Claude Code mod
cache-guard
When a send would re-write a cold prompt cache, a dialog shows the estimated cost with Proceed and Start new session buttons. Adapted from Karan Bansal's cache-tax (MIT). Needs Claude Code 2.1.287 or later.
Install
/plugin marketplace add mgstegmaier/claude-plugins
/plugin install cache-guard@mgstegmaierMods install like plugins. Run /reload-plugins or start a new session to load it.
What it can access
- Reach
- L2Writes or runs: drives Claude, writes the prompt box, draws
- Sees
- classic hooks, every prompt, compaction
- Hooks
session.startclassic.SessionStartprompt.submitturn.stepturn.completesession.compact
From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.
How Claude Code mods work
- A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
- It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
- Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
- Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Details
- Repository
- mgstegmaier/claude-plugins
- Folder
plugins/cache-guard- Marketplace
mgstegmaier- Author
- Michael Stegmaier
- License
- MIT
- Last updated
- 27 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is cache-guard?
When a send would re-write a cold prompt cache, a dialog shows the estimated cost with Proceed and Start new session buttons. Adapted from Karan Bansal's cache-tax (MIT). Needs Claude Code 2.1.287 or later. It is a mod for Claude Code, from mgstegmaier/claude-plugins on GitHub.
What can the cache-guard mod access?
Its widest reach is "writes or runs" (drives Claude, writes the prompt box, draws). It sees classic hooks, every prompt, compaction. Like any mod, it runs with your permissions.
How do I install cache-guard?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add mgstegmaier/claude-plugins and then /plugin install cache-guard@mgstegmaier.
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