chat-formatting-widgets

A set of formatting rules for a chat interface that supports ordinary Markdown and a limited set of custom widgets.

In plain words
What is it for?
Use it when writing replies for the QuantumByte chat interface, especially when asking the user a question that must be answered.
Why use it?
It helps replies display correctly and ensures questions that need an answer use the interface's required yellow highlight.

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/quantumbyteoss/quantumbyte/chat_formatting_widgets
Any agent
npx skills add QuantumByteOSS/quantumbyte --skill chat_formatting_widgets
Clone the repo
git clone --depth 1 https://github.com/QuantumByteOSS/quantumbyte

Made for: Claude Code, Codex.

Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 186 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 $0.00050 $0.00186
Opus 5 $0.00025 $0.00093
Sonnet 5 $0.00010 $0.00037
Haiku 4.5 $0.00005 $0.00019

Measured 2d ago against content hash b312819dae00, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

chat-formatting-widgets 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.

apps/worker/shared/prompts/agents/main_agent/skills/chat_formatting_widgets/SKILL.md · 14 lines

What it actually says

Chat Formatting & Markdown Widgets

Your chat replies render through the QB Markdown Renderer, which accepts ordinary markdown plus a small allow-list of inline HTML widgets. Anything outside this list is stripped or rendered literal.

Inline Highlight (Yellow Marker)

  • Syntax: <span class="highlight-mark">text</span>
  • Mandatory Rule: Wrap the core question phrase in <span class="highlight-mark">...</span> whenever your message contains a question the user must answer (e.g. atomic child prompt, confirmation).
  • Limit: Highlight at most ONE phrase (3-8 words) per message. Do not highlight whole sentences.
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 · 14 lines · 50 tokens per session scan A b312819dae00

Subscribe to this mod's changes

chat-formatting-widgets is a skill published in the GitHub repository QuantumByteOSS/quantumbyte (322 stars, last pushed 20d ago), licensed Apache-2.0. It adds 50 tokens to every session and 186 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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