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Agent skill

Led Control

by autonomous-ai in autonomous-ai/Physical-AI-Operating-System

Control the device's RGB light when the user asks for a SPECIFIC color (e.g.

Apache-2.0Auto-check passed

Install Led Control

skills CLI
$ npx skills add autonomous-ai/Physical-AI-Operating-System --skill led-control -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install autonomous-ai/Physical-AI-Operating-System led-control --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/autonomous-ai/Physical-AI-Operating-System.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/led-control .claude/skills/led-control && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
led-control
GitHub stars
381
Token cost
~1.7k tokens
SKILL.md length
800 words
Files
2
Skills in repo
28
Repo updated
First seen
Licence
Apache-2.0

At a glance

Control the device's RGB light when the user asks for a SPECIFIC color (e.g.

  • Works in 3 steps: Determine the user's intent → Place markers at start of reply — the… → Confirm the action to the user
  • Asks for a SPECIFIC color (e.g
  • SKILL.md covers Quick Start, Workflow, Examples and How to Control LEDs, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Led Control is an agent skill from autonomous-ai/Physical-AI-Operating-System. Control the device's RGB light when the user asks for a SPECIFIC color (e.g. "yellow", "red", "yellow", "red", "turn on color X", "enable X light"), an LED effect, or turning LEDs off. Do NOT use for ambiance/activity lighting (use Scene) or emotion expression (use Emotion).

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill.json`).

The repository describes itself as: The open-source operating system for physical AI. The licence is Apache-2.0.

When your agent uses it

  • Asks for a SPECIFIC color (e.g
  • Ambiance/activity lighting (use Scene)
  • Emotion expression (use Emotion)

Example prompts

  • “s RGB light when the user asks for a SPECIFIC color (e.g.”
  • “yellow”
  • “turn on color X”
  • “/led-control”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Determine the user's intent
  2. Place markers at start of reply — the device fires them in order before TTS
  3. Confirm the action to the user

What it can do on your machine

Read from SKILL.md and the folder at commit f1b9ebe. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Led Control loads about 1.7k tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 800 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~72
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from autonomous-ai/Physical-AI-Operating-System at commit f1b9ebe, republished under its Apache-2.0 licence (© autonomous-ai). 800 words, ~1,730 tokens.

Download SKILL.mdSave it as .claude/skills/led-control/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
led-control
description
Control the device's RGB light when the user asks for a SPECIFIC color (e.g. "yellow", "red", "yellow", "red", "turn on color X", "enable X light"), an LED effect, or turning LEDs off. Do NOT use for ambiance/activity lighting (use Scene) or emotion expression (use Emotion).

LED Control

Quick Start

Control the device's RGB light directly. Use this skill only when the user requests a specific color, effect, or to turn LEDs off.

Workflow

  1. Determine the user's intent:
    • Specific color -> [HW:/led/solid:{"color":[R,G,B]}]
    • Two or more colors / mix / gradient -> [HW:/led/paint:{"colors":[[R,G,B],[R,G,B]],"gradient":true}]
    • Effect -> [HW:/led/effect:{"effect":"name","color":[R,G,B],"speed":1.0}]
    • Turn off -> [HW:/led/off:{}]
  2. Place markers at start of reply — the device fires them in order before TTS
  3. Confirm the action to the user

Examples

Input: "Make it purple" / "turn on purple" Output: [HW:/led/solid:{"color":[100,50,200]}] I've set the LEDs to purple.

Input: "Turn on yellow light" / "set yellow" / "switch to yellow" / "yellow light" Output: [HW:/led/solid:{"color":[255,220,0]}] Yellow light on!

Input: "Turn on red light" / "set red" / "switch to red" / "red light" Output: [HW:/led/solid:{"color":[255,0,0]}] Red light on!

Input: "Turn on white light" / "set white" / "white light" Output: [HW:/led/solid:{"color":[255,255,255]}] White light on!

Input: "Change to cyan purple" / "mix blue and pink" / "gradient from red to orange" Output: [HW:/led/paint:{"colors":[[0,200,200],[150,0,255]],"gradient":true}] Cyan-to-purple gradient on!

