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ClaudSkills / Security / threat-hunting

Txt Audit

Category: Security  ·  Sub-category: threat-hunting  ·  Last updated:
type:audittype:review
Review Apple text code for correctness, performance, and modernization risk in a single pass with severity-ranked findings. Covers TextKit 1 fallback triggers, NSTextStorage subclass correctness (edited / changeInLength / batched edits), didProcessEditing character-mutation bugs, deprecated glyph APIs, full-document ensureLayout, missing allowsNonContiguousLayout, NSLinguisticTagger / UIMenuController deprecations, missing performEditingTransaction wrappers on TextKit 2, Writing Tools coordinator gaps (writingToolsIgnoredRangesIn, isWritingToolsActive), String-vs-NSString length confusion in range arithmetic, and main-thread storage rules. Use when a user asks to audit, scan, or review a text editor codebase, when preparing an editor for shipping, when triaging a post-release regression in TextKit code, or when a pull request needs a structured pass focused on text-specific risks.

About this skill (catalog notes)

Txt Audit includes at least one code block. At roughly 1,622 words the SKILL.md is on the longer end of the catalog distribution.

License
MIT
Indexed lastmod
Catalog position
Security · threat-hunting
Indexed related skills
10

How Txt Audit fits the catalog

Txt Audit sits in the Security category under the threat-hunting sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Authored against iOS 26.x / Swift 6.x / Xcode 26.x.

What this skill does

Txt Audit is a community-contributed Claude Code skill in the threat-hunting sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/txt-audit/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when a user asks to audit, scan, or review a text editor codebase, when preparing an editor for shipping, when triaging a post-release regression in TextKit code, or when a pull request needs a structured pass focused on text-specific risks.

Who uses this skill

The Txt Audit Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

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

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

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

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

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.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Txt Audit Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/txt-audit/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Txt Audit skill do?
Review Apple text code for correctness, performance, and modernization risk in a single pass with severity-ranked findings. Covers TextKit 1 fallback triggers, NSTextStorage subclass correctness (edited / changeInLength / batched edits), didProcessEditing character-mutation bugs, deprecated glyph APIs, full-document ensureLayout, missing allowsNonContiguousLayout, NSLinguisticTagger / UIMenuController deprecations, missing performEditingTransaction wrappers on TextKit 2, Writing Tools coordinator gaps (writingToolsIgnoredRangesIn, isWritingToolsActive), String-vs-NSString length confusion in range arithmetic, and main-thread storage rules. Use when a user asks to audit, scan, or review a text editor codebase, when preparing an editor for shipping, when triaging a post-release regression in TextKit code, or when a pull request needs a structured pass focused on text-specific risks.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Txt Audit skill?
Use Txt Audit when your Claude Code task falls under the Security category — specifically in the threat hunting area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Txt Audit" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Txt Audit skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Txt Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Txt Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/txt-audit/
BibTeX
@misc{txt-audit-2026,
  author    = {ClaudSkills},
  title     = {Txt Audit [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/txt-audit/}
}

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