foxglove

foxglove is a skill for Claude Code, Codex from robium-ai/robium. It costs 118 tokens per session (3,709 once invoked), scanned B, original, MIT.

A robotics visualization setup built around Foxglove, a desktop or browser tool for viewing robot data, and foxglove_bridge, which connects live ROS 2 systems to it. MCAP is a file format used to record and replay robot data.

In plain words
What is it for?
Use it to connect to live ROS 2 systems, arrange data views, record and replay MCAP files, and visualize remote robots through a desktop app or browser.
Why use it?
It helps developers inspect robots or simulations running remotely or without a local display, where RViz2 may not fit.

Skill for Claude CodeCodex

Part of the robium plugin — 72 skills, 1 agent, 6 hooks shipped together

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.

agentmods
npx agentmods add skills/robium-ai/robium/1.1.2
Any agent
npx skills add robium-ai/robium --skill 1.1.2
Clone the repo
git clone --depth 1 https://github.com/robium-ai/robium

Made for: Claude Code, Codex.

Or install robium, the plugin that ships this one along with the rest of its 72 skills, 1 agent, 6 hooks.

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 foxglove

README.md
[![agentmods](https://agentmods.dev/badge/skills/robium-ai/robium/1.1.2.svg)](https://agentmods.dev/skills/robium-ai/robium/1.1.2)
Your own site
<a href="https://agentmods.dev/skills/robium-ai/robium/1.1.2"><img src="https://agentmods.dev/badge/skills/robium-ai/robium/1.1.2.svg" alt="Measured on agentmods" height="20"></a>
Per session 118 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,709 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
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 $0.00118 $0.03709
Opus 5 $0.00059 $0.01854
Sonnet 5 $0.00024 $0.00742
Haiku 4.5 $0.00012 $0.00371

Measured 5d ago against content hash 792aa2310969, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade B, and why

foxglove scanned grade B 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 5d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo apt install ros-$ROS_DISTRO-foxglove-bridge
archive/foxglove/1.1.2/SKILL.md · 257 lines

How it starts

The opening of the file, as written. The whole thing — 257 lines — stays where its author put it; the contents beside it link to each section on GitHub.

foxglove

The remote/web visualization tool for robium: foxglove_bridge exposes a live ROS 2 graph over a WebSocket, and the Foxglove app (desktop or app.foxglove.dev in a browser) connects to it or opens a recorded MCAP file — the answer environments and gazebo route to whenever a robot or sim runs headless/remote and RViz2's local-display requirement doesn't fit. Two things changed over time and matter for how this skill is used: the bridge itself (foxglove_bridge, MIT-licensed, open source) moved its active development from foxglove/ros-foxglove-bridge (now ROS 1-only, maintenance mode) to the foxglove/foxglove-sdk monorepo, and the app that used to be free/open-source "Foxglove Studio" was discontinued in February 2024 (last open-source release v1.87.0, MPL-2.0) in favor of the current closed-source, commercial "Foxglove" 2.x app — which does still ship a free tier the product page states is "free forever" for local/live visualization, separate from its paid Data Platform/cloud features. The bridge migration was confirmed via direct fetch of the foxglove/ros-foxglove-bridge and foxglove/foxglove-sdk GitHub repos this session; the free-tier claim was confirmed via direct fetch of foxglove.dev's pricing page, while the Studio-to-2.x licensing history was reconstructed via search-synthesis after the source blog post 404'd on direct fetch (see References) — re-verify before repeating either claim, since licensing terms are exactly the kind of thing that drifts.

When to use this skill

  • Setting up foxglove_bridge on a robot or sim host, building a layout, recording or replaying an MCAP file, or viewing a robot's data from a machine that isn't the robot itself.
  • The trigger phrases in the description: 'foxglove', 'mcap', visualizing a robot running on a remote server, sharing visualization with others, recording sessions for later analysis.
  • Any time environments or gazebo has already concluded the target is headless/remote and the next question is "how do I actually see it" — this skill is that answer.
  • Cross-references — go to the sibling skill instead when the question is:
    • Whether headless/remote is the deployment target at all, GPU passthrough, or the general local-vs-remote strategy → environments (load first if not already decided; this skill assumes that decision is made and just delivers the viz half of it).
    • Local desktop ROS debugging with a display attached → rviz2.
    • ML/data-centric logging outside ROS message types (policy rollouts, LeRobot episodes) → rerun — though LeRobot dataset episodes can also be served straight to the Foxglove app via lerobot-dataset-viz --display-mode foxglove (invocation is the lerobot skill's territory; verified 2026-07-12, manip-trial).
    • Choosing which viz tool fits the situation at all → visualization (routes here once Foxglove is the right choice).

Read the full file on GitHub · 257 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. 5d ago First seen · 257 lines · 118 tokens per session scan B 792aa2310969

Subscribe to this mod's changes

foxglove is a skill published in the GitHub repository robium-ai/robium (9 stars, last pushed 7d ago), licensed MIT. It adds 118 tokens to every session and 3,709 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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