devtools-marketplace

A guide for publishing a developer-tools plugin to npm and submitting it to the TanStack Devtools Marketplace. The marketplace is a registry where users can browse and install compatible plugins.

In plain words
What is it for?
It helps define plugin names, descriptions, logos, required package versions, framework tags, imports, and submissions to TanStack Devtools' plugin registry.
Why use it?
It explains the required registry entry and package metadata, reducing mistakes when preparing a plugin for marketplace review and installation.

Skill for Claude CodeCodex

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/tanstack/devtools/devtools-marketplace
Any agent
npx skills add TanStack/devtools --skill devtools-marketplace
Clone the repo
git clone --depth 1 https://github.com/TanStack/devtools

Made for: Claude Code, Codex.

Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,513 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00054 $0.03513
Opus 5 $0.00027 $0.01757
Sonnet 5 $0.00011 $0.00703
Haiku 4.5 $0.00005 $0.00351

Measured 2d ago against content hash 8a8b5f1d4e26, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

devtools-marketplace 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 2d 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.

packages/devtools/skills/devtools-marketplace/SKILL.md · 391 lines

How it starts

The opening of the file, as written. The whole thing — 391 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TanStack Devtools Marketplace

Prerequisite: Build a working plugin first using the devtools-plugin-panel skill. The marketplace submission assumes you already have a published npm package that exports either a JSX panel component or a function-based plugin.

Overview

The TanStack Devtools Marketplace is a built-in registry inside the devtools shell. Users browse it from the Marketplace tab, and can install plugins with a single click. Submission is a PR to the packages/devtools/src/tabs/plugin-registry.ts file in the TanStack/devtools repository.

PluginMetadata Interface

Every marketplace entry conforms to the PluginMetadata interface exported from packages/devtools/src/tabs/plugin-registry.ts:

export interface PluginMetadata {
  /** Package name on npm (e.g., '@acme/react-analytics-devtools') */
  packageName: string

  /** Display title shown on the marketplace card */
  title: string

  /** Short description of what the plugin does */
  description?: string

  /** URL to a logo image (SVG, PNG, etc.) */
  logoUrl?: string

  /** Required base package dependency */
  requires?: {
    /** Required package name (e.g., '@tanstack/react-query') */
    packageName: string
    /** Minimum required version (semver) */
    minVersion: string
    /** Maximum version (if there's a known breaking change) */
    maxVersion?: string
  }

  /** Plugin import configuration -- enables one-click auto-install */
  pluginImport?: {
    /** The exact export name to import from the package
     *  (e.g., 'FormDevtoolsPlugin' or 'ReactQueryDevtoolsPanel') */
    importName: string
    /** 'jsx' = component rendered via { name, render: <Component /> }
     *  'function' = called directly as FnName() in the plugins array */
    type: 'jsx' | 'function'
  }

  /** Custom plugin ID for matching against registered plugins.
   *  The default behavior lowercases the package name and replaces
   *  non-alphanumeric characters with '-'.
   *  Example: pluginId: 'tanstack-form' matches 'tanstack-form-4'. */
  pluginId?: string

  /** URL to the plugin's documentation */
  docsUrl?: string

  /** Plugin author/maintainer */
  author?: string

  /** Repository URL */
  repoUrl?: string

  /** Framework this plugin supports */
  framework: 'react' | 'solid' | 'vue' | 'svelte' | 'angular' | 'other'

  /** Mark as featured -- appears in the Featured section with animated border.
   *  Reserved for official TanStack partners. */
  featured?: boolean

  /** Mark as new -- shows a "New" banner on the card */
  isNew?: boolean

  /** Tags for filtering and categorization */
  tags?: Array<string>
}

Read the full file on GitHub · 391 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. 2d ago First seen · 391 lines · 54 tokens per session scan A 8a8b5f1d4e26

Subscribe to this mod's changes

devtools-marketplace is a skill published in the GitHub repository TanStack/devtools (493 stars, last pushed 2d ago), licensed MIT. It adds 54 tokens to every session and 3,513 once invoked, about $0.0003 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 2026-08-30.

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