Check Cache Bugs

Check Cache Bugs is a Quality skill for Claude Code, published by FlorianBruniaux in claude-code-ultimate-guide.

5.7K stars751 forkson FlorianBruniaux/claude-code-ultimate-guideAdded 2026/08/15Repository updated 2026/08/14

agentic-codingai-assistantai-codingai-pair-programmingai-securityanthropicbest-practicesclaudeclaude-codeclaude-code-guideclaude-code-tutorialcli-toolcoding-assistantcursor-alternativedeveloper-toolsllmmcp-serversprompt-engineeringtutorialvibe-coding

Install in seconds

Install Check Cache Bugs

Copy Check Cache Bugs into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/FlorianBruniaux/claude-code-ultimate-guide/tree/main/examples/skills/check-cache-bugs ~/.claude/skills/check-cache-bugs

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/FlorianBruniaux/claude-code-ultimate-guide.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: examples/skills/check-cache-bugs/SKILL.md in FlorianBruniaux/claude-code-ultimate-guide
Installs to: ~/.claude/skills/check-cache-bugs
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Check Cache Bugs does

Check Cache Bugs audits a Claude Code setup for cache and cost bugs discovered in March-April 2026, including sentinel, resume/continue, and attribution header issues. Use it to verify your installation isn't affected by known caching defects.

Check Cache Bugs is cataloged under Quality on DirSkills. Check Cache Bugs comes from a repository tagged agentic-coding, ai-assistant, ai-coding, ai-pair-programming and ai-security.

Documentation

README

Excerpt

Check Cache Bugs (CC#40524)

Audit your Claude Code setup for cache and cost bugs discovered in March-April 2026.

Time: ~30 seconds | Scope: version, config files, CLAUDE.md, skills, hooks, shell profiles, all claude binaries

Note on cache contamination: This skill loads content containing cch= strings into the current session's message array. For cleanest results, run this command at the very start of a fresh session, or via claude -p "$(cat .claude/commands/check-cache-bugs.md)" as a one-shot print-mode invocation.

Reference: anthropics/claude-code#40524 | Discovered by: @jmarianski + @whiletrue0x | Extended by: @ArkNill (ArkNill/claude-code-cache-analysis, April 2026)

Background

Fix Status (current as of v2.1.92)

This is the opening of the README. Read the full README on GitHub.

Commands Check Cache Bugs provides

Slash commands named in this skill’s SKILL.md, listed in the order they first appear.

/export

Frequently asked about Check Cache Bugs

What else does FlorianBruniaux publish alongside Check Cache Bugs?
Check Cache Bugs is one of 25 skills that DirSkills catalogs from FlorianBruniaux/claude-code-ultimate-guide, the repository it ships in. Its siblings there include Audit Agents Skills, Audit Prose and Audit Whitepapers. Each one is a separate skill with its own page in this directory, installs the same way Check Cache Bugs does, and is maintained by FlorianBruniaux in that same repository. The rest of the collection is listed on the FlorianBruniaux/claude-code-ultimate-guide page.
How does Check Cache Bugs compare to other Quality skills?
Check Cache Bugs ranks #277 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Check Cache Bugs against them. Open each page to compare what they document and how they install.