# why-did-you-render-mcp

> Use this tool when you need to identify and diagnose unnecessary React re-renders, as it bridges browser data to coding agents, enabling performance optimization through MCP tools, and accepts render event data as input to output actionable insights for improvement. It solves problems related to performance bottlenecks and slow rendering times in React applications. Ideal for use during application debugging and optimization phases.

Canonical page: https://skillsregistry.net/skills/0x1f320-why-did-you-render-mcp  
JSON: https://api.skillsregistry.net/v1/skills/0x1f320-why-did-you-render-mcp

## Description

Bridges unnecessary React re-render data from the browser to coding agents, enabling performance diagnosis and optimization through MCP tools.

## Trust

- **Trust score (0–1):** 0.70
- **Verification tier:** verified
- **Last scanned:** 2026-09-01

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** browser-automation
- **Updated:** 2026-09-01

## Source

- **Source listing:** [Glama](https://glama.ai/mcp/servers/zzzfbp4puy)
- **Repository:** <https://github.com/0x1f320/why-did-you-render-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "0x1f320-why-did-you-render-mcp"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/0x1f320-why-did-you-render-mcp` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/0x1f320-why-did-you-render-mcp/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt