscan-install-wheelNVIDIA/skillsSkill3.9kyesterdayApache-2.0A34Claude Code, Codex
offensive-z-waveSnailSploit/Claude-RedSkill10k25d agoMITA113Claude Code, Codex
doca-socket-relayNVIDIA/skillsSkill3.9kyesterdayApache-2.0A236Claude Code, Codex
hsb-flashNVIDIA/skillsSkill3.9kyesterdayApache-2.0B94Claude Code