act-sdk-js: Skill for Claude Code

.agents/skills/colorize/SKILL.md

colorize is a skill for Claude Code, Codex from act-sdk/act-sdk-js. It costs 25 tokens per session (1,671 once invoked), scanned A, a copy of colorize, MIT.

A design skill for adding purposeful colour to interfaces that look overly gray or uniform. It first requires context about the audience, use cases, brand, and existing colours.

In plain words
What is it for?
Use it when reviewing or updating a monochrome interface, especially when brand colours and the intended audience are known.
Why use it?
It helps avoid random colour choices and gives a visually flat interface clearer emphasis and personality.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is act-sdk/act-sdk-js's own configuration. It tells Claude Code and Codex how to work on act-sdk-js 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 act-sdk-js configures →

Reuse

Borrowing it

Nothing to install: this file belongs to act-sdk/act-sdk-js. 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/act-sdk/act-sdk-js/main/.agents/skills/colorize/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/act-sdk/act-sdk-js

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 colorize

README.md
[![agentmods](https://agentmods.dev/badge/skills/act-sdk/act-sdk-js/colorize/github.svg)](https://agentmods.dev/skills/act-sdk/act-sdk-js/colorize)
Your own site
<a href="https://agentmods.dev/skills/act-sdk/act-sdk-js/colorize"><img src="https://agentmods.dev/badge/skills/act-sdk/act-sdk-js/colorize/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 colorize

Your own site · 80×15
<a href="https://agentmods.dev/skills/act-sdk/act-sdk-js/colorize"><img src="https://agentmods.dev/badge/skills/act-sdk/act-sdk-js/colorize.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,671 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 88% copy Near-identical to another mod 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 $0.00025 $0.01671
Opus 5.5 $0.00010 $0.00668
Sonnet 5.5 $0.00005 $0.00334
Haiku 4.5 $0.00003 $0.00167

Measured 1mo ago against content hash 3243c4db2620, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

colorize 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 1mo 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.

Origin

This is a copy

88% identical to colorize — 27 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/colorize/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Strategically introduce color to designs that are too monochromatic, gray, or lacking in visual warmth and personality.

MANDATORY PREPARATION

Context Gathering (Do This First)

You cannot do a great job without having necessary context, such as target audience (critical), desired use-cases (critical), brand personality/tone, and especially existing brand colors.

Attempt to gather these from the current thread or codebase.

  1. If you don't find exact information and have to infer from existing design and functionality, you MUST STOP and STOP and call the AskUserQuestionTool to clarify. whether you got it right.
  2. Otherwise, if you can't fully infer or your level of confidence is medium or lower, you MUST STOP and call the AskUserQuestionTool to clarify. clarifying questions first to complete your context.

Do NOT proceed until you have answers. Guessing leads to generic AI slop colors.

Use frontend-design skill

Use the frontend-design skill for design principles and anti-patterns. Do NOT proceed until it has executed and you know all DO's and DON'Ts.


Assess Color Opportunity

Analyze the current state and identify opportunities:

  1. Understand current state:

    • Color absence: Pure grayscale? Limited neutrals? One timid accent?
    • Missed opportunities: Where could color add meaning, hierarchy, or delight?
    • Context: What's appropriate for this domain and audience?
    • Brand: Are there existing brand colors we should use?
  2. Identify where color adds value:

    • Semantic meaning: Success (green), error (red), warning (yellow/orange), info (blue)
    • Hierarchy: Drawing attention to important elements
    • Categorization: Different sections, types, or states
    • Emotional tone: Warmth, energy, trust, creativity
    • Wayfinding: Helping users navigate and understand structure
    • Delight: Moments of visual interest and personality

If any of these are unclear from the codebase, STOP and call the AskUserQuestionTool to clarify.

Read the full file on GitHub · 158 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. 1mo ago First seen · 158 lines · 25 tokens per session scan A 3243c4db2620

Subscribe to this mod's changes

colorize is a skill published in the GitHub repository act-sdk/act-sdk-js (3 stars, last pushed 4mo ago), licensed MIT. It adds 25 tokens to every session and 1,671 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to colorize, differing in 27 lines, and is treated as a copy.

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