Txt Attribute Keys

Quality score: 70/100 · Category: Engineering · Sub-category: mobile

lang:swift

Look up NSAttributedString.Key values, value types, and view-compatibility rules — typography, color, decoration, paragraph style, attachments, links, AppKit-only keys. Use when picking the right key, debugging an attribute that "does nothing," or checking whether an attribute survives in SwiftUI Text vs UITextView vs NSTextView. The key catalog and view-compatibility matrix change with each Foundation release; before claiming any signature is current, fetch via Sosumi (`sosumi.ai/documentation/foundation/nsattributedstring/key`). Do NOT use for the AttributedString-vs-NSAttributedString decision — see txt-attributed-string. Do NOT use for inline image/Genmoji embedding — see txt-attachments. Do NOT use for color-specific dark-mode behavior — see txt-colors.

What this skill does

Txt Attribute Keys is a production-ready Claude Code skill (quality score 70/100) in the mobile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/txt-attribute-keys/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when picking the right key, debugging an attribute that "does nothing," or checking whether an attribute survives in SwiftUI Text vs UITextView vs NSTextView. The key catalog and view-compatibility matrix change with each Foundation release; before claiming any signature is current, fetch via Sosumi (`sosumi.

Who uses this skill

The Txt Attribute Keys skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 15,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/txt-attribute-keys
curl -L https://claudskills.com/skills/txt-attribute-keys/SKILL.md \
  -o ~/.claude/skills/txt-attribute-keys/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/txt-attribute-keys/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/txt-attribute-keys/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\txt-attribute-keys\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

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