Txt Fallback Triggers

Quality score: 70/100 · Category: Content · Sub-category: content-misc

Catalog every API access and content shape that flips a UITextView or NSTextView from TextKit 2 (NSTextLayoutManager) to TextKit 1 (NSLayoutManager) compatibility mode. Covers explicit layoutManager access, glyph APIs, multi-container layout, NSTextTable / NSTextTableBlock content, the macOS field-editor cascade, framework-internal fallbacks, detection notifications, and recovery. Use when textView.textLayoutManager unexpectedly returns nil, when Writing Tools degrades to panel-only, when scrolling collapses on large documents after a build, or when auditing third-party code or your own extensions for fallback risk before shipping. Trigger on 'why did Writing Tools go panel-only', 'TextKit 2 stopped working', 'scrolling collapses', or any unexplained `textLayoutManager == nil`, even when 'fallback' isn't named. Do NOT use for symptom-driven debugging — see txt-textkit-debug. Do NOT use for the TK1 vs TK2 picker decision — see txt-textkit-choice.

What this skill does

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

When to invoke it: Use when textView.textLayoutManager unexpectedly returns nil, when Writing Tools degrades to panel-only, when scrolling collapses on large documents after a build, or when auditing third-party code or your own extensions for fallback risk before shipping.

Who uses this skill

The Txt Fallback Triggers skill is built for content creators, marketers, copywriters, SEO professionals, and editorial teams. 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-fallback-triggers
curl -L https://claudskills.com/skills/txt-fallback-triggers/SKILL.md \
  -o ~/.claude/skills/txt-fallback-triggers/SKILL.md

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

Skills live at ~/.claude/skills/txt-fallback-triggers/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\txt-fallback-triggers\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.