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.
npx skills add antoinebou12/uml-mcp --skill symbolatorgit clone --depth 1 https://github.com/antoinebou12/uml-mcpWrote 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.
[](https://agentmods.dev/skills/antoinebou12/uml-mcp/symbolator)<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.
<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>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.
| Model | Per session | Once 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 |
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.
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
clkand active-low resetsrst_nso 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
themeparam.
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
- Set
diagram_typetosymbolatorexactly. - Call
validate_umlwhen the source is untrusted (preferstrict: truefor Mermaid sequence). - Call
generate_uml,generate_uml_image(chat PNG), orgenerate_uml_batch. - Pass
themewhen this skill's Themes section lists supported values. - Surface the returned
url/playground(see the workflow skill).
Confirm formats with uml://formats or list_diagram_types when unsure.
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.
- 14d ago First seen · 68 lines · 52 tokens per session scan A 291d29172249
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.
symbolator compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| symbolatorantoinebou12/uml-mcp | Skill | 109 | yesterday | MIT | A | 52 | Claude Code, Codex |
| gke-compute-classesgoogle/skills | Skill | 22k | yesterday | Apache-2.0 | A | 83 | Claude Code, Codex |
| jetson-diagnosticNVIDIA/skills | Skill | 3.9k | yesterday | Apache-2.0 | A | 30 | Claude Code, Codex |
| holoscan-install-wheelNVIDIA/skills | Skill | 3.9k | yesterday | Apache-2.0 | A | 34 | Claude Code, Codex |
| offensive-z-waveSnailSploit/Claude-Red | Skill | 10k | 25d ago | MIT | A | 113 | Claude Code, Codex |
| doca-socket-relayNVIDIA/skills | Skill | 3.9k | yesterday | Apache-2.0 | A | 236 | Claude Code, Codex |
| hsb-flashNVIDIA/skills | Skill | 3.9k | yesterday | Apache-2.0 | B | 94 | Claude Code |