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webf: Skill for Claude Code

.agents/skills/webf-async-rendering/SKILL.md

webf-async-rendering is a skill for Claude Code, Codex from openwebf/webf. It costs 53 tokens per session (2,211 once invoked), scanned A, original, GPL-3.0.

A guide to WebF's delayed rendering process, where elements may not be laid out or visible when code first runs. It covers checking visibility and measuring elements at the right time.

In plain words
What is it for?
Use it when working with element sizes, positions, styles, or onscreen and offscreen events in WebF.
Why use it?
It helps explain zero-sized measurements, incorrect computed styles, and layout checks that run too early.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is openwebf/webf's own configuration. It tells Claude Code and Codex how to work on webf itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything webf configures →

not rated 2.5krepo +1 4mo ago A scan 53 tokens GPL-3.0
View source ↗ openwebf/webf openwebf.com
About the project

OpenWebF is a Flutter web runtime that implements HTML, CSS, the DOM, and JavaScript so developers can build app interfaces with web technologies inside Flutter applications. It is used to create cross-platform native apps with frameworks such as React, Vue, Svelte, and Solid. The catalogue add-ons support working with the WebF project.

openwebf/webf · 2,518 stars · on GitHub · openwebf.com

Reuse

Borrowing it

Nothing to install: this file belongs to openwebf/webf. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/openwebf/webf/main/.agents/skills/webf-async-rendering/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/openwebf/webf

Made for: Claude Code, Codex.

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 webf-async-rendering

README.md
[![agentmods](https://agentmods.dev/badge/skills/openwebf/webf/webf-async-rendering/github.svg)](https://agentmods.dev/skills/openwebf/webf/webf-async-rendering)
Your own site
<a href="https://agentmods.dev/skills/openwebf/webf/webf-async-rendering"><img src="https://agentmods.dev/badge/skills/openwebf/webf/webf-async-rendering/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for webf-async-rendering

Your own site · 80×15
<a href="https://agentmods.dev/skills/openwebf/webf/webf-async-rendering"><img src="https://agentmods.dev/badge/skills/openwebf/webf/webf-async-rendering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,211 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00053 $0.02211
Opus 5.5 $0.00021 $0.00884
Sonnet 5.5 $0.00011 $0.00442
Haiku 4.5 $0.00005 $0.00221

Measured 2mo ago against content hash dc54d2ca5b81, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

webf-async-rendering 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 2mo 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.

.agents/skills/webf-async-rendering/SKILL.md · 317 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 317 lines · 53 tokens per session scan A dc54d2ca5b81

Subscribe to this mod's changes

webf-async-rendering is a skill published in the GitHub repository openwebf/webf (2,518 stars, last pushed 4mo ago), licensed GPL-3.0. It adds 53 tokens to every session and 2,211 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-01.

Frontendcssflutterhtmljavascriptreactjsvue
Related

webf-async-rendering compared with skills from other repositories

webf-async-rendering next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
webf-async-renderingopenwebf/webfSkill2.5k4mo agoGPL-3.0A53Claude Code, Codex
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preline-theme-generatorhtmlstreamofficial/prelineSkill6.5k2mo agononeA89Claude Code, Codex
prettier-docspledgeandgrow/pledge-skillsSkill103mo agoMITA34Claude Code, Codex
screenshot-to-codechainlesschain/chainlesschainSkill11todaynoneA24Claude Code
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angular-enterpriseAtulPurohit/Antigravity-Awesome-SkillsSkill43mo agononeA25Claude Code, Codex