A development guide for the Nodel platform itself, including its Java framework, Jython host, and web interface. Nodel is software for running connected components called nodes.

Use it to build the Gradle project, run a development host, and run Playwright integration and end-to-end tests.

It explains how to build and test the platform source code, reducing guesswork when changing Nodel itself.

nodel-dev — Skill for Claude Code and Codex by scroix/nodel-skills

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 scroix/nodel-skills --skill nodel-dev

Clone the repo

git clone --depth 1 https://github.com/scroix/nodel-skills

Made for: Claude Code, Codex.

Or install nodel, the plugin that ships this one along with the rest of its 4 skills.

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/scroix/nodel-skills/nodel-dev/github.svg)](https://agentmods.dev/skills/scroix/nodel-skills/nodel-dev)

Your own site

<a href="https://agentmods.dev/skills/scroix/nodel-skills/nodel-dev"><img src="https://agentmods.dev/badge/skills/scroix/nodel-skills/nodel-dev/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/scroix/nodel-skills/nodel-dev"><img src="https://agentmods.dev/badge/skills/scroix/nodel-skills/nodel-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,231 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	$0.00073	$0.01231
Opus 5.5	$0.00029	$0.00492
Sonnet 5.5	$0.00015	$0.00246
Haiku 4.5	$0.00007	$0.00123

Measured 2mo ago against content hash 7b44e70bd35f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nodel-dev 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 2mo 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.

skills/nodel-dev/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Nodel Platform Development

For working on the Nodel source tree (github.com/museumsvictoria/nodel). Three Gradle modules (settings.gradle):

Module	What it is
`nodel-framework`	Core Java library: nodel points, channels, discovery, REST/reflection, vendored NanoHTTPD
`nodel-jyhost`	The host process: embeds Jython 2.5.4-rc1, runs nodes, serves the web UI and REST API
`nodel-webui-js`	The web UI: Grunt-built JS/LESS, packaged as a Java resource JAR

Other top-level directories (nodel-framework-dotnet, nodel-windows, etc.) are not part of the Gradle build.

Building

Requires JDK 11+ on PATH; always build through the wrapper (./gradlew — currently Gradle 8.14.5, pinned in gradle/wrapper/gradle-wrapper.properties).

./gradlew build          # full build INCLUDING the whole test suite
./gradlew build -x test  # build only

The runnable fat JAR lands in nodel-jyhost/build/distributions/standalone/ as nodelhost-<branch>-<version>-rev<N>.jar. The first build downloads Node.js and npm packages for the web UI.

The web UI is Grunt-built and ships inside the JAR as classpath resource org/nodel/host/content.zip — so a UI change means rebuilding nodel-webui-js, not just nodel-jyhost. Pipeline details: references/architecture.md.

Running a dev host

mkdir -p ~/nodel-dev && cd ~/nodel-dev   # host creates dirs in its cwd
java -jar <repo>/nodel-jyhost/build/distributions/standalone/nodelhost-*-rev*.jar

Web interface on port 8085; override with -p <port>.
Nodes live in ./nodes (-r/--nodelRoot); recipes in ./recipes (--recipes).
Press Enter in the console to shut down cleanly.
./gradlew :nodel-jyhost:run also works, but litters nodel-jyhost/ with runtime dirs since the module dir is its cwd.

Testing

JUnit 5 + Playwright tests in nodel-jyhost/src/test/java/org/nodel/. Gradle starts a real nodelhost on port 18085 in nodel-jyhost/nodelhost-temp/; on failure, read output.log and error.log there first.

Read the full file on GitHub · 106 lines

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 106 lines · 73 tokens per session scan A 7b44e70bd35f

Subscribe to this mod's changes

nodel-dev is a skill published in the GitHub repository scroix/nodel-skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 73 tokens to every session and 1,231 once invoked, about $0.0003 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 2026-08-31.

nodel-dev next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
nodel-devscroix/nodel-skills	Skill	2	3mo ago	MIT	A	73	Claude Code, Codex
imagegenopenai/codex	Skill	135k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	100k	today	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	316k	7d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code