Claude Code mod
cache-keepwarm
Keeps the prompt cache of an idle Claude Code session warm: just before the cache lapses it submits a short service prompt, so your next message reads the context from the cache instead of writing it again. Off by default; /keepwarm on|off|status. Needs function hooks (early access).
Install
git clone https://github.com/mupamuc/cache-keepwarm.git
claude --plugin-dir ./cache-keepwarm/.The repo has no marketplace file, so load the plugin folder directly with --plugin-dir.
What it can access
- Reach
- L2Writes or runs: drives Claude, persists state, draws
- Sees
- every prompt
- Draws in
AbovePrompt- Hooks
session.startsession.endprompt.submitturn.startturn.stepturn.completecommand.runui.render
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
- mupamuc/cache-keepwarm
- Folder
.- Author
- mupamuc
- License
- MIT
- Last updated
- 4 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is cache-keepwarm?
Keeps the prompt cache of an idle Claude Code session warm: just before the cache lapses it submits a short service prompt, so your next message reads the context from the cache instead of writing it again. Off by default; /keepwarm on|off|status. Needs function hooks (early access). It is a mod for Claude Code, from mupamuc/cache-keepwarm on GitHub.
What can the cache-keepwarm mod access?
Its widest reach is "writes or runs" (drives Claude, persists state, draws). It sees every prompt. It draws in AbovePrompt. Like any mod, it runs with your permissions.
How do I install cache-keepwarm?
Clone mupamuc/cache-keepwarm and start Claude Code with --plugin-dir pointing at the mod's folder (.).
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Band above the prompt: prompt-cache countdown, cache hit rate, context fill and a Compact button, plus a keepwarm row from cache-tax that pings the cache through breaks and stops a cold send once with its rewrite cost.
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