dev-electra-one

dev-electra-one is a skill for Claude Code from roomi-fields/electra-one-mcp. It costs 156 tokens per session (6,239 once invoked), scanned A, original, MIT.

A preparation guide for writing or changing Lua code and presets for the Electra One MK2 or Mini MIDI controller. It directs the agent to consult the project's local mirror of the official device documentation first.

In plain words
What is it for?
Working on Electra One widget Lua files, theme libraries, preset JSON, or preset uploads, with the relevant official documentation checked beforehand.
Why use it?
It helps avoid silent device-specific mistakes that can make widgets render incorrectly without an obvious error.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 server/win_bridge.py upload-preset \.

Part of the electra-one plugin — 1 skill shipped together

Good fit Working on Electra One widget Lua files, theme libraries, preset JSON, or preset uploads, with the relevant official documentation checked beforehand.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/roomi-fields/electra-one-mcp
agentmods
npx agentmods add skills/roomi-fields/electra-one-mcp/dev-electra-one

Made for: Claude Code.

Or install electra-one, the plugin that ships this one along with the rest of its 1 skill.

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 dev-electra-one

README.md
[![agentmods](https://agentmods.dev/badge/skills/roomi-fields/electra-one-mcp/dev-electra-one.svg)](https://agentmods.dev/skills/roomi-fields/electra-one-mcp/dev-electra-one)
Your own site
<a href="https://agentmods.dev/skills/roomi-fields/electra-one-mcp/dev-electra-one"><img src="https://agentmods.dev/badge/skills/roomi-fields/electra-one-mcp/dev-electra-one.svg" alt="Measured on agentmods" height="20"></a>
Per session 156 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,239 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00156 $0.06239
Opus 5 $0.00078 $0.03120
Sonnet 5 $0.00031 $0.01248
Haiku 4.5 $0.00016 $0.00624

Measured 7d ago against content hash 80b0afe87dcb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

dev-electra-one 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

FIREBASE_API_KEY=$(for js in $(curl -s https://app.electra.one/presets/ | grep -oE '/_nuxt/[a-z0-9]+\.js' | sort -u); do
skills/dev-electra-one/SKILL.md · 443 lines

How it starts

The opening of the file, as written. The whole thing — 443 lines — stays where its author put it; the contents beside it link to each section on GitHub.

dev-electra-one

You are about to work on the Electra One MK2 MIDI controller — a programmable device whose Lua API and firmware behave in several non-obvious ways. This skill exists because we have lost hours, multiple times, rediscovering things that are already documented in HOWTO.md or in this skill. Do not start typing Lua before you've read the relevant material.

Trust the documented quirks. Most of them are silent failures: the widget renders as a default blue fader fallback, with no error in the browser console because the logger is off by default. By the time you "see" the problem, your only feedback is a bug-report-shaped silence.

Always do this first

  1. Read the official doc via RTFM, not via WebFetch. The electraone-widgets project workspace has a local mirror of docs.electra.one at .electra-docs/md/ (79 pages, including the entire Lua crash course) indexed by RTFM. Use mcp__rtfm__rtfm_search "<query>" to find relevant sections, mcp__rtfm__rtfm_expand to read them. The official docs ARE the source of truth — most behaviours we previously thought were "undocumented gotchas" turn out to be explicitly described once you grep the right page.
  2. Open the project's HOWTO.md sections 1 and 2 for the workflow we use (custom-paint pattern, Firestore PATCH push).
  3. Check MEMORY.md entry project_e1_device_gotchas for any firmware-specific quirks learned that aren't in the docs.
  4. Only after doing the above, write code.

If a piece of behaviour isn't covered in those documents and you have to figure it out from scratch, add it back to HOWTO.md before considering the work done. Don't invent gotchas from intuition — grep the local doc mirror first.

The Lua API on device (firmware 4.1.4, verified 2026-05-25)

These are the things the official docs at docs.electra.one/developers/luaext.html either don't say or don't make obvious. Treat every one of these as a hard constraint, not a recommendation — most cause silent fallback to the default blue fader rendering.

Read the full file on GitHub · 443 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 · 443 lines · 156 tokens per session scan A 80b0afe87dcb

Subscribe to this mod's changes

dev-electra-one is a skill published in the GitHub repository roomi-fields/electra-one-mcp (5 stars, last pushed 2mo ago), licensed MIT. It adds 156 tokens to every session and 6,239 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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