fused-render-authoring

fused-render-authoring is a skill for Claude Code, Codex from fusedio/fused-render. It costs 36 tokens per session (2,783 once invoked), scanned A, original, MIT.

A skill for creating and debugging fused-render views made from an HTML page and a Python data file. fused-render is a local browser explorer where HTML can call Python, save state in the URL, and read or write files.

In plain words
What is it for?
Use it when creating, editing, or debugging fused-render HTML views, Python data files, URL-controlled state, or preview templates.
Why use it?
It explains the connection between the page, Python data, URL parameters, file tools, and preview behavior, including common blank-page and traceback problems.

Skill for Claude CodeCodex

Part of the fused-render plugin — 15 skills 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/fusedio/fused-render/fused-render-authoring
Any agent
npx skills add fusedio/fused-render --skill fused-render-authoring
Clone the repo
git clone --depth 1 https://github.com/fusedio/fused-render

Made for: Claude Code, Codex.

Or install fused-render, the plugin that ships this one along with the rest of its 15 skills.

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 fused-render-authoring

README.md
[![agentmods](https://agentmods.dev/badge/skills/fusedio/fused-render/fused-render-authoring.svg)](https://agentmods.dev/skills/fusedio/fused-render/fused-render-authoring)
Your own site
<a href="https://agentmods.dev/skills/fusedio/fused-render/fused-render-authoring"><img src="https://agentmods.dev/badge/skills/fusedio/fused-render/fused-render-authoring.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,783 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 $0.00036 $0.02783
Opus 5 $0.00018 $0.01392
Sonnet 5 $0.00007 $0.00557
Haiku 4.5 $0.00004 $0.00278

Measured yesterday against content hash a45b8899c124, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fused-render-authoring 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 yesterday.

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.

skills/fused-render-authoring/SKILL.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring fused-render views

View = sibling pair: .html (UI) + .py (data). Explorer renders html in iframe, injects window.fused (never <script src> runtime), page calls local Python via fused.runPython. UI state lives in URL params → refresh-proof, bookmarkable. Plain HTML/CSS/JS. No framework, no build step.

App markers (entry page <head>, first 4 KiB)

<meta name="fused-app" />
<meta name="fused-api-version" content="N" />
  • fused-app = ONLY thing making folder an app. No marker → never in /apps, never registered.
  • fused-api-version: copy N from fused_render/app_starter/index.html. Missing tag = version 0. Migration → fused-render-api-migration.
  • Optional icon.svg beside entry page = sidebar glyph + favicon → fused-render-app-icon.

Python side: main()

One plain fn main(**params). Rules:

  • Annotate params — arrive as URL strings; annotations coerce (limit: int, bool accepts "true/1/yes/on"). Unannotated = raw string.
  • Default every param unless truly required.
  • Return JSON-native only (dict/list/str/int/float/bool/None). DataFrame → df.to_dict("records"); datetime/Decimal/numpy → cast.
  • Relative paths resolve beside .py.
  • Fresh subprocess per call. No globals survive. Import cost paid every call (pandas ≈ 1 s). Killed at 60 s (DEFAULT_TIMEOUT, fused_render/executor.py), no override. Longer work → fused-render-jobs.
  • print() → browser console as [python].

Available Python libraries

No pyproject.toml in folder → app interpreter: stdlib plus exactly this bundled set (authoritative: repo pyproject.toml[bundled] extra, plus pyarrow/duckdb/httpx from core [project] deps). Prefer it — zero install.

  • Data: numpy pandas pyarrow duckdb openpyxl msgpack
  • Images: pillow
  • Documents: python-pptx fpdf2 (import name fpdf)
  • Network & cloud: requests httpx botocore google-auth
  • Logs: drain3

Anything else needs folder pyproject.toml (project root only; add [tool.uv] package = false). Facts:

Read the full file on GitHub · 157 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. yesterday Changed · -313 lines · -68 tokens per session a45b8899c124
  2. 5d ago First seen · 470 lines · 104 tokens per session scan A decf3d7fbb11

Subscribe to this mod's changes

fused-render-authoring is a skill published in the GitHub repository fusedio/fused-render (11 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 2,783 once invoked, about $0.0002 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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