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Agent skill

Streaming HTML

by thedaviddias in thedaviddias/Front-End-Checklist

A skill your agent uses when reviewing server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until…

MITAuto-check passedBackend & APIs

Install Streaming HTML

skills CLI
$ npx skills add thedaviddias/Front-End-Checklist --skill streaming-html -a claude-code

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

GitHub CLI
$ gh skill install thedaviddias/Front-End-Checklist streaming-html --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/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/streaming-html .claude/skills/streaming-html && 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
streaming-html
GitHub stars
74k
Token cost
~553 tokens
SKILL.md length
244 words
Files
2 (incl. references)
Skills in repo
390
Repo updated
First seen
Licence
MIT

At a glance

A skill your agent uses when reviewing server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until…

  • Reviewing server-side rendering setup
  • SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Next.js App Router pages

What it does

Streaming HTML is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until completion.

Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).

It sits in Backend & APIs, covering Backend development. It works with Next.js and Node.js. The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.

When your agent uses it

  • Reviewing server-side rendering setup
  • Next.js App Router pages
  • Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until completion

Example prompts

  • “/streaming-html”

Requirements

  • Node.js

What it can do on your machine

Read from SKILL.md and the folder at commit e8d14d0. 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

    Links to these hosts (documentation or services it may open):

    • frontendchecklist.io

    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

Streaming HTML loads about 553 tokens when it runs, and up to ~2.6k if it reads all its reference files. Until then it costs about 50 tokens; SKILL.md has 244 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~50
When it runs · the whole SKILL.md, loaded when a task matches
~553
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.6k

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 thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 244 words, ~553 tokens.

Download SKILL.mdSave it as .claude/skills/streaming-html/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
streaming-html
description
Use when reviewing server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until completion.
metadata.category
performance
metadata.priority
medium
metadata.difficulty
advanced
metadata.estimatedTime
45
metadata.source
frontendchecklist.io
metadata.url
https://frontendchecklist.io/rules/performance/streaming-html

Stream HTML to the browser before the full response is ready

Traditional SSR waits for all data fetches to complete before sending a single byte of HTML, which means the browser cannot parse, discover subresources, or render anything until the slowest data query finishes. Streaming decouples the delivery of above-fold content from slow database queries and third-party API calls, dramatically improving perceived performance and LCP.

Quick Reference

  • Streaming sends HTML in chunks as it is generated instead of waiting for the full response
  • React renderToPipeableStream and Next.js App Router stream by default when you use Suspense
  • Place Suspense boundaries around slow data dependencies to flush above-fold HTML immediately
  • Monitor TTFB in Lighthouse — values above 600ms are a sign that streaming is not being used

Check

Examine this server-side rendering implementation to determine whether HTML is streamed in chunks or buffered until fully generated before sending to the client.

Fix

Refactor the SSR implementation to use renderToPipeableStream with Suspense boundaries around slow data fetches, or use ReadableStream in a Node.js handler, so that above-fold HTML is flushed to the client immediately.

Explain

Explain how streaming HTML improves TTFB and FCP by decoupling the delivery of fast content from slow server-side data dependencies.

Code Review

Review server entry points and page components for renderToString calls, missing Suspense boundaries around data-fetching components, and use of await on slow queries before returning a response.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/rules/performance/streaming-html

© thedaviddias, MIT. 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 (references) in skills/streaming-html of thedaviddias/Front-End-Checklist.

  • SKILL.md
  • references/rule.md

Open the folder on GitHubat commit e8d14d0

Compare with similar skills

Streaming HTML 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.

Streaming HTML compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Streaming HTML this skillthedaviddias/Front-End-Checklist74k—~553Automated safety check: PassMIT
Backend PatternshellangleZ/burn-in-cceverywhere-ralph11217 repos~3.3kAutomated safety check: PassNone
PayRam Checkout IntegrationPayRam/payram-mcp158—~3.4kAutomated safety check: NotesNone
Backend Patternsaffaan-m/ECC276k3 repos~3.3kAutomated safety check: PassMIT
Fullstack DevHHU3637kr/skills1453 repos~8.6kAutomated safety check: NotesMIT
Backend Patternsxu-xiang/everything-claude-code-zh2k—~3.2kAutomated safety check: PassMIT

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Works with

Categories

Questions about Streaming HTML

What does Streaming HTML do?

A skill your agent uses when reviewing server-side rendering setup, Next.js App Router pages, or Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until…. Streaming HTML is an agent skill from thedaviddias/Front-End-Checklist.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until completion.

When should I use Streaming HTML?

Streaming HTML fits situations like: reviewing server-side rendering setup; Next.js App Router pages; Node.js HTTP handlers to verify that HTML is streamed incrementally rather than buffered until completion.

How do I install Streaming HTML in Claude Code?

Run `npx skills add thedaviddias/Front-End-Checklist --skill streaming-html -a claude-code`. Or copy the skill folder (skills/streaming-html in thedaviddias/Front-End-Checklist) into .claude/skills/streaming-html in your project. Claude Code loads it when a task matches its description.

How do I install Streaming HTML in Codex?

Run `npx skills add thedaviddias/Front-End-Checklist --skill streaming-html -a codex`. Or copy the skill folder (skills/streaming-html in thedaviddias/Front-End-Checklist) into .agents/skills/streaming-html in your project. Codex loads it when a task matches its description.

Can I use Streaming HTML 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 thedaviddias/Front-End-Checklist --skill streaming-html -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/streaming-html, .gemini/skills/streaming-html, .github/skills/streaming-html and .opencode/skills/streaming-html in your project.

What does Streaming HTML need to run?

SKILL.md names no scripts, command-line tools or credentials: Streaming HTML is instructions for the agent only. Our summary lists: Node.js.

Does Streaming HTML access the network?

SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.

Is Streaming HTML 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 Streaming HTML use?

Streaming HTML is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Streaming HTML use?

About 553 tokens (SKILL.md is roughly 2.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2.1k tokens, read only when the agent opens those files.

What are the alternatives to Streaming HTML?

Skills that share tags, products or a category with Streaming HTML: Backend Patterns (hellangleZ/burn-in-cceverywhere-ralph, 112 stars), PayRam Checkout Integration (PayRam/payram-mcp, 158 stars), Backend Patterns (affaan-m/ECC, 276k stars) and Fullstack Dev (HHU3637kr/skills, 145 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Streaming HTML?

thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,412 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.

Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.