Claude Code mod
cache-tax
Warns before a prompt that would reload a cold prompt cache, with a token and cost estimate; /keepwarm keeps it warm.
Install
/plugin marketplace add Isaacg1000/isaac-mods
/plugin install cache-tax@isaac-modsMods 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, reads mod state, persists state, draws
- Sees
- every prompt
- Hooks
session.startcommand.runturn.startturn.stepturn.completeprompt.submit
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
- Isaacg1000/isaac-mods
- Folder
plugins/cache-tax- Marketplace
isaac-mods- Author
- Isaac
- Last updated
- 13 October 2026
- Listed in
- awesome-claude-code-mods
FAQ
What is cache-tax?
Warns before a prompt that would reload a cold prompt cache, with a token and cost estimate; /keepwarm keeps it warm. It is a mod for Claude Code, from Isaacg1000/isaac-mods on GitHub.
What can the cache-tax mod access?
Its widest reach is "writes or runs" (drives Claude, writes the prompt box, reads mod state, persists state, draws). It sees every prompt. Like any mod, it runs with your permissions.
How do I install cache-tax?
Inside Claude Code (v2.1.287 or later), run /plugin marketplace add Isaacg1000/isaac-mods and then /plugin install cache-tax@isaac-mods.
More context & usage mods
cache-tax
gauravruhela07/claude-mods
How well the prompt cache works and what the cache tax costs: hit %, cost and the money paid above all-cache-read, per turn, with cache-bust alerts.
cache-timer
bqnhat/claude-local-plugins
Shows how long the prompt cache stays warm, as a dim Cache mm:ss countdown in the footer of Claude Code Desktop, restarted by each model response of the main thread. The cache lifetime (5 minutes or 1 hour, per account) is learned from the responses: a cache read after more than five idle minutes means one hour, a full rewrite means five; until then the countdown shows ~ and assumes five
cache-meter
gauravlahoti/claude-mods
A band above the prompt showing how long the prompt cache stays warm, the last turn's hit rate, and a Compact button
cache-timer
katipally/modz
Prompt cache hit rate for the last request, and whether the cache is still warm with a countdown, above the prompt
cache-clock
Tihi321/claude-mods
Shows above the prompt how long the prompt cache stays warm, the cache hit rate, context use and plan limits, with a compact button. No model calls.
cache-waechter
Savo2610/claude-mods
Warnt vor teuren Nachrichten in großen, kalt gewordenen Sitzungen, zeigt die Cache-Restzeit unten rechts nur bei Bedarf und fragt vor dem Abkühlen per Telegram nach.
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