Input: "Do a breathing light with warm color" Output: [HW:/led/effect:{"effect":"breathing","color":[255,180,100],"speed":0.5}] Breathing effect started with a warm glow.

Input: "Rainbow mode!" Output: [HW:/led/effect:{"effect":"rainbow","speed":1.0}] Rainbow effect is running!

Input: "Turn off the lights" Output: [HW:/led/off:{}] LEDs are off.

Input: "I want to relax" / "reading mode" / "goodnight" Output: Do NOT use this skill. Use Scene skill instead.

Input: Conversational reply needing emotion Output: Do NOT use this skill. Use Emotion skill instead.

How to Control LEDs

No exec/curl needed. Use inline markers at start of reply — the device fires them in order:

Solid color (automatically stops the current effect)
[HW:/led/solid:{"color":[255,220,0]}] Yellow light on!

Color is an RGB array [R, G, B].

Multi-color / gradient (automatically stops the current effect)
[HW:/led/paint:{"colors":[[0,200,200],[150,0,255]],"gradient":true}] Cyan-to-purple gradient!
  • colors: list of RGB gradient stops (2+ colors), blended smoothly across the whole strip
  • gradient: true is REQUIRED — without it the colors paint only the first N pixels and the rest of the strip keeps its old color
  • Works with 3+ stops too: {"colors":[[255,0,0],[255,220,0],[0,200,80]],"gradient":true} = red -> yellow -> green
Effect
[HW:/led/effect:{"effect":"breathing","color":[255,180,100],"speed":0.5}] Breathing warm glow.
  • effect (required): effect name from table below
  • color (optional): RGB array
  • speed (optional): 0.1 (slow) to 5.0 (fast), default 1.0
  • duration_ms (optional): auto-stop after N ms
Turn off / stop effect
[HW:/led/off:{}] LEDs off.
[HW:/led/effect/stop:{}]
Available effects
EffectDescriptionBest for
breathingSlow fade in/out with given colorRelaxation, idle ambient, meditation
candleWarm flickering like a real candleCozy evening, romantic mood
rainbowHue cycle across all pixelsFun, party, showing off
notification_flash3 quick flashes then auto-stopsAlerts, timer done, reminders
pulseRadial brightness wave from centerAttention, heartbeat, alive feeling
Color suggestions
Color nameColor (RGB)
White[255, 255, 255]
Yellow[255, 220, 0]
Warm white[255, 180, 100]
Orange[255, 100, 0]
Red[255, 0, 0]
Green[0, 200, 80]
Blue[0, 150, 255]
Purple[100, 50, 200]
Pink[255, 80, 150]

Error Handling

  • If the API returns an error or is unreachable, inform the user: "I couldn't control the LEDs right now. The hardware service may be unavailable."
  • If the user requests an unknown effect name, pick the closest match from the available effects table or tell the user which effects are available.
Show full SKILL.md (305 more words)Show less

Rules

  • ALWAYS include the JSON body, even for no-argument commands. Every marker is [HW:/path:{...}] — for commands that take no arguments the body is the empty object {}. Emit [HW:/led/off:{}] and [HW:/led/effect/stop:{}], NEVER the bodyless [HW:/led/off] or [HW:/led/effect/stop]. A marker without :{...} is malformed and the device silently drops it — the light will NOT turn off.
  • The marker is NOT a markdown link. Never wrap it as [some text](HW:/led/off:{}) — emit the plain marker [HW:/led/off:{}] followed by your sentence as normal text.
  • "Turn on color X" / "set light X" / "change color X" = THIS skill. Any request naming a color (yellow, red, green, purple, white, orange, pink…) routes here — NOT to Emotion or Scene. Emotion yellow/happy is for YOUR feelings, not user's lighting request.
  • NEVER use /led-color or /led/color for setting color — these endpoints do NOT exist. Always use [HW:/led/solid:{"color":[R,G,B]}].
  • Two or more colors at once = /led/paint with "gradient":true. /led/solid takes exactly ONE color — never try to express "cyan purple" as a single blended RGB; paint a gradient instead.
  • Solid and paint stop effects automatically. Their HAL endpoints stop the running effect before updating the strip; do not add a separate stop marker. Keep /led/effect/stop for an explicit stop-only request.
  • Solid colors = full brightness. For dim/ambient lighting, use the Scene skill instead.
  • Effects run until stopped (unless duration_ms is set). Starting a new effect auto-stops the previous one.
  • /led/off also stops any running effect.
  • For "make it cozy" or "candle light" -> use candle effect, NOT a static orange color.
  • For "breathing" or "pulsing" requests -> use the matching effect.
  • Combine effects with low speed (0.3-0.5) for calm moods, high speed (2.0-3.0) for energy.
  • Do NOT use for activity/ambiance lighting (sleeping, relaxing, reading, focus, movie) -> use Scene skill.
  • Do NOT use for expressing emotion -> use Emotion skill.

