plantuml-rendering-skill: Instructions file for Codex

AGENTS.md

plantuml-rendering-skill AGENTS.md is an instructions file for Codex, OpenCode from asolfre/plantuml-rendering-skill. It costs 1,019 tokens per session, scanned A, original, MIT.

Repository instructions for a coding-agent skill that renders PlantUML diagrams as image files. PlantUML is a text format for describing diagrams such as system designs and sequences.

In plain words
What is it for?
Use them when working on the PlantUML rendering skill, its shell scripts, bundled Java renderer, sample diagrams, installer, or tests.
Why use it?
They explain how the repository is organized, how diagrams are rendered, and what is needed to run or test it.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Claude Code; mentions AGENTS.md; mentions OpenCode.

This is asolfre/plantuml-rendering-skill's own configuration. It tells Codex and OpenCode how to work on plantuml-rendering-skill 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 plantuml-rendering-skill configures →

Reuse

Borrowing it

Nothing to install: this file belongs to asolfre/plantuml-rendering-skill. 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/asolfre/plantuml-rendering-skill/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/asolfre/plantuml-rendering-skill

Made for: Codex, OpenCode.

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 plantuml-rendering-skill AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/asolfre/plantuml-rendering-skill/agents-md.svg)](https://agentmods.dev/instructions/asolfre/plantuml-rendering-skill/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/asolfre/plantuml-rendering-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/asolfre/plantuml-rendering-skill/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,019 This file is loaded in full into every session.
When invoked 1,019 The same file — it is already loaded in full.
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 $0.01019 $0.01019
Opus 5 $0.00509 $0.00509
Sonnet 5 $0.00204 $0.00204
Haiku 4.5 $0.00102 $0.00102

Measured 7d ago against content hash d5f030120074, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

plantuml-rendering-skill AGENTS.md 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 7d 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.

AGENTS.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project Overview

This repository is an AI agent skill/plugin for rendering PlantUML diagrams as images. It is not a typical application service: no Node, Python, or compiled code build pipeline. Runtime behavior is implemented with shell scripts and a bundled PlantUML Java JAR.

Repository Structure

SKILL.md                                # Skill manifest + agent instructions
scripts/
  render_diagram.sh                     # Main renderer script
  lib/plantuml-mit-1.2026.1.jar         # Bundled PlantUML JAR (MIT variant)
tests/
  diagram.puml                          # Sample Azure architecture diagram
  system-design.puml                    # Sample class diagram
  broken-sequence.puml                  # Intentionally broken input for testing
evals/
  evals.json                            # Eval test case definitions
install.sh                              # Interactive installer (Claude Code / OpenCode / Copilot)

Rules Files (Cursor/Copilot)

  • .cursor/rules/: not present
  • .cursorrules: not present
  • .github/copilot-instructions.md: not present

No external editor-specific rule files are currently enforced in this repo.

Prerequisites

  • Java (JRE or JDK) installed and available on PATH
  • Bash available for script execution

Build / Lint / Test Commands

There is no build system and no automated test suite configured.

Build

  • No compile/build step exists.
  • Functional verification is done by rendering a .puml diagram.

Test (full)

Manual smoke test:

./scripts/render_diagram.sh tests/diagram.puml

Expected result: PNG output generated next to the source .puml file.

Test (single test)

There is no test framework, so a "single test" means rendering one specific input file:

./scripts/render_diagram.sh path/to/your/diagram.puml

Lint

No linting is configured, but shellcheck is recommended for shell scripts:

shellcheck install.sh scripts/render_diagram.sh

Read the full file on GitHub · 159 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. 7d ago First seen · 159 lines · 1,019 tokens per session scan A d5f030120074

Subscribe to this mod's changes

plantuml-rendering-skill AGENTS.md is an instructions file published in the GitHub repository asolfre/plantuml-rendering-skill (2 stars, last pushed 5mo ago), licensed MIT. It adds 1,019 tokens to every session, about $0.0051 per session on Opus 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 2026-08-31.

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