A writing guide for BPMN diagrams, a standard way to describe business processes with events, tasks, decisions, and paths between them. It can produce BPMN 2.0 XML or rendered SVG diagrams.

It is for documenting or modelling executable and non-executable business workflows.

It helps the agent represent process logic in a format that business-process tools can understand. It also encourages complete flows with clear starts, tasks, gateways, and endings.

bpmn — Skill for Claude Code and Codex by antoinebou12/uml-mcp

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 bpmn

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/bpmn/github.svg)](https://agentmods.dev/skills/antoinebou12/uml-mcp/bpmn)

Your own site

<a href="https://agentmods.dev/skills/antoinebou12/uml-mcp/bpmn"><img src="https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/bpmn/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/antoinebou12/uml-mcp/bpmn"><img src="https://agentmods.dev/badge/skills/antoinebou12/uml-mcp/bpmn.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 1,355 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.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.01355
Opus 5.5	$0.00021	$0.00542
Sonnet 5.5	$0.00010	$0.00271
Haiku 4.5	$0.00005	$0.00136

Measured 14d ago against content hash 661938bf6c36, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bpmn 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/bpmn/SKILL.md · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

bpmn diagram (uml-mcp)

diagram_type: bpmn
Backend: bpmn
Output formats: svg

Business Process Model and Notation

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

Prefer executable BPMN 2.0 XML with start, tasks, gateways, end, and sequenceFlow (see tutorials/bpmn.md).
Use uml://templates / uml://examples key bpmn as a starter.

Styling

BPMN XML has no Kroki theme switch; use clear task names and gateway labels.
Prefer executable BPMN 2.0 with sequenceFlow.

Starter template

<?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL"
                  xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
                  xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
                  xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
                  id="Definitions_1"
                  targetNamespace="http://bpmn.io/schema/bpmn">
  <bpmn:process id="Process_1" isExecutable="false">
    <bpmn:startEvent id="StartEvent_1"/>
    <bpmn:task id="Task_1" name="Process"/>
    <bpmn:endEvent id="EndEvent_1"/>
    <bpmn:sequenceFlow sourceRef="StartEvent_1" targetRef="Task_1"/>
    <bpmn:sequenceFlow sourceRef="Task_1" targetRef="EndEvent_1"/>
  </bpmn:process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1">
      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
        <dc:Bounds x="173" y="102" width="36" height="36"/>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="_BPMNShape_Task_1" bpmnElement="Task_1">
        <dc:Bounds x="260" y="80" width="100" height="80"/>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="_BPMNShape_EndEvent_2" bpmnElement="EndEvent_1">
        <dc:Bounds x="417" y="102" width="36" height="36"/>
      </bpmndi:BPMNShape>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</bpmn:definitions>

Read the full file on GitHub · 102 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.

14d ago First seen · 102 lines · 52 tokens per session scan A 661938bf6c36

Subscribe to this mod's changes

bpmn 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 1,355 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.

Planning mcp uml

bpmn next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
bpmnantoinebou12/uml-mcp	Skill	109	yesterday	MIT	A	52	Claude Code, Codex
detailed-designpan94u/forge	Skill	40	5d ago	none	A	27	Claude Code
writing-skillstakaakit/superpowers-uml	Skill	12	1mo ago	none	A	20	Claude Code
brainstormingtakaakit/superpowers-uml	Skill	12	1mo ago	none	A	37	Claude Code
finishing-a-development-branchtakaakit/superpowers-uml	Skill	12	1mo ago	none	A	27	Claude Code
systematic-debuggingtakaakit/superpowers-uml	Skill	12	1mo ago	none	A	21	Claude Code
test-driven-developmenttakaakit/superpowers-uml	Skill	12	1mo ago	none	A	17	Claude Code