Output Template

[HW:/led/solid:{"color":[100,50,200]}] Purple light on.

Examples:

  • [HW:/led/solid:{"color":[100,50,200]}] Purple light on.
  • [HW:/led/effect:{"effect":"breathing","color":[255,180,100],"speed":0.5}] Warm breathing light on.
  • [HW:/led/off:{}] Lights off.

© autonomous-ai, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in skills/led-control of autonomous-ai/Physical-AI-Operating-System.

  • SKILL.md
  • skill.json

Open the folder on GitHubat commit f1b9ebe

Compare with similar skills

Led Control next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Led Control compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Led Control this skillautonomous-ai/Physical-AI-Operating-System381—~1.7kAutomated safety check: PassApache-2.0
Run Devicelab With Ledflutter/flutter179k—~786Automated safety check: PassBSD-3-Clause
Video Template Frame Light Leak Cinemanexu-io/open-design100k—~329Automated safety check: PassApache-2.0
Seedance LightingEmily2040/seedance-2.07.5k1 repos~1.1kAutomated safety check: PassMIT
Frame Light Leak Cinemanexu-io/open-design100k—~768Automated safety check: PassApache-2.0
LightFullive-AI/Anima1k—~240Automated safety check: PassApache-2.0

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Questions about Led Control

What does Led Control do?

Control the device's RGB light when the user asks for a SPECIFIC color (e.g. Led Control is an agent skill from autonomous-ai/Physical-AI-Operating-System.g.

When should I use Led Control?

Led Control fits situations like: asks for a SPECIFIC color (e.g; ambiance/activity lighting (use Scene); emotion expression (use Emotion).

How do I install Led Control in Claude Code?

Run `npx skills add autonomous-ai/Physical-AI-Operating-System --skill led-control -a claude-code`. Or copy the skill folder (skills/led-control in autonomous-ai/Physical-AI-Operating-System) into .claude/skills/led-control in your project. Claude Code loads it when a task matches its description.

How do I install Led Control in Codex?

Run `npx skills add autonomous-ai/Physical-AI-Operating-System --skill led-control -a codex`. Or copy the skill folder (skills/led-control in autonomous-ai/Physical-AI-Operating-System) into .agents/skills/led-control in your project. Codex loads it when a task matches its description.

Can I use Led Control in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add autonomous-ai/Physical-AI-Operating-System --skill led-control -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/led-control, .gemini/skills/led-control, .github/skills/led-control and .opencode/skills/led-control in your project.

What does Led Control need to run?

SKILL.md names no scripts, command-line tools or credentials: Led Control is instructions for the agent only.

Does Led Control access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Led Control safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Led Control use?

Led Control is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Led Control use?

About 1.7k tokens (SKILL.md is roughly 6.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Led Control?

Skills that share tags, products or a category with Led Control: Run Devicelab With Led (flutter/flutter, 179k stars), Video Template Frame Light Leak Cinema (nexu-io/open-design, 100k stars), Seedance Lighting (Emily2040/seedance-2.0, 7.5k stars) and Frame Light Leak Cinema (nexu-io/open-design, 100k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Led Control?

autonomous-ai (a GitHub organization) maintains it in autonomous-ai/Physical-AI-Operating-System, which has 381 GitHub stars. The repository holds 28 skills in this directory. The repository was last updated on October 8, 2026.

Source: autonomous-ai/Physical-AI-Operating-System on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.