bpmn-generator: Instructions file for Claude Code

CLAUDE.md

bpmn-generator CLAUDE.md is an instructions file for Claude Code from Stieges/bpmn-generator. It costs 13,264 tokens per session, scanned A, original, MIT.

Project instructions for generating BPMN 2.0 process diagrams from structured JSON. BPMN is a standard notation for describing business processes, and the output can be opened by tools such as Camunda Modeler.

In plain words
What is it for?
It guides conversion from natural-language process descriptions to validated JSON, automatic layout, and BPMN XML and SVG output.
Why use it?
It separates process meaning from diagram layout, reducing the risk that generated coordinates or XML break the diagram.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is Stieges/bpmn-generator's own configuration. It tells Claude Code how to work on bpmn-generator itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything bpmn-generator configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is ├── layout.js ← types.js, ../shared/utils.js, constants.js, topology.js, elkjs.

Reuse

Borrowing it

Nothing to install: this file belongs to Stieges/bpmn-generator. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Stieges/bpmn-generator/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Stieges/bpmn-generator

Made for: Claude Code.

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README.md
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Per session 13,264 This file is loaded in full into every session.
When invoked 13,264 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.13264 $0.13264
Opus 5 $0.06632 $0.06632
Sonnet 5 $0.02653 $0.02653
Haiku 4.5 $0.01326 $0.01326

Measured yesterday against content hash 744521de3b7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

bpmn-generator CLAUDE.md scanned grade A with 1 finding 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 yesterday.

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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- Subprocess (expanded) → `tests/fixtures/expanded-subprocess.json`
CLAUDE.md · 577 lines

How it starts

The opening of the file, as written. The whole thing — 577 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — BPMN Generator

Project Context

Enterprise BPMN 2.0 Generator: JSON Logic-Core → Validation → ElkJS Layout → BPMN 2.0 XML + SVG. OMG BPMN 2.0.2 compliant (ISO/IEC 19510:2013). Compatible with bpmn.io / Camunda Modeler.

Used as a Claude Code Skill (SKILL.md) — the LLM extracts Logic-Core JSON from natural language, the pipeline handles layout and serialization. The LLM NEVER touches coordinates.

Glossary

  • Logic-Core: the JSON intermediate format between LLM and pipeline. Schema in references/input-schema.json, prose in references/logic-core-schema.md. Example: tests/fixtures/simple-approval.json.
  • BPMN 2.0.2: OMG standard (ISO/IEC 19510:2013) for business process notation. We emit XML compatible with bpmn.io and Camunda Modeler.
  • BPMNDI: BPMN Diagram Interchange — the <bpmndi:*> namespace that carries graphical layout (coordinates, waypoints) alongside the semantic XML.
  • Pool / Lane: a Pool is a participant in a collaboration (its own process boundary); Lanes partition a Pool into roles/actors. Pools communicate via Message Flows.
  • WF-Net: Workflow-Net — a restricted Petri-Net with one source and one sink. Used for soundness analysis (WF01–WF03 rules).
  • Soundness: a process is sound if every case can reach the end state, no dead activities, no proper deadlocks. Petri-Net property.
  • Sugiyama: layered graph drawing algorithm (Sugiyama et al., 1981). ElkJS implements a variant; we use it via the org.eclipse.elk.layered algorithm.
  • ElkJS Layered: JavaScript port of the Eclipse Layout Kernel's layered algorithm. Our auto-layout engine — see scripts/bpmn/layout.js.
  • Bruce Silver Method & Style: industry-recognized style conventions for BPMN diagrams. Most M-layer rules derive from this work — M11 is our own (the decisionRef bridge), not Silver.
  • MCP: Model Context Protocol — the protocol Claude Code uses to talk to external tools. We expose the generator via scripts/mcp-bpmn-server.js.
  • MaD: Model-and-Data sanity check used by the robustness subsystem to validate synthetic fixtures.
  • Golden file: an .expected.bpmn (or .expected.svg) committed alongside a fixture; tests fail if output diverges.

Read the full file on GitHub · 577 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. yesterday First seen · 577 lines · 13,264 tokens per session scan A 744521de3b7f

Subscribe to this mod's changes

bpmn-generator CLAUDE.md is an instructions file published in the GitHub repository Stieges/bpmn-generator (37 stars, last pushed 3d ago), licensed MIT. It adds 13,264 tokens to every session, about $0.0663 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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